JP2012097417A - Spacer for deck plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spacer for a deck plate, capable of being shared even when the set thickness of a concrete slab is different, being utilized for bearing of both high-order bar and low-order bar of a weld wire net, and bearing the high-order bar or the low-order bar of the weld wire net surely even when an operator walks on the weld wire net further.SOLUTION: A spacer 1 for a deck plate includes a spacer body 10 for a deck plate, and the spacer body 10 for a deck plate is provided with a plurality of wire net bearing parts 14A-14D corresponding to different bearing heights of the weld wire net. The wire net bearing parts 14A-14D include fitting parts 14a1-14d1 whose upper parts are opened so as to fit the high-order bar or the low-order bar of the weld wire net, and also include lid parts 14a2-14d2 capable of freely closing the upper parts of the fitting parts 14a1-14d1.

Description

  TECHNICAL FIELD The present invention relates to a deck plate spacer for supporting a welded wire mesh to be embedded in a concrete slab when the concrete slab is placed on the deck plate in the construction of a concrete floor such as a building. .

  In recent years, when building a concrete floor such as a building, a method is often used in which a deck plate in which ridges and depressions are alternately arranged is bridged between steel beams and a concrete slab is placed on the deck plate with a required thickness. Has been. In this concrete slab, a grid-like welded wire mesh in which upper bars arranged in parallel in one vertical and horizontal direction and lower bars arranged in parallel in the other direction are welded at each intersection as a reinforcing material (rebar). Is buried.

  By the way, this welded wire mesh is defined so that the embedding position is at a certain depth from the surface of the concrete slab. Therefore, before placing the concrete slab, it is necessary to hold the concrete slab in a state of being floated to a required height from the deck plate according to the thickness of the concrete slab. Therefore, in order to realize the holding state, various types of spacers made of hard synthetic resin moldings, wire materials, concrete small blocks, etc. are arranged on the deck plate at required intervals, and the above spacers are used. A method of supporting a welded wire mesh on a deck plate is used.

  However, since the spacer only supports the welded wire mesh at a certain height from the deck plate, there are the following problems. In other words, the set thickness of concrete slabs varies depending on the size of the building, floor area, required load bearing strength, etc., which is why many types of spacers with different bearing heights are used to accommodate the differences. There is a problem that it is necessary to manufacture and hold it in stock, which results in high production cost and high storage cost due to high-mix low-volume production.

  On the other hand, the spacer is supported by placing the upper or lower reinforcement of the welding wire mesh, but when placing the concrete slab, the operator works on the welding wire mesh, The above-mentioned welded wire mesh is generally a unit supplied as a rectangular unit having a certain vertical and horizontal dimension. The welded wire mesh is laid on a deck plate and bound with a wire or the like. This binding work is also performed on the welded wire mesh. People get on and work. Therefore, when an operator walks on the welded wire mesh for placement work or bundling work, the above-mentioned spacer tends to fall down or come off from the welded wire mesh, and it takes a lot of labor to repair it, and it is not noticed. When the slab is driven, there is a problem that the construction quality is deteriorated due to partial settlement or misalignment of the welded wire mesh.

  Accordingly, as an invention for solving such a problem, a spacer for a deck plate as described in Patent Document 1 has been proposed. This deck plate spacer has a plurality of wire mesh support portions corresponding to different support heights of the welded wire mesh, and each wire mesh support portion opens upwardly to a pair capable of fitting the upper and lower reinforcements of the welded wire mesh. It is comprised from the fitting part.

JP-A-10-331331

  This deck plate spacer can be used even when the set thickness of the concrete slab is different, and it can be used to support either the upper or lower reinforcement of the welded wire mesh, so the production cost can be reduced by mass production of a single product. In addition to being possible, the welded wire mesh can be brought into a stable support state by a simple operation, which is very useful.

