JP2020193561A - Extruded cement panels - Google Patents

Abstract

To provide an attachment structure of a finishing material capable of eliminating restrictions on layout of the finishing material and also capable of maintaining allowable stress of extruded cement panels.SOLUTION: There is provided an attachment structure c1 of a finishing material for attaching a plurality of extruded cement panels 1 to a building frame 3 in a vertically boarded state and attaching a finishing material 15 to a front side of these extruded cement panels 1 using an attachment substrate material 16. The attachment substrate material 16 continuous in the horizontal direction is arranged on the front side of the plurality of extruded cement panels 1 via fixing mechanisms 17. The fixing mechanism 17 comprises a receiving metal fitting 20 in a first hollow part 2A, an anchor metal fitting 21 penetrating into a front side base material 1b of the extruded cement panels 1, and a base plate 22 bound to the front side base material 1b by the anchor metal fitting 21 to fix the attachment substrate material 16, where a vertical groove 23 extending vertically is formed on the front side of each of the extruded cement panels 1, and the anchor metal fitting 21 of the fixing mechanism 17 is disposed in this vertical groove 23.SELECTED DRAWING: Figure 5

Description

The present invention relates to a mounting structure for mounting a finishing material, which is a surface decorative material, on the surface of an outer wall material mounted on a building frame, and in particular, stress concentration due to a drilling defect of an extruded cement plate is a factor. The present invention relates to a mounting structure of a finishing material that can prevent a decrease in strength.

Extruded cement boards are lightweight and have high strength, so they are widely used as exterior wall materials for buildings. In an outer wall structure using an extruded cement plate, an angle as a base material is generally fixed to the building frame, and a Z clip or the like fastened to the back surface of the extruded cement plate is locked to the angle for extrusion. A molded cement plate is attached.

A finishing material, which is a surface decorative material such as a stone material, is also attached to the surface of an extruded cement plate. Various finishing materials such as stones and tiles are attached by directly attaching them to the surface of the extruded cement board with an adhesive or mortar, or by fastening them to the extruded cement board with the fittings of the finishing material. In such a mounting structure, since each finishing material does not follow the interlayer displacement of the plurality of extruded cement plates, the finishing material cannot be mounted across the joints of the plurality of extruded cement plates. Therefore, there is a limitation that the finishing material must be allocated in the plane of one extruded cement plate.

As a structure that can solve the limitation of allocation of the finishing material, for example, there is a mounting structure described in Patent Document 1. In this mounting structure, a plurality of horizontally continuous mounting base materials are fastened to the surface of a plurality of extruded cement plates at predetermined intervals in the vertical direction via a fastening mechanism. , An anchor metal fitting that is installed in one of the hollow parts, an anchor metal fitting that is screwed into the metal fitting and penetrates the surface side base material of the extruded cement plate, and is fastened to the surface side base material by this anchor metal fitting. It is a mounting structure of a finishing material having a base plate to which the mounting base material is fixed. This structure is such that a plurality of finishing materials are attached via horizontally continuous mounting base materials provided on the surfaces of the plurality of extruded cement plates, and is related to the allocation of the extruded cement plates. It is possible to attach a finishing material without using it.

Japanese Unexamined Patent Publication No. 2000-14502

In the mounting structure described in Patent Document 1, an anchor metal fitting such as a bolt for mounting a mounting base material is passed through a base material on the surface side of an extruded cement plate. Therefore, the extruded cement plate must be provided with a plurality of through holes. When a tensile force due to a negative pressure acts on the surface of an extruded cement plate, bending deformation that bends outward occurs on the surface side. At that time, it is assumed that the force is concentrated on the place where the plurality of through holes exist, and the fracture occurs with a force smaller than the original bending strength. Therefore, the allowable stress is designed to be lower than the stress when the through hole does not exist. Designing with a reduced allowable stress leads to a reduction in the support span of the extruded cement plate, and there is a problem that, for example, there is a large limitation in vertical construction in a building with a large floor height.

Therefore, in view of the problems of the prior art, it is an object of the present invention to provide a finishing material mounting structure capable of eliminating the limitation on the allocation of the finishing material and maintaining the allowable stress of the extruded cement plate.

