JP2005016074A - Cement inorganic plate and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cement inorganic plate and its construction method having good weatherability without intrusion of rain water to the rear face by capillary action even if the thickness of a lap siding is thin and hardly causing a crack. <P>SOLUTION: In the cement inorganic plate having 4 to 8 mm in thickness with 1.2 to 1.7 of specific gravity, a horizontal groove section is provided to an upper side of the surface in the longitudinal direction of the plate and, at the same time, it is piled up and stuck on the lower side of the surface by using the cement inorganic plate having a vertical embossed pattern in the vertical direction of the plate. The cement inorganic plate is manufactured by wet paper-making, the vertical embossed pattern in the vertical direction of the plate is pushed in parallel with the paper-making direction of the wet paper-making, there are the vertical embossed pattern with a deep pattern and the vertical embossed pattern with a shallow pattern in the vertical embossed patter in the vertical direction of the plate, and the cement inorganic plate certainly has the vertical embossed pattern with the shallow pattern in at least one side in both right and left sides of the vertical embossed pattern with the deep pattern. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cement-based inorganic board mainly used for an outer wall and a construction method thereof.
[0002]
BACKGROUND OF THE INVENTION
There is a so-called lap siding overlaying method that does not have a real part for bonding on the left or right and / or top and bottom, and is constructed by overlaying the lower end of the upper plate on the upper end of the lower plate as the construction of the cement-based inorganic board. is there.
[0003]
[Prior art]
As this lap siding overlaid construction method, there is a construction method in which the lower end side of the upper plate is overlapped with the upper end of the groove portion of the lower plate to give a sense of thickness of the plate.
[0004]
Further, in order to prevent capillary action from the lower plate and prevent rainwater from flowing into the back surface, sealing is also performed on the contact portion of the upper plate with the upper end of the lower plate on the back surface.
[0005]
[Patent Document 1]
Japanese Utility Model Publication No.59-63147 [Patent Document 2]
Japanese Utility Model Publication No. 63-23426 [0006]
[Problems to be solved by the invention]
However, when the thickness of the lap siding is 10 mm or more, the sealing is easy to fill, and there is no problem, but when the thickness of the plate is thin, the sealing is difficult to fill.
[0007]
In addition, embossing such as wood grain is performed as a pattern on the surface of the plate for improving the appearance design.
However, depending on the direction in which this embossed pattern was formed, there was a possibility that the plate would crack.
That is, when a cement-based inorganic board is manufactured by wet papermaking, the reinforcing fibers contained in the slurry are easily oriented parallel to the papermaking direction.
Therefore, when the plate is taken horizontally in the direction perpendicular to the paper making direction, the bending strength in the direction parallel to the paper making direction in which the reinforcing fibers are oriented is larger than the bending strength in the direction perpendicular to the paper making direction in which the reinforcing fibers are oriented. The strength may be slightly low, and if vertical embossing is performed in the vertical direction of the plate, an embossing load is applied in parallel to the direction in which the reinforcing fibers are oriented, so that cracks may enter the vertical direction.
Further, when a plate is attached to the base material by screwing or nailing, since the reinforcing fibers are oriented in the vertical direction with a short plate length, there is a possibility that cracks enter the vertical direction.
The object of the present invention is to provide a cement that is light and weather-resistant with no wrap-around to the backside of rainwater due to capillary action even when the lap siding thickness is thin, and is less prone to cracking even if an embossed pattern is provided. An inorganic board and its construction method are provided.
[0008]
[Means for Solving the Problems]
[0009]
In order to solve the above problems, the invention according to claim 1 is a cement-based inorganic board having a specific gravity of 1.2 to 1.7 and a thickness of 4 to 8 mm. This is a cement-based inorganic board provided with a horizontal groove portion in the left-right direction and provided with a vertical embossed pattern in the vertical direction of the board on the lower side of the surface.
According to the above configuration, since the specific gravity is high, the weather resistance is good, and the thickness is thin, so when constructed in a lap shape, the inclination angle of the cement-based inorganic board with respect to the ground becomes small, and rainwater is unlikely to stagnate on the board surface. There is no wraparound to the back of rainwater.
