Extruded cement boards for width adjustment, and wall structure

Abstract

The present invention provides an extruded cement board for width adjustment that reduces costs and prevents defects such as cracking or chipping of the remaining portion after cutting, as well as a wall structure using the extruded cement board. [Solution] This is an extruded cement board 1 for width adjustment, which is cut and placed at the edge of the wall surface to adjust the width of the wall surface when constructing a wall surface with multiple extruded cement boards. By making the width d1 of the hollow portion 2 2 2.5 times or less the thickness t of the base material corresponding to the hollow portion 2, even if the board is cut at any position B, C, D where the hollow portion 2 exists, the flange-shaped remaining portions 4, 5, and 6 remaining after cutting will have a length d2 that maintains sufficient strength, preventing defects such as cracking and chipping of the remaining portions 4, 5, and 6.

Description

Technical Field

[0001] The present invention relates to an extruded cement board for width adjustment disposed in a cut state at the wall end to adjust the wall width when constructing a wall surface, and a wall structure using the extruded cement board.

Background Art

[0002] Extruded cement boards having hollow parts are widely used in buildings due to requirements such as weight reduction of the building body and improvement of construction efficiency. The extruded cement board is attached to a base angle (L-shaped angle) attached to the building body by attachment fittings (Z clips etc.) attached to the four corners of the extruded cement board.

[0003] When constructing a wall surface by attaching such an extruded cement board, in addition to an extruded cement board of a specified width, it may be necessary to attach an extruded cement board with adjusted width (extruded cement board for width adjustment) according to the width of the wall surface to be attached. Although a standard extruded cement board is cut in the width direction for width adjustment, since the dimensions for width adjustment vary depending on various specifications, the cutting of the extruded cement board is to be performed at an arbitrary position.

[0004] When a standard extruded cement board is cut at an arbitrary position in the width direction, depending on the cutting position, it may be cut in the hollow part, so a concave shape having two flange-shaped remaining parts appears. When the length of the remaining part becomes long, the concave-shaped part has no support, so there is a high possibility that problems such as cracking and chipping of the remaining part occur. Therefore, the concave part is filled with mortar etc. to shorten the flange-shaped remaining part and reinforce it, but processing labor and filling materials are required, resulting in cost increase.

[0005] It is also conceivable to manufacture extruded cement boards in the required width, but the width that needs adjustment varies depending on the wall surface to be installed on and is not constant, so multiple dedicated fittings for each width dimension would be required, resulting in a significant increase in costs. It is also conceivable to reduce the size of the hollow section and make the recessed shape formed after cutting as small as possible. However, when attaching extruded cement boards to a wall surface, nuts for attaching fittings such as Z-clips must be inserted into the hollow section, so it cannot be made smaller than the specified size.

[0006] Patent Document 1 describes an exterior wall panel having hollow holes along the longitudinal direction and designed to be cut to a specified width in the width direction for use, wherein a minimum specified arrangement of hollow holes is formed so as to be uniform in a predetermined minimum specified width, and this minimum specified arrangement is repeatedly extended in the width direction in units of a predetermined multiple via joint width portions, and the exterior wall panel is formed to a standard width such that the entire arrangement of these repeatedly extended hollow holes is uniform. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 09-032190 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] In the exterior wall panel described in Patent Document 1, the shape is designed so that it can be cut at a predetermined position along the panel width, thus avoiding cutting in the hollow section. However, depending on the mounting position of the exterior wall panel, it may be necessary to cut in the hollow section. This could result in a longer flange-like remaining portion of the recessed shape created by the cutting, potentially causing defects.

[0009] In view of the problems of the prior art, the present invention aims to provide an extruded cement board for width adjustment that reduces costs and does not cause defects such as cracking or chipping of the remaining portion after cutting, as well as a wall structure using the extruded cement board. [Means for solving the problem]

[0010] The present invention relates to an extruded cement board for width adjustment, which is cut and placed at the edge of a wall surface to adjust the width of the wall surface when a wall surface is constructed with multiple extruded cement boards, characterized in that multiple hollow portions are arranged in a row along one direction, and the width of the hollow portion in the direction perpendicular to the thickness direction of the extruded cement board is 2.5 times or less the thickness of the base material corresponding to the hollow portion.

[0011] According to the width-adjusting extruded cement board of the present invention, the width in the hollow portion in the direction perpendicular to the thickness direction of the extruded cement board is 2.5 times or less the thickness of the base material corresponding to the hollow portion. Therefore, even if the width-adjusting extruded cement board is cut at any position where a hollow portion exists, the flange-shaped remaining portion after cutting will be of a length that maintains strength, and will not cause defects such as cracking or chipping of the remaining portion. In addition, since there is no need to fill the recessed portion with mortar or the like, costs can be reduced.

