JP6979843B2 - Corner base material - Google Patents

Description

The present invention relates to a corner base material used as a base material for wallpaper in a protruding corner of a building.

When installing wallpaper inside a building such as a house, generally, the wallpaper is attached to the surface of a wall member such as gypsum board via an adhesive, but even if the wallpaper is attached in the same way at the corners, it will be clean. Often not finished. For example, when the end faces of gypsum boards are butted in a crossed manner to form a convex corner portion (hereinafter, this is referred to as a protruding corner portion), a relatively large gap or step is likely to occur in the butted portion between the gypsum boards. Even if the wallpaper is attached to the protruding corners formed by the gypsum board as described above, there is a problem that the wallpaper is liable to be wrinkled or distorted and the workability is poor.

Therefore, it has been proposed to attach a corner base material made of a material such as synthetic resin different from gypsum board to the protruding corners, and to attach wallpaper to the corner base material. For example, in Patent Document 1 below, a corner base material having an L-shaped cross section made of a resin molded body such as a foamed resin is attached to a protruding corner, and a wallpaper is attached to the surface of the corner base material via putty or an adhesive. It is disclosed to paste.

Japanese Unexamined Patent Publication No. 2003-176612

The above-mentioned Patent Document 1 further proposes to form a large number of ridges (ribs) partitioned by a large number of vertical grooves (recessed grooves) on the surface of the corner base material. According to this, it is expected that the bond strength of the putty or the adhesive to the surface of the corner base material and, by extension, the bond strength of the wallpaper will be increased.

Specifically, in Patent Document 1, as the ridges of the corner base material, ridges having a constant pattern defined by vertical grooves having the same depth are formed. However, according to the findings of the inventor of the present application, it is often the case that the bond strength of the wallpaper cannot be increased as expected only by forming such a fixed pattern of ridges. Therefore, further improvement in the surface shape of the corner base material has been required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a corner base material capable of sufficiently increasing the bonding strength of wallpaper to be attached to a protruding corner of a building. ..

To solve the above problems, the present invention is a corner base material used as a base material for a wallpaper in a protruding corner of a building, and is attached so as to cover the corners of the base material in the protruding corner. Each surface of the first wall portion and the second wall portion is provided with a first wall portion and a second wall portion intersecting with each other, and a plurality of basic ridges partitioned by a plurality of concave grooves arranged at intervals are provided on each surface of the first wall portion and the second wall portion. A plurality of fine ridges smaller than the basic ridges are formed on the surface of each of the basic ridges, and the basic ridges and the fine ridges extend in parallel with the extending direction of the base material, respectively. The fine ridges are formed in a triangular shape in a cross-sectional view, and have a first surface and a second surface that intersect at the apex of the triangle, and the second surface is compared with the first surface. A virtual plane that is located near the outer corner where the surfaces of the first wall and the second wall intersect and intersects the base ends of the first and second surfaces is referred to as a virtual bottom surface. When this is done, the first surface intersects the virtual bottom surface at a first angle, and the second surface intersects the virtual bottom surface at a second angle larger than the first angle. (Claim 1).

According to the present invention, since a plurality of concave grooves are formed in the first and second wall portions of the corner base material, a filler such as putty or an adhesive to be filled in the concave grooves (hereinafter, simply referred to as a filler). ) Exhibits a so-called anchor effect, and the bonding strength of the filler to the corner base material is generally enhanced. In addition, since fine ridges are formed on each surface of the plurality of basic ridges formed between the plurality of concave grooves, the wallpaper is tentatively attached to the corner base material via the filler. Even if some external force is applied to the wallpaper, the local deformation of the filler due to the external force is suppressed by the fine ridges. For example, if the fine ridges are omitted from the surface of the basic ridges (the surface of the basic ridges is a smooth surface), a thin layer applied between the surface of the basic ridges and the wallpaper. It is considered that the filler in the above is relatively easily deformed in the shear direction. Therefore, for example, when an external force is repeatedly applied to the wallpaper, the bond between the filler and the basic ridge may be released relatively easily, and the wallpaper may be peeled off. On the other hand, when a plurality of fine ridges are formed on the surface of the basic ridges as in the present invention, the filler enters the minute dents formed between the fine ridges, respectively. For example, even if the filler tries to be deformed in the shear direction by receiving an external force applied to the wallpaper, the deformation is prevented by the fine ridges. This enhances the bonding strength between the filler and the basic ridges, and in combination with the anchor effect of the concave groove between the basic ridges described above, effectively suppresses the wallpaper from peeling off from the corner base material. be able to.