Furthermore, since the horizontal groove is applied over the entire width in the left-right direction of the plate, which is the direction perpendicular to the vertical embossed pattern direction, the vertical stress due to the vertical embossing load applied in the vertical direction of the plate Since it can be relaxed and dispersed by the lateral stress due to the provision of, a cement-based inorganic board that is hard to crack and is rich in design can be obtained.
Even if fine cracks are generated in the vertical direction by embossing, the extension of the fine cracks is prevented by the lateral grooves provided in the horizontal direction.
[0010]
In the invention according to claim 2, the cement-based inorganic board is manufactured by wet papermaking, and the vertical embossed pattern in the vertical direction of the board is pressed parallel to the papermaking direction of the wet papermaking. It is an inorganic board.
According to said structure, since it is manufacture by wet papermaking, compared with a dry-type manufacturing method or a casting manufacturing method, an installation is simple and productivity is good.
[0011]
In the invention according to claim 3, the vertical embossed pattern in the vertical direction of the plate has a deep vertical embossed pattern and a shallow vertical embossed pattern on the left and right sides of the deep vertical embossed pattern. It is a cement-based inorganic board in which a vertical embossed pattern with a shallow pattern is always provided on at least one side.
According to said structure, the crack is not produced in the surface by disperse | distributing and relieving the partial longitudinal stress by the deep embossed pattern load of a deep pattern entirely by the vertical embossed pattern load stress of a shallow pattern.
[0012]
Further, in the invention according to claim 4, the lower cement-based inorganic plate is fixed to the base material by screwing or nailing the lateral groove portion, and the upper cement-based inorganic plate is screwed or nailing to the horizontal groove portion. It is fixed to the base material by striking, and it is constructed so that the lower end side of the upper cement-based inorganic board is placed beyond the lateral groove part of the lower cement-based inorganic board, and the construction is repeated sequentially in the same manner. It is the construction method of the cement-type inorganic board to do.
According to the above configuration, since the impact force of screwing or nailing is not transmitted to the vertical embossed pattern on the surface because the screwing or nailing is performed in the lateral groove portion, a cement-based inorganic material that is hard to crack and is rich in design Even if the plate is not sealed, it can be constructed with good weather resistance.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described.
[Raw material for cement-based inorganic board]
The cement-based inorganic board used in the present invention is manufactured from a hydraulic inorganic material mainly composed of cement. Examples of the main component cement include Portland cement, blast furnace slag cement, fly ash cement, silica cement, There are cements such as alumina cement and white cement.
Two or more of these cements may be used in combination.
Further, in addition to the main component cement, a wood reinforcing material, an aggregate causing a calcium reaction, and other third components may be mixed.
As the wood reinforcing material, for example, wood pulp, dry pulp, wood powder, wood pieces, wood hair, wood fibers, wood fiber bundles and the like are used.
Two or more kinds of the wood reinforcing materials may be mixed.
As the aggregate, for example, quartz sand, quartzite powder, pearlite, shirasu balloon, expanded shale, expanded clay, calcined diatomaceous earth, fly ash, coal galley and the like are used.
Two or more kinds of the aggregates may be mixed.
As the third component, reinforcing materials other than wood, for example, mineral fibers such as sepiolite and wollastonite, synthetic resin fibers such as polypropylene fiber and polyester fiber, calcium formate, magnesium formate, aluminum sulfate, magnesium sulfate, aluminate You may mix hardening accelerators, such as salts and water glass, waterproofing agents, water repellents, etc., such as wax, wax, paraffin, surfactant, and silicon.
[0014]
[Method for producing cement-based inorganic board]
In the present invention, a cement-based inorganic board is produced by wet papermaking.
In the case of wet papermaking, first, a raw material is mixed with water to form a slurry, and the slurry is made into a mat by a flow-on method, a check system, a long-mesh method, or the like.
This mat may be a single layer or a multilayer wound around a making roll or the like.
This mat is pressed at a high pressure of 5 to 20 MPa and cut into product dimensions and then cured and cured, or after pressed and cured, it is cut into product dimensions and cured, and further processed into a product.
