JP7053012B2 - Base material for wall corners - Google Patents

Description

The present invention relates to a base material for wall corners to be joined to a wall corner portion constituting the outside corner portion or the inside corner portion of a building.

Traditionally, the wall corners have an L-shaped cross section to cover the unevenness of the wall corners when wallpaper (also called "cross material") is applied to the walls of general residential buildings. The base material for wall corners (hereinafter, may be abbreviated as "base material") is joined. Such a base material is made of a synthetic resin, is used for both the outside corner portion and the inside corner portion, and is joined to the wall corner portion by a putty material. The base material is joined from the floor to the ceiling, and the length of one is, for example, 2500 mm to 4000 mm.

Such a base material is realized by an extruded product of synthetic resin, and the surface facing the room in a state of being joined to the wall corner portion is subjected to uneven processing, which is also called knurling, in order to suppress the floating of the putty material. , A rough surface portion in which a plurality of irregularities extend along the longitudinal direction of the base material is formed (see, for example, Patent Documents 1 to 3).

Japanese Unexamined Patent Publication No. 2016-160654 Japanese Unexamined Patent Publication No. 2017-206874 Japanese Unexamined Patent Publication No. 2016-2572

FIG. 14 is a diagram showing an enlarged photograph of a part of the base material 100 for wall corners of the prior art. In the prior art described in the above-mentioned Patent Documents 1 to 3, a rough surface portion is formed on the base material 100. Therefore, when the putty material is applied to the base material 100 attached to the wall corner portion with a trowel or a spatula, the rough surface portion is formed. The putty material is not uniformly filled in each through hole 101 due to the unevenness constituting the surface portion, and as shown by reference numeral F in FIG. 14, a step F is provided on the surface of the putty material filled in each through hole 101. Will occur. Such a step F is due to the fact that after the putty material is applied, the moisture contained in the putty material is absorbed or evaporated by the base material, and the volume of the putty material is reduced, and is also referred to as "yase". .. If the wallpaper is pasted with the step F of the putty material, the wallpaper does not adhere to the part where the step F is generated, so that the adhesiveness of the wallpaper is reduced and the step F is projected onto the wallpaper after finishing. There is a problem that the aesthetics of the wallpaper are also deteriorated. Further, in order to apply the putty material so that such a step F does not occur, it takes a lot of labor and labor such as increasing the number of operations of the application tools such as a trowel and a spatula, and the putty material application work. There arises a problem that the workability of the spatula is lowered.

An object of the present invention is to improve the workability of the putty material coating work, to obtain a flat coated surface by uniformly applying the putty material, and to improve the adhesiveness and aesthetics of the wallpaper. It is to provide a base material for corners.

The present invention consists of a pair of strips, each of which is made of synthetic resin and has one side extending in parallel adjacent to each other.
It is made of synthetic resin and includes a connecting portion that connects each one side portion.
Each band-shaped portion is
The first ridge extending in the longitudinal direction of the strip,
It has a first ridge and a second ridge extending parallel to the first ridge at intervals in the width direction perpendicular to the longitudinal direction.
A plurality of through holes are provided between the first ridge and the second ridge at intervals in the longitudinal direction .
The first ridge and the second ridge have a protrusion height from one surface of the strip-shaped portion of 0.05 to 0.2 mm, and the first ridge and the second ridge have a longitudinal direction. It is a base material for wall corners characterized by having a triangular cross-sectional shape perpendicular to .

Further, in the present invention, the protrusion height from one surface of the strip-shaped portion is 0.05 to 0.2 mm between the through holes adjacent to the longitudinal direction, and the cross-sectional shape perpendicular to the longitudinal direction is formed. It is characterized in that a third ridge extending in the longitudinal direction is provided , which is a triangle .

Further , the apex angle θ of the first and second ridges of the present invention is 30 ° ≦ θ ≦ 120 ° .

According to the present invention, each side portion of the pair of strips is connected by a connecting portion. Each strip has a first ridge and a second ridge having a protrusion height from one surface of the strip having a height of 0.05 to 0.2 mm and a triangular cross-sectional shape, and the first ridge. A plurality of through holes are provided between the ridge and the second ridge. Since each band-shaped portion is configured in this way, when the base material for wall corners is attached to the base material for wall corners, when the operator applies the putty material to the base material for wall corners with a coating tool such as a trowel or a spatula, the work is performed. When the putty material moves to one or the other in the width direction by the operation of the coating tool of the person, a part of the putty material is blocked by the first or second ridges on the downstream side in the moving direction of the putty material. , A flow in the direction opposite to the moving direction is generated and guided into the through hole.

