JP2002349020A - Sash bar for construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sash bar for construction that controls the deterioration of the strength of grooved parts and its manufacturing method. SOLUTION: A sash bar for construction is provided with grooves for water flow or for air flow on at least one side and is characterized by its higher density of the grooved parts than that of the other parts of the bar. This sash bar for construction is manufactured by a method that includes a process of forming the grooves by pressing a stick-shaped resin body that contains voids.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crosspiece made of a resin material having a void and used in the construction field.
The architectural crosspiece of the present invention is suitable mainly as a base material such as a tile crosspiece for fixing a tile to a roof of a house or a rim for fixing an exterior material to a wall surface.

[0002]

2. Description of the Related Art Conventionally, wooden or resin foam tile bars have been used for fixing tiles to a roof of a house. The roof tiles are struck on the upper surface of the roof base plate at predetermined intervals in parallel with the eaves lines, so that the roof tiles are hung.

By the way, on the back side of the tile, there is a risk that water due to dew condensation or rainwater that has entered from a joint between adjacent tiles may accumulate on the tile crossing. Grooves are provided.

Further, in order to fix an exterior material to a wall surface of a house or the like, a rim made of wood or resin foam is used. The body edge is provided with a groove on the front surface or the back surface for ventilation between the exterior material and the wall surface.

[0005] Since such roof tiles and body edges are not easy to replace once constructed, those made of resin foam which is hard to corrode are often used, and usually, a long extruded resin foam is used. It is manufactured by providing the above-mentioned groove in a formed body by cutting.

[0006] However, resin foam molded articles are usually
Since it is formed so as to be denser near the surface, and the inside is brittle, the above-mentioned cutting process causes a problem that the dense portion of the surface is cut and the strength of the groove forming portion is reduced.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a cross beam for a building in which a decrease in strength of a groove forming portion is suppressed and a method for manufacturing the same. It is in.

[0008]

The architectural crosspiece according to the present invention, which has achieved the above object, has a groove for water passage or ventilation provided on at least one surface thereof, and has a gap used for a base material for building. An architectural crosspiece made of an encapsulating resin molded article, having a gist in a place where the density of a groove forming part is higher than the density of other parts. FIG. 1 shows an example of a building crosspiece of the present invention. For example, for the second groove from the left, the above-mentioned “groove forming portion”
The hatched portion in the figure means.

The above-mentioned "void-filled resin molded product" is a resin molded product having a void therein, and includes, for example, a so-called resin foam molded product obtained by extrusion foam molding using a foaming agent.

In the architectural crosspiece according to the present invention, an inclined surface is formed in a direction from the corner of at least one end face of the groove to the corner of a non-groove portion following the corner, toward the bottom of the groove. It is preferred that it is.

Further, in the architectural crosspiece of the present invention, a groove is provided on one surface, and a mark for visually discriminating a groove-formed portion and a groove-non-formed portion is attached to one of the other surfaces. Preferably, furthermore, a groove is provided on one surface,
It is recommended that an uneven strip is provided on a surface opposite to the surface provided with the grooves, in parallel with the longitudinal direction of the resin molding including the voids.

The above-mentioned building crosspiece can be obtained by a manufacturing method including a step of forming a groove by pressing a rod-shaped void-containing resin molded product.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the architectural crosspiece of the present invention is preferably used as an architectural base material such as a tile crosspiece or a rim. In addition, the rim is fixed to a pillar or stud using nails. Therefore, it is required that the void-containing resin molded body constituting the building crosspiece can be nailed.

Examples of the resin capable of forming the resin-molded article including a void-encapsulating resin that can be nailed include low-density polyethylene, high-density polyethylene, polypropylene, a copolymer of ethylene and α-olefin, an ethylene-vinyl acetate copolymer, and ethylene-vinyl acetate.
Polyolefin resins such as acrylonitrile copolymer and ionomer; Polystyrene resins such as polystyrene and acrylonitrile-styrene resin (AS resin); Polyvinyl chloride; Nylon 6, Nylon 66, Nylon 6
Polyamide resins such as 10, nylon 11, and nylon 12; thermoplastic polyester resins such as polyethylene terephthalate and polybutylene terephthalate; polycarbonate, polyphenylene ether, and the like.

Further, when these resins contain a rubber component as fine particles or the like, it is possible to obtain a void-containing resin molded article having good impact resistance, and to suppress cracking at the time of nailing. It is valid. Examples of such a resin include high impact polystyrene (HIPS) containing polybutadiene fine particles, acrylonitrile-butadiene-styrene resin (ABS resin), and the like.

