JP4921950B2 - Architectural formwork and its assembly tie - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a building form made of an external heat insulating form and an assembly tie used directly in the concrete standing space in order to form a concrete frame.

Conventionally, in a building, the building formwork for molding the concrete frame is stood parallel to each other with a concrete placement space, and the heat insulation formwork inside and outside is integrated with the heat insulation formwork. It is known that it is composed of a plurality of brace-like assembly ties that are bridge-coupled to each other (see Patent Document 1).
JP 2004-76396 A

  By the way, the architectural form disclosed in Patent Document 1 includes a bar member inserted between joint surfaces of heat insulation panels stacked in a vertical direction in a plurality of stages, and connects the upper and lower heat insulation panels. The outer heat-insulating formwork is built in, and the corresponding bar members of the inner and outer heat-insulating formwork are bridge-connected by an assembly tie. Therefore, a gap corresponding to the sum of the thickness of the bar member and the thickness of the assembly tie is formed on the inner surface side (concrete casting side) between the joint surfaces of the upper and lower thermal insulation panels joined to each other (see above). When the concrete is cast and a part of the cast concrete enters the gap, a heat insulation defect is generated in the inner and outer heat insulation molds. In addition to being damaged, there was a problem that the insulation between the upper and lower thermal insulation panels was poor and the thermal insulation panel collapsed due to the pressure when placing concrete.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a novel architectural formwork and an assembly tie used directly in the formwork so as to solve the above-described problems.

In order to achieve the above object, the invention according to claim 1 is characterized in that there are a plurality of outer heat-insulating molds stacked in a plurality of stages in the vertical direction, while standing in parallel with each other in a concrete placement space. A plurality of connecting bars that are inserted between the heat insulating panels and the joint surfaces of the upper and lower heat insulating panels and respectively connect the upper and lower heat insulating panels, and corresponding connecting bars of the inner and outer heat insulating molds. In an architectural form formed by connecting together a plurality of assembly ties,
The assembly tie has an intermediate portion and both bent end portions that are bent at substantially right angles from both ends of the intermediate portion, and the both bent end portions are inserted into insertion holes formed in the connecting bar. In addition, a concave portion is formed in a portion of the straight portion sandwiched between the joint surfaces of the upper and lower thermal insulation panels, and the protrusions formed on the joint surface of the thermal insulation panel are seated closely in the concave portion. It is characterized by.

  In order to achieve the above object, according to a second aspect of the present invention, in the first aspect of the present invention, of the joint surfaces of the upper and lower thermal insulation panels that are joined together, the directly joined portions are in close contact with each other. It is characterized by being.

  Furthermore, in order to achieve the above-mentioned object, the invention according to claim 3 is an assembly tie used directly for a building form, which is formed in a shape of a shaving with a metal wire, and has a straight intermediate portion. And a concave portion having a flat portion thinner than the vertical thickness of the intermediate portion is formed in a portion near the left and right end portions of the intermediate portion. It is characterized by.

  According to the inventions described in the claims, since the gap formed between the joint surfaces of the heat insulation panels to be joined to each other can be made as small as possible, the cast concrete enters between the joint surfaces. Can be reduced as much as possible, and the heat insulation defect of the heat insulation form can be greatly reduced to enhance the heat insulation. In addition, since the contact between the joint surfaces of the upper and lower thermal insulation panels is improved, the thermal insulation panel can be prevented from falling and the construction accuracy of the building formwork can be greatly improved.

  In particular, according to the invention described in claim 2, the joining of the joint surfaces of the upper and lower thermal insulation panels is further improved, and the thermal insulation panel can be prevented from falling down more reliably.

  Further, according to the invention described in claim 3 in particular, the assembly tie used for the building form can be provided at a low cost because it is constructed by adding a slight improvement to the conventional one.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on examples of the present invention illustrated in the accompanying drawings.

