JP2001279902A - Lath and external facing structure using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quantity and workability of mortar works on a metal lathing by proposing a new lath solving the defect of an external facing structure using a corrugated lath and an external facing structure using the new lath. SOLUTION: Knurls 1a, 1a, etc., in fixed height are formed to one surface of a plate-shaped metal gauze in a scattered manner in the lath 1. It is desirable that the lath 1 is manufactured by a cold drawing cutting method and has the conditions of the following (1)-(5) in this case. (1) A long side has 24 mm or more and a short side 12 mm or more in the diagonal size of a lath mesh. (2) The plate thickness of an original sheet has 0.6-0.9 mm. (3) The feed (notch pitches) of the original sheet is 0.73-1.24 mm. (4) Lath density is 0.7-1.2 (kg/m2). (5) The number of knurls is 15-55 (number/m2).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a lath used as a base for mortar coating, and an exterior structure using the same.

[0002]

2. Description of the Related Art A lath is a base material for a painted wall and a painted ceiling. A metal lath, which is a kind of a lath, is formed by cutting notches at regular intervals on a thin steel sheet or a hot-dip galvanized steel sheet. It is manufactured by a normal-temperature stretching cutting method in which the film is stretched in a direction orthogonal to that of the above.

Here, the shape of a waveform lath, which is a kind of metal lath, is shown in FIG. As shown in the figure, the waveform lath 1 ′ is a rectangular wire mesh having a wavy cross section as a whole, and peaks A and valleys B are alternately arranged at regular intervals in the short side direction to form a waveform. B extends in parallel with the long side.

When this corrugated lath 1 'is used as a mortar coating base on a wooden outer wall, as shown in FIG. 16, a waterproof paper 2' is tuckered on the outdoor side of the outer wall lower cladding plate 3, and further, the outdoor side is covered with the waterproof paper 2 '. Then, the corrugated lath 1 ′ is tuckered, and mortar 4 is further applied.

[0005]

However, the exterior structure using the corrugated lath 1 'has the following problems. (1) One of the criteria for determining the specifications of the lath is the mass of the lath per unit projected area (referred to as “lath density” in this specification). However, since the corrugated lath 1 'is a cross-sectional waveform and has a large actual surface area per unit projected area, if the lath density is kept constant from the viewpoint of cost and the like, the cross section of the wire becomes smaller than that of a flat lath or the like, and the whole is softly bent. It will be easier. Therefore, the peaks A and the valleys B are crushed by the iron pressure when the mortar 4 is applied, and the corrugated lath 1 ′ sinks toward the lower wall 3 of the outer wall (FIG. 17).
(See (a)), even though the mortar 4 having the regular thickness is intended to be applied, the mortar 4 is actually insufficient in thickness (the required thickness of the mortar 4 for the fire prevention function of the outer wall of the mortar). Is not assured), which is problematic from the viewpoint of quality assurance.

(2) As described in (1), the corrugated lath 1 'is likely to sink due to the iron pressure. Therefore, in actual construction, the corrugated lath 1' should not be subjected to iron pressure so as not to sink. Tend to. Then, due to such a shortage of the iron pressure, the mortar 4 is insufficiently wrapped around the back side of the corrugated lath 1 ′, and a hollow portion (nest) where the mortar 4 is not applied is generated. The occurrence of such nests is caused not only by the fact that the corrugated lath 1 'and the mortar 4 are not firmly adhered, but also that the corrugated lath 1' gradually rusts from a portion not covered with the mortar (alkali) 4. Because of this, the quality of the mortar-coated outer wall is greatly affected.

(3) The lath and the mortar adhere firmly,
In order for the mortar to be effectively reinforced by the lath, the center of gravity of the lath is ideally located at the middle of the mortar coating thickness. However, the height of the peaks A and the valleys B of the corrugated lath 1 ′ is set to about half of the coating thickness of the mortar 4, and the valleys B are fastened so as to come into contact with the lower wall of the outer wall 3. The center of gravity of the lath 1 'is located at a position deeper than the middle of the mortar 4 (the position closer to the lower wall 3 of the outer wall than the middle of the mortar 4) (see FIG. 17B). Therefore, the mortar 4 near the surface is not much reinforced, and cracks are easily generated on the surface of the mortar 4.

(4) From the viewpoint of ease of application of the mortar, it is better that the lath surface has less irregularities,
Since the corrugated lath 1 'has a corrugated cross section, the surface of the corrugated lath 1' requires a certain iron pressure when applying the mortar 4, and the workability is poor.

(5) Since the corrugated lath 1 ′ is soft and easily bent for the reason described in (1), the corrugated lath 1 ′ is set in order to prevent the corrugated lath 1 ′ from sinking when the mortar 4 is applied. It is necessary to shorten the pitch of the tucker for fastening the outer wall 3 to the lower wall 3 of the outer wall. However, when the fastening pitch is shortened, the number of holes formed in the waterproof paper 2 ′ increases, the waterproof performance of the waterproof paper 2 ′ decreases, and the outer wall lower cladding 3 absorbs moisture. As a result, the outer wall lower cladding 3 warps (the outer wall lower cladding 3 bulges), and the corrugated lath 1 ′ fastened to this at the short pitch receives the behavior of the outer wall lower cladding 3 properly.
The mortar 4 is easily broken.