In addition, each fine ridge is formed in a triangular shape in a cross-sectional view, and the intersection angle between the second surface and the virtual bottom surface (second angle) is larger than the intersection angle (first angle) between the first surface and the virtual bottom surface. Since the angle) is set to be larger, the triangle presented by each fine ridge is formed into an isosceles triangle, more specifically, an isosceles triangle deformed so as to fall toward the outer corner portion of the corner base material . As a result, even if the wallpaper is to be peeled off from the outer corner of the corner base material, which is most likely to be damaged due to deterioration over time, the peeling is sufficiently suppressed by the fine ridges, and the wallpaper is more stable. Can be combined with the corner base material.

In the above configuration, more preferably, the first angle is set to an acute angle of less than 90 degrees, and the second angle is set to an obtuse angle of more than 90 degrees ( claim 2 ).

According to this configuration, it is possible to more effectively suppress the peeling of the wallpaper in the above-mentioned direction, and it is possible to maintain the bonding strength of the wallpaper more stably.

In the present invention, preferably, the groove width on the side closer to the bottom surface of the concave groove (the concave groove formed between adjacent basic ridges) is wider than the groove width on the side far from the bottom surface. ( Claim 3 ).

According to this configuration, the anchor effect due to the concave groove between the basic ridges can be further enhanced, and the bonding strength of the filler to the corner base material can be sufficiently enhanced as a whole.

As described above, according to the corner base material of the present invention, the bonding strength of the wallpaper attached to the protruding corner of the building can be sufficiently increased.

It is sectional drawing which shows the protruding corner part of the building to which the corner base material which concerns on one Embodiment of this invention is applied. It is a partially disassembled perspective view of the above-mentioned protruding corner portion. It is a perspective view which shows the said corner base material by itself. It is sectional drawing which shows the said corner base material by itself. It is a partially enlarged view of FIG. It is a figure for demonstrating the procedure (the 1) of pasting the wallpaper on the corner base material. It is a figure for demonstrating the procedure (the 2) of pasting the wallpaper on the corner base material. It is a figure for demonstrating the action effect by the said corner base material. It is a figure for demonstrating the modification of the said Embodiment.

1 and 2 are a cross-sectional view and a perspective view showing a protruding corner X of a building to which the corner base material 1 according to the embodiment of the present invention is applied. The protruding corners X shown in FIGS. 1 and 2 are corners formed so as to be convex toward the interior space Z in the interior of a building such as a house, and the interiors intersect at an angle of approximately 90 degrees. It is formed by two wall members. A steel base material 30 (C-shaped steel in the figure) is arranged on the back side of the protruding corner X so as to extend in the vertical direction. The base material 30 is not limited to the one made of steel, and may be, for example, a wooden square lumber.

Assuming that the wall portions corresponding to the two sides of the square C-shaped cross section exhibited by the base material 30 facing the Z side of the interior space are the first base wall 31 and the second base wall 32, these first base wall 31 and A first wall member 41 made of, for example, a gypsum board and a second wall member 42 are fixed to the second base wall 32 via screws or the like (not shown). The first wall member 41 and the second wall member 42 are attached to a region excluding the corner portion C where the base walls 31 and 32 of the base material 30 intersect and their vicinity thereof, and the end surface 41a of the first wall member 41 is attached. And the end surface 42a of the second wall member 42 are separated from each other. The corner base material 1 is attached so as to fill a blank region having a substantially L-shaped cross section formed between the end faces 41a and 42a. As the corner base material 1, for example, a resin molded product made of a foamable vinyl chloride resin or the like is used.

