JPH0670337B2 - Lightweight cellular concrete panel and its mounting method - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a lightweight cellular concrete panel (hereinafter referred to as an ALC panel) used as a building material and a method of mounting the same, and particularly, when it is used by a seismic resistant construction method using embedded metal fittings, it occurs on a small surface of a panel or the like. TECHNICAL FIELD The present invention relates to a lightweight cellular concrete panel in which the mounting strength of a panel mounting portion is strengthened in order to prevent the easy splitting phenomenon, and a mounting method thereof.

[Prior art]

Conventionally, as shown in FIG. 9, a reinforcing bar 12 of an ALC panel 10
Is a plurality of main bars 14 extending in the longitudinal direction and arranged in parallel.
It consists of a plurality of horizontal bars 16 arranged at right angles to the main bars 14 in the width direction of the ALC panel 10 and fixed by welding.
Usually, a pair of reinforcing reinforcing bars 12 are embedded inside the ALC panel 10 in a state of being relatively faced at equal intervals in the thickness direction of the panel. Furthermore, when constructing a building using the ALC panel 10, many construction methods using an embedded metal fitting embedded inside the panel are often found. In this case, it is effective to transfer the load applied to the embedded metal fitting to the reinforcing bar 12 to improve the mounting strength of the ALC panel 10.

[Problems to be solved by the invention]

However, since each of the reinforcing bars 12 embedded in the ALC panel 10 has a large degree of freedom in the movement of the ALC panel 10 in the thickness direction, when the ALC panel 10 receives an external force,
As shown in FIG. 0, there is a problem that the splitting phenomenon is likely to occur at the upper and lower edges 18 of the ALC panel 10 and the vicinity thereof, and the application of the ALC panel 10 to a high-rise building is not desired. Therefore, it is an object of the present invention to enhance the mounting strength peculiar to the ALC panel and provide the ALC panel that is tough against external pressure so that the ALC panel can be used for high-rise buildings. It is another object of the present invention to provide a method for mounting an ALC panel, which has a sufficiently high mounting strength when the ALC panel is used in a high-rise building.

[Means for solving the problem]

In order to achieve the above object, in the ALC panel of the present invention, A
A plurality of sets of reinforcing steel bars embedded in the thickness direction of the LC panel are relatively fastened to each other by tight fittings. Further, in the ALC panel of the present invention, in addition to a plurality of sets of reinforcing reinforcing bars that are tightly bound by the fastening fittings, anchor metal fittings with screw holes for mounting bolts are incorporated. Specifically, the reinforcing bars are composed of planar reinforcing bars, and at least in the vicinity of both ends in the longitudinal direction of the panel, binding members are hung on opposing reinforcing bars, and in a region including the reinforcing bars hung on the binding members. , Anchor hardware (anchor member) is inserted between the reinforcing bars. Furthermore, the ALC panel mounting method uses an ALC panel in which multiple sets of reinforcing reinforcing bars embedded in the thickness direction of the panel are tightly bound together by binding metal fittings. In the anchor embedding hole drilled in the length direction of the ALC panel, or in the anchor embedding hole drilled in the width direction of the ALC panel from the lengthwise edge of the ALC panel, from the anchor embedding hole A slightly thinner anchor metal fitting is inserted, and a mounting bolt is screwed from the surface of the ALC panel into a screw hole provided in advance in the anchor metal fitting to mount the ALC panel to the structural steel material. This keeps the distance between the reinforcing bars constant,
ALC for high-rise buildings is prevented by preventing the occurrence of the splitting phenomenon at the small edge of the panel and consequently improving the mounting strength of the panel.
The panel can be used.