In the mounting structure of the finishing material of the present invention, a plurality of extruded cement boards in which a plurality of hollow portions are arranged side by side in one direction are mounted vertically on the frame of the building, and the finishing material is applied to the surface of these extruded cement boards. In the mounting structure of the finishing material to be mounted, a plurality of horizontally continuous mounting base materials are provided on the surface of the plurality of extruded cement plates via a fastening mechanism at predetermined intervals in the vertical direction. The fastening mechanism includes a receiving metal fitting installed in any of the hollow portions, an anchor metal fitting that is screwed into the receiving metal fitting and penetrates the surface side base material of the extruded cement plate, and the anchor metal fitting. In a mounting structure of a finishing material having a base plate that is tightly bound to the surface-side base material and to which the mounting base material is fixed, a vertical extension extending in the vertical direction on the surface side of each extruded cement plate. Along with the formation of the groove, the anchor metal fitting of the fastening mechanism is provided in the vertical groove, and the base plate of the fastening mechanism is installed in the vertical groove in a state of straddling the vertical groove. It is characterized in that the base plate is tightly bound to the outside of the flute.

According to the mounting structure of the finishing material of the present invention, a vertical groove extending in the vertical direction is formed on the surface side of each extruded cement plate, and an anchor of a fastening mechanism for mounting the finishing material in the vertical groove. Since the metal fittings are provided, the strength does not decrease due to stress concentration due to the drilling defect. Therefore, the allowable stress of the extruded cement plate can be maintained, and the design can be performed without lowering the allowable stress. As a result, it is not necessary to reduce the support span of the extruded cement plate, and the degree of freedom in the construction of the extruded cement plate can be maintained even when the finishing material is attached. At the same time, a plurality of mounting base materials that are continuous in the horizontal direction are provided via a fastening mechanism at predetermined intervals in the vertical direction, and the finishing material is attached to these mounting base materials. It is possible to eliminate the allocation restriction.

It is preferable that a plurality of the fastening mechanisms are configured in each of the extruded cement plates, and a plurality of the anchor fittings of the fastening mechanisms are provided in the same vertical groove. In this case, even when the plurality of extruded cement plates are displaced between layers, the plurality of mounting base materials swing in the horizontal direction while maintaining a parallel state with each other. Therefore, the influence of the interlayer displacement of the plurality of extruded cement plates on the finishing material becomes smaller, and damage to the finishing material can be reliably prevented.

The vertical groove is preferably formed at a substantially central portion in the horizontal direction of each of the extruded cement plates. In this case, the mounting base material for mounting the finishing material can be smoothly swung in the horizontal direction.

The base plate of the fastening mechanism is installed so as to straddle the vertical groove. Since the contact area between the extruded cement plate and the base plate is small, when multiple extruded cement plates are displaced between layers, the base plate tightly connected by the anchor fittings can move easily, and the mounting base material can be shaken more smoothly in the horizontal direction. Can be moved.

Any of the hollow portions in which the receiving metal fitting of the fastening mechanism is installed is formed in a substantially triangular cross section narrowing toward the vertical groove, and the receiving metal fitting follows the shape of the hollow portion. The hollow portion is formed in a substantially V-shaped cross section, and the hollow portion has a size in which both outer edges in the horizontal direction do not intersect with the other hollow portions on both sides in the thickness direction of the extruded cement plate, and the vertical groove is one of the above. It is preferable that the hollow portion is formed with a width equal to or less than the widest width constituting the base on the side far from the vertical groove having a substantially triangular cross section. In this case, the reliability of the fastening mechanism is improved, and at the same time, the strength of the flutes can be reliably maintained.

It is preferable that the finishing material is displaceably mounted with respect to the mounting base material. In this case, even when the mounting base material for mounting the finishing material swings in the horizontal direction, the displacement can be absorbed and the influence of the swing on the finishing material can be reduced.

It is preferable that a locking block is provided at the lower center in the width direction of each of the extruded cement plates. By providing the locking block, the extruded cement plate can be displaced between layers with the locking block as a fulcrum, so that the mounting base material for mounting the finishing material can be swung more smoothly in the horizontal direction.

According to the present invention, since the strength does not decrease due to the stress concentration due to the drilling defect, the allowable stress of the extruded cement plate can be maintained, and the design can be performed without lowering the allowable stress. As a result, it is not necessary to reduce the support span of the extruded cement plate, and the degree of freedom in the construction of the extruded cement plate can be maintained even when the finishing material is attached. At the same time, a plurality of horizontally continuous mounting base materials are provided via a fastening mechanism at predetermined intervals in the vertical direction, and the finishing materials are mounted on these mounting base materials, so that the finishing materials are allocated. You can remove the restrictions.