Another base material (not shown) is arranged at a position away from the base material 30 on the right side of the paper surface in FIG. 1, and the first wall member 41 is attached so as to cover between these two base materials. ing. The first wall member 41 is fixed to the base material 30 by fastening one end thereof (a portion close to the corner base material 1) to the first base wall 31 of the base material 30 with a screw or the like (not shown). There is.

Another base material (not shown) is arranged at a position distant from the base material 30 on the lower side of the paper surface, and the second wall member 42 is attached so as to cover between the two base materials. Has been done. The second wall member 42 is fixed to the base material 30 by fastening one end thereof (a portion close to the corner base material 1) to the second base wall 32 of the base material 30 with a screw or the like (not shown). There is.

The corner base material 1 is formed in a substantially L-shaped cross section so as to fill a blank area between the end faces 41a and 42a of the first and second wall members 41 and 42, and is formed on the Z side of the indoor space of the base material 30. It is arranged so as to extend in the vertical direction along the corner portion C (ridge line) of. The corner base material 1 has a first wall portion 11 that abuts on the first base wall 31 of the base material 30, and a second wall portion 12 that abuts on the second base wall 32, and the first wall portion 11 Is fixed to the base material 30 by being fastened to the first base wall 31 with a screw 37.

By intersecting the surface of the first wall portion 11 and the surface of the second wall portion 12, an outer corner portion 15 forming a corner portion on the Z side of the interior space of the corner base material 1 is formed. The outer corner portion 15 forms a ridge line extending in the vertical direction at the protruding corner portion X of the building. The outer corner portion 15 is an R surface having a rounded small radius (see FIGS. 3 and 4 below).

At the inner corner portion of the corner base material 1, that is, the corner portion on the side opposite to the indoor space Z, a thinning recess 16 is formed so as to be recessed on the indoor space Z side.

At the end of the first wall 11 on the side close to the first wall member 41, a chamfered portion 17 is formed by removing a part of the end on the interior space Z side. Similarly, at the end portion of the second wall portion 12 on the side close to the second wall member 42, a chamfered portion 18 is formed by removing a part of the end portion on the interior space Z side.

The wallpaper 50 is attached to each surface (the surface on the interior space Z side) of the first and second wall members 41 and 42 and the corner base material 1 as described above via the putty 52 and the adhesive 51 described later. .. That is, the wallpaper 50 includes the surface of the first wall member 41, the surfaces of the first wall portion 11 and the second wall portion 12 (including the outer corner portion 15) of the corner base material 1, and the surface of the second wall member 42. It is pasted so as to continuously cover and. The wallpaper 50 may be a soft sheet-like body constituting the design surface, and the material and structure thereof are not particularly limited. For example, a soft sheet-like body made of various materials such as paper, resin, and cloth or a mixture thereof can be used as the wallpaper 50.

3 and 4 are a perspective view and a cross-sectional view showing the corner base material 1 as a single unit, and FIG. 5 is a partially enlarged view of FIG. As shown in FIGS. 3 to 5 and FIG. 1 above, the surfaces of the first wall portion 11 and the second wall portion 12 of the corner base material 1 are in the vertical direction (orthogonal to the paper surface in FIGS. 1 and 4). A plurality of basic ridges 21 extending in the direction (in other words, the extending direction of the base material 30) are formed. These basic ridges 21 are provided so as to be lined up in the lateral direction (direction orthogonal to the vertical direction) at a substantially constant pitch, and concave grooves 22 having a predetermined depth are formed between the basic ridges 21. Has been done. In other words, a plurality of concave grooves 22 are arranged side by side in the first wall portion 11 and the second wall portion 12 at intervals, so that the basic ridges 21 are partitioned between the adjacent concave grooves 22 respectively. ing. The plurality of basic ridges 21 and the plurality of concave grooves 22 extend in parallel with each other along the vertical direction and are formed so as to be arranged alternately in the horizontal direction.