Due to the flow in the direction opposite to the moving direction of the putty material, the putty material flows into the voids in the through holes that are not filled only by the flow in the moving direction of the putty material due to the operation of the coating tool, and the putty is putty. The number of operations of the coating tool at the time of coating the material is reduced, and it is possible to prevent a step from being generated in each through hole after the putty material is cured. As a result, a uniform and flat coated surface of the putty material can be obtained on the base material for the wall corner, and the adhesiveness and aesthetics of the wallpaper can be improved.

Further, according to the present invention, the protrusion height from one surface of the strip-shaped portion is 0.05 to 0.2 mm between the through holes adjacent to each strip-shaped portion in the longitudinal direction, and the cross-sectional shape is triangular. Since a certain third ridge is provided, when the base material for wall corners is attached to the wall corner portion, when the operator applies the putty material to the base material for wall corners with a coating tool such as a trowel or a spatula, the moving direction is obtained. A part of the moving putty material is blocked by the third ridge, and the blocked putty material changes the flow along the width direction into a flow along the longitudinal direction and is guided into the through hole. In this way, the putty material can be sufficiently flowed into each through hole, so that a uniform and flat coated surface of the putty material can be obtained after the putty material is cured, and the adhesiveness and aesthetics of the wallpaper can be improved. It can be further improved.

Further, according to the present invention, since the cross-sectional shape perpendicular to the longitudinal direction of the ridges is triangular, the amount of exposure of the first ridges and the second ridges from the coated surface of the applied putty material is small, whereby the amount of exposure of the first ridges and the second ridges is small. The adhesiveness and aesthetics of the wallpaper can be further improved.

It is an enlarged sectional view which shows a part of the base material 1 for a wall corner of one Embodiment of this invention. It is an enlarged front view of a part of the base material 1 for a wall corner. It is sectional drawing of the base material 1 for a wall corner. It is a front view of a part of the base material 1 for a wall corner. It is a horizontal sectional view which shows the state which the base material 1 for a wall corner is attached to the wall corner portion W1 of a protruding corner. It is a horizontal sectional view which shows the state which the base material 1 for a wall corner is attached to the wall corner portion W1 of the inside corner. It is sectional drawing which shows the base material 1a for a wall corner of another embodiment of this invention. It is an enlarged sectional view of a part of the base material 1b for a wall corner of still another embodiment of this invention. It is a front view of a part of the base material 1b for a wall corner. It is an enlarged front view which shows a part of the base material 1c for a wall corner of still another embodiment of this invention. It is an enlarged front view which shows a part of the base material 1d for a wall corner of still another embodiment of this invention. It is an enlarged front view which shows a part of the base material 1e for a wall corner of still another embodiment of this invention. It is an enlarged front view which shows a part of the base material 1f for a wall corner of still another embodiment of this invention. It is a figure which shows the enlarged photograph of a part of the base material 100 for a wall corner of the prior art.

FIG. 1 is an enlarged cross-sectional view showing a part of the base material 1 for a wall corner according to an embodiment of the present invention, FIG. 2 is an enlarged front view of a part of the base material 1 for a wall corner, and FIG. 3 is a wall. It is sectional drawing of the base material 1 for a corner, and FIG. 4 is a front view of a part of the base material 1 for a wall corner. FIG. 5 is a horizontal cross-sectional view showing a state in which the base material 1 for wall corners is attached to the wall corner portion W1 at the outside corner, and FIG. 6 is a horizontal sectional view showing a state in which the base material 1 for wall corners is attached to the wall corner portion W1 at the inside corner. It is a horizontal cross-sectional view which shows the state. Note that FIG. 1 shows the base material 1 for wall corners divided by the matching line m1.