It is a vertical cross-sectional view which shows the mounting structure of the finishing material which concerns on one Embodiment of this invention provided in the joint part of the vertically stretched extruded cement board. It is a cross-sectional view which shows the mounting structure of a finishing material, and is a partially enlarged view. It is a top view of the extruded cement board. It is a vertical cross-sectional view which shows the mounting structure of the finishing material which concerns on one Embodiment of this invention provided in the middle part of the vertically stretched extruded cement board. It is an external explanatory view which attached the finishing material in the attachment structure of the finishing material. It is a partially enlarged view of FIG. It is a graph which shows the support span when the extruded cement board of this invention and the conventional extruded cement board are used. It is explanatory drawing which shows the behavior of a plurality of finishing materials when the interlayer displacement occurs in a plurality of extruded cement plates. It is a top view which shows the modification of the extruded cement board. It is a top view which shows the other modification of the extruded cement board. It is a top view of the conventional extruded cement board.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing a finishing material mounting structure c1 according to an embodiment of the present invention provided at a joint portion of a vertically stretched extruded cement plate 1, and FIG. 2 is a vertical cross-sectional view showing a finishing material mounting structure c1. It is a cross-sectional view which shows. FIG. 3 is a plan view of the extruded cement plate 1. FIG. 4 is a vertical cross-sectional view showing a mounting structure c2 of a finishing material according to an embodiment of the present invention provided in an intermediate portion of a vertically stretched extruded cement plate 1. In the vertical cross-sectional views of FIGS. 1 and 4, different cross-sectional positions are shown for each main member in the width direction for structural explanation.

A plurality of extruded cement plates 1 are attached to the frame of the building, and a plurality of finishing materials 15 are attached to the surface 1h of the extruded cement plates 1. The extrusion-molded cement plate 1 is manufactured by extruding a mixture of water, cement, aggregate, fibers and the like with an extrusion molding machine, curing and curing the mixture, and then cutting the mixture to a predetermined size. The extruded cement plate 1 is formed with a plurality of hollow portions 2 parallel to each other in the longitudinal direction, which is the extrusion direction.

The extruded cement plate 1 is attached to the frame of the building by a conventional vertical construction method. As shown in FIG. 1, an L-shaped angle 4 is fixed to a steel material 3 which is a skeleton, and a receiving angle 5 which is a base material extending in the horizontal direction is fixed to the L-shaped angle 4. The lower part of the extruded cement plate 1 is supported by the receiving angle 5. A hard packing 6 is provided between the receiving angle 5 and the back surface side base material 1a of the extruded cement plate 1.

The Z clip 9 is fastened to the extruded cement plate 1 with mounting bolts 7, square nuts 8, and the like. The Z clip 9 fastened to the extruded cement plate 1 is engaged with the receiving angle 5, and the mounting bolt 7 is tightened so that the lower side of the extruded cement plate 1 is fixed to the receiving angle 5. A locking block 10 is installed at the lower center in the width direction of the extruded cement plate 1, and a sealing material 11, a drain pipe 12, a draining plate 13, and the like are provided on the front surface side of the extruded cement plate 1.

A plurality of finishing materials 15 are attached to the surface 1h of the plurality of extruded cement plates 1. These finishing materials 15 are attached using the attachment structure c1 of the finishing material. FIG. 5 is an external explanatory view of the finishing material 15 attached to the finishing material attachment structure c1, and FIG. 6 is a partially enlarged view of FIG. As shown in these figures, a plurality of horizontally continuous mounting base materials 16 are provided on the surface 1h of the plurality of extruded cement plates 1 at predetermined intervals in the vertical direction. The fastening mechanism 17 for providing the mounting base material 16 on the surface 1h of the extruded cement plate 1 is a receiving metal fitting 20 installed in any of the hollow portions 2 and a receiving metal fitting 20 thereof, as shown in FIGS. 1 and 4. An anchor metal fitting 21 that is screwed into the metal fitting 20 and penetrates the surface side base material 1b of the extruded cement plate 1, and a base plate that is fastened to the surface side base material 1b by the anchor metal fitting 21 and to which the mounting base material 16 is fixed. It has 22 and.

The shape of the extruded cement plate 1 to which the finishing material 15 is attached will be described with reference to FIG. The plurality of hollow portions 2 arranged side by side in one direction are composed of a first hollow portion 2A having a substantially triangular cross section on which the receiving metal fitting 20 is installed, a second hollow portion 2B for fastening the Z clip 9, and the like. ing. A vertical groove 23 extending in the vertical direction is formed on the surface side of the extruded cement plate 1. The vertical groove 23 is formed at a position corresponding to the first hollow portion 2A.