[Action]

According to the present invention, the reinforcing rebars embedded in the panel relative to each other in the thickness direction are tightly connected to each other by the binding metal fittings, so that the interval between the reinforcing rebars is kept constant. Therefore, even when a high-rise building is constructed with ALC panels using embedded metal fittings, the resistance to the splitting phenomenon that occurs in the small portion of the panel due to the free movement of the reinforcing bar is improved, making it suitable for high-rise buildings. ALC panels with a mounting strength well above the required 400 kg / m ² can be obtained. The binding metal can have any shape as long as it limits the degree of freedom of the reinforcing bars that are pulled apart in the thickness direction of the panel, so the degree of freedom of movement in the thickness direction is limited, The shape is determined in consideration of the ease of manufacturing and mounting the binding metal fittings. Further, when three or more sets of reinforcing bars are arranged, it is possible to connect only the reinforcing bars at the ends with a binding metal fitting, or to partially omit the connecting of the reinforcing bars as required. Also, by embedding the anchor metal fitting for screwing the mounting bolt inserted from the panel edge part in the width direction or the length direction of the ALC panel, the free movement of the reinforcing bar embedded in the panel is restricted, The mounting strength is further improved.

【Example】

Embodiments of the present invention will be described with reference to the drawings. (Example 1) In FIGS. 1 to 3, in the reinforcing bar 12 of the present example,
The 6.35 mm diameter SUS430 main bars 14 extending in the length direction of the ALC panel 10 are arranged at intervals of 70 mm in the thickness direction of the ALC panel 10, and the SUS430 diameter 5.5 mm extending in the width direction of the panel.
The horizontal reinforcing bar 16 is arranged at a right angle to the main bar 14 and is fixed by welding. Two sets of reinforcing bars 12 which are relative to each other, and then SUS430 binding metal fittings 20 with a diameter of 3 mm, which are opposite to each other 1
The ALC panel 10 having a width of 600 mm and a length of 1,500 mm is formed between the upper and lower edge portions 18a between the upper and lower parts by 18 mm, and the reinforcing reinforcing bars 12 in this state are used. As the shape of the binding member 20, in addition to the hook shape shown in FIG. 3, the shapes shown in FIGS. 4 (a), (b), (c) and (d) can be used. In this case, depending on the shape of the binding metal 20,
It should be noted that the degree of freedom of movement in the thickness direction and the ease of operation and installation of the binding metal fittings differ. For example, in the shape of the binding fitting as shown in FIG. 3, the circular hook portions at both ends are connected to the straight central portion by folding back. That is, the hook portion is connected to the straight central portion in a curved shape. For this,
Although the workability of hanging the binding member 20 on the reinforcing bar 12 is good, there is still a little freedom in movement in the thickness direction. That is, when the axial pulling force is excessively applied, the folded-back portion is pulled and deformed, and the hook portion comes to be linearly connected to the central portion. As a result, the binding metal 20 is elongated and the binding force of the binding metal 20 is insufficient, so that the effect of preventing splitting is reduced. Further, in the case of the binding metal fitting as shown in FIG. 4 (a), the right-angled key-shaped hook portions at both ends are easy to manufacture and contact the reinforcing bar 12, but the contact position is near the end of the hook portion. If there is, it is likely to be deformed by being pulled when an axial tensile force is excessively applied, so that a degree of freedom for movement in the thickness direction remains. In the shape of the binding metal fitting as shown in FIG. 4 (b), since the bending angle diameter is smaller than that of the hook portion in FIG. 4 (a), the resistance to the axial tensile force is large, but the reinforcing bar When the binding metal fitting 20 is hung on 12, a gap is created between the reinforcing bar 12 and the binding metal fitting 20 due to the bending angle of the hook portion. Because of this,
There is still a little freedom of movement in the thickness direction.