The resin exemplified above is used once as a film or a molded product in addition to a virgin product which has never been molded or the like, and thereafter is recovered as waste, or is used in the production process of the molded product or the like. So-called recycled products collected from off-products and the like can also be used. In addition, the above resins may be used alone or in a combination of two or more, or a mixture of a virgin product and a recycled product may be used. However, when a mixture of two or more resins is used, if these resins are incompatible, the strength of the resulting architectural beam may be reduced. It is preferred that the two or more resins have compatibility to an extent that they are not present.

Further, the above resin contains additives such as a pigment, a heat aging inhibitor, an antistatic agent, a flame retardant, a fungicide, and a lubricant, and a filler such as wood powder, if necessary. You may.

The voids of the void-containing resin molded article according to the present invention may be independent or may be communication holes. That is, the foamed resin molded article, which is an example of the resin molded article containing voids, may have closed cells or may have communication holes. However, in the building crosspiece of the present invention obtained from a void-containing resin molded article having a communication hole, a resin foam molded article, it is feared that rainwater or the like permeates into the inside of the crosspiece. It is recommended to provide a resin layer on the outer peripheral surface of the molded body.

The cross beam for construction of the present invention has a structure in which the density of the groove forming portion is higher than the density of the other portion, that is, the portion where no groove is provided (non-groove forming portion). This suppresses a decrease in strength. Specifically, it is recommended that the ratio of the density of the groove forming portion to the density of the other portion exceeds 1, preferably 1.01 or more, and 5 or less, preferably 3 or less. The ratio of the density of the groove forming portion to the density of the other portions is controlled by the resin used for the void-containing resin molded body described later, the expansion ratio of the void-containing resin molded body, the size (particularly the depth) of the groove to be formed, and the like. it can.

The above-mentioned density ratio is determined for the sample obtained by cutting the groove forming portion (shaded portion in FIG. 1) of the architectural crosspiece and the sample obtained by cutting the other portion to the size corresponding to the groove forming portion.
In accordance with the provisions of ISK 7112, Method A (underwater displacement method)
It can be calculated using the density measured using water as the immersion liquid.

A structure in which the density of the groove forming portion is higher than that of the other portions can be achieved by a manufacturing method including the following steps.

First, a void-containing resin molded article is manufactured. The void-containing resin molded article can be produced, for example, by adding a foaming agent to the above-mentioned resin pellets and the like and extruding and foaming. In the case of extrusion foaming, the foaming agent is not particularly limited, and a known foaming agent may be appropriately selected according to the resin used. For example, organic foaming agents such as azo compound foaming agents such as azodicarbonamide; sulfonyl hydrazide compound foaming agents such as oxybisbenzenesulfonyl hydrazide; nitroso compound foaming agents such as dinitropentamethylenetetramine;
Inorganic foaming agents such as baking soda (sodium bicarbonate) and the like can be mentioned. These foaming agents are used in order to achieve a preferable expansion ratio as described later, so that the resin 10 for the void-containing resin molded article can be obtained.
0.1 parts by mass or more, preferably 0.3 parts by mass with respect to 0 parts by mass.
It is preferably not less than 5 parts by mass, more preferably not more than 2 parts by mass.

The apparatus used for extrusion foam molding is not particularly limited, and a known single-screw extruder or twin-screw extruder can be used. As the molding conditions (resin temperature and the like), conditions that can achieve the following expansion ratio may be appropriately selected according to the resin used. For example, in order to achieve the following expansion ratio by using polystyrene as a resin and adding a blowing agent: baking soda in the above range to the resin, the resin temperature must be 100 to 200 ° C.
It should just be about.

The expansion ratio of the void-containing resin molded product is 1.1.
Times or more, preferably 1.5 times or more, and 5 times or less,
Preferably, it is recommended to be three times or less. With such a foaming ratio, it is possible to reduce the weight while securing the strength required for the building crosspiece.

[0025] The shape of the void-containing resin molded body is not particularly limited as long as it is rod-shaped. However, since the architectural crosspiece of the present invention is mainly used for tile crossbars and rims, it can be used as a base plate or pillar. A shape that can increase the contact area to some extent is preferable, and a rectangular cross section is recommended.

In the case where a void-containing resin molded article is obtained by extrusion foam molding, the molded article is cooled in as short a time as possible after extrusion, whereby foaming on the surface can be suppressed, and the building material having a smooth surface can be suppressed. Can be manufactured. The cooling method is not particularly limited,
A known method (for example, water cooling or the like) may be employed.