The first hollow portion 2A having a substantially triangular cross section on which the receiving metal fitting 20 is installed is formed so as to narrow toward the vertical groove 23. The top portion a1 on the vertical groove side of the first hollow portion 2A and both outer edges a2 in the horizontal direction are flat. The first hollow portion 2A is formed in such a size that both outer edges a2 in the horizontal direction do not intersect the second hollow portion 2B which is another hollow portion on both sides in the thickness direction of the extruded cement plate. The cross-sectional shape of the second hollow portion 2B for fastening the Z clip 9 is not particularly limited as long as the square nut 8 or the like can be installed.

In this embodiment, three vertical grooves 23 are formed according to the number of the first hollow portions 2A. The number of flutes 23 is not limited, and may be one, two, or four or more. One of the three vertical grooves 23 of the present embodiment is formed in a substantially central portion in the horizontal direction of the extruded cement plate 1, and the other two vertical grooves 23 are equally spaced on both sides thereof. Is formed.

The vertical groove 23 of the present embodiment has a rectangular cross section, and is formed with a width t2 equal to or less than the width t1 of the first hollow portion 2A. The present inventor has found that the difference in the degree of stress generated between the surface portion of the extruded cement plate 1 and the groove bottom portion of the vertical groove 23 corresponds to the distance from the horizontal line z passing through the center of gravity. Assuming that the distance from the groove bottom 23h of the vertical groove 23 to the horizontal line z passing through the center of gravity of the extruded cement plate 1 is a, and the distance from the surface 1h of the extruded cement plate 1 to the horizontal line z is b, (a / b) = (stress degree generated in the groove bottom portion of the vertical groove / stress degree generated in the surface portion). In this embodiment, the vertical groove 23 is formed so as to satisfy the relationship of the following equation.
0.30 <(a / b) <0.80
A more preferable range of (a / b) is 0.40 to 0.70.

Regarding the fastening mechanism 17 for providing the mounting base material 16, the receiving metal fitting 20 is formed in a rectangular shape in a plan view and has a substantially V-shaped cross section so as to follow the shape of the first hollow portion 2A as shown in FIG. The receiving metal fitting 20 is installed in the first hollow portion 2A having a substantially triangular cross section so as to match the inclined surface, and its movement and rotation in the horizontal direction are restricted. The receiving metal fitting 20 is provided with a screw portion 20a. The anchor metal fitting 21 which is a full-threaded bolt penetrates the surface side base material 1b at the groove bottom 23h of the vertical groove 23 corresponding to the first hollow portion 2A and is screwed into the screwed portion 20a of the receiving metal fitting 20.

The base plate 22 is formed in a vertically elongated plate shape as shown in FIG. 5 and the like. As shown in FIG. 1, the base plate 22 is in contact with the surface 1h of the extruded cement plate 1, and the anchor metal fitting 21 penetrates the base plate 22. By screwing and tightening the nut 24 from the front end of the anchor metal fitting 21, the base plate 22 is tightly bound to the surface side base material 1b of the extruded cement plate 1, and the receiving metal fitting 20 is fixed in the first hollow portion 2A. As shown in FIG. 6, the base plate 22 is installed so as to straddle the vertical groove 23. That is, only the horizontal end portions 22a of the base plate 22 are in contact with the surface 1h of the extruded cement plate 1, and the central portion 22b is not in contact with the surface 1h due to the presence of the vertical groove 23.

In the present embodiment, the fastening mechanism 17 for providing the mounting base material 16 is configured only in the vertical groove 23 in the substantially central portion in the horizontal direction among the plurality of vertical grooves 23 formed in the extruded cement plate 1. ing. That is, a plurality of anchor metal fittings 21 of these fastening mechanisms 17 are provided in the same vertical groove 23. As shown in FIG. 5, mounting base materials 16 having an L-shaped cross section continuous in the horizontal direction are fixed to the plurality of base plates 22 by welding. The vertical positions of the fastening mechanisms 17 configured on the extruded cement plates 1 arranged in the horizontal direction are the same, and the mounting base materials 16 are installed in a horizontal state.

As shown in FIGS. 1 and 2, an S-shaped fastener member 25 is attached to a predetermined portion of the attachment base material 16. The mounting base material 16 is formed with a mounting hole for passing the mounting bolt 26, and the fastener member 25 is formed with a cross-shaped mounting hole 25a as shown in FIG. The fastener member 25 is attached to the mounting base material 16 by passing the mounting bolts 26 through the mounting holes 25a of the fastener member 25 and the mounting holes of the mounting base material 16 and tightening them with the nuts 27. Since the mounting holes 25a of the fastener member 25 are formed in a cross shape, a minute position and movement of the fastener member 25 with respect to the mounting base material 16 are allowed.