  1 is a perspective view of a heat insulating panel and an assembly tie, FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 1, FIG. 3 is an enlarged view of a portion surrounded by an imaginary line in FIG. 3 is a cross-sectional view taken along line 4-4 in FIG. 3, FIG. 5 is an enlarged view of a portion surrounded by an imaginary line 5 in FIG. 1, and FIG. 6 is a cross-sectional view of the assembled formwork.

  1-4, the heat insulation panel 1 as a formwork panel is formed in the shape of a horizontally-long rectangular plate by a hard heat insulation synthetic resin material, The connection bar J mentioned later is formed in the upper end surface 1u. Is fixed over the entire length of the insulation panel.

  The heat insulation panel 1 has a horizontally long rectangle made of a hard foamed synthetic resin material such as polystyrene or polyurethane which is highly heat-insulating and lightweight. Both the outer surface 1o and the inner surface 1i of the heat insulation panel 1 are formed as flat surfaces. Moreover, the slit 2 is formed in the intermediate part of the thickness direction in the upper end surface 1u and the lower end surface 1d used as the joining surface of the heat insulation panel 1 over the full length. Further, a concave groove 3 is formed in parallel to the slit 2 and a ridge 4 is formed at the lower end on the inner surface 1 i side of the heat insulating panel 1 near the inner surface 1 i on the lower end surface.

1-4, the connection bar J is formed of a metal plate or a hard synthetic resin plate, has a length substantially the same as the horizontal length of the heat insulation panel 1, and is formed in a flat plate shape. A horizontal portion 10 and a horizontal insertion portion 11U, 11D having a horizontal insertion portion 11U and 11D are formed in a vertical direction symmetrically and vertically from one end (the left end in FIGS. 2 and 3) of the horizontal portion 10, and have a transverse T-shaped cross section. The width thereof is shorter than the thickness of the heat insulating panel 1. The thickness t ₁ of the upper and lower insertion portions 11U and 11D is formed to be slightly thicker than the thickness t ₂ of the horizontal portion 10. Further, a plurality of insertion holes 14 are formed in the horizontal portion 10 at intervals in the longitudinal direction, and bent portions 20e of an assembly tie 20 described later are inserted into the insertion holes 14 respectively. Connected.

  As clearly shown in FIGS. 2 and 3, the horizontal portion 10 of the heat insulation panel 1 is formed to be narrower than the thickness width of the heat insulation panel 1, and when the heat insulation panel 1 is stood up, It is sandwiched between the lower end surface 1d. The upper and lower insertion portions 11U and 11D are integrally formed with serrated retaining teeth 11t at their tips and inserted into the slit 2 of the heat insulating panel 1 so that the retaining teeth 11t are Biting into the slit 2 is prevented from coming out.

  The connecting bar J is previously fixed to the joint surface of the heat insulating panel 1, that is, the upper end surface 1u at a factory or the like. In this fixed state, as shown in FIG. 3, one lower insertion portion 11 </ b> D of the connecting bar J is inserted and fixed in the slit 2 of the heat insulation panel 1, and the horizontal portion 10 is the upper end surface 1 u of the heat insulation panel 1. Abut. In this case, the heat insulation panel 1 and the connection bar J are adhered by an adhesive.

  As mentioned above, the heat insulation panel 1 which fixed the connection bar J to the upper end surface used as a joint surface is conveyed by the construction site etc., and is used for the assembly | attachment of the formwork M for construction.

  As shown in FIG. 6, the heat insulating panels 1, 1 standing in parallel with each other in the concrete placement space S are integrally connected by a plurality of assembly ties 20.