When excessive tension is exerted on the binding member 20 from the reinforcing bar 12, the reinforcing bar 12 works to push open the bending angle of the hook portion. As a result, the binding metal fitting 20 becomes elongated and the binding material
Since the binding force of 20 becomes insufficient, the effect of preventing splitting is reduced. Further, since the binding metal fitting as shown in FIG. 4 (c) is made of a plate material, it is advantageous in that the degree of freedom is lost, but it is time-consuming to manufacture. Further, in the shape of the binding metal fitting as shown in FIG. 4 (d), since the diameter of the bending angle of the hook portion is approximately equal to the diameter of the reinforcing bar 12, when the binding metal fitting 20 is hung on the reinforcing bar 12. Then, the tight fitting 20 is in close contact so as to surround the reinforcing bar 12.
Further, the hook portion is not folded back, that is, the hook portion is linearly connected to the linear portion. Therefore,
Since there is no degree of freedom for movement in the thickness direction, the reinforcing bar 12
Even when the pulling force is excessively applied to the binding member 20 from the above, the binding force of the binding member 20 is sufficiently maintained, and therefore the effect of preventing splitting does not decrease. Furthermore, the tip of the hook as shown in FIG. 4 (d) may be extended until it contacts the central portion so that the hook portion has an elliptical shape. In this case, the workability of hooking the binding member 20 on the reinforcing bar 12 is deteriorated, but the effect of preventing splitting can be maintained high. In this way, the shape of the binding metal 20 can be arbitrarily determined depending on the workability of manufacturing and mounting and the magnitude of the tensile force received from the reinforcing bar 12. With respect to the ALC panel 10, there is provided an anchor embedding hole 22 having a diameter of 24 mm and a length of 400 mm, which is opened in the central portion of the lengthwise edge 18b of the panel 100 mm away from the widthwise edge 18a and extends in the width direction of the panel. . An anchor metal piece 24 having a diameter of 22 mm and a length of 160 mm is inserted into the anchor embedding hole 22. The anchor metal 24 is generally tubular and has a high strength per unit weight, which is advantageous in terms of weight reduction. However, it may be better to use a solid rod-shaped anchor metal fitting 24 as a lightweight material. In addition to rod-shaped and tubular shapes, various anchor metal fittings 24
Can be adopted. For example, the anchor metal piece 24 may be formed in the shape of a vertically divided tube or in the shape of an elongated flat plate. A screw hole 26 is provided in the central portion of the anchor metal fitting 24, and a bolt hole 28 is aligned with the screw hole 26 and a bolt hole 28 is formed.
The inside extends to the panel surface. The mounting bolt 30 can be inserted into the ALC panel 10 through the bolt hole 28 and screwed into the screw hole 26 of the anchor metal piece 24. In addition, bolt holes
It is not necessary to screw mounting bolt 30 to 28. In the case of the present embodiment, the mounting bolt 30 penetrates the anchor metal piece 24. However, the mounting bolt 30 may be formed in a part of the anchor metal fitting 24 depending on the required mounting strength. That is, the mounting bolt 30 is the anchor hardware 24.
The holding capacity is greatest when there is a length sufficient to penetrate through, but the holding capacity is often sufficient even if the mounting bolt 30 is long enough to enter a part of the anchor metal object 24. Further, in the case of this embodiment, the screw hole 26 of the anchor metal piece 24 penetrates the anchor metal piece 24. However, the screw hole 26 may be provided only in a part of the anchor metal piece 24 depending on the required mounting strength. For example, in the case of the tubular anchor metal fitting 24, the screw hole 26 is provided only on the side where the mounting bolt 30 enters, and the screw hole 26 is provided on the opposite side. Thereby, the unnecessary screw hole manufacturing process can be omitted. In addition, in the anchor metal fitting 24 in which the pipe is split vertically or in the shape of an elongated flat plate, it is necessary to increase the wall thickness of the portion into which the mounting bolt 30 is inserted to enhance the bolt holding ability. Regarding the ALC panel 10 configured as shown in FIGS. 1 to 3,
A strength test was performed using a test apparatus 32 as shown in FIG. That is, the mounting bolt 30 is screwed into the screw hole 26 of the anchor metal 24 so that the base 34 of the test apparatus 32 is attached to the ALC panel 10.