Each of the plurality of concave grooves 22 has a substantially trapezoidal cross section, and is formed so that the groove width increases toward the bottom surface side. That is, in FIG. 5, if the groove width of the bottom surface portion of each concave groove 22 is A and the groove width of the open end portion farthest from the bottom surface is B, the relationship A> B is established. The depth D of each concave groove 22 is set to be, for example, about 2 to 10% of the thickness of the corner base material 1 (dimension T shown in FIG. 4).

On each surface of the plurality of basic ridges 21 in the first wall portion 11 and the second wall portion 12, a plurality of fine ridges 23 having a smaller protrusion amount than the basic ridge 21 are formed so as to extend in the vertical direction. There is. The amount of protrusion of the fine ridges 23 (distance from the virtual bottom surface S to the apex P, which will be described later) is set to be about 2 to 10% of the depth D of the concave groove.

As shown in FIG. 5, each fine ridge 23 is formed in a triangular shape in a cross-sectional view, and has a first surface 23a and a second surface 23b that intersect at the position of the apex P of the triangle. The second surface 23b is formed on the side closer to the outer corner portion 15 of the corner base material 1 than the first surface 23a.

When the virtual plane that intersects each base end of the first surface 23a and the second surface 23b is a virtual bottom surface S, the first surface 23a intersects the virtual bottom surface S at a first angle θ1, and the second surface 23b is virtual. It intersects the bottom surface S with a second angle θ2. Further, the first surface 23a and the second surface 23b intersect at an angle θ3. The first angle θ1 and the third angle θ3 are both set to acute angles smaller than 90 degrees. On the other hand, the second angle θ2 is set to an angle larger than the other angles θ1 and θ3, and particularly in the present embodiment, it is set to an obtuse angle larger than 90 degrees.

As a result of the angle setting as described above, the triangle presented by each of the fine ridges 23 becomes an isosceles triangle deformed so as to fall toward the outer corner portion 15 of the corner base material 1. More specifically, assuming that the virtual plane orthogonal to the virtual bottom surface S and bisecting the virtual bottom surface S is the reference plane Q, the triangle presented by the fine ridge 23 has its apex P at an outer angle portion 15 rather than the reference plane Q. It is formed so as to be greatly offset to the side.

Next, the procedure for attaching the wallpaper 50 to the corner base material 1 as described above will be described. As a preparatory step before attaching the wallpaper 50, it is assumed that the corner base material 1 is already fixed to the base material 30 via a screw 37.

To attach the wallpaper 50, first, as shown in FIG. 6, the putty 52 is applied to the surfaces of the first wall portion 11 and the second wall portion 12 of the corner base material 1. Specifically, between the plurality of concave grooves 22 formed on the surfaces of the first and second wall portions 11 and 12 and the plurality of fine ridges 23 formed on the surface of each basic ridge 21 (adjacent fine ridges 23). The concave groove formed between the ridges 23), the concave groove corresponding to the chamfered portion 17 formed between the first wall portion 11 and the first wall member 41, and the second wall portion 12 and the second. Putty evenly on the surfaces of the first and second wall portions 11 and 12 so that the putty 52 is filled without gaps in the concave groove corresponding to the chamfered portion 18 formed between the wall member 42. 52 is applied. As the putty 52, a putty that can be well bonded to both the corner base material 1 and the adhesive 51 described later is selected. For example, a paste-like resin base material mixed with gypsum powder is preferable. be.