The base material for wall corners (hereinafter, abbreviated as “base material”) 1 of the present embodiment is formed by using an adhesive on the wall corner portion W1 forming the protruding corner of the wall W of the building in the vertical direction perpendicular to the paper surface in FIG. It is pasted and joined from the floor to the ceiling. After that, the wallpaper is attached to the wall W so as to cover the base material 1 of the wall corner portion W1. Here, the wall corner portion W1 refers to a substantially vertical straight intersection line W4 where two wall surfaces W2 and W3 intersect and a region in the vicinity thereof. Such a base material 1 can be used by inverting the inside and outside of the corner portion W1a shown in FIG. 6 which constitutes the inside corner of the wall W, similarly to the wall corner portion W1 forming the outside corner. The wall W is realized by, for example, gypsum board.

The base material 1 includes a pair of strip-shaped portions 2a and 2b each of which is made of synthetic resin and whose one side portions are adjacent to each other and extends in parallel, and a connecting portion 3 which is made of synthetic resin and connects each one side portion. .. Since the strip-shaped portions 2a and 2b are symmetrically configured with respect to the central axis L1 passing through the connecting portion 3 in the present embodiment, the configuration of one strip-shaped portion 2a will be described, and the description of the other strip-shaped portion 2b will be omitted. .. In another embodiment, the strips 2a and 2b are not symmetrical with respect to the connecting portion 3, for example, the width of one strip 2a (or 2b) is larger than the width of the other strip 2b (or 2a). May be a large base material.

In the present embodiment, one band-shaped portion 2a has a ridge portion 6a1 formed by a first ridge extending in the longitudinal direction of the strip-shaped portion 2a, and a space between the ridge portion 6a1 and the ridge portion 6a1 in the width direction perpendicular to the longitudinal direction. It has a ridge portion 6a2 formed by a second ridge that is opened and extends in the longitudinal direction. A plurality of through holes 4a are formed between the ridge portions 6a1 and 6a2. In this embodiment, three rows of through holes 4a are formed. The other strip-shaped portion 2b is also configured in the same manner as the one strip-shaped portion 2a, and three rows of through holes 4b are formed.

For convenience of explanation, the two rows of ridges formed on both sides of the one through-hole row of interest among the three rows of through-hole rows composed of the plurality of through-holes 4a and 4b are referred to as reference numerals. Notated as 6a1,6a2 or 6b1,6b2. In the present embodiment, the through holes 4a and 4b have an inner diameter D of D = 4 mm, and are formed with an interval ΔL1 in the longitudinal direction and an interval ΔL2 in the width direction. The longitudinal spacing ΔL1 is, for example, 8 mm, and the widthwise spacing ΔL2 is, for example, 12 mm.

The connecting portion 3 has a width L10 = 1.0 mm and has the same thickness T1 as the strip-shaped portions 2a and 2b. This thickness T1 is, for example, 0.4 mm. The connecting portion 3 has a thin film portion 3a integrally formed by biting into one surface of each band-shaped portion 2a, 2b by a thickness T2. The width L11 of the thin film portion 3a is, for example, 5.0 mm, and the thickness T2 is, for example, 0.05 mm. When the strip-shaped portions 2a and 2b are bent in a mountain fold so that the connecting portions 3 are convex outward by such a thin film portion 3a, the tensile stress generated in the connecting portion 3 is applied to the strip-shaped portions 2a and 2b. The stress concentration in the connecting portion 3 is relaxed, and the connecting force between the strip-shaped portions 2a and 2b is enhanced.

Each of the ridges 6a1, 6a2; 6b1, 6b2 forming each row is composed of two parallel and adjacent ridges. In addition, the putty material contains various particles from coarse to fine. When the putty is moved in the same direction by operating the moving direction B of the coating tool such as a trowel and a spatula, even if the particles of the putty material get over the first ridge, they can be caught by the second ridge. As a result, a flow B1 in which the moving direction B of the putty material is reversed is generated and efficiently flows into the through holes 4a and 4b, and as shown by the virtual line C, the putty material is uniformly and flatly formed in each ridge portion. It can be filled between 6a1,6a2; 6b1,6b2.

In the present embodiment, each of the ridges 6a1, 6a2; 6b1, 6b2 forming each row is composed of two ridges, but in another embodiment of the present invention, the putty material is applied by a coating tool. If the putty material sometimes applied in the moving direction B has a height H and a width L12 so as not to get over the ridge, it may be composed of only one. Further, when the putty material to be applied in the moving direction B when the putty material is applied by the application tool cannot obtain a height H and a width L12 sufficient to not overcome the ridges, the putty material is composed of three ridges. May be done. The number of such ridges is appropriately selected according to the type of putty material, the size of the base material 1, and the like.