[0012] A wall structure comprising multiple extruded cement boards, wherein width-adjusting extruded cement boards cut in the width direction are provided at the edges of the wall surface to adjust the wall width, and the width-adjusting extruded cement boards have multiple hollow sections arranged in parallel along one direction, and the width of the hollow section in the direction perpendicular to the thickness direction of the extruded cement board is 2.5 times or less the thickness of the base material corresponding to the hollow section.

[0013] According to the wall structure of the present invention, the width of the hollow portion of the extruded cement board used for width adjustment, in the direction perpendicular to the thickness direction of the extruded cement board, is 2.5 times or less the thickness of the base material corresponding to the hollow portion. Therefore, even if the extruded cement board used for width adjustment is cut at any position where the hollow portion exists, the flange-shaped remaining portion after cutting is of a length that maintains strength, and no defects such as cracking or chipping occur in the remaining portion. In addition, since there is no need to fill the recessed portion with mortar or the like, costs can be reduced.

[0014] In the above-described wall structure, the multiple extruded cement boards may consist of standard extruded cement boards and extruded cement boards for width adjustment. Furthermore, if the extruded cement boards for width adjustment have a smaller width dimension than the standard extruded cement boards as needed, the cut pieces of the extruded cement boards for width adjustment can be made as short as possible, thereby reducing costs. [Effects of the Invention]

[0015] According to the present invention, even when cut at any position where a hollow section exists, the flange-shaped remaining portion after cutting will be of sufficient length to maintain strength, preventing defects such as cracking or chipping of the remaining portion. Since there is no need to fill the recessed portion with mortar or the like, costs can be reduced. [Brief explanation of the drawing]

[0016] [Figure 1] (a) is a cross-sectional view and perspective view of an extruded cement board with a width of 600 mm, illustrating one embodiment of the present invention, and (b) is a cross-sectional view and perspective view of an extruded cement board with a width of 900 mm, illustrating one embodiment of the present invention. [Figure 2] (a) and (b) are cross-sectional views showing the cutting positions of an extruded cement board for width adjustment with a width of 600 mm, and (c) is a cross-sectional view of the extruded cement board for width adjustment after cutting (a) at position D. [Figure 3](a) and (b) are cross-sectional views showing the cutting positions of an extruded cement board for width adjustment with a width of 900 mm, and (c) is a cross-sectional view of the extruded cement board for width adjustment after cutting (a) at position D. [Figure 4] (a) is a diagram showing an example of laying out a standard 600mm wide extruded cement board and an extruded cement board for width adjustment, (b) is a diagram after the extruded cement board for width adjustment has been cut, (c) is a diagram showing an example of laying out a standard 900mm wide extruded cement board and an extruded cement board for width adjustment, and (d) is a diagram after the extruded cement board for width adjustment has been cut. [Figure 5] This is a perspective view showing the wall structure of the present invention. [Modes for carrying out the invention]

[0017] Embodiments of the present invention will be described with reference to the drawings. Figure 1(a) is a cross-sectional view and perspective view of an extruded cement board 1 with a width of 600 mm, showing one embodiment of the present invention, and (b) is a cross-sectional view and perspective view of an extruded cement board 1 with a width of 900 mm, showing one embodiment of the present invention.

[0018] The width-adjusting extruded cement board 1 is manufactured by extruding a mixture of cement, aggregate, fibers, admixtures, water, etc., through an extrusion molding machine, similar to standard extruded cement boards, and cutting it to a predetermined size. The width-adjusting extruded cement board 1 has multiple hollow sections 2 formed in a rectangular cross-section, arranged parallel to each other in the longitudinal direction, which is the extrusion direction. The wall surface is composed of multiple standard extruded cement boards and the width-adjusting extruded cement board 1, which is cut and placed at the edge of the wall surface to adjust the wall width.

[0019] The ends of the width-adjusting extruded cement board 1 have interlocking grooves and protrusions. Similar to standard extruded cement boards, the back side base material of the width-adjusting extruded cement board 1 is sandwiched from the inside and outside by a nut inserted into the hollow section 2 and a Z-clip, and the extruded cement board 1 is attached to the base material connected to the building's frame via the Z-clip.

[0020] In the extrusion-formed cement board 1 for width adjustment with a width of 600 mm as shown in Fig. 1(a), hollow portions 2 of the same size are arranged side by side in one direction at 11 locations. In the extrusion-formed cement board 1 for width adjustment with a width of 900 mm as shown in Fig. 1(b), hollow portions 2 of the same size are arranged side by side in one direction at 17 locations. The plurality of hollow portions 2 formed in these extrusion-formed cement boards 1 for width adjustment are formed smaller than before.