Next, a description will be given of a groove forming step which is a feature of the production of the building beam of the present invention. In order to form a groove in the resin foam molded article containing a void, a pressing method is adopted. Thereby, the groove is formed in the pressing portion, and the bubbles inside the molded body are crushed, and the resin in the groove forming portion and its surroundings are compressed to increase the density, so that it is possible to suppress a decrease in the strength of the groove bottom. .

When a groove is formed by cutting, the surface of the groove is easily scratched. When such a crosspiece is subjected to an impact, cracks grow from the scratch as a starting point. This causes a reduction in strength. However,
In the groove forming method employed in the present invention, since such a scratch is unlikely to occur, a reduction in strength is suppressed from this point as well.

Further, if the grooves are formed by the above method, it is easy to make the groove surface smooth unlike the surface formed by cutting, so that the architectural beam of the present invention obtained by this method is used. When used for roof tiles, water can flow well.

The above-mentioned pressing can be carried out, for example, using a groove forming die or a groove forming roller. It needs to be heated to a temperature that allows it. However, in the case where the above-mentioned extrusion foaming and the pressing of the groove forming portion are continuously performed, if the grooves are provided before the solidification of the void-containing resin molded body, the grooves and the rollers and the like are heated. It is not necessary. In this case, cooling for suppressing foaming of the surface portion is performed promptly after the groove is formed.

Although the number of grooves to be formed is not particularly limited,
Normally, a plurality are formed at predetermined intervals as shown in FIG. The shape of the groove is not particularly limited. In addition to making the cross section rectangular or square, for example, as shown in FIG. 2 (showing a cross section parallel to the length direction of the building crosspiece), for example, the cross section is substantially half It narrows in the groove bottom direction on the side wall surface of the groove, such as a circle (the left side in FIG. 2), a triangle (the center in FIG. 2), and a trapezoid (the length of the groove bottom side is shortened as shown in the right side in FIG. 2). It may be inclined.

The corners at the bottom of the groove when the cross section has a triangular groove, and the corners formed by the groove wall surface and the bottom at the time when the cross section has a rectangular, square, or trapezoidal groove, are the corners. In order to avoid concentration of stress on the portion, it is preferable that a curved surface is formed. In addition, it is recommended that the corner formed by the side wall surface of the groove and the portion where the groove is not formed be chamfered from the viewpoint of handleability of the architectural beam.

The groove having the above-mentioned shape can be provided by appropriately selecting the shape of a groove forming die or a roller to be used.

The size (groove width and depth) of the groove is not particularly limited, and may be a size necessary for water passage or ventilation as long as the strength of the molded body is not impaired. Is not less than 3 mm, preferably not less than 5 mm and 20 m
m or less, preferably 10 mm or less is recommended. The depth of the groove is usually 1 mm or more, preferably 2 mm or more, and 7.5 mm or less, preferably 4.
It is recommended to be 5 mm or less. In other words, the depth of the groove is 10% or more, preferably 15% or more, with respect to the thickness of the void-containing resin molded body before the groove is formed, and is 50% or more.
%, Preferably 35% or less.

In addition, a groove non-formed portion (between adjacent grooves)
In order to more reliably guide the water flowing into the groove, as shown in FIG. 3, from the corner of at least one end face of the groove to the corner of the non-groove-forming portion following the corner, It is recommended that an inclined surface directed toward the bottom of the groove be formed. The inclined surface can be formed in the same manner as the groove.

Regarding the size of the inclined surface, the position of point A in FIG. 3 may be closer to the groove forming the inclined surface than the center position between adjacent grooves. In FIG. 3, point B is a position at about 25 to 75% of the depth of the groove forming the inclined surface, and point C is
From the corner of the groove before the slope is formed, the width of the building
Generally, the position is set to about 0 to 50%. In addition, the inclined surface is a plane, and the water flowing to the non-groove portion is
As long as it can be guided to the groove, the surface may have a certain amount of undulation.

For example, when the architectural crosspiece of the present invention is fixed to a roof base plate, if a nail is driven into a groove forming portion, water may leak when water passes through the groove. However, at the time of fixing, usually, the groove forming surface is directed to the base plate side and nailed from the opposite surface of the surface, so there is a construction problem that it is difficult to distinguish the groove forming portion and the groove non-forming portion. .
Therefore, when the groove is provided on one surface, it is preferable that a mark for visually discriminating the groove forming portion and the groove non-forming portion be attached to any other surface. With this mark, even when the groove forming surface is fixed toward the base plate side, the groove forming portion and the groove non-forming portion can be easily visually recognized, and the above-described water leakage can be prevented.