(6) Since the waterproof paper 2 'generally has a property of being more easily stretched in the width direction (the direction of the arrow in FIG. 16) than in the length direction for the reason of manufacturing, the waterproof paper 2' The waterproof paper 2 'itself sags in the width direction due to its own weight at the time of attaching. Also, the peak A and the valley B of the waveform lath 1 '
Are arranged so as to extend in the horizontal direction, so that the slack of the waterproof paper 2 ′ tends to gather on the back side of the mountain A of the wavy lath 1 ′. Therefore, except for the case where the waterproof paper 2 ′ is non-hygroscopic, it has permeated into the outer wall lower cladding 3 due to moisture originally contained in the outer wall lower cladding 3 or rainfall before the waterproof paper 2 ′ is attached. The waterproof paper 2 ′ has a horizontal stripe pattern along the back side of the mountain A of the corrugated lath 1 ′ due to moisture, rain after the pasting of the waterproof paper 2 ′, moisture in the air, moisture contained in the applied mortar 4 and the like. Swell to form For this reason, the coating thickness of the mortar 4 becomes unbalanced, and a horizontal stripe crack occurs on the surface of the mortar 4 (see FIG. 17B).

(7) Except in the case where the waterproof paper 2 ′ is made of a material that does not particularly absorb water or has been processed to prevent water absorption, the moisture contained in the applied mortar 4 does not contain the waterproof paper 2 ′. , The outer wall lower covering plate 3 absorbs moisture. Then, the outer wall lower cladding plate 3 is exposed, and cracks are generated on the surface of the mortar 4 as described in (5).

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a novel lath which solves the above-mentioned drawbacks of the exterior structure using the corrugated lath 1 ', and use the lath. The present invention is to improve the quality and workability of lath mortar construction by proposing an improved exterior structure.

[0013]

The invention according to claim 1 is
A lath characterized in that bumps having a constant height are formed on one side of a flat metal mesh by scattered points.

The shape of such a lath is close to a flat lath. When the lath density is constant, the cross section of the wire becomes larger than that of the corrugated lath, and it becomes difficult to sink due to the iron pressure when applying the mortar. Shortage is unlikely to occur. In addition, since it is difficult to sink by the iron pressure, the pitch of the fasteners (tucker needles, claw nails, etc.) for fastening the lath to the lower wall of the outer wall can be lengthened. It is also possible to prevent the vicious cycle of → “Rolling due to moisture absorption of the outer wall underlaying plate” → “Mortar cracking due to the behavior of the outer wall underlaying plate”. Further, since the lath is unlikely to sink, a trowel pressure can be applied so that the mortar can be firmly wrapped around the back of the lath. As a result, the lath is completely covered with the mortar and is less likely to rust. In addition, the bumps formed on one side of the lath at a certain height act as spacers, so that the flat metal mesh area that occupies most of the lath faces the outer wall subbing plate at a fixed distance and faces in parallel with it. I do. Therefore, unlike a corrugated lath whose surface is wavy, it does not require much iron pressure when applying mortar, and the workability is good. Further, by setting the height of the bumps so that the flat metal mesh region of the lath is positioned at the middle of the mortar coating thickness, the mortar can be effectively reinforced by the lath, and the occurrence of cracks in the mortar can be suppressed.

The invention according to a second aspect is characterized in that the lath according to the first aspect is manufactured by a cold drawing method and satisfies the following conditions (1) to (5). . (1) The diagonal dimension of the lath is 24 (mm) or more on the long side 1
2 (mm) or more (2) The thickness of the original plate is 0.6 to 0.9 (mm) (3) The feed (step pitch) of the original plate is 0.73 to 1.24
(Mm) (4) Lath density 0.7 to 1.2 (kg / m ² ) (5) Number of bumps 15 to 55 (pieces / m ² )

As a result of repeating various construction experiments, the inventor has determined that the lath according to claim 1 is manufactured by the cold drawing method, and is determined by the diagonal dimension of the lath, the thickness of the original sheet, and the feed (step pitch). By setting the cross section of the wire rod, the lath density, and the number of bumps as described in the above (1) to (5), the number of bumps is reduced as much as possible, but it is difficult to bend due to the iron pressure, and the metal commonly used in the field is used. It was confirmed that a lath that could be cut with scissors and had good adhesion to mortar could be realized at low cost.

According to a third aspect of the present invention, in the lath according to the first or second aspect, the bump is provided with an identification display.

When the lath is fastened to the lower wall of the outer wall at the work site, the work is performed while aiming at a specified fastening pitch with the number of the laths. Work is rarely performed at the correct fastening pitch due to the flickering eyes. But,
As described above, the lath fastening pitch is an important factor that has a great influence on the quality of the lath mortar, and therefore, its operation originally requires high accuracy. Therefore, in the present invention, the position of the lath hump (the position where the lath is fastened) can be easily visually identified by giving a distinctive display to the lath hump in advance, and the accuracy of the fastening operation is improved.・ Easy to secure.

According to a fourth aspect of the present invention, in the lath according to any one of the first to third aspects, the bumps are subjected to a rust-proof treatment.

According to such a lath, the bumps which are not completely buried in the mortar do not rust even after the construction, so that rust progresses from here to the flat wire mesh region of the lath, and the mortar becomes Neutralization can be prevented.

