Spacer for waterproof protective concrete

Abstract

To acquire a spacer for waterproof protective concrete which can be adapted to any thickness of waterproof protective concrete by one type.SOLUTION: A spacer for waterproof protective concrete for maintaining the height of a wire mesh embedded in waterproof protective concrete placed on a rooftop slab of a building includes: a slender-shaped tabular seat part 2 in which a lower surface serves as a contact surface coming into contact with the rooftop slab; and a tabular support part 4 which is positioned substantially at the center in the width direction of the tabular seat part 2, which stands at predetermined height, which is provided across the longer direction of the tabular seat part 2, on the upper surface of the tabular seat part 2, and which supports the wire mesh at an upper side 3. At the upper side 3 of the tabular support part 4, a plurality of protrusions 5 is provided with an interval in the longer direction, and on the lower surface of the tabular seat part 2, a fitting groove 6 is formed in which the protrusion 5 can be fitted.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a spacer for waterproof protective concrete for maintaining the height of a wire mesh embedded in waterproof protective concrete poured onto the roof slab of a building. [Background technology]

[0002] When pouring waterproof protective concrete onto the roof slab of a building, waterproof protective concrete spacers are used to keep the height (cover thickness) of the wire mesh embedded in the waterproof protective concrete constant from the top surface of the roof slab.

[0003] Conventionally, as a spacer for maintaining the height of a wire mesh, a spacer as described in Patent Document 1, for example, has been known which has a base-shaped grounding portion that is rectangular in plan view and grounded on the base surface, and a plate-shaped support wall that is integrally molded in the center of the width of this grounding portion, parallel to the grounding portion and has an inverted T-shaped cross section, along the longitudinal direction, and supports the wire mesh by placing it on the upper edge of the support wall. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3218227 Summary of the Invention [Problem to be solved by the invention]

[0005] The height of the wire mesh (cover thickness) is determined by the thickness of the waterproofing concrete to be poured. The thickness of the waterproofing concrete is generally 60 to 120 mm depending on the building's use, the required water gradient, etc., and the height of the spacer to ensure the height of the wire mesh (cover thickness) required for such a thickness of waterproofing concrete is generally 30 mm when the thickness of the waterproofing concrete is 60 mm, and 60 mm when it is 120 mm.

[0006] For this reason, a spacer with a waterproof concrete thickness of 60 mm cannot accommodate a waterproof concrete thickness of 120 mm, and a spacer with a waterproof concrete thickness of 120 mm cannot accommodate a waterproof concrete thickness of 60 mm. Therefore, it is necessary to prepare multiple types of spacers with heights corresponding to the thickness of the waterproof concrete.

[0007] An object of the present invention is to provide a spacer for waterproof protective concrete which can accommodate waterproof protective concrete of various thicknesses with a single type of material. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the invention described in claim 1 is a spacer for waterproof protective concrete for maintaining the height of a wire mesh embedded in waterproof protective concrete poured on the roof slab of a building, comprising: an elongated plate-shaped seat portion whose underside is a contact surface that abuts against the roof slab; and a plate-shaped support portion on the upper surface of the plate-shaped seat portion, located approximately in the center of the width of the plate-shaped seat portion, rising to a predetermined height and provided along the longitudinal direction of the plate-shaped seat portion, and supporting the wire mesh at its upper edge, wherein a plurality of protrusions are provided on the upper edge of the plate-shaped support portion at intervals in the longitudinal direction, and the underside of the plate-shaped seat portion is formed with an engagement groove into which the protrusions can fit.

[0009] According to the invention described in claim 1, the spacer comprises an elongated plate-shaped seat portion whose underside serves as a contact surface that contacts the roof slab, and a plate-shaped support portion on the upper surface of the plate-shaped seat portion, which is located approximately in the center of the width of the plate-shaped seat portion, rises to a predetermined height, and is provided along the longitudinal direction of the plate-shaped seat portion, supporting a wire mesh at its upper edge, and a plurality of protrusions are provided on the upper edge of the plate-shaped support portion at intervals in the longitudinal direction, and a fitting groove is formed on the underside of the plate-shaped seat portion into which the protrusions can fit.Therefore, by placing the underside of the plate-shaped seat portion of one spacer on the upper edge of the plate-shaped support portion of another spacer and fitting the protrusion provided on the upper edge of the plate-shaped support portion of one spacer into the fitting groove formed on the underside of the plate-shaped support portion of the other spacer, the one spacer and the other spacer can be assembled together vertically, and a composite spacer of double height can be obtained. Therefore, by setting the height of a single spacer to correspond to the minimum height of the general thickness of waterproof protective concrete, one type of spacer can be used to accommodate the general thickness of waterproof protective concrete from the minimum to maximum thicknesses. Furthermore, the protrusion provided on the upper edge of the plate-shaped support portion abuts against the wire mesh arranged on the upper edge of the plate-shaped support portion, preventing the wire mesh from sliding laterally.