The above-mentioned marks are not particularly limited as long as they can visually discriminate the groove-formed portion and the groove-non-formed portion. For example, as shown in FIG. 4, when a streak or the like is provided with a marker or the like having a color different from the color of the architectural crosspiece or a groove is provided, a method similar to the above-described method of providing the groove is used. Accordingly, an arbitrary pattern or the like may be attached to the extent that the crosspiece can be visually recognized without impairing the strength or the like of the building crosspiece. Also, as for the position to be marked, if it is possible to visually discriminate between the groove forming portion and the groove non-forming portion, even if it is a position corresponding to the groove forming portion on any of the above-mentioned surfaces, the groove non-forming portion is not marked. It may be a position corresponding to the forming portion.

Further, in the case where the groove is provided on one surface, as shown in FIG. 4, the surface opposite to the surface provided with the groove is provided in parallel with the longitudinal direction of the resin molding including the void. It is preferable that the uneven stripe is provided from the viewpoint of improving workability. That is, when a building bar having the above-mentioned uneven bar is used for a tile bar, the uneven bar serves as a non-slip when a person works, and when nailing such a building bar. In this case, the nail tip is housed in the concave portion and fixed, so that the nail is easily driven.

The shape of the uneven stripe is not particularly limited.
The cross section of the projection may be rectangular, trapezoidal, triangular, substantially semicircular, or the like. It is recommended that the pitch of the concavo-convex strip is 0.3 mm or more, preferably 1 mm or more, and 3 mm or less, preferably 2 mm or less. Further, the depth of the concave portion (that is, the depth from the highest position of the convex portion to the lowest position of the concave portion) is 0.3 mm or more, preferably 0.5 mm
It is more than 3 mm, preferably 2 mm or less. As a method of forming the uneven stripes, for example, the same method as the above-described groove formation can be adopted.

When the architectural crosspiece of the present invention is used for a tile crosspiece or a hull, as described above, it is usual to nail and fix it to a field board, a pillar or the like. It is also possible to use bolts and nuts or screws, or to fix using an adhesive or an adhesive. When using an adhesive or a pressure-sensitive adhesive, good adhesive strength and adhesive strength can be obtained from the resin used for the architectural crosspiece of the present invention and the material used for the field board, etc., from known ones. Can be selected as appropriate.

[0042]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments. However, the following examples do not limit the present invention, and all changes and implementations without departing from the spirit of the preceding and following descriptions are included in the technical scope of the present invention.

[Measurement of Density] To 100 parts by mass of polystyrene, 0.5 part by mass of a blowing agent: baking soda was added, extrusion foaming was performed, followed by pressing with a groove forming die to form a groove, and rapidly cooling with water. Thereafter, it was dried to obtain a building crosspiece of the present invention. The obtained crosspiece for building has an expansion ratio of 2.3 times and a width of:
It is a square bar having a thickness of 30 mm, a thickness of 15 mm, and a length of 300 mm, and has a groove provided in parallel with the width direction. The groove is
The cross section is approximately semicircular, the maximum groove width: 10 mm, and the depth:
3.5 mm.

With respect to the obtained crosspiece for building, the densities of the groove forming portion and other portions were measured. The measurement sample was prepared by the method described above, and water was used as the immersion liquid in accordance with the provisions of JIS K 7112, A method. Table 1 shows the results.

[0045]

[Table 1]

As is clear from Table 1, the density of the groove forming portion is higher than the density of the other portions. The ratio of the density of the groove forming portion to the density of the other portions was 1.04 when calculated using these average values.

[Strength measurement] Experiment 1 Blowing agent: 0.5% sodium bicarbonate per 100 parts by mass of polystyrene
A part by mass was added, extrusion foaming was performed, followed by pressing with a groove forming die to form a groove, rapidly cooling with water, and then drying to obtain a building beam 1. The obtained architectural crosspiece 1 is a square rod having a foaming ratio of 2.3 times, a width of 30 mm, a thickness of 15 mm, and a length of 300 mm, and has a groove provided in parallel with the width direction. The groove had a substantially semicircular cross section, a maximum groove width of 10 mm, and a depth of 3.5 mm.