  However, since the fitting portion of the wire mesh support portion is opened upward, the deck plate spacer is supported by the fitting portion when an operator walks on the welded wire mesh in a placement operation or a binding operation. If the upper or lower bars are disengaged from the mating part, it takes a lot of time to repair them, and if a concrete slab is placed without being noticed, a part of the welded wire mesh In some cases, the work quality was degraded due to settlement or misalignment.

  Therefore, in view of the above circumstances, the present invention can be shared even when the set thickness of the concrete slab is different, and can be used for supporting either the upper or lower reinforcement of the welded wire mesh. It is an object of the present invention to provide a deck plate spacer that can reliably support the upper or lower reinforcement of the welded wire mesh even when walking.

  In order to achieve the above object, a description will be given with reference numerals of one embodiment described later. In the deck plate spacer according to claim 1 of the present invention, the protruding strip portions 3a and the recessed portions 3b are alternately arranged. When the concrete slab 4 is placed on the deck plate 3, the welded wire mesh 2 in which the upper reinforcement 2a arranged in parallel in one vertical and horizontal direction and the lower reinforcement 2b arranged in parallel in the other direction are welded at each intersection is used as the concrete. A deck plate spacer 1 having a deck plate spacer body 10 which is installed on the deck plate 3 and floats and supports the welded wire mesh 2 from the deck plate 3 to be embedded in the slab 4. The deck plate spacer body 10 includes a plurality of wire mesh support portions 14A to 14D corresponding to different support heights of the welded wire mesh 2, and the wire mesh support portion. 4A to 14D are provided with fitting portions 14a1 to 14d1 whose upper portions are opened so that the upper reinforcement 2a or the lower reinforcement 2b of the welded wire mesh 2 can be fitted, and above the fitting portions 14a1 to 14d1. The cover part 14a2-14d2 which can be closed freely is provided, It is characterized by the above-mentioned.

  According to a second aspect of the present invention, in the deck plate spacer according to the first aspect, at least one of the lid portions 14a2 to 14d2 provided in each of the wire mesh support portions 14A to 14D is substantially semicircular. It is characterized by being formed in a spherical shape.

  Furthermore, the invention of claim 3 is the deck plate spacer according to claim 1 or 2, wherein the deck plate spacer body 10 is bent from the central vertical plate portion 11 and both side ends thereof and opposite to each other. The two vertical side plates 12 and 13 projecting from each other form a substantially Z-shape in plan view, and each of the central vertical plate portion 11 and the two vertical side plate portions 12 and 13 is provided with at least one wire mesh support portion 14A to 14D. It is characterized by being made.

  According to a fourth aspect of the present invention, in the deck plate spacer according to the third aspect, the lower portions of the vertical side plate portions 12 and 13 project to the opposite side of the vertical side plate portions 12 and 13, respectively. It is characterized in that it is provided with anti-falling protrusions 12a, 13a.

  Next, effects of the present invention will be described with reference numerals in the drawings. First, in the spacer for deck plates according to the invention of claim 1, since the wire mesh support portions 14A to 14D correspond to different support heights of the welded wire mesh 2, they are shared even when the set thickness of the concrete slab is different. it can. Furthermore, since the fitting part 14a1-14d1 which can support the upper reinforcement 2a or the lower reinforcement 2b of the welding wire mesh 2 is provided in the wire mesh support parts 14A-14D, it is possible to support either the upper reinforcement or the lower reinforcement of the welding mesh. Can also be used. Further, when the upper reinforcement 2a or the lower reinforcement 2b of the welded wire mesh 2 is supported by the wire mesh support portions 14A to 14D, the upper portions of the fitting portions 14a1 to 14d1 of the wire mesh support portions 14A to 14D are opened, and the above-mentioned from above. After the upper muscle 2a or the lower muscle 2b is fitted into the fitting portions 14a1 to 14d1, the upper portions of the opened fitting portions 14a1 to 14d1 need only be closed by the lid portions 14a2 to 14d2. Therefore, according to the present invention, since the operation is extremely simple, the work can be completed easily and in a short time with little effort.