According to a fifth aspect of the present invention, there is provided a waterproof surface material attached to the outdoor side of the outer wall lower cladding plate, and the waterproof surface member is fastened to the outer wall lower cladding plate on the outdoor side of the waterproof wall member. An exterior structure comprising: the lath according to any one of claims 1 to 4; and mortar that includes the lath and is applied to the outdoor side of the waterproof surface material.

In such an exterior structure, since the lath is used as a base for mortar coating instead of a corrugated lath, it is easy to secure a coating thickness of the mortar, the lath is hardly rusted, cracks in the mortar can be suppressed, and workability can be improved. It can enjoy the advantages mentioned so far, such as good.

According to a sixth aspect of the present invention, in the exterior structure according to the fifth aspect, the waterproof surface material includes an asphalt compound layer, and has an uneven surface formed by forming a large number of projections on the indoor side. It is characterized by.

In such an exterior structure, since the waterproof surface material includes an asphalt compound layer having an extremely high waterproof property, it is possible to prevent the lower wall of the outer wall from absorbing moisture and to suppress the occurrence of cracks in the mortar due to the unevenness of the lower wall of the outer wall. it can. Also,
Since the asphalt compound layer has a large cold flow property and viscoelasticity, the holes in the waterproof surface material are fixed by the fasteners that fasten the lath to the subwall of the outer wall, and the repair function of the waterproof surface material itself (nail hole sealing function) Immediately closed, the waterproof function of the waterproof surface material is not impaired. In addition, in the case where the outdoor surface of the waterproofing surface material is the asphalt compound layer as it is, since the waterproofing surface material does not absorb rainwater or moisture in the mortar during construction and does not cause rash,
The generation of cracks due to the imbalance of the mortar coating thickness can be suppressed.

According to a seventh aspect of the present invention, in the exterior structure according to the sixth aspect, the waterproof face material has a base layer made of non-hygroscopic fiber on the outdoor side.

Since the base layer on the outdoor side of the waterproof surface material in such an exterior structure is made of non-hygroscopic fiber, the waterproof surface material can be applied in the same manner as when the outdoor surface of the waterproof surface material is the asphalt compound layer as it is. It is possible to suppress the occurrence of cracks due to imbalance in the mortar coating thickness without absorbing rainwater in the mortar or moisture in the mortar and causing rash.

According to an eighth aspect of the present invention, in the exterior structure according to any one of the fifth to seventh aspects, the hump in one lath and the hump in the other lath overlap with each other. Are connected.

In such an exterior structure, since the bumps are overlapped when connecting two or more laths, the bumps are not crushed by the iron pressure or the like. It is reliably held in the middle. Further, by overlapping the bumps, two or more laths can be easily connected, and the workability is improved.

[0029] According to a ninth aspect of the present invention, in the exterior structure according to any one of the fifth to eighth aspects, the fastener for fastening the lath to the lower wall of the outer wall is provided with an identification display. It is characterized by becoming.

According to such an exterior structure, since the fasteners such as the tucker needles and the claw nails are provided with an identification display, the area where the fasteners are already installed and the fasteners are still installed. The range that is not present can be easily distinguished visually, and the workability and quality can be improved.

According to a tenth aspect of the present invention, in the exterior structure according to any one of the fifth to ninth aspects, the long corner ruler fixed to the outside corner of the lower wall of the outer wall is provided. An exterior structure in which a lath is fastened to an outer wall lower cladding via an outer wall, wherein the corner ruler is fixed along two outdoor corners of the outer wall lower cladding; The outer angle formed by the corner mounting portion of the side is bisected, and the lath support portion for supporting the protruding corner portion of the lath has a triangular cross section.

In such an exterior structure, the lath is fastened to the outside corner of the outer wall subboard through the corner ruler having a three-pronged cross section, so that the flat metal mesh region occupying most of the lath is formed at the corner. , The mortar coating thickness is reliably maintained at the middle level.

According to an eleventh aspect of the present invention, in the exterior structure of the tenth aspect, a mortar insertion hole is formed in the lath support portion.

In such an exterior structure, since the lath support portion of the corner ruler has a high degree of openness, the cracks of the mortar at the corner portion are formed despite the alien material being embedded in the mortar. Cracking) can be suppressed.

[0035]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the description, the same elements will be denoted by the same reference symbols, without redundant description.

<First Embodiment> (1) Shape of Lath The lath 1 shown in FIG. 1 has a long side 1829 (mm) and a short side 914.
(Mm) are formed on one side of a rectangular flat wire mesh with bumps 1a, 1a,... Having a height of 10 (mm). As shown in FIGS. 2 and 3, this lath 1 is fastened to the lower wall 3 of the outer wall by driving a tacking tool such as a tucker needle or a claw nail inside the hump 1a and embedded in the mortar 4. In this state, a part of the exterior structure is formed. At this time, the bumps 1a are arranged such that the flat wire mesh region (the portion other than the bumps 1a) occupying most of the lath 1 is parallel to the outer wall sub-plate 3 at regular intervals (ideally to the middle of the coating thickness of the mortar 4). Plays a supporting role.

Here, since the lath 1 has a shape close to a flat lath, when the lath density is constant, the actual surface area is smaller and the cross section of the wire becomes larger than that of the corrugated lath. Therefore, since the lath 1 is unlikely to sink due to the iron pressure when the mortar 4 is applied, the coating thickness of the mortar 4 can be easily secured. In addition, since a trowel pressure can be applied to the back side of the lath 1 so that the mortar 4 can turn around firmly, nests are hardly generated in the mortar 4. Furthermore, since there is almost no unevenness on the surface of the lath 1, there is not much need for an iron pressure when applying the mortar 4, and the workability is good.