[0021] Figs. 2(a) and (b) are cross-sectional views showing the cutting positions of the extrusion-formed cement board 1 for width adjustment with a width of 600 mm, and Fig. 2(c) is a cross-sectional view of the extrusion-formed cement board 1 for width adjustment after cutting at position D in Fig. 2(a). Figs. 3(a) and (b) are cross-sectional views showing the cutting positions of the extrusion-formed cement board 1 for width adjustment with a width of 900 mm, and Fig. 3(c) is a cross-sectional view of the extrusion-formed cement board 1 for width adjustment after cutting at position D in Fig. 3(a).

[0022] The width d1 in the direction orthogonal to the thickness direction of the extrusion-formed cement board in the hollow portion 2 is 2.5 times or less the dimension of the base material thickness t corresponding to the hollow portion 2. In this embodiment, the width d1 of the hollow portion 2 is 35 mm, and the base material thickness t corresponding to the hollow portion 2 is 14 mm, allowing a nut with a width of about 30 mm to be inserted. Therefore, the minimum value of the width d1 of the hollow portion is a dimension into which the nut can be inserted, for example, about 30 mm.

[0023] As shown in Fig. 2(a), with the leftmost position A as a reference point, cutting is possible at positions B, C, and D, which are arbitrary positions in the hollow portion 2. As shown in Fig. 2(b), with the rightmost position A as a reference point, cutting is possible at positions B, C, and D, which are arbitrary cutting locations in the hollow portion 2. These cutting positions B, C, and D are examples, and cutting may be performed at any of the hollow portions 2, 2 ···, and also at any position from one end to the other end (within the range of the width d1) of the hollow portion 2. Cutting is of course possible at the position of the partition portion 3 between adjacent hollow portions 2, 2.

[0024] As shown in Figure 2(c), when the 600mm wide extruded cement board 1 for width adjustment is cut at position D, the flange-shaped remaining portion 4 after cutting has a length d2 that maintains its strength, preventing defects such as cracking or chipping of the remaining portion 4. Since there is no need to fill the recessed portion with mortar or the like, costs can be reduced. Similarly, when cut at positions B and C, the remaining portions 5 and 6 after cutting have a length d2 that maintains their strength, preventing defects such as cracking or chipping of the remaining portions 5 and 6. The maximum value of the length d2 of the flange-shaped remaining portions 4, 5, and 6 is the width d1 of the hollow portion, and the minimum value is 0.

[0025] Similarly, as shown in Figure 3(a), cutting can be made at any position B, C, or D in the hollow section 2, using position A at the left end as the reference point. As shown in Figure 3(b), cutting can be made at any cutting point B, C, or D in the hollow section 2, using position A at the right end as the reference point. These cutting positions B, C, and D are examples, and cutting can be made at any of the hollow sections 2, 2..., and at any position from one end to the other (within the range of width d1) of the hollow section 2.

[0026] As shown in Figure 3(c), when the 900mm wide extruded cement board 1 for width adjustment is cut at position D, the remaining portion 4 after cutting will have a length d2 that maintains its strength, preventing defects such as cracking or chipping of the remaining portion 4. Since there is no need to fill the recessed portion with mortar or the like, costs can be reduced. Similarly, when cut at positions B and C, the remaining portions 5 and 6 after cutting will have a length d2 that maintains their strength, preventing defects such as cracking or chipping of the remaining portions 5 and 6.

[0027] Figure 4(a) shows an example of arranging a standard 600mm wide extruded cement board 100 with an extruded cement board 1 for width adjustment, and (b) shows the result after the width adjustment extruded cement board 1 has been cut to adjust the overall width. Figure 4(c) shows an example of arranging a standard 900mm wide extruded cement board 100 with an extruded cement board 1 for width adjustment, and (d) shows the result after the width adjustment extruded cement board 1 has been cut to adjust the overall width.

[0028] As shown in Figure 4(a), when standard 600mm wide extruded cement boards 100 are laid out on a wall surface, in order to adjust the overall width, an adjustment extruded cement board 1 of 600mm width is laid out at the end, and then the width adjustment extruded cement board 1 is cut, for example, at position D to obtain the overall width as shown in Figure 4(b), thereby forming a wall surface of the predetermined dimensions. In this case, a remaining portion 4 with a length d2 sufficient to maintain strength appears.

[0029] As shown in Figure 4(c), when standard 900mm wide extruded cement boards 100 are laid on a wall surface, in order to adjust the overall width, a 900mm wide adjustment extruded cement board 1 is laid at the end, and then the width adjustment extruded cement board 1 is cut, for example, at position D to obtain the overall width as shown in Figure 4(d), thereby forming a wall surface of the predetermined dimensions. In this case, a remaining portion 4 with a length d2 sufficient to maintain strength appears.