It is preferable that curing is performed at 50 to 80 ° C. for 5 to 10 hours, and curing is performed by autoclaving.
The obtained cementitious inorganic board has a lateral groove part on the surface upper side over the left-right direction of the board.
The lateral groove portion may be provided by embossing during pressing, or may be provided by cutting in secondary processing.
[0015]
In order to attach a vertical embossed pattern in the vertical direction on the surface of the cement-based inorganic board, it may be formed with a press die provided with a vertical embossed pattern during pressing.
The outer peripheral shape of the cement-based inorganic board is rectangular, and actual processing is not performed on the upper, lower, left, and right edges.
[0016]
The obtained cementitious inorganic board has a specific gravity of 1.2 to 1.7 and a thickness of 4 to 8 mm.
If the specific gravity is less than 1.2, the weather resistance is deteriorated and a problem occurs as an outer wall. If the specific gravity is greater than 1.7, the cement-based inorganic board becomes too hard and the workability such as screwing and nailing is deteriorated. The problem arises.
Specific gravity here means the absolute dry specific gravity after drying at 105 ° C. for 24 hours.
If the thickness is less than 4 mm, impact resistance and the like are deteriorated, causing a problem as an outer wall. If the thickness is more than 8 mm, the cement-based inorganic board is heavy and does not reduce weight.
[0017]
The width in the vertical direction of the lateral groove is preferably 20 to 50 mm, and the depth of the lateral groove is preferably about 1/8 to 1/4 of the thickness of the cement-based inorganic board.
If the width of the horizontal groove in the vertical direction is less than 20 mm, the effect of suppressing the occurrence of cracks due to the vertical embossed pattern press is small, and when two nails are placed with a constant interval in the vertical direction, There is a risk that the impact will be transmitted to other nailing parts and cracks may occur between the nails, and if it is larger than 50 mm, the upper part of the cement-based inorganic board overlapped with the upper part to hide the lateral groove part. In addition to the deterioration of the properties, the loss of the cement-based inorganic board itself increases.
If the depth of the lateral groove is deeper than 1/4 of the thickness of the cement-based inorganic board, it will lead to strength deterioration of the cement-based inorganic board, and if it is shallower than 1/8, the screw head and nail head will come out of the surface position. .
The position where the lateral groove is formed is preferably 15 to 25 mm below the upper end side of the cement-based inorganic board.
If it is less than 15 mm, there is a risk of causing a strength failure at the upper edge of the cement-based inorganic board. If it is larger than 25 mm, the overlapping part of the upper cement-based inorganic board becomes large and the workability deteriorates, making the cement-based inorganic The loss of the board itself also increases.
It is desirable that the horizontal groove portion itself is not provided with a vertical embossed pattern.
[0018]
The vertical embossed pattern is composed of a deep vertical embossed pattern such as a V-shaped groove or a U-shaped groove and a shallow vertical embossed pattern like a grain.
The maximum depth of the vertical embossed pattern having a deep pattern is preferably shallower than the depth of the lateral groove, and the minimum depth is deeper than the depth of the vertical embossed pattern having a shallow pattern.
Further, it is preferable that the maximum depth of the vertical embossed pattern with a shallow pattern is shallower than the depth of the vertical embossed pattern with a deep pattern, and the minimum is deeper than 1/4 of the depth of the lateral groove portion.
[0019]
Moreover, the vertical embossing pattern may be given also to the plate surface above a horizontal groove part.
In this case, since it can be applied simultaneously with the vertical embossed pattern below the lateral groove portion, the efficiency is good.
Conversely, a horizontal embossed pattern may be provided on the plate surface above the horizontal groove.
In this case, since the handle is applied in the horizontal direction, it is difficult for rainwater to go around the back surface.
[0020]
In addition, the cement-based inorganic plate may be subjected to an alignment mark.
Specifically, a mark for alignment in the left-right direction is applied to the left and right edges directly below the lateral groove portion of the plate, and a mark for alignment in the vertical direction is applied to the center of the upper edge of the plate.
The mark may be a V-shaped, U-shaped notch, or a linear groove press-molded on the surface.