  On the other hand, since the upper reinforcement 2a or the lower reinforcement 2b of the welded wire mesh 2 fitted in the fitting portions 14a1 to 14d1 is closed above the fitting portions 14a1 to 14d1 by the lid portions 14a2 to 14d2, the concrete slab 4 Even when an operator walks on the wire netting 2 or when the welding wire meshes 2 are bound together at the previous stage of the placement, it is not pulled out from the fitting portions 14a1 to 14d1. Therefore, according to the present invention, it is possible to reliably support the upper bar or the lower bar of the welded wire mesh. For this reason, it is possible to reliably avoid a reduction in construction quality due to partial settlement or misalignment of the welded wire mesh 2 without the need for conventional repair work.

  According to the invention of claim 2, since at least one of the lid portions 14a2 to 14d2 provided in each of the wire mesh support portions 14A to 14D is formed in a substantially hemispherical shape, the lid portion is used as a tool. When folding by hand or hand, it becomes very easy to bend and work efficiency can be improved.

  Further, according to the invention of claim 3, the deck plate spacer main body 10 is a plan view comprising a central vertical plate portion 11 and both vertical side plate portions 12 and 13 which are bent from both side ends and project to opposite sides. Since it is substantially Z-shaped and each of the central vertical plate portion 11 and the two vertical side plate portions 12 and 13 is provided with at least one wire mesh support portion 14A to 14D, the central vertical plate portion and the two vertical side plate portions are provided. Each wire mesh support can be used to accommodate at least three different set thicknesses of concrete slabs. Furthermore, by setting it as the above structures, it can carry out self-holding in the standing state, and can be made into the superposition | polymerization state which is not bulky at the time of storage or conveyance.

  According to the invention of claim 4, as the above-described deck plate spacer having a substantially Z shape in plan view, it is difficult to fall down when pushed from any direction, particularly in a standing state, and the supported state of the welded wire mesh is further stabilized. Can be made.

It is a perspective view of the spacer for deck plates which concerns on one Embodiment of this invention. It is a top view after the punching of the spacer according to the embodiment. It is a side view which shows the state which piled up the multiple spacer which concerns on the same embodiment. It is a perspective view which shows the usage method of the spacer for deck plates which concerns on one Embodiment of this invention, and shows the state which supported the welded metal mesh with the spacer. The usage method of the spacer for deck plates which concerns on one Embodiment of this invention is shown, (a) is the state which open | released the upper part of the fitting part of the metal-mesh support part of the spacer, and supported the upper reinforcement of the weld-mesh, (b ) Is a longitudinal sectional front view of a state in which the upper part of the welded wire mesh is supported by closing the upper portion of the fitting portion of the wire mesh support portion of the spacer. It is a vertical side view which shows the support state of the lower reinforcement of the weld metal mesh. The usage method of the spacer for deck plates which concerns on one Embodiment of this invention is shown, (a) is the state which open | released the upper part of the fitting part of the metal-mesh support part of the spacer, and supported the upper reinforcement of the weld-mesh, (b ) Is a longitudinal sectional front view of a state in which the upper part of the welded wire mesh is supported by closing the upper portion of the fitting portion of the wire mesh support portion of the spacer.

  Hereinafter, an embodiment of a spacer for a deck plate according to the present invention will be specifically described with reference to FIGS.

  As shown in FIG. 1, the deck plate spacer 1 according to the present embodiment includes a deck plate spacer body 10 made of a single metal plate having a substantially Z shape in plan view. The deck plate spacer body 10 has a wide central vertical plate portion 11 having the highest upper edge position, and a narrow and intermediate upper edge height that protrudes laterally at a right angle from one side end thereof. A first vertical side plate portion 12 that is positioned, and a second vertical position that is positioned on the left side of the narrow sheet of paper that projects to the opposite side of the first vertical side plate portion 12 at a right angle from the other end of the vertical plate portion 11. It is comprised with the side-plate part 13. FIG.