[0010] The invention described in claim 2 is characterized in that a reinforcing plate is provided on the upper surface of the plate-shaped seat portion described in claim 1 to support the side of the plate-shaped support portion, and the reinforcing plate has an upper edge at the same height as the plate-shaped support portion.

[0011] According to the invention described in claim 2, a reinforcing plate which supports the side of the plate-shaped support part is provided on the upper surface of the plate-shaped seat part, so that it can withstand the weight of the waterproof protective concrete when poured, support the wire mesh and reliably maintain the height of the wire mesh; further, since the reinforcing plate has an upper edge at the same height as the plate-shaped support part, when the underside of the plate-shaped seat part of one spacer is placed on the upper edge of the plate-shaped support part of another spacer, the underside of the plate-shaped seat part of the higher spacer abuts and is supported by the upper edge of the reinforcing plate which supports the side of the plate-shaped support part of the lower spacer, so that the one spacer and the other spacer can be assembled together in a stable vertical state.

[0012] The invention as set forth in claim 3 is characterized in that the plate-shaped supporting portion according to claim 1 or 2 is formed with holes for binding a wire mesh.

[0013] According to the invention described in claim 3, a hole for binding wire mesh is formed in the plate-shaped support part, so that by passing a wire or the like through the hole for binding wire mesh and binding the wire mesh arranged on the upper edge of the plate-shaped support part to the plate-shaped support part, the arrangement of the wire mesh on the upper edge of the plate-shaped support part can be reliably maintained. Effect of the Invention

[0014] As described above, the spacer for waterproof protection concrete according to the present invention can accommodate waterproof protection concrete of various thicknesses with just one type. [Brief description of the drawings]

[0015] [Figure 1] 1 is a front view showing a first example of an embodiment of a spacer for waterproof protective concrete according to the present invention. [Diagram 2] FIG. 2 is a plan view of the spacer shown in FIG. [Diagram 3] FIG. 2 is a side view of the spacer shown in FIG. [Figure 4] FIG. 2 is a bottom view of the spacer shown in FIG. [Diagram 5] XX cross-sectional view of FIG. [Figure 6] FIG. 2 is an explanatory diagram showing a state in which the spacers shown in FIG. 1 are stacked one on top of the other. [Figure 7] FIG. 2 is an explanatory diagram showing a state in which a wire mesh is arranged on the spacer shown in FIG. [Figure 8] 2 is an explanatory diagram showing a state in which a wire mesh arranged on the spacer shown in FIG. 1 is bound to the spacer with a wire or the like. FIG. [Figure 9] FIG. 2 is a front view showing a second embodiment of the spacer for waterproof protective concrete according to the present invention. [Figure 10] FIG. 10 is an explanatory diagram showing a state in which the spacer shown in FIG. 9 is divided into minimum unit spacers. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a waterproof protective spacer for concrete according to the present invention will be described in detail with reference to the drawings. Figures 1 to 7 show a first example of an embodiment of a spacer for waterproof protective concrete, where Figure 1 is a front view of the first example spacer, Figure 2 is a plan view of the spacer shown in Figure 1, Figure 3 is a side view of the spacer shown in Figure 1, Figure 4 is a bottom view of the spacer shown in Figure 1, Figure 5 is a cross-sectional view along line XX in Figure 1, Figure 6 is an explanatory diagram showing the spacer shown in Figure 1 stacked one on top of the other, Figure 7 is an explanatory diagram showing a wire mesh arranged on the spacer shown in Figure 1, and Figure 8 is an explanatory diagram showing the wire mesh arranged on the spacer shown in Figure 1 tied to the spacer with wire or the like.

[0017] The first example spacer 1 comprises an elongated plate-shaped seat 2 whose underside is a contact surface that abuts against the roof slab, and a plate-shaped support part 4 on the upper surface of the plate-shaped seat 2, which is located approximately in the center of the width of the plate-shaped seat 2, rises to a predetermined height, extends along the longitudinal direction of the plate-shaped seat 2, and supports the wire mesh A at its upper edge 3.

