JP4815157B2 - Sandwich panel and its manufacturing method - Google Patents

Description

The present invention relates to a sandwich panel used in an outer heat insulation method and a manufacturing method thereof .

Conventionally, for example, in order to increase the heat insulation effect of buildings such as steel structures, the outer heat insulation method is known, but in order to make the heat insulating material outside, there are problems with fire resistance, and it is difficult to perform exterior construction. Popularization is delayed in terms of cost. In recent years, a material in which the heat insulating material and the outer wall material are integrated has been proposed. As an example, a heat insulating material is sandwiched between concrete plates and joined with a truss bar at appropriate intervals (Patent Document 1). reference).
JP 2002-339451 A

  However, in the conventional sandwich panel, it takes time to finish the exterior, and further performance improvement is demanded in terms of heat insulation, and an improvement in adhesion strength and weight reduction as a panel are also required. Also in the manufacture of sandwich panels, there is a demand for a low cost that has good work efficiency and does not require labor. The sandwich panel according to the present invention has been proposed in order to solve such problems.

The gist for solving the above-mentioned problems of the sandwich panel according to the present invention is to achieve the object by sandwiching a heat insulating material with a prestressed concrete plate, and the prestressed concrete plate at the outer periphery of the heat insulating material In addition to being cut in parallel with the tension material, a hook for adhesion reinforcement is inserted, and a slit formed in a width to maintain the position in the longitudinal direction of the hook by a clamping force by friction with the hook is provided. The hooks are provided so as to pass through the slits and hook the hook portions to the prestressing tension members of the two prestressed concrete plates.
In addition, a joint for improving adhesion strength is provided on one side of the front and back surfaces of the heat insulating material, and a ventilation groove for preventing internal condensation is provided on the other side.

  The gist for solving the above-described problems of the sandwich panel manufacturing method according to the present invention and achieving the object is a sandwich panel manufacturing method in which a heat insulating material is sandwiched between prestressed concrete plates. After the concrete plate is formed by placing the tension material inside the concrete plate and then casting the concrete, the pre-stressed concrete plate is tensioned on the outer peripheral edge on the one precast concrete plate while the concrete is uncured. Heat insulation provided with a slit formed in a width that is cut in parallel with the material, and has a width formed so as to maintain a position in the longitudinal direction of the hook by clamping force due to friction with the hook. The material is laid, and the hook portion of the hook is moved to the one precast while the concrete is uncured. Inserted into a concrete plate, rotated and lifted appropriately, hooked the hook portion to the tendon material, attached the hook, moved the hook along the tendon material, inserted into the slit of the heat insulating material, and positioned, The other hook part of the hook is protruded on the heat insulating material, and a tension material is installed on the hook part protruding from the hook on the upper side of the heat insulating material to be tensioned, and concrete is placed on the heat insulating material. It is to be manufactured by forming the other precast concrete board.

According to the sandwich panel of the present invention and the manufacturing method thereof , since the hook is hooked to the prestressed tension member of the prestressed concrete plate sandwiching the heat insulating material, the adhesion strength of the concrete plate sandwiching the heat insulating material from both sides is improved. And unity is ensured. In addition, the hook hooked on the tendon does not shift or sink even when placing concrete. Furthermore, the cover thickness of the concrete can be made constant.
There is a hook positioning slit in the heat insulating material, and when the sandwich panel is manufactured at the factory due to the clamping force (frictional force caused by the clamping), the positional displacement or sinking of the hook due to concrete placement This improves the work efficiency.
Moreover, the said heat insulating material is provided with a joint, and the adhesion strength with concrete improves. Furthermore, the technical contribution as a ventilation groove which prevents internal dew condensation can also be expected by preventing the concrete placed in a part of the joint from entering.

  As shown in FIG. 1, the sandwich panel 1 according to the present invention is formed by sandwiching a heat insulating material 4 with prestressed concrete plates 2 and 3 in the center, penetrating the heat insulating material 4, and both the prestressed concrete plates 2. , 3 is formed by hooking a hook portion 5a on a prestressing tension material (PC steel wire) 6 of the both concrete plates.

  The two prestressed concrete (hereinafter referred to as PC) plates 2 and 3 sandwiching the heat insulating material 4 are, for example, a solid PC plate and a perforated PC plate (sometimes referred to as a spun cleat plate), or both holes. It is a perforated PC board. The holes 2a are a plurality of continuous through holes provided in a direction along the longitudinal direction of the plate in the lower PC plate 2 of the sandwich panel 1 shown in FIG. As a result, the weight can be reduced, and the heat insulation and sound insulation can be improved.

  For example, the PC board 2 as a base material has a thickness of about 100 to 200 mm, and the PC board 3 as a surface material has a thickness of 50 to 70 mm. The plate width is about 1000 mm, and the length is about 4.5 m to 9 m.

  The heat insulating material 4 is, for example, a polystyrene foam by an extrusion method as a heat insulating material. For example, the thickness is about 25 mm to 100 mm, and the width is about 1000 mm. This thermal conductivity is, for example, 0.024 kcal / mh ° C. or less. The thermal resistance of the sandwich panel 1 as the heat insulating material 4 is about 0.6 to 2.0 (mh ° C./kcal), and is set in accordance with the local environment.