In the upper structure of the upper and lower structures of FIG. 1, the lower end pin 28 facing upward is fixed to the portion of the fastener member 25 where the finishing material 15 is arranged. In the lower structure of FIG. 1, a pin area 29 is formed in the portion of the fastener member 25 where the finishing material 15 is arranged, as shown in FIG. 2, and the upper end pin used together with the fastener member 25 is formed in this pin area 29. A horizontally long pin hole 31 that penetrates the 30 is formed.

The finishing material 15 having the upper structure in FIG. 1 is positioned by inserting the lower end pin 28 of the fastener member 25 into the lower end 15a thereof. The lower finishing material 15 in FIG. 1 is positioned by inserting the upper end pin 30 into the pin hole 31 of the fastener member 25 and inserting it into the upper end 15b. The end faces 15a and 15b of the upper and lower finishing materials 15 and 15 meet with each other, and the upper and lower fastener members 25 are sandwiched. As a result, the upper and lower finishing materials 15 and 15 are attached to the surface 1h of the extruded cement plate 1. Since the upper end pin 30 used together with the lower fastener member 25 is passed through the horizontally long pin hole 31, the lower finishing material 15 is displaceably attached to the mounting base material 16.

In the cross-sectional view of FIG. 4 showing the mounting structure c2 of the finishing material provided in the intermediate portion, the fastener member 35 is formed in a flat plate shape. A lower end pin 36 that faces upward is fixed to the portion where the finishing material 15 is arranged on the fastener member 35. Further, the fastener member 35 has a pin area formed in a portion where the finishing material 15 is arranged, and a horizontally long pin hole is formed in the pin area through which the upper end pin 37 used together with the fastener member 35 is passed. Has been done.

The upper finishing material 15 in FIG. 4 is positioned by inserting the lower end pin 36 of the fastener member 35 into the lower end 15a thereof. The lower finishing material 15 in FIG. 4 is positioned by inserting the upper end pin 37 into the pin hole of the fastener member 35 and inserting it into the upper end 15b. The end faces 15a and 15b of the upper and lower finishing materials 15 and 15 meet with each other, and the fastener member 35 is sandwiched. As a result, the upper and lower finishing materials 15 and 15 are attached to the surface 1h of the extruded cement plate 1. Since the upper end pin 37 used together with the fastener member 35 is passed through a horizontally long pin hole, the lower finishing material 15 is displaceably attached to the mounting base material 16. In the intermediate portion shown in FIG. 4, the configuration is shown in FIG. 1 except that the upper and lower finishing materials 15 and 15 are arranged by using one fastening mechanism 17, the mounting base material 16, the fastener member 35, and the like. Similar to the configuration.

In the finishing material mounting structures c1 and c2 of the present embodiment, a vertical groove 23 extending in the vertical direction is formed on the surface side of each extruded cement plate 1, and the finishing material 15 is mounted in the vertical groove 23. Anchor metal fittings 21 of the fastening mechanism 17 of the above are provided. When bending deformation occurs in the extruded cement plate 1 due to an external force, the degree of stress increases as the portion is farther from the horizontal line z passing through the center of gravity. When bending deformation is applied to the surface side of the extruded cement plate 1 in which the vertical groove 23 is formed so as to apply a tensile force, the surface portion becomes the maximum stress generation position, and the groove bottom 23h of the vertical groove 23 and its vicinity The resulting stress is smaller than the surface portion.

That is, even if there is a hole-drilling defect in the vertical groove 23 for penetrating the anchor metal fitting 21, stress is concentrated on the surface portion without the hole-drilling defect during bending deformation, etc. It consists of parts. When a hole is made in the smooth surface of a conventional extruded cement plate, the strength is reduced by about 30% due to stress concentration on the portion. In the extruded cement plate 1 used for the mounting structures c1 and c2 of the finishing material of the present embodiment, since holes are formed in the vertical grooves 23 where stress is not concentrated, such a decrease in strength does not occur. As a result, the strength does not decrease due to stress concentration due to the drilling defect.

Therefore, the allowable stress of the extruded cement plate 1 can be maintained, and the design can be performed without lowering the allowable stress. It is not necessary to reduce the support span of the extruded cement plate 1, and the degree of freedom in the construction of the extruded cement plate 1 can be maintained even when the finishing material 15 is attached. For example, it is vertically installed in a building having a large floor height. It becomes possible to do.