[0030] In the above explanation, we described an example where a 900mm wide standard extruded cement board 100 is fitted with an extruded cement board 1 for width adjustment that is 900mm wide. However, when a 900mm wide standard extruded cement board 100 is fitted, if the required additional width is 600mm or less, an extruded cement board 1 for adjustment that is 600mm wide can be fitted, cut at the required position, and used to form the wall.

[0031] On the other hand, if the required additional width exceeds 600 mm, a 900 mm wide extruded cement board 1 for width adjustment can be laid out and cut at the required position to form the wall surface. In this way, by using an extruded cement board 1 for width adjustment that has a smaller width dimension than the standard extruded cement board 100 as needed, the cut pieces of the extruded cement board 1 for width adjustment can be made as short as possible, thereby reducing costs.

[0032] In the above embodiment, the wall surface was constructed using standard extruded cement boards 100 with widths of 600 mm and 900 mm, and corresponding width-adjusting extruded cement boards 1. However, the wall surface may also be constructed using only the width-adjusting extruded cement boards 1 with widths of 600 mm and 900 mm. Specifically, examples include constructing the wall surface using only the width-adjusting extruded cement boards 1 with widths of 600 mm, constructing the wall surface using only the width-adjusting extruded cement boards 1 with widths of 900 mm, and constructing the wall surface by combining the width-adjusting extruded cement boards 1 with widths of 600 mm and 900 mm.

[0033] Figure 5 is a perspective view showing the wall structure H of the present invention. This wall structure H shows an example in which a 600 mm wide extruded cement board 1 for width adjustment is placed at the end of a standard 600 mm wide extruded cement board 100.

[0034] In this embodiment, the width of the extruded cement board 1 for width adjustment is such that the width d1 of the hollow portion 2 is 2.5 times or less the thickness t of the base material corresponding to the hollow portion 2. Therefore, even if the extruded cement board 1 for width adjustment is cut at any position where the hollow portion 2 exists, the flange-shaped remaining portions 4, 5, and 6 that remain after cutting will have a length d2 that is sufficient to maintain strength, and will not cause defects such as cracking or chipping of the remaining portions 4, 5, and 6. Since there is no need to fill the recessed portion with mortar or the like, costs can be reduced.

[0035] If the wall structure H is constructed using the width-adjusting extruded cement board 1, even if the width-adjusting extruded cement board 1 is cut at any position, the remaining portions 4, 5, and 6 after cutting will have a length d2 sufficient to maintain strength, preventing defects such as cracks and chips in the remaining portions 4, 5, and 6, and eliminating the need for filling with mortar or other materials, thus reducing costs.

[0036] By using the width-adjusting extruded cement board 1 of this embodiment, regardless of where the cutting is made, including the partition wall portion 3 between adjacent hollow portions 2, it is possible to prevent defects such as cracking or chipping of the remaining portions 4, 5, and 6 after cutting, thereby significantly improving work efficiency.

[0037] The present invention is not limited to the embodiments described above. The extruded cement boards for width adjustment can be modified as appropriate depending on their shape, layout, and type of substrate, and the width, number of hollow sections, shape, and surface design of the extruded cement boards for width adjustment can be changed as long as the effects of the present invention are not impaired. The various members used in the wall structure may take any form as long as the effects of the present invention are not impaired. [Explanation of Symbols]

[0038] 1. Extruded cement board for width adjustment 2 Hollow part 3 Partition wall 4, 5, 6 remaining part 100 standard extruded cement boards d1 Width of the hollow section d2 Length of the remaining portion t Base material thickness H wall structure

Claims

1. When constructing a wall surface with multiple extruded cement boards, an extruded cement board for width adjustment is placed at the edge of the wall surface in a state where it has been cut in the width direction in order to adjust the width of the wall surface, An extruded cement board for width adjustment, characterized in that multiple hollow sections are arranged in parallel along one direction, and the width of the hollow section in the direction perpendicular to the thickness direction of the extruded cement board is 2.5 times or less the thickness of the base material corresponding to the hollow section.

2. A wall structure composed of multiple extruded cement boards, wherein width-adjusting extruded cement boards cut in the width direction are provided at the edges of the wall surface to adjust the wall width, The wall structure is characterized in that the width-adjusting extruded cement board has a plurality of hollow sections arranged in parallel along one direction, and the width of the hollow section in the direction perpendicular to the thickness direction of the extruded cement board is 2.5 times or less the thickness of the base material corresponding to the hollow section.

3. The wall structure according to claim 2, characterized in that the plurality of extruded cement boards consist of standard extruded cement boards and extruded cement boards for width adjustment.

4. The wall structure according to claim 3, wherein the extruded cement board for width adjustment has a smaller width dimension than the standard extruded cement board.

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