Substrate

Abstract

This invention provides a base material that can reduce the labor costs when installing planar members on a concrete cast structure. [Solution] The base material is attached to the horizontal bars of the sacrificial formwork, which extend laterally along the surface portion of the concrete cast wall of the building. The base material makes it possible to fasten the planar member covering the sacrificial formwork and the concrete cast body with a push-in type fastener. The base material has a holding part that holds the push-in portion of the fastener and a clamping part that clamps the horizontal bars from above and below, thereby attaching the base material to the sacrificial formwork.

Description

Technical Field

[0001] The present disclosure relates to a base material.

Background Art

[0002] In some buildings such as houses, the wall frame is formed by a concrete cast body. In such a building, the inner and outer surfaces of the wall frame are often covered with planar members. The "planar member" may include members used exclusively for functional purposes, such as heat insulating materials, sound insulation materials, refractory materials, or moisture-permeable waterproof sheets. The "planar member" may include members used exclusively for aesthetic purposes, such as decorative panels and wallpaper.

[0003] As a technology of providing a planar member on a frame formed of a concrete cast body, for example, the prior art disclosed in the following Patent Document 1 is known. In this prior art, a heat insulating material, which is a planar member spreading along the outdoor side surface of a concrete frame of a building, is attached by an adhesive.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Summary of Invention

Problem to be Solved by the Invention

[0005] In the above prior art, when attaching the planar member (heat insulating material), adhesive coating work, pressure bonding work of the planar member, and curing for completely hardening the adhesive are required. With respect to this prior art, there has been a demand for reducing the operation cost when providing the planar member (heat insulating material) on the concrete cast body.

[0006] The present disclosure provides a base material capable of reducing the operation cost when providing a planar member on a concrete cast body. [Means for solving the problem]

[0007] According to one aspect of this disclosure, a base material is provided that is attached to a horizontal bar extending laterally along either the inner or outer surface portion of a concrete cast body constituting a building wall. Here, the horizontal bar is part of a sacrificial formwork that is attached to and integrated with the aforementioned surface portion on one side. The base material enables fastening of a planar member covering the sacrificial formwork and the concrete cast body from the aforementioned one side using a snap-in fastener. The base material includes a holding portion that covers the mounting position of the base material on the horizontal bar from the aforementioned one side and allows the insertion of the fastener's insertion portion to be held in place. The base material also includes a clamping portion provided in the holding portion that clamps the horizontal bar from above and below, thereby attaching the base material to the sacrificial formwork.

[0008] Concrete structures are generally produced by pouring fresh concrete into a space partitioned by formwork and allowing it to cure until it hardens. Among the formwork used in this process, there is a type called "sacrificial formwork" that remains in place on the concrete structure even after curing. The sacrificial formwork is attached to one side of the surface of the concrete structure and becomes integrated with it. From this perspective, by attaching the base material to the horizontal bars of the sacrificial formwork, the base material can be positioned vertically and supported on the concrete structure. Furthermore, by fastening the planar member to the holding part of the base material with a slip-in fastener, the planar member can be installed on the concrete structure without the need for an attachment step. Therefore, from this perspective, the labor cost of installing the planar member on the concrete structure can be reduced.

[0009] In other respects, the base material is attached to the horizontal bar of a disposable formwork, which has a groove opening on one side and extending vertically, intersecting the horizontal bar. When attached to the horizontal bar, the base material has an engaging portion that fits into the groove and engages with the groove.

[0010] Some disposable formwork has a formwork plate portion made of sheet metal (or wire mesh formed from sheet metal). This type of disposable formwork may have wavy projections on its formwork plate portion that protrude toward the concrete body. In this case, a groove is formed on the side opposite to the wavy projection made of sheet metal (the side exposed to the outside). From this perspective, the groove of the disposable formwork that adheres to the surface of the concrete body can be used to position the base material laterally.

[0011] From another perspective, the engaging portion has a lower extension that extends from the holding portion to the region below the clamping portion and engages with the groove, causing a portion of the external force applied to the holding portion to be supported by the groove.