The extruded cement plate 1 with flutes in FIG. 3 used for the finishing material mounting structures c1 and c2 of the present embodiment, and the extruded cement shown in FIG. 11 without flutes used for the conventional finishing material mounting structure. The support span of the plate 100 was calculated. In each case, a thickness of 80 mm was used. FIG. 7 is a graph comparing the support spans of both extruded cement plates. Although it depends on the wind pressure, the support span of the extruded cement plate 1 used for the finishing material mounting structures c1 and c2 is about 20% larger than the support span of the conventional extruded cement plate 100 in which a hole is formed on the surface. It is recognized that it is doing. From this result, in the extruded cement plate 1 used for the mounting structures c1 and c2 of the finishing material of the present embodiment, the support span can be expanded by about 20% as compared with the conventional case.

Conventionally, in order to secure the support span of the extruded cement plate when the finishing material is attached, the thickness of the extruded cement plate may be increased in the design. As a result, the manufacturing cost of the extruded cement board has increased, and the construction cost has increased due to the increase in the weight of the extruded cement board.

By using the finishing material mounting structures c1 and c2 of the present embodiment, the support span can be maintained without increasing the thickness of the extruded cement plate even when the finishing material 15 is mounted, and the manufacturing cost and construction can be maintained. It does not lead to an increase in cost. In order to form the vertical groove 23 on the extrusion-molded cement plate 1, it is only necessary to change the shape of the base of the extrusion molding machine, and the production cost does not increase due to the formation of the vertical groove 23. Therefore, the degree of freedom in the construction of the extruded cement plate can be maintained without inviting an increase in cost.

It has been found that the difference in the degree of stress generated between the surface portion and the groove bottom portion of the extruded cement plate 1 corresponds to the distance from the horizontal line z passing through the center of gravity. Therefore, the bending stress of the surface portion of the extruded cement plate 1 can be calculated from the dimensions and the centroid of the vertical groove 23 of the extruded cement plate 1, and the strength design of the extruded cement plate 1 having the vertical groove 23 formed can be determined. It becomes possible to do. In the present embodiment, the distance from the groove bottom 23h of the vertical groove 23 to the horizontal line z passing through the centroid of the extruded cement plate 1 is defined as a, and the distance from the surface 1h of the extruded cement plate 1 to the horizontal line z is defined as b. Then, (a / b) is 0.3 to 0.80, and the strength of the extruded cement plate 1 is maintained by forming the vertical groove 23 in the numerical range.

A plurality of mounting base materials 16 that are continuous in the horizontal direction are provided at predetermined intervals in the vertical direction, and the finishing material 15 is mounted on these mounting base materials 16. Therefore, as shown in FIG. 8, since the plurality of extruded cement plates 1 can be displaced between layers with the locking block as the fulcrum 32, the plurality of finishing materials 15 are displaced in the horizontal direction together with the mounting base material 16. As a result, even when a plurality of finishing materials 15 are attached across the joints of the extruded cement plate 1, damage to each finishing material 15 can be prevented. Therefore, it is possible to eliminate the limitation on the allocation of the finishing material 15.

Since the mounting base material 16 is mounted at a position separated from the receiving metal fitting 20 installed in the first hollow portion 2A with the vertical groove 23 in between, the base plate 22 can be mounted by elastic pressure contact force, and the anchor The tightening torque of the nut 24 of the metal fitting 21 can be easily adjusted, which facilitates the construction. Since a plurality of fastening mechanisms 17 are configured in each extruded cement plate 1, and a plurality of anchor fittings 21 of these fastening mechanisms 17 are provided in the same vertical groove 23, the plurality of extruded cement plates 1 can be formed. Even when the layers are displaced between the layers, the plurality of mounting base materials 16 swing in the horizontal direction while maintaining the parallel state with each other. Therefore, the influence of the interlayer displacement of the plurality of extruded cement plates 1 on the finishing material 15 becomes smaller, and damage to the finishing material 15 can be reliably prevented.

Since the vertical groove 23 is formed in a substantially central portion in the horizontal direction of each extruded cement plate 1, the mounting base material 16 for mounting the finishing material 15 can be smoothly swung in the horizontal direction. Since the base plate 22 of the fastening mechanism 17 is installed so as to straddle the vertical groove 23, the contact area between the extruded cement plate 1 and the base plate 22 fastened by the anchor metal fitting 21 becomes small, and the base plate 22 moves. It's easier. Therefore, when the plurality of extruded cement plates 1 are displaced between layers, the base plate 22 follows and moves, and the mounting base material 16 can be swung more smoothly in the horizontal direction.