  As shown most clearly in FIG. 5, the assembly tie 20 is formed in a “frayed” shape as a whole by a metal wire having a circular cross section such as an iron wire, and has a straight intermediate portion 20 n and an intermediate portion 20 n thereof. The bent end portions 20e and 20e are bent at substantially right angles from both ends thereof, and the ends of the bent end portions 20e and 20e are cut obliquely and sharply formed. The insertion bar 14 of the connecting bar J is easy to insert. Further, a portion of the intermediate portion 20n of the assembly tie 20 near the bent end portion 20e, that is, the upper and lower end surfaces of the upper and lower thermal insulation panels 1, 1, that is, the portion sandwiched between the joint surfaces 1u and 1d is A concave portion 22 having a flat portion 21 thinner than the upper and lower thickness of the intermediate portion 20n is integrally formed. When the upper thermal insulation panel is joined to the lower thermal insulation panel 1, the ridges 4 formed on the lower end of the inner side surface 1 i of the upper thermal insulation panel are seated closely in the recess 22, and the upper and lower thermal insulation panels are seated. A gap d between the joining surfaces 1u and 1d of the panels 1 and 1 is narrowed.

  Further, on the inner side (intermediate part side) of the outer peripheral surface of the base portion of both bent end portions 20e, 20e, a raised portion 30 that protrudes outward from the outer peripheral surface is integrally projected. In this embodiment, the raised portion 30 is protruded into the outer peripheral portion of a conical recess 31 formed by punching.

  Note that the processing of the raised portion 30 may be performed by other processing means.

  In order to connect the assembly tie 20 to the heat insulation panel 1, as shown in FIG. 2, one side of the assembly tie 20 is inserted into the insertion hole 14 of the connection bar J fixed in advance to the upper end surface of the heat insulation panel 1 from above. Are inserted and connected. At this time, since the raised portion 30 of the bent end portion 20e is caught by the edge of the insertion hole 14, the assembly tie 20 is pushed from above or hit. As a result, the raised portion 30 penetrates the insertion hole 14 and is engaged with the edge of the insertion hole 14, so that the assembly tie 20 can be securely inserted and connected to the insertion hole 14. With this pressure, the fastening member 20 is prevented from being lifted from the insertion hole 14 and coming out.

  Next, with reference to FIG. 6, a procedure for assembling the building formwork M using the heat insulating panel 1, the connecting bar J, and the assembly tie 20 will be described.

  The building formwork M is constituted by the heat insulating formwork Mi and Mo on the outside, while the concrete placement space S exists on the foundation and is stood parallel to each other.

  In the following description, a symbol (U) is added to the upper thermal insulation panel 1 and a symbol (D) is added to the lower thermal insulation panel 1.

  When the upper thermal insulation panel 1 (U) is built and connected to the lower thermal insulation panel 1 (D), the connection bar J is fixed in advance, and the inner and outer lower thermal insulation panels 1 (D) and 1 (D) Are held in a vertical state, and the bent end portions of the assembly tie 20 are inserted into the plurality of insertion holes 14 and 14 of the connecting bars J and J of both the heat insulating panels 1 (D) and 1 (D) as described above. 20e is inserted and connected. Thereby, the inner and outer lower thermal insulation panels 1 (D) and 1 (D) are firmly held in a vertical state by opening the concrete placement space S.

  Next, the upper thermal insulation panel 1 (U) is stood on the lower thermal insulation panel 1 (D). At this time, as shown in FIG. 3, the slit 2 of the upper thermal insulation panel 1 (U) is inserted into and fixed to the upper insertion portion 11U of the connecting bar J, and at the same time, the concave groove of the upper thermal insulation panel 1 (U). 3, the end of the intermediate portion 20 n of the assembly tie 20 is received, and the protrusion 4 of the upper thermal insulation panel 1 (U) is seated closely in the recess 22 having the thin flat portion 21 of the assembly tie 20. Is done. As a result, even if the assembly tie 20 is sandwiched between the joint surfaces 1d and 1u of the lower heat insulation panel 1 (D) and the upper heat insulation panel 1 (U), the gap d ( 3 and 4) can be reduced as much as possible, and the penetration of the cast concrete between the joint surfaces 1d and 1u can be reduced as much as possible. Further, of the joint surface 1u of the lower thermal insulation panel 1 (D) and the joint surface 1d of the upper thermal insulation panel 1 (U), a directly contacting portion z (a portion where no connecting bar exists, see FIG. 3) is in close contact. Therefore, in combination with the above-described structure, the joint between the lower thermal insulation panel 1 (U) and the upper thermal insulation panel 1 (U) becomes extremely good, and the upper thermal insulation panel is placed on the thermal insulation panel 1 (D). 1 (U) can be firmly and stably supported, and the upper heat insulating panel 1 (U) can be prevented from falling even when receiving side pressure from the cast concrete.