Next, as shown in FIGS. 2 and 7, the wallpaper 50 having the adhesive 51 coated on the back surface is attached to the corner base material 1. Specifically, the wallpaper 50 continuously covers the surface of the first wall member 41, the surfaces of the first and second wall portions 11 and 12 of the corner base material 1, and the surface of the second wall member 42. It is pasted like this. As the adhesive 51, one that can be well bonded to both the first and second wall members 41 and 42 and the wallpaper 50 is selected. For example, when the first and second wall members 41 and 42 are gypsum boards. For example, a starch-based adhesive is suitable as the adhesive 51. On the other hand, since the corner base material 1 is made of synthetic resin, the compatibility with the adhesive 51 selected on the premise of a material such as gypsum board is not inherently high. However, in this embodiment, the surface of the corner base material 1 is covered with the putty 52, and the material of the putty 52 is selected so as to secure a high bondability between the putty 52 and the adhesive 51. Therefore, the wallpaper 50 is adhered to the corner base material 1 with sufficient strength via the adhesive 51 and the putty 52.

As described above, in the present embodiment, the corner base material 1 is attached to the base material 30 located on the back side of the projected corner portion X, and the wallpaper 50 is attached to the corner base material 1 via the putty 52 and the adhesive 51. It will be pasted. The corner base material 1 has a first wall portion 11 and a second wall portion 12 that are attached to the two base walls 31 and 32 that sandwich the corner portion C of the base material 30, respectively. A plurality of basic ridges 21 partitioned by a plurality of concave grooves 22 arranged at intervals are formed on the surfaces of the first wall portion 11 and the second wall portion 12, and the surface of each basic ridge 21 is formed. , A plurality of fine ridges 23 smaller than the basic ridge 21 are formed. According to such a configuration, there is an advantage that the bonding strength between the wallpaper 50 and the corner base material 1 is sufficiently increased.

That is, in the above embodiment, since a plurality of concave grooves 22 are formed in the first and second wall portions 11 and 12 of the corner base material 1, the putty 52 filled in the concave grooves 22 exerts a so-called anchor effect. However, the bonding strength of the putty 52 to the corner base material 1 is generally increased. In addition, since the fine ridges 23 are formed on each surface of the plurality of basic ridges 21 formed between the plurality of concave grooves 22, the wallpaper 50 is a corner base via the putty 52 (and the adhesive 51). Even if some external force is applied to the wallpaper 50 in the state of being attached to the material 1, the local deformation of the putty 52 due to the external force is suppressed by the fine ridges 23. For example, if the fine ridge 23 is omitted from the surface of the basic ridge 21 (when the surface of the basic ridge 21 is a smooth surface), between the surface of the basic ridge 21 and the wallpaper 50. It is considered that the applied thin layer putty is relatively easily deformed in the shear direction. Therefore, for example, when an external force is repeatedly applied to the wallpaper 50, the bond between the putty and the basic ridge 21 may be released relatively easily, and the wallpaper 50 may be peeled off. On the other hand, when a plurality of fine ridges 23 are formed on the surface of the basic ridges 21 as in the above embodiment, the putty 52 is formed in the minute grooves formed between the fine ridges 23, respectively. For example, even if the putty 52 tries to deform in the shearing direction by receiving an external force applied to the wallpaper 50, the deformation is prevented by the fine ridges 23. As a result, the bonding strength between the putty 52 and the basic ridge 21 is increased, so that the wallpaper 50 is peeled off from the corner base material 1 in combination with the anchor effect of the concave groove 22 between the basic ridges 21 described above. Can be effectively suppressed.

Further, in the above embodiment, each fine ridge 23 is formed in a triangular shape in a cross-sectional view, and the second surface 23b is formed rather than the intersection angle (first angle) θ1 between the first surface 23a and the virtual bottom surface S. The intersection angle (second angle) θ2 between the virtual bottom surface S and the virtual bottom surface S is set to be larger. In other words, the triangle presented by each fine ridge 23 has its apex P on the outer angle portion 15 side of the corner base material 1 with respect to the reference surface Q (the surface orthogonal to the virtual bottom surface S and bisecting the virtual bottom surface S). It is formed in a shape that is offset, so to speak, an unequal-sided triangle that is deformed so as to fall toward the outer angle portion 15. According to such a configuration, there is an advantage that the wallpaper 50 can be more stably bonded to the corner base material 1.