  As shown in FIGS. 1 and 2, the central vertical plate portion 11 is provided with a pair of wire mesh support portions 14A and 14B on the upper side, and the first vertical side plate portion 12 and the second vertical side plate portion 13 are also provided. Further, wire mesh support portions 14C and 14D are respectively provided on the upper side. The wire mesh support portions 14A to 14D are provided with fitting portions 14a1, 14b1, 14c1, and 14d1 that are notched so that the upper portion is opened, and a lid portion 14a2 that can freely close the opened upper portion. , 14b2, 14c2, and 14d2. The fitting portions 14a1 to 14d1 are formed in a substantially slit-shaped groove, and the lower portion of the slit-shaped groove is formed in an arc shape, and the upper portion is formed in a divergent shape. The lid portions 14a2 to 14d2 are projected from the upper surfaces of the fitting portions 14a1 to 14d1 so as to cover the upper surfaces of the fitting portions 14a1 to 14d1, and are moved in the front-rear direction with a tool or a hand (see arrows in FIGS. 5 and 7). ) It is formed so that it can be bent. Further, the lid portions 14a2 to 14d2 have a lid portion 14a2 formed in a rod shape and the lid portions 14b2 to 14d2 formed in a substantially semispherical shape. Thus, if the lid portion is formed in a substantially semispherical shape, when the lid portion is folded in the front-rear direction with a tool or a hand, it is very easy to bend and work efficiency can be improved. The lid portion 14a2 is formed in a rod shape because the fitting portion 14a1 is shallower than the other fitting portions 14b1 to 14d1, and thus the lid portion 14a2 is formed in a substantially hemispherical shape. This is because the upper part of the fitting portion 14a1 cannot be closed while supporting a later-described welded wire mesh 2 (see FIGS. 4 to 7).

  The wire mesh support portions 14A to 14D configured in this way are set so that the heights are different from the higher order in the order of 14A-14B-14C-14D. For example, when the height of the central vertical plate portion 11 is 50 mm, the height of the first vertical side plate portion is 35 mm, and the height of the second vertical side plate portion is about 25 mm, the wire mesh support portions 14A to 14D are The flying height (the top 2a of the upper bar or the top of the lower bar 2b) from the deck plate 3 (see FIGS. 4 to 7) of the welded wire mesh 2, which will be described later, is 50 mm for the wire mesh support 14A and 40 mm for the wire mesh support 14B. The wire mesh support 14C is set to 30 mm, and the wire mesh support 14D is set to 20 mm.

  On the other hand, the central vertical plate part 11 is provided with a circular hole 11a at a substantially central part and a semi-elliptical spherical through hole 11b at a lower part. Thereby, since the concrete slab to be placed by the central vertical plate portion 11 is not dammed up, the concrete slab can be efficiently placed.

  In addition, the first vertical side plate portion 12 is formed with a notch formed on the lower portion thereof so as to cut out, and the anti-falling projection piece 12a is formed so as to project at an angle of 135 ° with respect to the first vertical side plate portion 12. Yes. The second vertical side plate portion 13 is also formed with a notch formed on the lower portion thereof so as to notch, and the anti-falling projection piece 13a is formed so as to project at an angle of 135 ° with respect to the second vertical side plate portion 13. . In this way, by providing the fall-preventing protruding piece, the deck plate spacer having a substantially Z-shape in plan view is not easily fallen even if pushed in any direction in the standing state, and the welding wire mesh 2 (FIG. 4) described later. (See FIG. 7) can be further stabilized.

