JP2012097521A - Lath with waterproof sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-manufacture lath with a waterproof sheet, which can increase a bearing capacity of the waterproof sheet while reducing the number of components.SOLUTION: In a lath 1 with a waterproof sheet, the waterproof sheet 2 is attached on an indoor side of a mesh-like lath material 3. The lath material 3 comprises a plurality of curved parts 31 that are curved to get away from the waterproof sheet 2, and a plurality of joints 32 that are provided between the adjacent curved parts 31 and joined to the waterproof sheet 2. A width dimension t2 of a wire rod 32a constituting a mesh of the joint 32 is larger than a width dimension t1 of a wire rod 31a constituting a mesh of the curved part 31.

Description

  The present invention relates to a lath with a waterproof sheet in which a waterproof sheet is attached to the indoor side of a mesh lath material.

Conventionally, for mesh laths used for the foundation or reinforcement of wet exterior materials such as mortar, so-called hump laths having a plurality of bump-like projections formed at predetermined intervals, or arcs that are opposite to each other in cross-sectional view There are known so-called corrugated laths in which the shapes are alternately continued, so-called rib laths in which linear reinforcing ribs are formed at predetermined intervals.
For example, Patent Document 1 discloses a rib lath in which reinforcing ribs are formed in parallel at predetermined intervals by bending a lath itself made of expanded metal into a valley shape in a cross-sectional view.

  Patent Document 2 discloses a composite lath obtained by further integrating a lath, a strength bone for reinforcing the lath, and a waterproof paper (waterproof sheet) on the strength bone. By attaching this composite lath to a plurality of trunk edges provided on the wall base, the waterproof paper placed between the adjacent trunk edges is supported by the hard bones, and even when mortar is constructed, the waterproof paper Becomes difficult to bend, and the air passage formed between the adjacent trunk edges is maintained.

JP 2005-344403 A JP 2008-240365 A

  However, with the rib lath described in Patent Document 1, it is necessary to bend the lath a plurality of times (for example, three times) in order to form the trough-shaped reinforcing rib, so that the manufacturing work becomes complicated. In addition, when the trough-shaped reinforcing rib is formed, the lath bend angle becomes large (a sharp angle), and thus the lath may be damaged.

  Further, in the composite lath described in Patent Document 2, since it is necessary to integrate the lath, the strength bone, and the waterproof paper, the number of parts increases and the manufacturing work becomes complicated. In addition, when the protrusion is formed by bending the strength bone in order to position the lath in the middle of the mortar layer, a gap is formed between the strength bone and the waterproof paper, and the supporting force of the waterproof paper is reduced.

  The present invention has been made to solve such a problem, and can provide a lath with a waterproof sheet that can improve the supporting force of the waterproof sheet while reducing the number of parts and can be easily manufactured. Let it be an issue.

  The present invention is a lath with a waterproof sheet in which a waterproof sheet is attached to the indoor side of a mesh-shaped lath material, and the lath material is adjacent to a plurality of curved portions curved so as to be separated from the waterproof sheet. A plurality of joints provided between the curved parts and joined to the waterproof sheet, and the wire constituting the mesh of the joint is wider than the wire constituting the mesh of the curved part It is characterized by large dimensions.

According to such a configuration, since the wire constituting the mesh of the joint portion to be joined to the waterproof sheet is formed larger in width than the wire constituting the mesh of the curved portion, the rigidity of the joint portion is large. Become. For this reason, the waterproof sheet can be supported by the joint portion having a high rigidity, so that the support force of the waterproof sheet is improved and it is difficult to bend.
In addition, since the rigidity of the curved portion is increased by the arch action, it is possible to maintain the separated state from the waterproof sheet without increasing the width of the wire constituting the mesh of the curved portion. Can be reduced.

  Moreover, since the lath material and the waterproof sheet are integrated through the joint portion, the lath with the waterproof sheet can be configured with two members. Furthermore, if the lath material is made of expanded metal, the width of the wire constituting the mesh can be easily adjusted by changing the spacing between the cuts at the stage of making the cuts in the metal plate that is the material of the expanded metal. Can do. Therefore, it is possible to simplify the manufacturing operation while reducing the number of parts.

  Further, in the lath with a waterproof sheet according to the present invention, one end side of the lath material is extended from one end side of the waterproof sheet, and the other end side of the waterproof sheet is the other end side of the lath material. It is preferable to have a configuration extending more than that.

  According to such a configuration, for example, when two laths with waterproof sheets are attached to the wall base in the vertical direction, the upper end side (the other end side) of the waterproof sheet of the lower laths with waterproof sheet is extended. The upper side of the lath waterproof sheet with the upper waterproof sheet is overlapped with the upper end side (the other end side) of the lath material with the upper waterproof sheet. The extended part of the lower end side (one end side) of the material can be overlapped. Therefore, since the lath material and the waterproof sheet can be doubled at the seam between the two laths with the waterproof sheet, the seam can be reliably reinforced.