[0018] In the first example, the plate-shaped seat portion 2 is rectangular, and its longitudinal length is sufficient to support the wire mesh A in a stable manner. Moreover, the height from the bottom surface of the plate-like seat portion 2 to the upper side 3 of the plate-like support portion 4 (the height of the spacer 1) is set according to the thickness of the waterproof protective concrete to be poured.

[0019] The thickness of waterproofing concrete is generally 60 to 120 mm depending on the use of the building and the required water gradient, etc., and the height of the spacer to ensure the wire mesh height (cover thickness) required for such a thickness of waterproofing concrete is generally, for example, 30 mm for a waterproofing concrete thickness of 60 mm, and 60 mm for a waterproofing concrete thickness of 120 mm.

[0020] In the first example, the height from the bottom surface of the plate-shaped seat portion 2 to the upper edge 3 of the plate-shaped support portion 4, i.e., the height of the spacer 1, is set to 30 mm, which corresponds to the general minimum thickness of 60 mm for waterproof protective concrete.

[0021] Additionally, a plurality of protrusions 5 are provided on the upper side 3 of the plate-shaped support portion 4 at intervals in the longitudinal direction, and a fitting groove 6 is formed on the underside of the plate-shaped seat portion 2 into which the protrusions 5 can fit.

[0022] In the first example, a reinforcing plate 7 that supports the side surface of the plate-shaped support part 4 is provided on the upper surface of the plate-shaped seat part 2. The reinforcing plate 7 is provided so as to sandwich the side surface of the plate-shaped support part 4 from both sides, and has an upper edge 8 at the same height as the plate-shaped support part 4.

[0023] In the first example, a wire mesh binding hole 9 is formed in the plate-shaped support part 4. The size and shape of the wire mesh binding hole 9 are not particularly limited as long as a wire or the like for binding the wire mesh A to the plate-shaped support part 4 can be passed through the wire mesh binding hole 9.

[0024] In the first example, the plate-shaped seat portion 2 is formed with holes 10 for reducing weight and saving material.

[0025] The spacer 1 constructed as above is, in the first example, integrally molded from plastic.

[0026] The spacer 1 configured in this manner comprises an elongated plate-shaped seat portion 2, the underside of which is an abutment surface that abuts against the roof slab, and a plate-shaped support portion 4 on the upper surface of the plate-shaped seat portion 2, which is located approximately in the center of the width of the plate-shaped seat portion 2, rises to a predetermined height, and is provided along the longitudinal direction of the plate-shaped seat portion 2, and supports the wire mesh A at its upper edge 3. The upper edge 3 of the plate-shaped support portion 4 is provided with a plurality of protrusions 5 spaced apart in the longitudinal direction, and the underside of the plate-shaped seat portion 2 is formed with a fitting groove 6 into which the protrusions 5 can fit. Therefore, by placing the underside of the plate-shaped seat portion 2 of one spacer 1 on the upper edge 3 of the plate-shaped support portion 4 of the other spacer 1 and fitting the protrusion 5 provided on the upper edge 3 of the plate-shaped support portion 4 of the one spacer 1 into the fitting groove 6 formed on the underside of the plate-shaped seat portion 2 of the other spacer 1, the one spacer 1 and the other spacer 1 can be assembled together vertically, and a composite spacer 1W of double height can be obtained (see Figure 6).

[0027] Therefore, by setting the height of the single spacer 1 to a height corresponding to the minimum height of the general thickness of waterproof protective concrete, one type of spacer can be used to accommodate the general thickness of waterproof protective concrete from the minimum thickness to the maximum thickness.

[0028] In the first example, the height from the bottom surface of the plate-shaped seat portion 2 to the upper edge 3 of the plate-shaped support portion 4, i.e., the height of the spacer 1, is set to 30 mm, which corresponds to the general minimum thickness of 60 mm for waterproof protective concrete. Therefore, by stacking one spacer 1 on top of another spacer 1, the height of the composite spacer 1W becomes 60 mm, and it can also be used when the thickness of the waterproof protective concrete is 120 mm.

[0029] In addition, the protrusion 5 provided on the upper edge 3 of the plate-shaped support part 4 abuts against the wire mesh A arranged on the upper edge 3 of the plate-shaped support part 4, preventing the wire mesh A from sliding laterally.