(2) Lath Size The smaller the lath, the more advantageous it is from the viewpoint of firmly adhering the lath 1 and the mortar 4 and suppressing the lath 1 from sinking in order to suppress the occurrence of cracks in the mortar 4. . However, if the lath is made too fine, the mortar 4 becomes difficult to wrap around the back of the lath 1 and nests are generated. This means that the laths become finer, two or more laths 1,
Are remarkable in the connecting portion where 1,... Overlap (see FIG. 6). Therefore, the inventor repeated the construction experiment,
If the diagonal dimension of the lath is longer than R = 24 (mm) and shorter than S = 12 (mm) (see FIG. 1), the back side of the connecting portion where the three laths 1,1,1 overlap. It was also confirmed that the mortar 4 was sufficiently turned around.

Although only the lower limit of the dimensions of the lath is shown here, it is not intended that the coarser the lath, the better. If the lath is too coarse, the lath 1 is likely to sink as described above, and the adhesion between the lath 1 and the mortar 4 is reduced. However, since the dimensions of the lath are correlated with the cross section of the wire and the lath density as described later, the upper limit value is substantially defined by these factors.

Incidentally, the size of the lath is defined by the diagonal dimension of the lath in the cold drawing method, which is the mainstream of the manufacturing method of the lath 1, after the notch is formed at regular intervals in the original sheet, and This is because the lath shape is inevitably rhombic because it is stretched in a direction perpendicular to the direction.

(3) Cross Section and Lath Density of Lath Wire The cross section and lath density of the lath 1 are naturally important factors that determine the flexibility of the lath 1 (the difficulty of sinking). Here, as shown in FIG. 4 (a), a notch of feed (notch pitch) p is formed on the original sheet having the thickness t by the normal temperature drawing and cutting method, and the original sheet is perpendicular to the notch as shown in FIG. 4 (b). When stretched, the final lath 1 as shown in FIG.
Has a width t and a length p. Then, the material of the original plate, the width t and the width p of the wire section, and the distance u between the wires are provided.
Is determined, the lath density is determined. Conversely, if the material of the original sheet, the width t and the width p of the wire cross section, and the lath density are determined, the distance u between the wires is determined, and the size of the lath can be derived in combination with the length of the notch. That is, there are correlations among the five factors of the dimensions of the lath, the material of the original sheet, the width of the wire (thickness of the original sheet) t, the criterion of the wire (feed of the original sheet) p, and the lath density. If four are determined, the other one is automatically determined. As a result, it was confirmed that an ideal lath was obtained when the lath density was 0.7 to 1.2 (kg / m ² ).

Here, when the original sheet is a cold-rolled steel sheet and the diagonal dimension of the lath is a long side 26 (mm) and a short side 13 (mm), the sheet thickness t of the original sheet, feed (step pitch) p, Table 1 shows an example of the relationship of the lath density. The thickness t of the original plate
Are three types of 0.6, 0.7 and 0.8 (mm) in consideration of the reality, but can be set arbitrarily within the range of 0.6 to 0.9 (mm).

[0043]

[Table 1]

By the way, if the width p and the width t of the wire cross section are extremely different, the lath 1 will be rounded in the manufacturing process. From this viewpoint, it is desirable that the wire cross section is close to a square. In addition, the cutting workability of the lath on site depends on the wire cross section, and if the wire cross section is too large, it will not be possible to cut the lath with versatile gold scissors,
The wire p cannot be so large.

(4) Number of bumps In order to suppress the occurrence of cracks in the mortar 4 due to the behavior of the lower wall 3 of the outer wall, the smaller the number of contact points between the lath 1 and the lower wall 3 of the outer wall, that is, the unit projection area of the lath 1 Bumps around 1
It is advantageous to reduce the number of a, but too much
If you reduce the number of a, to prevent the lath 1 from sinking,
It is necessary to increase the cross section (t, p) of the wire and increase the lath density. That is, if the flat metal mesh region of the lath 1 is compared to a beam, the distance between the bumps 1a, 1a corresponds to the distance between the fulcrums of the beam. If so, it is necessary to increase the flexural rigidity of the flat wire mesh area (to increase the flexural rigidity of the beam) in order to prevent the flat wire mesh area from sinking too much. If the size is increased, the cutting workability of the lath 1 and the bending workability at the corner portion (see FIG. 12B) are reduced, and the cost is increased.

From such a viewpoint, as shown in FIG. 5, the lath 1 having a long side of 1829 (mm) and a short side of 914 (mm) is used.
At a pitch of 150 (mm) in a vertical and horizontal lattice
(Lump) 1b, 1a,.
The upper limit of the number a was set to 55 (pieces / m ² ). If the bumps 1a are formed more densely than this, the number of contact points between the lath 1 and the outer wall lower cladding plate 3 becomes too large, which is not desirable in suppressing cracks in the mortar 4.

Conversely, if the lath 1 does not sink under normal iron pressure when applying the mortar 4, the bump 1a
It is desirable that the number of The inventor conducted an experiment in which the number of humps 1a was variously set in the field.
Under the lath specification shown in the above, the number of bumps is 15 (pieces / m ² )
In this case, it was confirmed that the sinking of the lath 1 that would cause a problem did not occur. The arrangement of the bumps 1a can be determined as appropriate, and may be a staggered arrangement in addition to the lattice arrangement as shown in FIG.