[0021]
[Construction method of cement-based inorganic board]
Next, the construction method of a cement-type inorganic board is demonstrated.
The cementitious inorganic board of the present invention has a shape in which no fruit for bonding is formed on the upper and lower and left and right edges.
First, after constructing a normal drainage, the cement-based inorganic board of the present invention is fixed to the base material by screwing or nailing.
At this time, the screw or nail is struck in a lateral groove portion provided on the upper side of the cement-based inorganic plate surface in the left-right direction of the plate.
Screws or nails are preferably struck at three locations, the left and right ends and the center of the plate.
Next, the next cement-based inorganic board is aligned with the left and right cement-based inorganic boards, and the left and right cement-based inorganic boards are abutted without sealing. Strike.
Next, the same operation as described above is repeated, and a cement-based inorganic board is sequentially constructed to form the first stage (lower stage).
Next, a cement-type inorganic board is constructed on the first stage as the second stage (upper stage).
First, place the lower edge of the upper cement-based inorganic board over the lateral groove of the lower cement-based inorganic board, and then screw or nail it into the horizontal groove of the upper cement-based inorganic board. Construction of cement-based inorganic board.
In this case, it is preferable that the second-stage plate is constructed by being shifted from the first-stage plate by about half of the full width in the left-right direction of the plate in the lateral direction.
After that, as with the lower stage, the left and right cement-based inorganic boards are aligned and installed.
The cement-based inorganic board is constructed by repeating this in the upward direction.
There is no need to seal between the left and right cement-based inorganic plates and between the upper and lower cement-based inorganic plates.
This is because the cement-based inorganic board is thin and has a small inclination angle with respect to the ground when constructed in a lap-like shape. This is because the specific gravity is high and the water permeability is low.
Since no sealing is applied, construction can be performed easily, construction time is shortened, and workability is improved.
[0022]
In addition, the cement-based inorganic board of the present invention has a high specific gravity of 1.2 to 1.7 and a thickness of 4 to 8 mm, which is thin and lightweight, so that not only ordinary outer wall construction, but also mortar outer walls, siding outer walls, etc. It can also be used for renovation work.
In a conventional existing mortar reform, it is impossible to hit an outer wall material for a new reform on the mortar with a nail or a screw because of a problem of holding power.
Therefore, first, a body edge having a thickness of 30 mm or more is struck on the ground structure together with the mortar on the mortar, and an outer wall material for new reform is struck on the body edge.
If the new outer wall material has a thickness of 15 mm or 20 mm, the weight of the outer wall material is heavy, and since there is a thickness, it is necessary to attach a trunk edge of 30 mm or more.
However, since the cement-based inorganic board of the present invention is thin and light in weight, when a barrel edge is applied on an existing mortar, a holding force is obtained with a barrel edge of about 18 mm, and the cost is reduced.
[0023]
【Example】
Examples of the present invention will be given below.
[0024]
FIG. 1 shows a cement-based inorganic board 1 used in the present invention.
It has a rectangular shape with a horizontal width of 910 mm and a vertical width of 300 mm, a thickness of 6 mm, a horizontal groove portion 2 with a vertical width of 37 mm across the left and right at 18 mm from the upper edge, and a vertical embossed pattern 3 with a deep pattern on the surface. A vertical embossed pattern 4 with a shallow pattern is applied.
The deep embossed pattern 3 is a U-shaped groove.
The lateral groove 2 has a depth of about 1 mm as shown in FIG.
Further, the vertical embossed pattern 3 having a deep pattern has a depth of about 0.75 mm, and the vertical embossed pattern 4 having a shallow pattern has a depth of about 0.5 mm.
Since the horizontal groove portion 2 is provided in the left-right direction which hits the vertical direction with the vertical embossed pattern 3 with a deep pattern and the vertical embossed pattern 4 with a shallow pattern, cracks are hardly generated.
[0025]
FIG. 2 shows a part of the manufacturing apparatus for the cement-based inorganic board 1.