As an example, when the cross-sectional shape of each of the ridges 6a1, 6a2; 6b1, 6b2 perpendicular to the longitudinal direction is triangular, the height H is H = 0.05 to 0.2 mm. , Preferably 0.1 mm. The width L12 is L12 = 0.1 to 0.8 mm. In the present embodiment, the height H of each ridge is H = 0.125 mm, and the width L12 is L12 = 0.5 mm. In this case, the apex angle θ of each ridge is θ = 120 °. In the embodiment of the present invention, the apex angle is an angle formed by two sides sandwiching the apex of the triangle, and the apex including the apex of each ridge may form an arc-shaped cross section by chamfering R.

When the cross-sectional shape of each ridge is triangular, the apex angle θ is not limited to 120 °, the apex angle θ may be less than 120 °, and an angle range of 30 ° ≤ θ ≤ 120 ° is possible. Is. If the apex angle θ is less than 30 °, the ridge becomes insufficient in strength, and the ridge is deformed or chipped by the pressing force of the putty material by the coating tool such as a trowel or a spatula. Further, when the apex angle θ exceeds 120 °, when the putty material is applied in the moving direction B by the coating tool, the putty material cannot be blocked by the ridge on the downstream side, and the putty material has ridges. Most of the putty material moving in the moving direction B passes over the ridges, and the putty material cannot be sufficiently supplied to the through holes 4a and 4b. Therefore, the apex angle θ of each ridge is preferably 30 ° or more and 120 ° or less.

The putty material is used to repair and smooth the unevenness and steps of the base material. In wall covering construction, putty treatment is performed to repair unevenness and steps in the base seams such as gypsum board, and to smooth the concave parts of the screw head. The main component of the putty material for wall covering construction is gypsum, synthetic resin, inorganic filler, or the like, and gypsum-based putty material that requires a curing time is often used. The undercoat putty material and the topcoat putty material are putty that cures in a certain period of time after kneading the powder putty with water and then hydrating the putty and water. There are two types: a type powder putty, which is mainly a gypsum-based putty, and a dry type powder putty material, which is a mixture of a powder synthetic resin and kneads the powder putty material with water, and then develops strength as it dries. The dry-type kneaded putty material is a paste-type putty material containing a synthetic resin emulsion, and develops strength as it dries.

As the synthetic resin used as the material for forming the strip-shaped portions 2a and 2b, for example, hard polyvinyl chloride is used. A plurality of through holes 4a and 4b are formed by pressing a substrate obtained by extruding hard polyvinyl chloride with an extrusion molding machine. In another embodiment of the present invention, ABS resin, polystyrene (abbreviated as PS), polyethylene terephthalate (abbreviated as PET) and the like may be used instead of rigid polyvinyl chloride.

As the material of the connecting portion 3, for example, a polyvinyl chloride-based elastomer, which is a thermoplastic resin that is more flexible, tougher, and plastically deformable than the strip-shaped portions 2a and 2b, can be used.

As described above, in the present embodiment, in the base material 1, one side portion of each of the strip-shaped portions 2a and 2b is connected by the connecting portion 3. In one band-shaped portion 2a, a plurality of through holes 4a are formed between the protrusion portions 6a1 and 6a2. In the other strip-shaped portion 2b, a plurality of through holes 4b are formed between the ridge portions 6b1 and 6b2.

For convenience of explanation, if the moving direction of the putty material due to the application work of the putty material is assumed to be one direction and indicated by reference numeral B, when the worker applies the putty material with an application tool such as a trowel or a spatula, the putty is used. One of the ridges 6a1, 6b1 on the downstream side of the moving direction B due to the material coating work causes a flow B1 in which some putty materials are reversed in the direction opposite to the moving direction B, and the inside of the through holes 4a, 4b. Can lead to each. Due to the flow in the direction B1 opposite to the movement direction B of the putty material, the putty material flows into the voids created by the flow of the putty material in the movement direction B alone, and the putty material is hardened. It is possible to prevent a step from being generated in each through hole later. As a result, the putty material can be applied uniformly and evenly, and the adhesiveness and aesthetics of the wallpaper can be improved.