(5) Planar size of the hump Since the hump 1a is a contact point between the lath 1 and the lower wall 3 of the outer wall, if the contact area is reduced, the lath 1 will be affected by the behavior of the lower wall 3 of the outer wall. On the other hand, the strength of the bump 1a itself is reduced. Therefore, the planar size of the hump 1a must be determined in a well-balanced manner. Here, as shown in FIG. 7, the hump 1a is formed by excavating four laths afterwards. Of course, the present invention is not limited to this. For example, the bump 1a may be formed by denting nine laths.

(6) Height of the bumps The height of the bumps 1a determines the installation position of the flat wire mesh region of the lath 1, and is a very important factor in considering the occurrence of cracks in the mortar 4. As described above, in order for the mortar 4 to be effectively reinforced by the lath 1, it is ideal that the center of gravity of the lath 1 be located at the middle of the thickness of the mortar 4. Therefore, in this case, the height of the bump 1a is set to 10 mm in order to locate the flat wire mesh region of the lath 1 in the middle of the mortar coating thickness set to 20 mm, but it is of course limited to this. However, the height of the bump 1a is appropriately changed depending on the thickness of the mortar 4 applied.

(7) Indication of the distinctiveness of the hump When the lath 1 is fastened to the lower wall 3 of the outer wall at the site, it is necessary to work with the number of the laths and assuming a specified fastening pitch. Actually, since the eyes of the worker flicker due to the laths running in the vertical and horizontal directions, the work is rarely performed at an accurate fastening pitch. However, as described above, since the fastening pitch of the lath 1 has a great effect on the occurrence of cracks in the mortar 4, high accuracy is originally required for the work. Therefore, here the bumps 1a, 1
a,.. is painted with a red paint so that the position of the hump 1a can be easily identified visually when it is superimposed on the waterproof paper 2 ′ (usually a black color). The accuracy and ease of the work of fastening the lath 1 are ensured. Of course, the distinctive display of the bump 1a is not limited to this, and the bump 1a may be overlaid on the waterproof paper 2 '.
Any means can be used as long as it can be easily identified visually.

It is desirable to use a rust-preventive paint for the colored paint of the bump 1a. This is because the bumps 1a are not completely embedded in the mortar 4 unlike the flat wire mesh region, and are placed in an environment that is easily rusted even after construction. If the bumps 1a are rusted, rust progresses from here to the flat wire mesh region and causes the mortar 4 to be neutralized, so that the lath mortar structure is catastrophically affected.

(8) Connecting portion of laths When a plurality of laths 1, 1,... Are fastened to the outer wall lower cladding plate 3, when the laths 1, 1,. , And the lower ends of the upper laths 1, 1,... Are staggered on the upper end of the lower laths 1, 1,. At this time, if the bumps 1a, 1a,. Is done. In addition, the bumps 1a, 1a, ...
When the lamination is repeated, the positioning and connecting work of the lath 1 becomes easy, and the workability is improved.

(9) Fastener A tacker needle for fastening the lath 1 to the outer wall lower cladding 3.
A clasp such as a claw is provided with an identification display. For example, the shoulder portion of the tucker needle 5 surrounded by a dotted line in FIG. 7 is coated with a yellow paint (preferably a rustproof one). Thus, the hump 1a of the lath 1 (red)
And the waterproof paper 2 '(black) are made different in color tone, so that the range where the tucker needle 5 is already set and the range where the tucker needle 5 has not yet been set can be easily visually discriminated. The workability and quality are improved. Of course, the distinctive display of the fastener is not limited to this, and a color tone, a pattern, or the like different from the waterproof paper 2 ′ or the bump 1a is attached to a part or all of the fastener, Even if it overlaps with the waterproof paper 2 'or the bump 1a, it is sufficient if the presence or absence of the fastener can be easily identified visually. In order to prevent the progress of rust, the material of the fastener is made of SUS (stainless steel), or the fastener is subjected to rust prevention treatment (painting). It is desirable to ensure the durability of the lath mortar structure by increasing the diameter of the material.

<Second Embodiment> FIG. 8 is a partially cutaway perspective view showing a second embodiment of the exterior structure according to the present invention. The exterior structure shown in the figure is a waterproof paper 2 ′ in the first embodiment.
Is replaced with a special waterproof face material 2. The waterproof surface material 2 includes an asphalt compound layer 2b, and has an uneven surface 2e formed on the indoor side by forming a large number of projections 2d, 2d,. Below, waterproof surface material 2
Is described.

(1) Basic Functions The basic functions of the waterproof face material 2 are roughly classified into three. The first function is a function as a waterproof material for preventing rainwater or moisture in the mortar 4 from entering the inside of the outer wall from the outside from penetrating into the lower wall 3 of the outer wall, and the asphalt compound layer 2b plays this role. . The second function is a function of securing a ventilation space for releasing moisture entering the outside wall from outside, moisture in the mortar 4, or moisture entering the inside of the exterior wall from a defective portion of the vapor barrier 6 to the outside. The uneven surface 2e bears this. Further, the third function is to fix the lath 1 to the outer wall lower cladding 3 with a fastener such as a tucker needle or a claw nail, thereby repairing the hole made in the waterproof surface material 2 by itself, and maintaining the waterproof performance. This is carried out by the asphalt compound layer 2b. And in the present invention,
In order to prevent the vicious circulation of "increase in the number of holes made in the waterproof surface material" → "irregularity due to moisture absorption of the outer wall lower cladding" → "mortar cracking due to the behavior of the outer wall lower cladding" Because of the adoption, the first function and the third function are particularly important.