[0012] In the configuration of this disclosure, in which the base material is attached to the horizontal rail by clamping the horizontal rail from above and below with the clamping portion, an external force such as a load acting on the holding portion of the base material may act in such a way that it tilts the holding portion downward. In this case, according to the above aspect, by supporting a portion of the external force such as a load acting on the holding portion of the base material with the groove portion of the sacrificial formwork, it is possible to suppress the downward tilting of the holding portion to which the planar member is fastened. [Effects of the Invention]

[0013] According to this disclosure, the labor costs when installing planar members on a concrete structure can be reduced. [Brief explanation of the drawing]

[0014] [Figure 1] This is a cross-sectional view of a key part of a wall in which a base material according to one embodiment is used. [Figure 2] This is an enlarged view of part II of Figure 1. [Figure 3] This is a cross-sectional view taken along line III-III in Figure 2. [Modes for carrying out the invention]

[0015] The following describes the forms for implementing this disclosure, using drawings.

[0016] First, the configuration of a wall 10 to which a base material 30 according to one embodiment is applied will be described using Figures 1 to 3. As shown in Figure 1, this wall 10 constitutes the perimeter of a building 90 and is a structural wall that demarcates the building-side area 90A from the outside-side area 90B. In this specification, the wall 10 is described as the exterior wall of the first floor of the building 90, but it is clear that an embodiment similar to wall 10 can be applied to the exterior walls of the second floor and above of the building (not shown). Since wall 10 is an exterior wall, it is clear that "building side" in this embodiment is synonymous with "indoor side," and similarly, "outside side" is synonymous with "outdoor side."

[0017] As shown in Figure 1, the wall 10 comprises reinforcing bars 10A, a concrete cast body 11, a formwork assembly 20, and insulation material 12. The formwork assembly 20 comprises a pair of sacrificial formwork 21 and a plurality of separators 20A.

[0018] The disposable formwork 21 has a structure in which one side of a rectangular frame 22 is covered with a wire mesh 23 that functions as a "formwork." As shown in Figure 3, the frame 22 has a structure in which the end faces of multiple horizontal bars 22B, which are stretched horizontally between multiple vertical bars 22A, are butted against the sides of multiple vertical bars 22A that extend in the vertical direction, and these are rigidly joined to each other. In this embodiment, the vertical bars 22A and horizontal bars 22B are each round bars.

[0019] The wire mesh 23 is an expanded metal of the type called "Riblas C", which is obtained by expanding and stretching a long sheet metal in the width direction, the long sheet metal being formed with ribs bent to form ridges extending in the longitudinal direction and notches inclined in the width direction. In the wire mesh 23, as shown in FIG. 2, the ribs of the sheet metal constitute ridge portions 23A bent to form ridges protruding to one side in the out-of-plane direction of the wire mesh 23, and groove portions 23B formed on the opposite side corresponding to the protrusion of the ridge portions 23A. The wire mesh 23 is welded to the frame 22 with the groove portions 23B facing the frame 22 side. The wire mesh 23 is arranged such that the ridge portions 23A and the groove portions 23B extend in a direction parallel to the vertical bars 22A of the frame 22 (the vertical direction, see FIG. 3).

[0020] As shown in FIG. 1, the reinforcing bar 10A is integrated with dowels 91A protruding upward from a foundation 91 of a building 90. The formwork assembly 20 has a configuration in which a pair of permanent formworks 21 are arranged to partition a building-side region 90B and an outside region 90A in a spaced state with these wire meshes 23 facing each other. In the present embodiment, the reinforcing bars 10A are "double reinforcement" in which two layers of reinforcing bars arranged in a grid shape are stacked. Further, the pair of permanent formworks 21 are arranged so as to sandwich the reinforcing bars 10A from both the inner and outer sides (indoor side and outdoor side), and the horizontal bars 22B thereof are connected to each other by rod-shaped separators 20A inserted through the grid of the reinforcing bars 10A, thereby suppressing a change in the distance between the permanent formworks 21.

[0021] The concrete poured body 11 occupies the region between the pair of permanent formworks 21, makes the reinforcing bars 10A buried in concrete, and makes the wire mesh 23 of each permanent formwork 21 adhere to the concrete. In other words, the concrete poured body 11 is provided with an adhered structure 11B in which the wire mesh 23 of the permanent formwork 21 is adhered and integrated to the surface portions 11A on the outside side and the building side, respectively. In this adhered structure 11B, as shown in FIG. 2, the ridge portions 23A of the wire mesh 23 protrude toward the concrete poured body 11 side. The groove portions 23B of the wire mesh 23 open to the surface portion 11A of the concrete poured body 11.