  By the way, in order to manufacture the deck plate spacer 1 configured as described above, a metal plate such as a steel plate is punched into a shape shown in FIG. 3 by press working, and gold is inserted into the circular hole 11a provided in the central vertical plate portion 11. After positioning by inserting the convex shaft portion of the mold, one of the left and right folding curves indicated by the broken line in the figure is bent at one side, and the other is bent at a right angle by mountain folding. , 13 are formed. And with the bending process, the fall prevention protrusions 12a and 13a caused from the two vertical side plate portions 12 and 13 are further bent to the above-described angle. Thereby, the deck plate spacer 1 can be manufactured. Therefore, since the deck plate spacer 1 according to the present embodiment can be manufactured by punching and bending, it can be mass-produced inexpensively and easily. In addition, the deck plate spacer 1 manufactured so as to have a substantially Z-shape in a plan view as described above is not bulky by stacking a plurality of pieces as shown by phantom lines in FIG. Can do. At that time, it is preferable to overlap the lid portions 14a2 to 14d2 in a state where the upper portions of the fitting portions 14a1 to 14d1 are closed so as not to interfere with the overlapping. In addition, when punching and forming the shape shown in FIG. 2 by press working so that the fall-preventing protrusions 12a and the fall-preventing protrusions 13a overlap each other, the lower portions of the vertical side plate portions 12 and 13 and the fall-preventing protruding pieces 12a are formed. , 13a is preferably pressed so as to form a small gap 12b, 13b so that the peripheral edge of 13a does not contact.

  Next, a usage example of the deck plate spacer 1 will be specifically described with reference to FIGS. As shown in FIG. 4, the deck plate spacer 1 is placed on the deck plate 3 at an appropriate interval, and holds the welded wire mesh 2 in a state of floating from the deck plate 3. More specifically, the welded wire mesh 2 is composed of a steel grid-like mesh in which upper bars 2a arranged in parallel in one vertical and horizontal direction and lower bars 2b arranged in parallel in the other direction are welded at each intersection. 3 consists of a steel plate on a corrugated sheet in which ridges 3a and recesses 3b are alternately arranged. The deck plate spacer 1 is placed on the ridge portion 3a of the deck plate 3 configured as described above, and the wire mesh support portion 14A according to the set thickness of the concrete slab to be placed on the deck plate 3. The upper reinforcement 2a or the lower reinforcement 2b of the welded wire mesh 2 configured as described above is supported by using any one of -14D, and the welded wire mesh 2 is held at the required height from the deck plate 3. Is.

  For example, if the set thickness of the concrete slab is 80 mm and the depth of the welding wire mesh 2 from the concrete slab surface (the top position of the upper reinforcement 2a) is 30 mm, the position of the welding mesh 2 (the top of the upper reinforcement 2a) Since the position) is 50 mm from the surface of the ridge portion 3a of the deck plate 3, according to the above exemplified dimension setting of the deck plate spacer 1 according to this embodiment, the wire mesh support portion 14A is used. It becomes. That is, as shown in FIG. 5, the upper vertical bar 2a of the welded wire mesh 2 is fitted to the fitting portion 14a1 of the wire mesh support portion 14A so that the central vertical plate portion 11 is oriented along the width direction of the protruding strip portion 3a of the deck plate 3. And support. More specifically, as shown in FIG. 5 (a), the lid 14a2 of the wire mesh support 14A indicated by the phantom line is bent in the direction of the arrow P1 using a tool or a hand, and the fitting portion of the wire mesh support 14A. After the upper reinforcement 2a of the welded wire mesh 2 is fitted and supported on 14a1, as shown in FIG. 5 (b), the lid 14a2 is moved with a tool or hand in the direction opposite to the arrow P1 shown in FIG. 5 (a). Used to bend and close the upper portion of the fitting portion 14a1. Thereby, the upper reinforcement 2a of the welding wire mesh 2 can be reliably supported by the wire mesh support portion 14A.