(2) Constitution Pattern The layer constitution of the waterproof face material 2 includes four patterns as shown in FIG. The waterproof face material 2A shown in FIG.
It has a three-layer structure in which a base layer 2a, an asphalt compound layer 2b, and a surface layer 2c are laminated in order from the outdoor side, and an uneven surface 2e is formed by a large number of protrusions 2d, 2d, ... scattered on the indoor side of the surface layer 2c. I have. The waterproof surface material 2B shown in FIG. 9B has a two-layer structure in which a base layer 2a and an asphalt compound layer 2b are sequentially stacked from the outdoor side.
An uneven surface 2e is formed by a large number of protrusions 2d, 2d,... Scattered on the indoor side of the asphalt compound layer 2b. The waterproof surface material 2C shown in FIG. 9C has a two-layer structure in which an asphalt compound layer 2b and a surface layer 2c are sequentially stacked from the outdoor side, and a number of protrusions 2d, 2d scattered on the indoor side of the surface layer 2c. , Form an uneven surface 2e. The waterproof surface material 2D shown in FIG. 9D has a single-layer structure of only the asphalt compound layer 2b, and the uneven surface 2e is formed by a large number of protrusions 2d, 2d,... Scattered on the indoor side of the asphalt compound layer 2b. Is formed.

(3) Asphalt compound layer Here, the asphalt compound layer 2b is a layer composed of an asphalt compound having cold flow property and viscoelasticity such as asphalt or rubber-modified asphalt. It mainly has a function as a waterproof material for preventing rainwater that has entered and moisture in the mortar 4 from penetrating into the lower wall 3 of the outer wall.

Then, the asphalt compound layer 2b
Has a cold flow property and a viscoelasticity, and also has a function of self-closing and repairing a hole made by a fastener for fastening the lath 1 to the outer wall lower cladding plate 3 (a nail hole sealing function). Therefore, the waterproof function of the waterproof surface material 2 is not impaired by the fastener. From such a viewpoint, each of the waterproof surface materials 2A to 2D has a configuration including the asphalt compound layer 2b.

(4) Uneven Surface The waterproof surface material 2A shown in FIG. 9 (a) and the waterproof surface material 2C shown in FIG. 9 (c) are formed by embossing paper or film with a predetermined unevenness. Are raised and the surface layer 2c on which the uneven surface 2e is formed by floating the protrusions 2d, 2d,... Is bonded to the asphalt compound layer 2b. Here, the uneven surface 2e of the surface layer 2c may be formed by arranging a large number of protrusions 2d, 2d,. The waterproof face material 2B shown in FIG. 9 (b) and the waterproof face material 2D shown in FIG. 9 (d) are formed by embossing the indoor surface of the asphalt compound layer 2b itself so that a number of protrusions 2d, 2d, Are raised to form an uneven surface 2e.

In any case, the uneven surface 2e has a function of securing a ventilation space on the indoor side of the waterproof surface material 2 by a gap between the large number of protrusions 2d, 2d,. Each of the 2Ds has an uneven surface 2e. Here, the arrangement form of the projections 2d, 2d,... Can be determined completely freely, but an arrangement having no directionality is preferable in consideration of the ventilation direction. Further, the height of the protrusion 2d (the difference in height of the uneven surface 2e) is preferably 1 mm or more. From this projection 2
If the height of d is small, the gap between the projections 2d, 2d,... is too narrow to function as a ventilation space. A more desirable height of the projection 2d is 2 to 10 mm. If the height of the projection 2d is larger than 10 mm, the general-purpose tucker needle cannot be used. Further, the height of the particularly desirable projection 2d is 2
４4 mm. This is because if the height of the projection 2d is 4 mm or less, the waterproof face material 2 can be rolled like a conventional waterproof paper, carried into the site, and constructed as before.

(5) Base Layer The base layer 2a is not a highly hygroscopic rug base paper made of waste paper, cotton, or shavings such as a waterproof paper portion of a conventional waterproof paper or a lath net with a waterproof paper, but is a synthetic fiber that does not easily absorb moisture. (Eg, polyester, polyethylene, polypropylene) nonwoven fabrics, glass fiber woven or nonwoven fabrics, or woven or nonwoven fabrics obtained by blending these.

The base layer 2a is not essential for the waterproof surface material 2, but in the case shown in FIGS. 9A and 9B, it becomes a base surface when the asphalt compound layer 2b is formed by coating. The waterproof face materials 2A and 2B having such a base layer 2a are arranged with the base layer 2a facing the outdoor side. However, since the base layer 2a is made of non-hygroscopic fiber,
It hardly absorbs rainwater during construction and water in the mortar 4 and does not cause rash. Therefore, it is possible to eliminate as much as possible the cause of crack generation in the mortar 4 after curing due to imbalance in coating thickness. 9C and 9D without the base layer 2a.
In this case, the same effect can be obtained because the asphalt compound itself is a non-hygroscopic material.