The receiving metal fitting 20 is formed in a substantially V-shaped cross section so as to follow the shape of the first hollow portion 2A formed in a substantially triangular cross section narrowing toward the vertical groove 23, and the receiving metal fitting 20 is formed in a horizontal direction. Movement and rotation are restricted. The first hollow portion 2A is formed in such a size that both outer edges a2 in the horizontal direction do not intersect the second hollow portion 2B which is another hollow portion on both sides in the thickness direction of the extruded cement plate. As a result, the reliability of the fastening mechanism 17 can be improved. Further, since the vertical groove 23 is formed with a width t2 equal to or less than the width t1 of the first hollow portion 2A, the strength of the vertical groove 23 can be reliably maintained.

Since the finishing material 15 is displaceably mounted with respect to the mounting base material 16, even when the mounting base material 16 swings in the horizontal direction, the displacement is absorbed and the influence of the swing on the finishing material 15 Can be reduced. Since the locking block 10 is provided at the lower center in the width direction of each extruded cement plate 1, the extruded cement plate 1 can be displaced between layers with the locking block 10 as a fulcrum. Since the extruded cement plate 1 can be displaced between layers with the locking block 10 as a fulcrum and the vertical groove 23 is formed at a substantially central portion in the horizontal direction of each extruded cement plate 1, it is attached for attaching the finishing material 15. The base material 16 can be swung more smoothly in the horizontal direction.

The present invention is not limited to the above embodiment. The disclosed embodiment is an example of the mounting structure of the finishing material according to the present invention, and is not limiting. The mounting structure of the extruded cement plate to which the mounting structure of the finishing material of the present invention is applied is not limited. Extruded cement board used for mounting structure of finishing material, square nut, clip, mounting bolt, etc. for mounting extruded cement board, receiving metal fittings for mounting finishing material, anchor metal fittings, base plate, mounting base material, fastener The members and other members provided as needed may be in any form as long as the effects of the present invention are not impaired. In order to swing the mounting base material more smoothly, a plate or packing for reducing friction may be sandwiched between the extruded cement plate and the base plate. Examples of the plate for reducing friction include a plate made of fluororesin and a plate made of polyethylene.

Various shapes can be used as the extruded cement plate for forming the flutes. The shape of the flute is not limited, and the flute may have a curved cross section, or the side surface of the flute may be inclined toward the bottom of the flute so that the flute may have a trapezoidal cross section. The shapes and sizes of the plurality of flutes formed on one extruded cement plate may be different from each other. For example, when three vertical grooves are formed on an extruded cement plate, the vertical grooves on both sides of the vertical groove formed in the central portion in the horizontal direction may be made smaller than the vertical grooves in the central portion in the horizontal direction. The number and shape of the hollow portions of the extruded cement plate are not limited.

FIG. 9 is a plan view showing a modified example of the extruded cement plate, and FIG. 10 is a plan view showing another modified example of the extruded cement plate. In the extruded cement plate 40 of FIG. 9, the first hollow portion 42A corresponding to the vertical groove 41, the other second hollow portion 42B, and the like are all formed in a square shape. The number of vertical grooves 41 formed in the extruded cement plate 40 of this example is two. In the above-described embodiment and the extruded cement plates 1 and 40 of FIG. 9, an example in which the width of the vertical grooves 23 and 41 is narrower than the width of the base plate 22 on which the vertical grooves 23 and 41 are installed is shown, but as in the extruded cement plate 45 of FIG. The width of the flute 46 may be wider than the width of the base plate 22. In this example, the base plate 22 is housed in the flutes 46. If the base plate 22 is housed in the vertical groove 46, for example, an L-shaped base plate whose lower portion is bent inward can be installed, and the lower portion can be joined to the base material of the extruded cement plate.

1, 40, 45 Extruded cement board 1a, 1b Back side base material, front side base material 1h Surface 2A, 2B 1st hollow part, 2nd hollow part a2 Horizontal outer edge 3 Frame 4 L-shaped angle 5 Receiving angle 6 Hard Packing 7 Mounting bolt 8 Square nut 9 Z clip 10 Locking block 15 Finishing material 15a, 15b Lower end, upper end 16 Mounting base material 17 Retaining mechanism 20 Receiving metal fittings 21 Anchor metal fittings 22 Base plate 23, 41, 46 Vertical groove 23h Groove bottom 24 Anchor Metal fitting nuts 25, 35 Fastener members 26 Mounting bolts 27 Nuts 28, 36 Lower end pins 29 Pin areas 30, 37 Upper end pins 31 Pin holes 100 Conventional extruded cement plates c1, c2 Finishing material mounting structure t1 First hollow part Width t2 Vertical groove width z Horizontal line passing through the centroid a Distance from the bottom of the groove to the horizontal line passing through the centroid b Distance from the surface of the extruded cement plate to the horizon

The present invention relates to an extruded cement plate used for an attachment structure for attaching a finishing material which is a surface decorative material to the surface of an outer wall material attached to a building frame, and particularly due to a hole drilling defect in the extruded cement plate. The present invention relates to an extruded cement plate used for a mounting structure of a finishing material capable of preventing a decrease in strength due to stress concentration.