  On the other hand, if the embedding depth of the welded wire mesh 2 from the concrete slab surface (the top position of the lower reinforcement 2b) is 30 mm, the position of the welded mesh 2 (the top position of the lower reinforcement 2b) is the ridge of the deck plate 3. Since the height is 50 mm from the surface of the portion 3a, as shown in FIG. 6, the center vertical plate portion 11 is oriented along the longitudinal direction of the ridge portion 3a of the deck plate 3, and the fitting portion of the wire mesh support portion 14A. The lower muscle 2b is fitted into 14a1 and supported. 5 and 6, t is the depth of the weld metal mesh 2 embedded from the surface of the concrete slab 4 indicated by the phantom line, and h is the flying height of the weld metal mesh 2 from the surface of the protruding portion 3 a of the deck plate 3. That's it. Therefore, (t + h) is the set thickness of the concrete slab 4.

  On the other hand, if the set thickness of the concrete slab is 70 mm and the embedding depth of the welded mesh 2 from the concrete slab surface (the top position of the upper reinforcement 2a) is 30 mm, the position of the welded mesh 2 (the top of the upper reinforcement 2a) Since the position) is 40 mm from the surface of the protruding strip portion 3a of the deck plate 3, according to the above exemplified dimension setting of the deck plate spacer 1 according to the present embodiment, the wire mesh support portion 14B is used. It becomes. That is, as shown in FIG. 7, the upper vertical bar 2a of the welding wire mesh 2 is fitted to the fitting portion 14b1 of the wire mesh support portion 14B so that the central vertical plate portion 11 is oriented along the width direction of the protruding strip portion 3a of the deck plate 3. And support. More specifically, as shown in FIG. 7A, the lid 14b2 of the wire mesh support 14B indicated by the phantom line is bent in the direction of the arrow P2 using a tool or a hand, and the fitting portion of the wire mesh support 14B. After the upper reinforcement 2a of the welded wire mesh 2 is fitted to 14b1 and supported, as shown in FIG. 7 (b), the lid 14b2 is moved with a tool or hand in the direction opposite to the arrow P2 shown in FIG. 7 (a). Used to bend and close the upper portion of the fitting portion 14b1. Thereby, the upper reinforcement 2a of the welding wire mesh 2 can be reliably supported by the wire mesh support portion 14B. In FIG. 7, t and h are the same reference numerals as those in FIGS. 5 and 6, and are therefore given the same reference numerals.

  Thus, each of the central vertical plate portion 11 and the vertical metal plate support portions 14A to 14D of the vertical plate portions 12 and 13 of the spacer 1 for the deck plate according to the present embodiment is higher than the welded wire mesh 2 fitted to one of them. Since the rebar 2a or the lower rebar 2b does not interfere with the other wire mesh support portions 14A to 14D, the embedding depth of the welded wire net 2 from the surface of the concrete slab 4 (the top position of the upper rebar 2a or the lower rebar 2b) is determined. If it is 30 mm as described above, it can be used for any of the four set thicknesses (h + t) of the concrete slab 4, that is, any set thickness of 80 mm, 70 mm, 60 mm, and 50 mm.

  According to this embodiment described above, since the wire mesh support portions 14A to 14D correspond to different support heights of the welded wire mesh 2, they can be shared even when the set thickness of the concrete slab 4 is different. Furthermore, since the metal mesh support portions 14A to 14D are provided with fitting portions 14a1 to 14d1 that can support the upper reinforcement 2a or the lower reinforcement 2b of the welding wire mesh 2, either the upper reinforcement 2a or the lower reinforcement 2b of the welding mesh 2 is provided. Can also be used to support Further, when the upper reinforcement 2a or the lower reinforcement 2b of the welded wire mesh 2 is supported by the wire mesh support portions 14A to 14D, the upper portions of the fitting portions 14a1 to 14d1 of the wire mesh support portions 14A to 14D are opened, and the above-mentioned from above. After the upper muscle 2a or the lower muscle 2b is fitted into the fitting portions 14a1 to 14d1, the upper portions of the opened fitting portions 14a1 to 14d1 need only be closed by the lid portions 14a2 to 14d2. Therefore, according to the present embodiment, since the operation is extremely simple, the work can be completed easily and in a short time with little effort.