Place the ALC panel 10 so that it is placed directly on one end of the
The mounting bolt 30 was screwed into the screw hole 26 via the flange 36 of 4 to fix the ALC panel 10 to the substrate 34. At the same time, the other end of the ALC panel 10 was held from below by the support device 38 of the test device 32 so that the ALC panel 10 was positioned horizontally. Then, at a position where the ALC panel 10 is divided into four equal parts in the lengthwise direction by the central axis in the longitudinal direction, the static load is indicated by the arrow L with the two action points being the positions corresponding to 1/4 of the foreheads 18a of the ALC panel 10, respectively. When it was loaded on, a mounting strength of 1260 kg / m ² was obtained. This mounting strength shows that it is possible to build a building as high as 150m when the safety factor is doubled. When the ALC panel 10 is used, it may be attached to the attachment member by screwing the attachment bolt 30 into the bolt hole 28, as in the case of attaching the test device 32 to the substrate 34. (Comparative Example 1) A conventional ALC panel manufactured in the same manner as in Example 1 was tested in the same manner as described above except that a binding metal was not used for the reinforcing bar of the ALC panel, and the result was 760 kg / m ² The mounting strength of was obtained. Therefore, the value of the mounting strength of 1260 kg / m ² of Example 1 is significantly higher than the mounting strength of 760 kg / m ² of Comparative Example 1 manufactured without using the binding metal for the main reinforcement of the ALC panel. (Embodiment 2) When the binding metal fittings are provided in two steps of 18 mm and 143 mm from the upper and lower width direction small openings 18a, that is, the small openings 18a are further added to those of the first embodiment
If a similar metal fitting is installed at a distance of 143 mm, the mounting strength of the ALC panel is 1300 Kg / m ² ,
There was not much difference compared to the case of Dan. (Example 3) In FIGS. 6 to 8, in the same manner as in Example 1, a width of 600 mm and a length of 1500 mm in which a binding metal member 20 was crotch-fitted between the two main bars 14 of the reinforcing bars 12 which face each other. The ALC panel 10 is configured. The ALC panel 10 shown in FIGS. 6 to 8 is provided with an anchor embedding hole 22 having a diameter of 24 mm and a length of 180 mm, which is opened in the central portion of the width small edge 18a and extends in the longitudinal direction. Then, in the anchor embedding hole 22, an anchor metal piece 24 having a diameter of 22 mm and a length of 160 mm is formed.
Has been inserted. A screw hole 26 is provided in the center of the anchor metal fitting 24, and a bolt hole 28 is aligned with the screw hole 26 and extends inside the ALC panel 10 to the panel surface. It can be screwed to 10. With respect to the ALC panel 10 configured as described above, the strength test was conducted using the test apparatus 32 as shown in FIG. And the ALC panel 10 with the longitudinal central axis
At the position where the ALC panel 10 is divided into four equal parts in the length direction.
Further, when a static load was applied as shown by the arrow L with the two action points at positions corresponding to 1/4, respectively, a mounting strength of 1260 kg / m ² was obtained. This mounting strength shows that it is possible to build a building as high as 150m when the safety factor is doubled. When the ALC panel 10 is used, it may be attached to the attachment member by screwing the attachment bolt 30 into the bolt hole 28, as in the case of attaching the test device 32 to the substrate 34. (Comparative Example 2) A conventional ALC panel manufactured in the same manner as in Example 3 was tested as described above except that a binding metal was not used for the reinforcing bar of the ALC panel, and the mounting strength was 760 kg.
Was / m ² . Therefore, the mounting strength of the ALC panel 10 of Example 3 is 1260 kg / m ²
It is clear that the significantly greater than the attachment strength 760 kg / m ² of ALC panel of Comparative Example 2. (Embodiment 4) When the binding metal fittings are respectively provided in two steps of 18 mm and 143 mm from the upper and lower edge 18a, that is, in Example 3, further small edge 18 is provided.
provided Tightened fittings at the 143mm than a, the mounting strength of the ALC panels when fabricated similarly is 1300Kg / m ^2, 1
There was not much difference compared to the case of Dan.