[0030] In addition, in the first example, a reinforcing plate 7 which supports the side of the plate-shaped support part 4 is provided on the upper surface of the plate-shaped seat 2, so that it can withstand the weight of the waterproof protective concrete when poured, support the wire mesh A, and reliably maintain the height of the wire mesh A.Furthermore, since the reinforcing plate 7 has an upper edge 8 of the same height as the plate-shaped support part 4, when the underside of the plate-shaped seat 2 of another spacer 1 is placed on the upper edge 3 of the plate-shaped support part 4 of one spacer 11, the underside of the plate-shaped seat 2 of the other spacer 1 located above abuts and is supported by the upper edge 8 of the reinforcing plate 7 which supports the side of the plate-shaped support part 4 of the one spacer 1 located below, so that the one spacer 1 and the other spacer 1 can be assembled together in a stable vertical state.

[0031] In addition, in the first example, a hole 9 for binding the wire mesh is formed in the plate-shaped support part 4, so that by passing a wire 11 through the hole 9 for binding the wire mesh A arranged on the upper edge 3 of the plate-shaped support part 4 and binding it to the plate-shaped support part 4, the positioning of the wire mesh A on the upper edge 3 of the plate-shaped support part 4 can be reliably maintained.

[0032] FIG. 9 is a front view showing a second embodiment of a spacer for waterproof protection concrete according to the present invention, and FIG. 10 is an explanatory diagram showing the state in which the spacer shown in FIG. 9 has been divided into minimum unit spacers.

[0033] The spacer 100 of the second example is formed by disconnectably connecting the longitudinal ends of a plurality of minimum unit spacers 100a, each of which constitutes an independent spacer, with a connecting piece 101.

[0034] The configuration of the minimum unit spacer 100a is basically the same as that of the spacer 1 of the first example. The difference between the minimum unit spacer 100a and the spacer 1 of the first example is the longitudinal length, and the longitudinal length of the minimum unit spacer 100a is set to a length that can be used in a narrow space, and is set to be shorter than, for example, the spacer 1 of the first example, which is used without considering a narrow space.

[0035] In the second example, two minimum unit spacers 100a are connected, but three or more may be connected. The other configurations are the same as those of the spacer 1 in the first example, so the same reference numerals as in the first example are used and the description thereof is omitted.

[0036] According to the second example spacer 100 configured in this manner, the longitudinal ends of a plurality of minimum unit spacers 100a, which constitute independent spacers individually, are connected by connecting pieces 101 in a cuttable manner. Therefore, if the space to support the wire mesh A is narrow, the connecting pieces 101 can be cut to divide the spacer 100 into minimum unit spacers 100a (see Figure 9), making it possible to use short minimum unit spacers 100a to accommodate narrow spaces. The other functions and effects are the same as those of the spacer 1 in the first example, so the same reference numerals as in the first example are used and the description thereof is omitted. [Explanation of symbols]

[0037] 1 Spacer 1W Composite Spacer 2 Plate-shaped seat 3. Top 4 Plate-shaped support 5 protrusions 6 Fitting groove 7 Reinforcement plate 8 Top 9 Wire mesh binding hole 10 Punching hole 11 Wire 100 Spacer 100a minimum unit spacer 101 Connection piece A Wire Mesh

Claims

1. A spacer for waterproof protective concrete for maintaining the height of a wire mesh embedded in waterproof protective concrete poured on a roof slab of a building, comprising: A spacer for waterproof protective concrete comprising: an elongated plate-shaped seat having an underside which is an abutment surface that abuts against a roof slab; and a plate-shaped support portion on the upper surface of the plate-shaped seat, which is located approximately in the center of the width of the plate-shaped seat, rises to a predetermined height, and is provided along the longitudinal direction of the plate-shaped seat, supporting a wire mesh at its upper edge; a plurality of protrusions are provided on the upper edge of the plate-shaped support portion at intervals in the longitudinal direction, and the underside of the plate-shaped seat is formed with fitting grooves into which the protrusions can fit.

2. A waterproof protective concrete spacer as described in claim 1, characterized in that a reinforcing plate is provided on the upper surface of the plate-shaped seat portion to support the side of the plate-shaped support portion, and the reinforcing plate has an upper edge at the same height as the plate-shaped support portion.

3. 3. The waterproof protective concrete spacer according to claim 1, wherein the plate-shaped support portion is formed with holes for binding a wire mesh.

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