  On the other hand, since the upper reinforcement 2a or the lower reinforcement 2b of the welded wire mesh 2 fitted in the fitting portions 14a1 to 14d1 is closed above the fitting portions 14a1 to 14d1 by the lid portions 14a2 to 14d2, the concrete slab 4 Even when an operator walks on the wire netting 2 before bundling or when the welding wire mesh 2 is bound, the upper muscle 2a or the lower muscle 2b is pulled out from the fitting portions 14a1 to 14d1. There is no out. Therefore, according to this embodiment, the upper reinforcement 2a or the lower reinforcement 2b of the welded wire mesh 2 can be reliably supported. For this reason, it is possible to reliably avoid a reduction in construction quality due to partial settlement or misalignment of the welded wire mesh 2 without the need for conventional repair work.

  On the other hand, in the floor of a small building or the like, the set thickness of the concrete slab 4 is often 50 mm. In this case, if a spacer having a height of 50 mm is used as exemplified in the above embodiment, the concrete slab 4 is It is only necessary to drive until the top of the spacer is reached, and there is an advantage that the spacer serves as a guide for the thickness of the spacer.

  In this embodiment, the case where the deck plate spacer is applied to the concrete slab 4 having a maximum set thickness of 80 mm has been described. However, the height of the spacer (the position of the highest wire mesh support part) can be variously set. It is.

  Further, the deck plate spacer according to the present embodiment has the overall shape, size, material, set position and number of wire mesh support portions 14A to 14D, and fitting portions 14a1 to 14d1 of the wire mesh support portions 14A to 14D. In addition to the embodiments exemplified above, various design changes can be made to the detailed configuration such as the structure and shape of the lid portions 14a2 to 14d2 and the stripe diameter of the welded wire mesh 2 to be applied.

DESCRIPTION OF SYMBOLS 1 Deck plate spacer 2 Welded wire mesh 2a Upper bar 2b Lower bar 3 Deck plate 3a Convex part 3b Concave part 4 Concrete slab 10 Deck plate spacer body 11 Central vertical plate part 12 First vertical side plate part 12a (first Falling prevention protrusion 13 (of the vertical side plate portion) Second vertical side plate portion 13a (The second vertical side plate portion) of the falling prevention protrusion pieces 14A to 14D Wire mesh support portions 14a1 to 14d1 Fitting portions 14a2 to 14d2 Lid

Claims (4)

When placing concrete slabs on a deck plate with ridges and recesses alternately arranged, the upper bars arranged in parallel in one vertical and horizontal direction and the lower bars arranged in parallel in the other direction are welded at each intersection. In order to embed the welded wire mesh in the concrete slab, a deck plate spacer having a deck plate spacer body installed on the deck plate and supported by floating the welded wire mesh from the deck plate,
The deck plate spacer body has a plurality of wire mesh support portions corresponding to different support heights of the welded wire mesh,
The wire mesh support portion is provided with a fitting portion whose upper portion is opened so that the upper or lower reinforcement of the weld wire mesh can be fitted, and a lid portion that can be freely closed above the fitting portion. A spacer for a deck plate, characterized in that is provided.   2. The deck plate spacer according to claim 1, wherein at least one of the lid portions provided in each of the wire mesh support portions is formed in a substantially semispherical shape.   The spacer body for the deck plate has a substantially Z-shape in plan view comprising a central vertical plate portion and both vertical side plate portions bent from both side ends and projecting to opposite sides. The deck plate spacer according to claim 1 or 2, wherein each of the side plate portions is provided with at least one wire mesh support portion. 4. The deck plate spacer according to claim 3, wherein a tilt-proof protruding piece is provided at a lower portion of each of the vertical side plate portions and protrudes to a side opposite to the two vertical side plate portions.

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