<Adjustment of Outer Corner> If the above-described lath 1 is applied to the outer corner as it is, cracks are likely to occur in the mortar 4 at the corresponding portion, and the workability is poor. That is, as shown in FIG.
In order to apply the mortar 4 to the protruding corner when the end near the protruding corner is pressed against the outer wall lower cladding plate 3 and tacked down, first, as the undercoat, the mortar is brought to the surface position of the laths 1 and 1 (indicated by dotted lines in the figure) 4 (FIG. 10 (b)),
Next, the guide ruler 7 is installed so as to fit the guide portion 7a at the protruding corner of the undercoated mortar 4 ((c)), and finally the finish mortar 4 is applied with the target end portion 7b of the guide ruler 7 as a target. ((D)).

However, according to such a method, since there is no ruler at the protruding corner at the stage of undercoating the mortar 4, the undercoating cannot be performed well to the dotted line position (FIG. 1).
0 (b)), as a result, the installation position of the guide ruler 7 is shifted (see (c)), and the coating thickness of the mortar 4 is likely to be inaccurate (see (d)). Is problematic. Further, since the lath 1 does not enter the middle of the coating thickness of the mortar 4 in the protruding corner portion and the mortar 4 is not sufficiently reinforced, there is also a problem that the mortar 4 is easily broken at this portion. Furthermore, since the guide ruler 7 having poor adhesion to the mortar 4 is embedded in the mortar 4, there is also a problem that the mortar 4 is easily broken on both sides of the tip 7b of the guide ruler 7 (see FIG. 10D).

Such a problem can be solved by using a long corner ruler 8 as shown in FIG. The corner ruler 8 is provided with two sides of corner mounting portions 8a, which are fixed along the outside corners of the outer wall lower cladding 3 on the outdoor side.
8a and a lath support portion 8b that bisects the outer angle formed by the corner mounting portions 8a, 8a have a triangular cross section.

The lath support portion 8b has an appropriate bending strength. As shown in FIG.
This is because the lath 1 is bent using the tip of b as a ruler.
Also, the mortar insertion holes 8c, 8
c, ... are drilled. This is because when the foreign material is embedded in the mortar 4, the mortar 4 is easily broken at the site, and therefore, by increasing the degree of opening of the lath support portion 8 b, the mortar 4 is prevented from being cracked at the protruding corner. It is provided. The mortar insertion hole 8
The shape of c is not limited to this.
1 (b) and (c).

Next, how to use the corner ruler 8 will be described. First, the corner attachment portions 8a, 8a of the corner ruler 8
Is fixed with a tucker needle or the like along the outside corner of the lower wall 3 of the outer wall (see FIG. 12 (a)), and then the lath 1 is bent at a right angle using the tip of the lath support portion 8b as a ruler. The lath 1 is fastened around the corner (same (b)), and the mortar 4 is primed (same (c)) and finished (same as (d)). At this time, since the length of the lath supporting portion 8b is about ^21/2 of the height of the hump 1a of the lath 1, the flat wire mesh region of the lath 1 is also provided near the outer corner under the outer wall subplate. 3, and the lath 1 is surely held at the middle of the mortar 4 at the protruding corners. Therefore, the undercoating of the mortar 4 is facilitated, so that the finish coating of the mortar 4 can be performed accurately.
It is unlikely that the overall coating thickness will be insufficient. In addition, the mortar 4 at the protruding corner is sufficiently reinforced by the lath 1 and the lath support portion 8 is formed by the mortar insertion hole 8c.
Since the degree of opening of b is increased, mortar 4
Is difficult to break.

Another solution is to use a corner lath 9 formed by bending a flat lath into a substantially Ω-shaped cross section as shown in FIG. That is, first, as shown in FIG. 14A, the corner lath 9 is fastened to the protruding corner portion of the outer wall lower cladding plate 3, and then the end near the protruding corner portion of the laths 1 and 1 is overlaid on the corner lath 9. Then, the mortar 4 is fastened to the outer wall lower cladding 3 (FIG. 14B), and the mortar 4 is primed (FIG. 14C) and finished (FIG. 14D). Also in this case, since the corner lath 9 is replaced by a ruler and the undercoat of the mortar 4 is easy even at the protruding corner portion, the finish coating of the mortar 4 can be performed accurately.
It is unlikely that the overall coating thickness will be insufficient. Further, the mortar 4 at the protruding corner is sufficiently reinforced by the corner lath 9 and the guide ruler 7 having poor adhesion to the mortar 4 is not used, so that the mortar 4 is hard to be broken at the protruding corner.

[0069]

According to the first or fifth aspect of the present invention, the coating thickness of the mortar is less likely to be insufficient, the occurrence of cracks in the mortar can be suppressed, and the lath is less likely to rust, thereby improving the quality of the lath mortar construction. . In addition, workability is good because ironing pressure when applying mortar does not require much.

According to the second or fifth aspect of the present invention, in particular, while minimizing the number of bumps, it is hardly bent by the iron pressure, and can be cut with gold scissors generally used in the field, and can be cut with mortar. A lath with good adhesion can be realized at low cost.

According to the third or fifth aspect of the present invention, the fastening position of the lath can be easily visually identified, and the accuracy and ease of the fastening operation can be ensured. -Workability is further improved.

According to the invention as set forth in claim 4 or claim 5, the hump portion is particularly resistant to rust, and it is possible to effectively prevent the rust from rusting and neutralizing the mortar. Quality is further improved.