Therefore, in view of the problems of the prior art, the present invention provides an extruded cement plate used for a mounting structure of a finishing material capable of eliminating the limitation of allocation of the finishing material and maintaining the allowable stress of the extruded cement plate. With the goal.

The extruded cement plate of the present invention is an extruded cement plate in which a hollow portion in which a receiving metal fitting for fastening a mounting base material for a finishing material is installed and other hollow portions are arranged side by side in one direction. A vertical groove extending along the longitudinal direction of the hollow portion is formed on the surface side so as to correspond to the hollow portion in which the receiving metal fitting is installed, and the hollow portion in which the receiving metal fitting is installed is the vertical portion. The cross section narrowed toward the groove is formed in a substantially triangular shape, and has a size that does not intersect the other hollow portions on both sides in the thickness direction of the extruded cement plate, and the width of the vertical groove is the cross section of the hollow portion. It is characterized in that it is smaller than the widest width constituting the base on the side far from the vertical groove having a substantially triangular shape, and the difference between the vertical groove width and the hollow portion width is about 10% of the hollow portion width. Is.

According to the onset bright, the surface side of the press-molded cement board, longitudinal grooves extending along the longitudinal direction of the hollow portion is formed, in the longitudinal groove, the hooking mechanism for attaching a finishing anchor The metal fittings can be provided , and the strength does not decrease due to stress concentration due to the drilling defect. Therefore, the allowable stress of the extruded cement plate can be maintained, and the design can be performed without lowering the allowable stress. As a result, it is not necessary to reduce the support span of the extruded cement plate, and the degree of freedom in the construction of the extruded cement plate can be maintained even when the finishing material is attached .

The plurality of vertical grooves formed are formed at equal intervals in the width direction.
The width of the flute is four times or more the depth of the flute.

Claims (6)

It is a finishing material mounting structure in which a plurality of extruded cement plates in which a plurality of hollow portions are arranged side by side in one direction are attached to the building frame in a vertically stretched state, and a finishing material is attached to the surface of these extruded cement plates. ,
A plurality of horizontally continuous mounting base materials are provided on the surface of the plurality of extruded cement plates via a fastening mechanism at predetermined intervals in the vertical direction.
The fastening mechanism includes a receiving metal fitting installed in any of the hollow portions, an anchor metal fitting that is screwed into the receiving metal fitting and penetrates the surface side base material of the extruded cement plate, and the anchor metal fitting. In the mounting structure of the finishing material, which has a base plate that is tightly bound to the surface-side base material and to which the mounting base material is fixed.
A vertical groove extending in the vertical direction is formed on the surface side of each extruded cement plate, and an anchor metal fitting of the fastening mechanism is provided in the vertical groove.
A finishing material mounting structure, wherein the base plate of the fastening mechanism is installed in a state of straddling the vertical groove with a space in the vertical groove, and the base plate is tightly connected to the outside of the vertical groove. The first aspect of the present invention, wherein a plurality of the fastening mechanisms are configured in each of the extruded cement plates, and a plurality of the anchor fittings of the fastening mechanisms are provided in the same vertical groove. Finishing material mounting structure. The finishing material mounting structure according to claim 1 or 2, wherein the flute is formed at a substantially central portion in the horizontal direction of each extruded cement plate. Any of the hollow portions in which the receiving metal fitting of the fastening mechanism is installed is formed in a substantially triangular cross section narrowing toward the vertical groove, and the receiving metal fitting follows the shape of the hollow portion. The hollow portion is formed in a substantially V-shaped cross section, and the hollow portion has a size in which both outer edges in the horizontal direction do not intersect with the other hollow portions on both sides in the thickness direction of the extruded cement plate, and the vertical groove is one of the above. The attachment of the finishing material according to any one of claims 1 to 3, wherein the hollow portion is formed with a width equal to or less than the widest width constituting the base on the side far from the vertical groove having a substantially triangular cross section. Construction. The mounting structure for a finishing material according to any one of claims 1 to 4, wherein the finishing material is displaceably mounted with respect to the mounting base material. The finishing material mounting structure according to any one of claims 1 to 5, wherein a locking block is provided at a lower center in the width direction of each extruded cement plate.

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