[0022] Further, the frame 22 of each permanent formwork 21 protrudes toward the side opposite to the concrete-placed body 11 relative to the wire mesh 23 (the outer side in the case of a permanent formwork 21 positioned on the outer side (hereinafter also referred to as "outer-side permanent formwork 21A"), and the building side in the case of a permanent formwork 21 positioned on the building side). The vertical beam 22A and horizontal beam 22B of each frame 22 each extend along the surface portion 11A.

[0023] The heat insulating material 12 is provided along the outer-side permanent formwork 21A, and covers the outer-side permanent formwork 21A and the concrete-placed body 11 from the outer side. Thereby, the heat insulating material 12 functions as a heat insulating material in an external heat insulation structure. In the present embodiment, the heat insulating material 12 is a planar (plate-shaped) foam member that is attached to the frame 22 of the outer-side permanent formwork 21A via the base material 30 and the fastener 12A.

[0024] As shown in Fig. 2, the base material 30 includes a holding portion 31, a clamping portion 30A, and an engaging portion 32. The holding portion 31 takes, as an attachment position 30B, a portion of the outer-side permanent formwork 21A where the horizontal beam 22B of the frame 22 intersects three-dimensionally with the groove 23B of the wire mesh 23, and covers this attachment position 30B from the outer side. In the holding portion 31 of the present embodiment, a clamping portion 30A, an engaging portion 32 which will be described later, and a mark 31A indicating the position of the attachment position 30B are provided in the form of an uneven pattern on the surface on the opposite side (outer side) from the attachment position 30B.

[0025] The clamping portion 30A is provided so as to extend in the lateral direction at the central portion of the surface on the frame 22 side of the holding portion 31. The clamping portion 30A clamps the horizontal beam 22B at the attachment position 30B from the vertical direction, thereby bringing the base material 30 into an attached state where it is attached to the outer-side permanent formwork 21A. In other words, the base material 30 can be attached to the horizontal beam 22B of the outer-side permanent formwork 21A by clamping the horizontal beam 22B from the vertical direction via the clamping portion 30A.

[0026] The engaging portion 32 is a plate-like structure provided on the frame 22 side surface of the holding portion 31, extending vertically in the central portion when viewed laterally. The engaging portion 32 includes a lower extension portion 32B that extends from the holding portion 31 to the area below the clamping portion 30A, and an upper extension portion 32A that extends to the area above the clamping portion. In the above-described mounting state, the upper extension portion 32A and the lower extension portion 32B of the engaging portion 32 each enter into the groove portion 23B of the external-side sacrificial formwork 21A and engage with this groove portion 23B.

[0027] The fastener 12A is a push-in type fastener that fastens the insulation material 12, which is a planar member, to the base material 30, thereby attaching the insulation material 12 to the exterior-side formwork 21A. In Figures 2 and 3, the fastener 12A is depicted as an "anchor nail". However, the fastener 12A can be any type of push-in fastener of an appropriate choice, such as a screw-type fastener. The fastener 12A penetrates the insulation material 12 and the holding portion 31 of the base material 30 at its insertion portion 12B. The holding portion 31 allows the insertion of the insertion portion 12B and holds this insertion portion 12B.

[0028] In the above configuration, the retaining portion 31 of the base material 30 may be subjected to external forces such as loads from fasteners 12A and structures directly or indirectly attached via fasteners 12A (for example, the insulation material 12 and the finishing structure described later). A portion of these external forces may act to tilt the retaining portion 31 downwards. In response to this, the lower extension portion 32B of the base material 30 prevents the retaining portion 31 from tilting downwards by supporting the external force acting to tilt the retaining portion 31 downwards in the groove portion 23B of the external formwork 21A.

[0029] Furthermore, various finishing structures can be provided on the interior and exterior (indoor and outdoor) sides of the wall 10. In Figure 1, a finishing structure 13 provided on the outdoor side of the wall 10 is shown, in which a mortar layer 13B with a fiberglass net 13A as a base covers the insulation material 12 from the outdoor side. Similarly, a finishing structure 14 provided on the indoor side of the wall 10 is shown, in which plasterboard 14B is bonded to the indoor formwork 21 using GL bond 14A as an adhesive.