Further, since the cross-sectional shape perpendicular to the longitudinal direction of each of the ridges constituting each of the ridges 6a1, 6a2, ...; 6b1, 6b2, ... Is a triangle, the ridges from the surface of the applied putty material. It is possible to reduce the exposure amount of each of the protrusions of 6a1, 6a2, ...; 6b1, 6b2, ...

FIG. 7 is a cross-sectional view showing a base material 1a for a wall corner according to another embodiment of the present invention. The same reference numerals are given to the parts corresponding to the above-described embodiments. The base material 1a of the present embodiment has a substantially L-shaped cross section perpendicular to the longitudinal direction thereof. In such a base material 1a as well, as in the base material 1 of the above-described embodiment, one side portion of each of the pair of strip-shaped portions 2a and 2b is connected by the connecting portion 3, and a plurality of strip-shaped portions 2a and 2b are connected to each other. Through holes 4a and 4b are formed, and ridges 6a and 6b are provided on both sides of each of the through holes 4a and 4b rows.

As a result, a plurality of through holes 4a and 4b are arranged between the ridges 6a and 6b of the strips 2a and 2b and the ridges 6a and 6b, and the operator can use a trowel or a spatula. When the putty material is applied to the base material 1 by the coating tool, a part of the putty material is opposite to the moving direction B due to the one ridge portion 6a1 on the downstream side of the moving direction B due to the application work of the putty material. A directionally inverted flow B1 can be generated and guided into the through holes 4a, 4b. Due to the flow B1 in the direction opposite to the movement direction B of the putty material, the putty material flows into the voids created by the flow of the putty material in the movement direction B alone, and the putty material is hardened. It is possible to prevent a step from being generated later in each of the through holes 4a and 4b. As a result, the putty material can be applied uniformly and evenly, and the adhesiveness and aesthetics of the wallpaper can be improved.

FIG. 8 is an enlarged cross-sectional view of a part of the base material 1b for a wall corner according to still another embodiment of the present invention, and FIG. 9 is a front view of a part of the base material 1b for a wall corner. Since the strip-shaped portions 2a and 2b are symmetrically configured with respect to the connecting portion 3, the other strip-shaped portion 2b is omitted, and the same reference numerals are given to the portions corresponding to the above-described embodiments. In the base material 1b of the present embodiment, the strip-shaped portions 2a and 2b have a plurality of third protrusions extending in the longitudinal direction between the through holes 4a and 4b adjacent to each other in the longitudinal direction in addition to the protrusions 6a and 6b. It has ridges 8a and 8b, which are ridges. In FIGS. 8 and 9, only one ridge portion 8a is shown. These ridges 6a and 6b and the ridges 8a and 8b each have a triangular cross-sectional shape perpendicular to the longitudinal direction.

Since the ridges 8a and 8b are provided between the through holes 4a and 4b adjacent to each other in the longitudinal direction in the strips 2a and 2b, they are repelled by the ridges 6a and 6b on the downstream side in the moving direction B. In addition to the flow B1, the moving direction B of a part of the putty material is changed by the ridges 8a and 8b, and the putty material is transparent even by the part of the flow B2 in which the flow of the moving direction B is changed in the middle. It is guided to the holes 4a and 4b, and the putty material is surely filled in the through holes 4a and 4b. As a result, it is possible to prevent the putty material in each of the through holes 4a and 4b from having a step, and the putty material is uniformly and evenly applied, so that the adhesiveness and aesthetic appearance of the wallpaper can be further improved.

FIG. 10 is an enlarged front view showing a part of the base material 1c for a wall corner according to still another embodiment of the present invention. Since the strip-shaped portions 2a and 2b are symmetrically configured with respect to the connecting portion 3, the other strip-shaped portion 2b is omitted, and the same reference numerals are given to the portions corresponding to the above-described embodiments. The base material 1c of the present embodiment is an ellipse in which the through holes 4a and 4b are long in the longitudinal direction in the front view. Even in such a configuration, as in the above-described embodiment, the flow B1 in the direction opposite to the moving direction B of the putty material causes the putty material to flow only in the moving direction B of the putty material in the through holes 4a and 4b. The putty material also flows into the voids generated without filling, and it is prevented that a step is generated in each of the through holes 4a and 4b after the putty material is cured, and the putty material is uniformly and evenly applied to the wallpaper. Adhesiveness and aesthetics can be improved.