As shown in FIG. 5, the architectural crosspiece 1 is fixed so that the center of the groove is located at a position 43 mm from the end of the fixture, and 157 mm from the center of the groove (20 mm from the fixed part).
0mm) at the push gauge (PS made by IMADA)
M-20), and the maximum load at the time of breaking of the architectural crosspiece 1 was measured. The measurement was performed at n = 5, and the average value was obtained. Table 2 shows the results.

Experiment 2 A blowing agent: baking soda 0.4 with respect to 100 parts by mass of polystyrene
5 parts by mass were added, and a building bar 2 having an expansion ratio of 1.9 was obtained by the same method as in Experiment 1. This building beam 2
For, the maximum load at the time of breaking was measured by the same method as in Experiment 1. Table 2 shows the results.

Experiment 3 Blowing agent: 0.5% sodium bicarbonate per 100 parts by mass of polystyrene
A mass part was added, and extrusion foaming, water cooling, and drying were performed to obtain a square rod-shaped void-containing resin molded product having a foaming ratio of 2.3 times, a width of 30 mm, a thickness of 15 mm, and a length of 300 mm. The cross section is rectangular due to the cutting process, groove width: 10m
m, depth: A 3.5 mm groove was provided to provide a crosspiece 3 for building. The maximum load at the time of destruction was measured for this building beam 3 by the same method as in Experiment 1. Table 2 shows the results.

[0051]

[Table 2]

The building beams 1 and 2 are examples satisfying the requirements of the present invention, and the maximum load at the time of destruction is large because the reduction in the strength of the groove forming portion is suppressed. On the other hand, the architectural bar 3 is a comparative example that does not satisfy the requirements of the present invention, and has a weak groove forming portion, and the maximum load at the time of breaking is inferior to the architectural bars 1 and 2.

[0053]

As described above, the present invention provides an architectural crosspiece having a structure in which the density of the groove forming portion is higher than that of the other portions and in which the strength of the groove forming portion is suppressed, and a method of manufacturing the same. Was completed. The crosspiece for building of the present invention has a smooth groove surface, and furthermore, by providing the above-described inclined surface from the corner of the groove end face, it is possible to efficiently pass water when used for a tile crosspiece. .

Also, the workability can be improved by providing a mark for visually distinguishing the groove-formed portion and the non-groove-formed portion, or by providing the above-mentioned uneven stripes.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a building beam of the present invention.

FIG. 2 is a cross-sectional view for explaining a shape of a groove formed in a building crosspiece of the present invention.

FIG. 3 is a schematic view of the architectural crosspiece of the present invention in which an inclined surface is formed from a corner of an end face of a groove to a corner of a non-groove portion following the corner, toward a bottom of the groove. is there.

FIG. 4 is a schematic diagram of a crosspiece for construction of the present invention provided with marks for visually distinguishing a groove forming portion and a non-groove forming portion, and an uneven strip.

FIG. 5 is an explanatory diagram of a method for measuring the strength of a building beam.

Continued on the front page (72) Inventor Nobuyuki Anma 33 characters 66, Sanhasya-cho, Fukui-shi, Fukui Inside Fukubi Chemical Industry Co., Ltd. (72) Inventor Satoshi Takeda 1-32-3 Oi, Shinagawa-ku, Tokyo Fukubi F term (reference) in the Tokyo Chemical Industry Co., Ltd. 2E001 DA02 DB02 DB05 FA09 FA16 GA63 GA73 HD11 HD14 HE01 KA05 LA01 LA04 LA12 NA07 NB01 NC01 ND12

Claims (6)

[Claims] Claims 1. An architectural crosspiece made of a void-containing resin molded article having at least one surface provided with a water-permeable or air-permeable groove for use as a base material for a building, wherein the density of the groove-forming portion is: An architectural crosspiece having a density higher than that of other parts. 2. The crosspiece for a building according to claim 1, wherein the resin molded body containing voids is a resin foam molded body. 3. An inclined surface toward a bottom portion of the groove is formed from a corner of at least one end face of the groove to a corner of a non-groove portion following the corner. Or the crosspiece for construction according to 2. 4. A groove according to claim 1, wherein a groove is provided on one surface, and a mark for visually distinguishing a groove forming portion and a groove non-forming portion is attached to any other surface. A crosspiece for construction according to any of the above. 5. A groove is provided on one surface, and a concavo-convex strip is provided on a surface opposite to the surface on which the groove is provided, in parallel with a longitudinal direction of the resin molding including the voids. Claim 1
4. The crosspiece for construction according to any one of 4. 6. The method for producing a building crosspiece according to claim 1, further comprising a step of forming a groove by pressing a rod-shaped void-containing resin molded body. A method for manufacturing building beams.