That is, when each fine ridge 23 is formed in the shape of an unequal side triangle as described above, the putty filled between the fine ridges 23 is particularly difficult to be deformed in the shear direction shown by the arrow D1 in FIG. Become. Therefore, even if the wallpaper 50 tries to peel off in the direction shown by the arrow D2 in FIG. 8, starting from the outer corner portion 15 where the wallpaper 50 is most likely to be damaged due to aged deterioration or the like, the peeling is caused between the fine ridges 23. It can be effectively suppressed by the putty 52, and the bond strength of the wallpaper 50 can be stably maintained.

In particular, in the above embodiment, since the first angle θ1 is set to an acute angle of less than 90 degrees and the second angle θ2 is set to an obtuse angle larger than 90 degrees, the putty 52 is set in the shearing direction indicated by the arrow D1. Deformation can be suppressed more effectively, and the bond strength of the wallpaper 50 can be maintained more stably.

Further, in the above embodiment, the concave groove 22 formed between the adjacent basic ridges 21 is formed so as to be wider toward the bottom surface side thereof (so that A> B in FIG. 5). The anchor effect of the concave groove 22 can be further enhanced, and the bonding strength of the putty 52 to the corner base material 1 can be sufficiently enhanced as a whole.

In the above embodiment, the putty 52 is applied to the front surface of the corner base material 1 and the adhesive 51 is applied to the back surface of the wallpaper 50, whereby the wallpaper 50 and the corner base material are applied through the adhesive 51 and the putty 52. However, if sufficient bonding strength can be obtained with only one layer of filler made of putty or adhesive, for example, the wallpaper 50 is attached using only that one layer of filler. You may.

Further, in the above embodiment, the fine ridges 23 on the surface of the basic ridges 21 are formed in a triangular shape in a cross-sectional view, but the cross-sectional shape of the fine ridges 23 can be variously changed. For example, as in the corner base material 1'shown in FIG. 9, fine ridges 23' having rounded vertices of a triangle may be formed. Alternatively, a fine ridge having a cross-sectional shape different from that of a triangle (for example, a trapezoidal shape) may be formed.

1 Corner base material 11 1st wall part 12 2nd wall part 15 outer corner part 21 basic ridge 22 concave groove 23 fine ridge 23a 1st surface 23b 2nd surface 30 base material 50 wallpaper C (base material) corner part P Vertex S Virtual base X Outer corner θ1 First angle θ2 Second angle

Claims (3)

A corner base material used as a base material for wallpaper in the protruding corners of buildings.
It comprises a first wall portion and a second wall portion intersecting each other, which are attached so as to cover the corner portions of the base material of the protruding corner portion.
On each surface of the first wall portion and the second wall portion, a plurality of basic ridges partitioned by a plurality of concave grooves arranged at intervals are formed.
On the surface of each of the basic ridges, a plurality of fine ridges smaller than the basic ridges are formed .
The basic ridges and the fine ridges are formed so as to extend parallel to the extending direction of the base material, respectively.
The fine ridges are formed in a triangular shape in cross-sectional view and have first and second surfaces that intersect at the vertices of the triangle.
The second surface is located closer to the outer angle portion where the surfaces of the first wall portion and the second wall portion intersect with each other, as compared with the first surface.
When a virtual plane that intersects each base end of the first surface and the second surface is used as a virtual bottom surface, the first surface intersects the virtual bottom surface at a first angle, and the second surface has the first angle. A corner base material characterized in that it intersects the virtual bottom surface with a second angle larger than that. In the corner base material according to claim 1,
A corner base material characterized in that the first angle is set to an acute angle of less than 90 degrees and the second angle is set to an obtuse angle larger than 90 degrees. In the corner base material according to claim 1 or 2,
The corner base material is characterized in that the concave groove is formed so that the groove width on the side closer to the bottom surface is wider than the groove width on the side far from the bottom surface.

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