FIG. 11 is an enlarged front view showing a part of the base material 1D for a wall corner according to still another embodiment of the present invention. Since the strip-shaped portions 2a and 2b are symmetrically configured with respect to the connecting portion 3, the other strip-shaped portion 2b is omitted, and the same reference numerals are given to the portions corresponding to the above-described embodiments. In the base material 1c of the present embodiment, the through holes 4a and 4b have a cross shape in front view. Even in such a configuration, as in the above-described embodiment, the flow B1 in the direction opposite to the moving direction B of the putty material causes the putty material to flow only in the moving direction B of the putty material in the through holes 4a and 4b. The putty material also flows into the voids generated without filling, and it is prevented that a step is generated in each of the through holes 4a and 4b after the putty material is cured, and the putty material is uniformly and evenly applied to the wallpaper. Adhesiveness and aesthetics can be improved.

FIG. 12 is an enlarged cross-sectional view showing a base material 1E for a wall corner according to still another embodiment of the present invention. Since the strip-shaped portions 2a and 2b are symmetrically configured with respect to the connecting portion 3, the other strip-shaped portion 2b is omitted, and the same reference numerals are given to the portions corresponding to the above-described embodiments. The base material 1c of the present embodiment is an elongated hole in which the through holes 4a and 4b are convexly curved to one side in the width direction (left-right direction in FIG. 12) in the front view. Even in such a configuration, as in the above-described embodiment, the flow B1 in the direction opposite to the moving direction B of the putty material causes the putty material to flow only in the moving direction B of the putty material in the through holes 4a and 4b. The putty material also flows into the voids generated without filling, and it is prevented that a step is generated in each of the through holes 4a and 4b after the putty material is cured, and the putty material is uniformly and evenly applied to the wallpaper. Adhesiveness and aesthetics can be improved.

FIG. 13 is an enlarged front view showing a base material 1f for a wall corner according to still another embodiment of the present invention. Since the strip-shaped portions 2a and 2b are symmetrically configured with respect to the connecting portion 3, the other strip-shaped portion 2b is omitted, and the same reference numerals are given to the portions corresponding to the above-described embodiments. In the base material 1f of the present embodiment, the through holes 4a and 4b are rectangular in front view. Even in such a configuration, as in the above-described embodiment, the flow B1 in the direction opposite to the moving direction B of the putty material causes the putty material to flow only in the moving direction B of the putty material in the through holes 4a and 4b. The putty material also flows into the voids generated without filling, and it is prevented that a step is generated in each of the through holes 4a and 4b after the putty material is cured, and the putty material is uniformly and evenly applied to the wallpaper. Adhesiveness and aesthetics can be improved.

1,1a-1f Base material for wall corner W wall W1 Wall corner part W2, W3 Wall surface W4 Crossing line 2a, 2b Band-shaped part 3 Connecting part 4a, 4b Through hole 6a, 6b Protruding part 8a, 8b Protruding part

Claims (3)

A pair of strips made of synthetic resin, each side extending in parallel adjacent to each other,
It is made of synthetic resin and includes a connecting portion that connects each one side portion.
Each band-shaped portion is
The first ridge extending in the longitudinal direction of the strip,
It has a first ridge and a second ridge extending parallel to the first ridge at intervals in the width direction perpendicular to the longitudinal direction.
A plurality of through holes are provided between the first ridge and the second ridge at intervals in the longitudinal direction .
The first ridge and the second ridge have a protrusion height from one surface of the strip-shaped portion of 0.05 to 0.2 mm, and the first ridge and the second ridge have a longitudinal direction. A base material for wall corners characterized by a triangular cross-sectional shape perpendicular to . The protrusion height from one surface of the strip-shaped portion is 0.05 to 0.2 mm between the through holes adjacent to the longitudinal direction, and the cross-sectional shape perpendicular to the longitudinal direction is triangular. The base material for a wall corner according to claim 1, wherein a third ridge extending in the longitudinal direction is provided. The base material for wall corners according to claim 1 or 2, wherein the apex angle θ of the first and second ridges is 30 ° ≦ θ ≦ 120 ° .

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