  As shown in FIG. 2, the heat insulating material 4 is provided with a slit 4a for inserting the hook for positioning at the outer peripheral edge. The slit 4a is cut in parallel with the tension member 6 constructed and tensioned along the longitudinal direction.

  This is for facilitating the installation work of the hook 5. That is, the PC plate 2 is formed by placing concrete at a factory, and the hook 5 is inserted into the concrete of the PC plate 2 with the hook portion 5a parallel to the tension material 6 while the concrete is uncured. Then, the hook 5 is rotated approximately 90 degrees so that the tip portion of the hook portion 5a faces the tendon 6 side.

  Then, by pulling up the hook 5, the hook portion 5 a is hooked on the tension material 6 of the PC plate 2. The hook 5 is moved in the longitudinal direction along the tendon 6 as it is, and the straight bar portion 5b of the hook 5 is inserted into the slit 4a. Thereby, the hook part 5a of the upper part of the hook 5 is maintained by the clamping force of the said slit 4a. The hook 5 is installed at a required location over the longitudinal direction. Therefore, the width of the slit 4a is made thinner than the diameter of the hook 5 so as to exert a clamping force.

  Further, joints for improving adhesion strength are provided on at least one side of the front and back surfaces of the heat insulating material 4. This joint is provided by processing a groove having a known shape such as vertical, horizontal, grid, or oblique. The groove shape is, for example, a concave groove, a U groove, a V groove, or a Y groove. The concrete cast in this groove enters, but if there is a gap in the lower part of the groove, it becomes a ventilation groove, which is also a measure for preventing condensation.

  The hook 5 is made of stainless steel that has excellent heat insulation and is resistant to rust. As shown in FIG. 2, after the hook portion 5a is protruded and held on the heat insulating material 4, a tension member 6 for the PC board 3 is installed through the hook portion 5a and is tensioned with a jack. After that, concrete for the PC board 3 is placed and developed to the required strength to complete the sandwich panel 1. Although the hook 5 receives a downward force due to the concrete placement, the hook portion 5a is hooked on the tension members 6 and 6 of the upper and lower PC plates 2 and 3, respectively. Nor.

  In this way, the sandwich panel 1 is formed at the factory and cut to the required length. And as shown in FIG. 3, it installs as an outer wall in the building of a steel frame structure, for example, and is used for an outer heat insulation structure. According to the three-layer sandwich panel 1, in addition to heat insulation, sound insulation can be expected. Further, the PC board 3 of the surface material can be selected from various finishing materials by using high-strength concrete, and has a thickness of 50 mm or more and is excellent in fire resistance.

It is a cross-sectional view of the sandwich panel 1 according to the present invention. It is explanatory drawing of arrangement | positioning of the hook 5 in the middle of manufacture of the sandwich panel 1 based on the same invention. It is explanatory drawing which shows the use condition of the sandwich panel 1 which concerns on the same invention.

Explanation of symbols

1 sandwich panel,
2 perforated PC board, 2a hole,
3 PC board,
4 thermal insulation, 4a slit,
5 hook, 5a hook part,
6 Tension material.

Claims (3)

A heat-insulating material is sandwiched between pre-stressed concrete plates, and the outer peripheral edge of the heat-insulating material is cut in parallel with the tension material of the pre-stressed concrete plate, and a hook for adhesion reinforcement is inserted, and A slit formed in a width to maintain the position in the longitudinal direction of the hook by the clamping force due to friction with the hook is provided, and the hook portion is formed in the prestressed tension material of the two prestressed concrete plates through the slit. There is a hook that is hooked and buried,
A sandwich panel featuring. Of the front and back surfaces of the heat insulating material, a joint for improving adhesion strength is provided on one side, and a ventilation groove for preventing internal condensation is provided on the other side.
The sandwich panel according to claim 1 . It is a manufacturing method of a sandwich panel formed by sandwiching a heat insulating material between prestressed concrete plates,
  After one precast concrete board is formed by placing concrete after tensioning the internal tension material,
  While the concrete is uncured, on one of the precast concrete plates, an outer peripheral edge is cut in parallel to the tension material of the prestressed concrete plate, and a hook for adhesion reinforcement is inserted, and the hook Laying a heat insulating material provided with a slit formed in a width that maintains the position in the longitudinal direction of the hook by the clamping force due to friction with,
  Furthermore, while the concrete is uncured, the hook portion of the hook is inserted into the one precast concrete plate and rotated appropriately and lifted to hook the hook portion on the tendon and attach the hook,
  The hook is moved along the tension material, inserted into the slit of the heat insulating material and positioned, and the other hook part of the hook is protruded on the heat insulating material,
  A tension member is installed and tensioned on the protruding hook part of the hook on the upper side of the heat insulating material,
  It is manufactured by placing concrete on the heat insulating material to form the other precast concrete board,
  A method for producing a sandwich panel characterized by the above.

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