This manufacturing apparatus is a wet papermaking apparatus, and a slurry in which water is mixed with raw materials sent from a slurry tank (not shown) to a flow box 20 on a continuous felt 21 tensioned between rolls. S is flown and suction dewatered from the back side of the continuous felt 21 with a suction box 13 to form a single-layer mat M. When the roll is wound around the making roll 22 and reaches a predetermined thickness, the making roll 22 Cut and peel off to obtain a laminated mat M ′.
Thereafter, as shown in FIG. 3, the laminated mat M ′ is punched out so as to be elongated in the direction perpendicular to the papermaking direction Y of the laminated mat M ′.
At this time, the laminated mat M ′ has reinforcing fibers oriented parallel to the papermaking direction Y.
Therefore, after punching, the reinforcing fibers are oriented in parallel to the narrow direction of the cement-based inorganic board 1.
Simultaneously with the punching, high pressure pressing is performed on the laminated mat M ′ at a pressure of 10 MPa.
At this time, the shape corresponding to the horizontal groove part 2, the deep vertical embossed pattern 3 with a pattern, and the vertical embossed pattern 4 with a shallow pattern is given to the press upper board.
Thereafter, it is cured at 50 ° C. for 6 hours, and further autoclaved at 180 ° C. for 6 hours to obtain a product.
[0026]
FIG. 4 shows a construction structure from the front side of the cement-based inorganic board 1.
The positions of screwing or nailing are applied to the left and right portions that are 30 mm or more inside from the left and right edges of the cement-based inorganic plate 1 and the lateral groove portion 2 at the substantially central portion of the cement-based inorganic plate 1.
In the case of screw driving, it hits the central portion of the vertical width of the lateral groove 2.
Therefore, it is fastened to the base material 7 with three screws 5 on one cement-based inorganic board 1.
The screw 5 is preferably a 4.2φ × 22 mm flat head screw.
By using the flat head screw, the screw 5 is prevented from protruding to the surface side from the portion other than the lateral groove portion 2.
[0027]
Fig. 5 shows a construction reference diagram when nailing.
In the case of nailing, nailing is performed in three places in the horizontal direction in the same manner as in the case of screwing.
In this case, the interval is preferably 18-30 mm up and down.
If the distance is 18 mm or less, the impact at the time of nailing is transmitted to other nailing portions, and as a result, there is a risk of cracks occurring between the nail 6 and the nail 6 '.
Since the horizontal groove 2 has a vertical width of 20 to 50 mm, the nails 6 and 6 ′ can be separated vertically by 18 to 30 mm.
At this time, the nails 6 and 6 ′ may be vertically separated from each other, or may be nailed while being slightly shifted from side to side.
Therefore, it is fastened to the base material 7 with six nails on one cement-based inorganic board 1.
By hitting two nails 6 and 6 'up and down, there is a slight gap between the lateral groove portion 2 of the lower cementitious inorganic plate 1 and the lower end side of the upper cementitious inorganic plate 10, so that capillary action occurs. Hateful.
The nails 6, 6 'are preferably stainless steel ring nails of 2.3φ × 38mm.
The left and right cement-based inorganic plates 1 are joined together by aligning the left-side cement-based inorganic plate 1 and the right-side cement-based inorganic plate 1 without sealing.
Similarly, the next cement-based inorganic board 1 is constructed.
In this way, the first stage (lower stage) is set.
[0028]
FIG. 6 shows the construction structure of this cement-based inorganic board overlaid.
The cement-based inorganic board 10 is constructed on the lower-stage cement-based inorganic board 1 as the second stage (upper stage).
First, the lower end side of the upper cement-based inorganic board 10 is overlapped over the lateral groove 2 of the lower cement-type inorganic board 1, and the upper cement-type inorganic board 10 is further centered on the upper end side of the lower-stage cement-based inorganic board 1. In this state, the upper cementitious inorganic board 10 is constructed by screwing or nailing it into the lateral groove 2 of the upper cementitious inorganic board 10.
Thereafter, as in the lower stage, the left and right cement-based inorganic plates 10 are aligned and applied.
Repeat it in the upward direction.
There is no need to seal between the left and right cement-based inorganic plates and between the upper and lower cement-based inorganic plates.