According to the sixth aspect of the present invention, it is possible to suppress the occurrence of cracks in the mortar due to the swelling of the underlaying plate on the outer wall, and the waterproof function of the waterproof face material is not deteriorated.

According to the seventh aspect of the invention, in particular, the waterproof face material does not absorb rainwater during the construction or the water in the mortar to cause crushing, and cracks caused by imbalance in the coating thickness of the mortar. Can be suppressed.

According to the eighth aspect of the present invention, the bumps are not crushed by the iron pressure or the like, and the lath is reliably held at the middle mortar thickness, so that the quality is improved. Also,
By overlapping the bumps, two or more laths can be easily connected, and workability is also improved.

According to the ninth aspect of the present invention, it is possible to easily visually discriminate between the range where the fastener is already installed and the range where the fastener is not yet installed. Is improved.

According to the tenth aspect of the present invention, the lath is reliably held at the middle of the mortar coating thickness even at the protruding corner, so that the quality and workability are improved.

According to the eleventh aspect of the present invention, it is possible to suppress the occurrence of cracks (splits) in the mortar at the corners, even though the foreign material is embedded in the mortar.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an embodiment of a lath according to the present invention.

FIG. 2 is a partially cutaway perspective view illustrating a first embodiment of an exterior structure according to the present invention.

FIG. 3 is a partially enlarged longitudinal sectional view of the same.

FIG. 4 is an explanatory diagram of a lath manufacturing method by a normal-temperature stretching cutting method.

FIG. 5 is a plan view for explaining the arrangement and number of bumps.

FIG. 6 is a partial elevation view showing a connecting portion between laths.

FIG. 7 is a perspective view of a tucker needle.

FIG. 8 is a partially cutaway perspective view showing a second embodiment of the exterior structure according to the present invention.

9 is a cross-sectional perspective view illustrating a configuration pattern of a waterproof face material illustrated in FIG.

FIG. 10 is a cross-sectional view for explaining a problem in a case where the lath shown in FIG.

FIG. 11A is a perspective view of a corner ruler,
(B), (c) is a partial side view which shows the example of arrangement of a mortar insertion hole.

FIG. 12 is a cross-sectional view showing a method of setting a protruding corner portion using the corner ruler shown in FIG. 11;

FIG. 13 is a perspective view of a corner lath.

FIG. 14 is a cross-sectional view illustrating a method of fitting a protruding corner portion using the corner lath shown in FIG.

FIG. 15 is a perspective view showing a conventional waveform lath.

16 is a partially cutaway perspective view showing a conventional exterior structure using the corrugated lath shown in FIG.

17 is a partially enlarged longitudinal sectional view for explaining a problem in the conventional exterior structure shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lath 1a ... Hump 1 '... Corrugated lath 2, 2A-2D ... Waterproof surface material 2a ... Base layer 2b ... Asphalt compound layer 2c ... Surface layer 2d ... Projection 2e ... Uneven surface 2' ... Waterproof paper 3 ... Outer wall lower plate 4 … Mortar 5… tucker needle 6… vapor barrier 7… guide ruler 7a… guide part 7b… tip part 8… corner ruler 8a… corner mounting part 8b… lath support part 8c… mortar insertion hole 9… corner lath A… mountain B… valley

Claims (11)

[Claims] 1. A lath characterized in that bumps having a constant height are formed on one surface of a flat metal mesh by scattered points. 2. The lath according to claim 1, wherein the lath is produced by a cold drawing method and satisfies the following conditions (1) to (5). (1) The diagonal dimension of the lath is 24 (mm) or more on the long side 1
2 (mm) or more (2) The thickness of the original plate is 0.6 to 0.9 (mm) (3) The feed (step pitch) of the original plate is 0.73 to 1.24
(Mm) (4) Lath density 0.7 to 1.2 (kg / m ² ) (5) Number of bumps 15 to 55 (pieces / m ² ) 3. The lath according to claim 1, wherein the bump is provided with an identification display. 4. The lath according to claim 1, wherein the bumps are subjected to a rust prevention treatment. 5. The waterproof surface material attached to the outdoor side of the outer wall lower cladding plate, and the waterproof surface material is fixed to the outer wall lower cladding plate on the outdoor side of the waterproof surface member. An exterior structure comprising: the lath according to claim 1; and mortar that includes the lath and is applied to the outdoor side of the waterproof surface material. 6. The exterior structure according to claim 5, wherein the waterproof surface material includes an asphalt compound layer, and has an uneven surface formed by forming a large number of projections on the indoor side. 7. The exterior structure according to claim 6, wherein the waterproof surface material has a base layer made of non-hygroscopic fiber on the outdoor side. 8. The method according to claim 5, wherein two or more laths are connected so that a hump in one lath and a hump in another lath overlap. Exterior structure. 9. The fixing device according to claim 5, wherein a fastener for fixing the lath to the outer wall underlaying plate is provided with an identification display. Exterior structure. 10. An exterior structure in which said lath is fastened to said outer wall lower cladding via a long corner ruler fixed to an outdoor corner of said outer wall lower cladding, said corner ruler being: A corner mounting portion of two sides fixed along the outside corner of the outer wall subboard, and an outer angle formed by the corner mounting portion of the two sides are bisected to support the corner of the lath. Presents a triangular cross section with the lath support part,
The exterior structure according to any one of claims 5 to 9, wherein: 11. The exterior structure according to claim 10, wherein a mortar insertion hole is formed in said lath support portion.