【The invention's effect】

As described above, with the ALC panel according to the present invention, it is possible to easily obtain the ALC panel that can be used for high-rise buildings by preventing the occurrence of the splitting phenomenon in the forefront part and consequently improving the mounting strength of the ALC panel. Became possible. Also, according to the present invention, an ALC constructed using embedded metal fittings.
Panels can be fully utilized for high-rise buildings, and there are great contributions to the industry.

[Brief description of drawings]

FIG. 1 is a front view of an ALC panel according to one embodiment of the present invention, in which reinforcing reinforcing bars are shown by imaginary lines. FIG. 2 is a sectional view taken along the line II-II in FIG. FIG. 3 is a sectional view taken along the line III-III in FIG. 4 (a) to 4 (d) are perspective views showing an embodiment of the binding fitting of the present invention. FIG. 5 is a front view of an ALC panel test apparatus according to the present invention. FIG. 6 is a front view of an ALC panel according to another embodiment of the present invention, in which the reinforcing bars are shown by imaginary lines. FIG. 7 is a sectional view taken along the line VII-VII in FIG. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. FIG. 9 is a partially removed perspective view of an ALC panel according to the prior art. FIG. 10 is a partially cutaway perspective view of an ALC panel according to the prior art, showing cracks due to use. In the figure, reference numerals refer to the following elements. 10 ... ALC panel, 12 ... Reinforcing bar, 14 ... Main bar, 16 ... Horizontal bar, 18a, 18b ... Edge, 20 ... Fastener, 22 ... Anchor embedding hole, 24 ... Anchor hardware, 26 ... Screw hole, 28 ... Bolt hole, 30… Mounting bolts, 32… Testing equipment, 34… Base, 36… Flanges, 38… Supporting equipment.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideki Ikeda 1-2-7 Moto Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Jun Okawa 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 In Kashima Construction Co., Ltd. (72) Inventor quote Shinnosuke 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 In Kashima Construction Co., Ltd. (72) Yoshinori Ishikawa 1-2-chome, Moto Akasaka, Minato-ku, Tokyo No. 7 in Kashima Construction Co., Ltd. (56) Reference JP 62-185941 (JP, A) JP 63-107642 (JP, A) JP 60-105748 (JP, A) Actual development Sho 63 -1122 (JP, U) Actually opened 60-152715 (JP, U)

Claims (4)

[Claims] 1. A pair of reinforcing rebars are embedded in a panel in the thickness direction of the panel so as to face each other at regular intervals, and the reinforcing rebars are composed of rebars that are assembled in a plane, and are rod-shaped or tubular from the fore edge of the panel. In the lightweight cellular concrete panel in which the panel mounting anchor member is inserted between the pair of reinforcing rebars, at least in the vicinity of both longitudinal ends of the panel, the pair of reinforcing rebars is held so as to maintain the distance between them. A light-weight cellular concrete panel, characterized in that a reinforcing metal member is hung on the reinforcing bar, and the anchor member is inserted between the reinforcing bar regions including the reinforcing bar on which the reinforcing metal member is hung. 2. The binding metal fitting comprises a central portion and hook portions at both ends thereof, the hook portions are bent in an arc shape without being folded back, and the bending angle diameter of the hook portions is larger than the diameter of the reinforcing bar. The lightweight cellular concrete panel according to claim 1. 3. A pair of reinforcing rebars are embedded in the thickness direction of the panel so as to face each other at regular intervals, and the reinforcing rebars are composed of rebars assembled in a plane, and at least at both ends in the longitudinal direction of the panel. In the vicinity, a binding metal fitting is hung on the opposing reinforcing bars so as to maintain the distance between the pair of reinforcing reinforcing bars, and in a region including the reinforcing bars on which the binding metal fittings are hung, a bar-shaped rod from the small face of the panel is provided between the pair of reinforcing reinforcing bars. Or using a lightweight cellular concrete panel in which an annular panel mounting anchor member is inserted toward the width direction of the panel, by screwing a mounting bolt from the panel surface into a screw hole previously provided in the anchor member, A method for mounting a lightweight cellular concrete panel, characterized in that the lightweight cellular concrete panel is mounted on a panel mounting member. 4. The binding member comprises a central portion and hook portions at both ends thereof, the hook portions are bent in an arc shape without being folded back, and the bending angle of the hook portions is larger than the diameter of the reinforcing bar. 4. The method for mounting a lightweight cellular concrete panel according to claim 3.