This is because the thickness of the cement-based inorganic board is thin and rainwater is less likely to stagnate at the lower end of the board, and at the same time the specific gravity of the cement-based inorganic board is high and the water permeability is low.
The tilt angle of the cemented inorganic board with respect to the outer wall surface is about 4 °.
[0029]
FIG. 7 shows another embodiment of the cement-based inorganic board.
In this case, the deep vertical embossed pattern of the pattern is a deep groove in the grain, and the shallow vertical embossed pattern in the pattern is a shallow groove of the grain.
[0030]
【The invention's effect】
According to the first aspect of the present invention, since the specific gravity is high, the weather resistance is good and the thickness is thin. Therefore, when constructed in a lap shape, the inclination angle of the cement-based inorganic board with respect to the ground becomes small, and rainwater is formed on the board surface. Since it does not stagnate, there is no wraparound to the back of rainwater, and the lateral groove is applied in the direction perpendicular to the vertical embossed pattern direction, so that it is possible to obtain a cement-based inorganic board that is hard to crack and is rich in design. I can do it.
[0031]
Further, according to the invention described in claim 2, since it is manufactured by wet papermaking, the equipment is simple and the productivity is good as compared with the dry manufacturing method and the casting manufacturing method.
[0032]
Further, according to the invention described in claim 3, cracks are generated on the surface by dispersing and alleviating the partial longitudinal stress due to the deep vertical embossed pattern load of the pattern with the shallow vertical embossed pattern load stress of the pattern. Does not cause.
[0033]
Further, according to the invention described in claim 4, since the screwing or nailing is performed in the lateral groove portion, the impact force of the screwing or nailing is not transmitted to the vertical embossed pattern on the surface, so that the design is difficult to crack. It is possible to construct a cement-based inorganic board rich in properties with good weather resistance without sealing.
[Brief description of the drawings]
FIG. 1 is a front view and a right side view of a cement-based inorganic board used in the present invention. FIG. 2 is a reference diagram showing a part of a method for producing a cement-based inorganic board used in the present invention. Fig. 4 Front view of the construction structure of the cement-based inorganic board used in the present invention. Fig. 5 Reference diagram of the construction when nailing the cement-based inorganic board used in the present invention. [Fig. 6] Reference drawing of the superposition of the cement-based inorganic board used in the present invention. [Fig. 7] Another embodiment of the cement-based inorganic board used in the present invention.
DESCRIPTION OF SYMBOLS 1, 10 Cement-type inorganic board 2 Horizontal groove part 3 Embossed pattern with deep pattern 4 Embossed pattern with shallow pattern 5 Screw 6 Nail 7 Base material 13 Suction box 20 Flow box 21 Felt 22 Making roll S Slurry
M Single layer mat M 'Laminated mat Y Paper making direction

Claims (4)

In a cement-based inorganic board having a specific gravity of 1.2 to 1.7 and a thickness of 4 to 8 mm, a lateral groove is provided on the upper side of the surface in the left-right direction of the board and the upper and lower sides of the board are provided on the lower side of the surface. Cement-based inorganic board with vertical embossed pattern in the direction The cement-based inorganic board according to claim 1, wherein the cement-based inorganic board is manufactured by wet papermaking, and the vertical embossed pattern in the vertical direction of the board is pressed parallel to the papermaking direction of the wet papermaking. 3. The vertical embossed pattern in the vertical direction of the plate according to claim 1, wherein the vertical embossed pattern has a deep vertical embossed pattern and a shallow vertical embossed pattern, and at least one side of the left and right sides of the deep vertical embossed pattern. Is always a cement-based inorganic board with a shallow embossed pattern The construction method using the cement-based inorganic board according to claim 1, 2 or 3, wherein the lower-stage cement-based inorganic board is fixed to the base material by screwing or nailing the lateral-groove portion, and the upper-stage cement The base inorganic plate is screwed or nailed into the lateral groove portion and fixed to the base material, and the lower end side of the upper cement-based inorganic plate is placed beyond the lateral groove portion of the lower cement-based inorganic plate, A method for constructing a cement-based inorganic board characterized by repeating construction in the same manner

Images