  Further, when the ready-mixed concrete is placed, the assembly tie 20 connecting the inner and outer heat insulation panels 1 and 1 is subjected to a lifting force, that is, a pulling direction force by the ready-mixed concrete placing pressure. Since the raised portions 30, 30 processed into both bent end portions 20 e, 20 e of the member 20 are engaged with the insertion holes 14, 14 of the connecting pieces 13, 13, the tightening member 20 is pressed with green concrete. There is no floating due to the installation pressure.

  After completion of the molding of the concrete frame, the inner and outer heat insulation panels 1 can be used as heat insulation building materials as they are, and in that case, the flat outer surface 1o has a wet exterior material such as mortar or tile. It is easy to stack the dry exterior materials. Further, the inner and outer heat insulating panels 1 can be disassembled from the concrete frame and reused as a normal formwork panel.

  As mentioned above, although the Example of this invention was described, this invention is not limited to the Example, A various Example is possible within the scope of the present invention.

Perspective view of insulation panel and assembly tie Sectional view along line 2-2 in FIG. Enlarged view of the phantom line encircled portion indicated by the arrow 3 in FIG. 4 is a sectional view taken along line 4-4 of FIG. Enlarged view of the phantom line encircled portion in FIG. Cross section of assembled formwork

Explanation of symbols

1 ··· Insulation panel 4 ··· Projection 14 ················ 20 ..Assembly tie 20n ..... Intermediate portion 20e ..... Folded end 21 ..... Flat portion 22 .. ······································· J ... Concrete placement space

Claims (3)

Inside the concrete placement space (S) and standing in parallel with each other, the outer heat insulation formwork (Mi, Mo), a plurality of heat insulation panels (1) loaded in a plurality of stages in the vertical direction, and each A plurality of connecting bars (J) that are inserted between the joint surfaces (1u, 1d) of the upper and lower thermal insulation panels (1, 1) and respectively couple the upper and lower thermal insulation panels (1, 1); In the architectural form formed by integrally connecting the corresponding connecting bars (J) of the inner and outer heat-insulating formwork (Mi, Mo) by a plurality of assembly ties (20),
The assembly tie (20) has an intermediate portion (20n) and both bent end portions (20e, 20e) bent at substantially right angles from both ends of the intermediate portion (20n). (20e, 20e) are inserted into the insertion holes (14) drilled in the connecting bar (J), and the joining surface of the upper and lower heat insulation panels (1, 1) of the straight portion (20n) A recessed portion (22) is formed in a portion sandwiched between (1u, 1d), and the protruding portion (4) formed on the joint surface (1d) of the heat insulating panel (1) is seated densely in the recessed portion (22). Architectural formwork characterized by being made.   The part (z) directly joined among the joint surfaces (1u, 1d) joined to each other of the upper and lower thermal insulation panels (1, 1) is in close contact with each other. Architectural formwork. An assembly tie (20) used directly in a building formwork, which is formed of a metal wire in the shape of a faucet and bent from both ends of the straight intermediate part (20n) and the intermediate part (20n) The left and right end portions (20e, 20e), and the intermediate portion (20n) near the left and right end portions (20e, 20e) have a flat portion (21 that is thinner than the vertical thickness of the intermediate portion (20n)). An assembly tie for a building form, characterized in that a recess (22) is formed.

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