[0030] With the aforementioned base material 30, by attaching the base material 30 to the horizontal bar 22B of the sacrificial formwork 21, the base material 30 can be positioned vertically and supported by the concrete cast body 11. Furthermore, by fastening the insulating material 12, which is a planar member, to the holding portion 31 of the base material 30 with a plug-in fastener 12A, the insulating material 12 can be installed on the concrete cast body 11 without the need for an adhesive step. Therefore, the base material 30 can reduce the labor cost when installing the insulating material 12 on the concrete cast body 11.

[0031] Furthermore, with the base material 30, the base material 30 can be positioned laterally by utilizing the groove 23B of the disposable formwork 21 that adheres to the surface portion 11A of the concrete cast body 11.

[0032] Furthermore, with respect to the base material 30, a portion of the external forces such as loads acting on the holding portion 31 of the base material 30 is supported by the groove portion 23B of the sacrificial formwork 21, thereby preventing the holding portion 31 to which the insulation material 12 is fastened from tilting downward.

[0033] Furthermore, the base material 30 makes it easier to identify the mounting position 30B, which will be covered by the holding part 31 when installing the base material 30, using the marker 31A, thereby enabling smoother installation of the base material 30.

[0034] The embodiments for implementing this disclosure have been described above by the first and second embodiments. However, it will be apparent to those skilled in the art that various substitutions, modifications, and alterations are possible without departing from the purpose of this disclosure. That is, embodiments for implementing this disclosure may include all substitutions, modifications, and alterations that do not depart from the spirit and purpose of the claims attached to this specification. For example, the following various embodiments can be implemented as embodiments for implementing this disclosure.

[0035] (1) The base material disclosed herein is not limited to those used to cover a concrete wall structure with an insulating material from the outside. The base material can be attached to the horizontal bars of a sacrificial formwork attached to either the inside or outside surface portion of the concrete wall structure, and can be used to provide various planar members on that side. Specific examples of "various planar members" include, for example, soundproofing materials, breathable waterproof sheets, fireproofing materials, decorative panels, and laminated assemblies made by laminating these. These planar members may cover the concrete wall structure from the outside (outdoor side) or from the building side (indoor side).

[0036] (2) In the base material disclosed herein, the specific configuration of the retaining portion can be appropriately changed according to the configuration of the fastener used to fasten the planar member. For example, when a planar member is fastened to the retaining portion of the base material with bolts, bolt holes of a diameter corresponding to these bolts may be provided in the retaining portion of the base material. [Explanation of Symbols]

[0037] 10 Walls 10A reinforcing bars 11. Concrete cast body 11A Surface part 11B Adhesive structure 12. Insulation material (planar component) 12A Fastener 12B Insertion part 13 Finishing Structure 13A Fiberglass Net 13B Mortar layer 14 Finishing Structure 14A GL Bond 14B Plasterboard 20 Formwork Assembly 20A Separator 21 Disposable formwork 21A External side disposable formwork (disposable formwork) 22 frames 22A Vertical bar 22B Crossbar 23 Wire mesh 23A Ridge 23B Groove 30 Underlayment 30A clamping part 30B Mounting position 31 Holding part 31A Landmark 32 Engaging part 32A Upper extension 32B Lower extension 90 buildings 90A area 90B area 91 Basics 91A Reinforcement bars

Claims

1. A horizontal bar attached to and integrated with the surface portion of either the inner or outer surface of a concrete cast body constituting the wall of a building, a base material that is attached to the horizontal bar extending laterally along the surface portion, and enables fastening of a planar member covering the disposable formwork and the concrete cast body from one side with a plug-in type fastener, A holding part that covers the mounting position of the base material on the horizontal rail from one side, allows the insertion of the fastener's insertion part and holds the insertion part, The holding portion is provided with a clamping portion that clamps the horizontal bar from above and below, thereby attaching the base material to the sacrificial formwork, It is equipped with Substrate material.

2. A base material according to claim 1, The groove portion, which is open on one side and extends in the vertical direction, is attached to the horizontal bar of the disposable formwork, which has a configuration that intersects with the horizontal bar. In the aforementioned mounting state, the engaging portion is provided that fits into the groove and engages with the groove. Substrate material.

3. A base material according to claim 2, The engaging portion includes a lower extension that extends from the holding portion to a region below the clamping portion and engages with the groove portion, thereby supporting a portion of the external force applied to the holding portion with the groove portion. Substrate material.

Images