  Moreover, in the lath with a waterproof sheet according to the present invention, it is preferable that a non-woven fabric is provided on the outdoor surface of the waterproof sheet.

  According to such a configuration, since the nonwoven fabric layer is provided on the outdoor side surface of the waterproof sheet, the adhesion between the wet exterior material such as mortar and the waterproof sheet can be enhanced. Moreover, when joining a waterproof sheet and a lath material with an adhesive agent, for example, the adhesive strength soaks into the nonwoven fabric layer, thereby improving the bonding strength between the two.

  ADVANTAGE OF THE INVENTION According to this invention, the support force of a waterproof sheet can be improved, reducing a number of parts, and the lath with a waterproof sheet which can be manufactured easily can be provided.

It is the perspective view which notched and showed a part of outer wall provided with the lath with a waterproof sheet which concerns on this embodiment. It is a perspective view of a lath with a waterproof sheet. It is the front view which expanded and showed the A section of FIG. It is the II sectional view taken on the line of FIG. It is explanatory drawing for demonstrating the manufacturing method of a lath material, (a) has shown the state which is manufacturing the curved part, (b) has each shown the state which manufactures the junction part. It is a vertical sectional view of a joint portion of a lath with a waterproof sheet.

  A lath with a waterproof sheet according to an embodiment of the present invention will be described in detail with reference to the drawings. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted.

FIG. 1 is a perspective view showing a part of an outer wall provided with a lath with a waterproof sheet according to the present embodiment.
As shown in FIG. 1, the outer wall 10 is a wooden structural wall that partitions the interior and the exterior of a building, and is constructed by a so-called wet method. The outer wall 10 includes a wall frame 11, a structural plywood 12, a moisture-permeable waterproof sheet 13, a plurality of trunk edges 14, 14,. Configured. In addition, although illustration is abbreviate | omitted, interior materials, such as a gypsum board and a wallpaper, are attached to the indoor side of the wall frame 11. FIG.

  The wall frame 11 is a wooden member serving as a skeleton of the outer wall 10, and the upper end of a vertical frame 11 a erected at a predetermined interval in the horizontal direction on a lower frame (not shown) is connected by the upper frame 11 b. By doing so, it is configured in a square frame shape.

  The structural plywood 12 is a plate-like member attached to the surface of the wall frame 11 on the outdoor side. By fixing the structural plywood 12 in the nail to the wall frame 11 at a predetermined pitch, the outer wall 10 functions as a load bearing wall.

  The moisture-permeable waterproof sheet 13 is a sheet having a property of transmitting moisture (water vapor) but not transmitting water. Thus, moisture on the indoor side can be released outdoors, and rainwater and the like can be prevented from entering the indoor side from the outdoor side.

  The plurality of trunk edges 14, 14,... Are thin wooden members formed vertically, and are fixed to the outdoor side of the moisture permeable waterproof sheet 13 with a predetermined interval in the horizontal direction. . The trunk edge 14 is a so-called ventilation trunk edge, and has a function of forming a ventilation path 16 between adjacent trunk edges 14, 14. Moreover, the trunk | drum 14 becomes an attaching part of the lath 1 with a waterproof sheet mentioned later.

  The lath 1 with the waterproof sheet is a member in which the waterproof sheet 2 and the lath material 3 are integrated. The lath 1 with the waterproof sheet is attached to the outdoor side of the trunk edge 14 with, for example, a tucker or the like with the waterproof sheet 2 facing the indoor side. The waterproof sheet 2 is disposed so as to straddle the ventilation path 16. The lath 1 with the waterproof sheet will be described in detail later with reference to FIG.

  The wet exterior material 15 is a member that constitutes the external appearance of the outer wall 10, and is composed of a plastering material such as cement mortar or plaster, for example. The wet exterior material 15 is applied so as to embed the lath material 3 on the outdoor side of the waterproof sheet 2 of the lath 1 with waterproof sheet. Thereby, the wet exterior material 15 will be supported by the lath 1 with a waterproof sheet.

FIG. 2 is a perspective view of a lath with a waterproof sheet.
As shown in FIG. 2, the lath 1 with a waterproof sheet is formed by integrating a waterproof sheet 2 that prevents intrusion of rainwater and condensed water into the indoor side and a lath material 3 that is a core material of the wet exterior material 15. It is configured.

  The waterproof sheet 2 includes, for example, asphalt felt 21 in which paper (base paper) is soaked with asphalt, and a nonwoven fabric layer 22 provided on the surface of the asphalt felt 21 on the outdoor side (see FIG. 4). The nonwoven fabric layer 22 has a function of improving adhesion to the wet exterior material 15 and improving adhesion to the adhesive that joins the lath material 3. The upper end side 23 of the waterproof sheet 2 extends upward from the upper end side 33 of the lath material 3.

  The lath material 3 is a mesh-shaped (mesh) steel member made of expanded metal. The lath material 3 includes a plurality of curved portions 31 that are curved in an arc shape, and a joint portion 32 that is provided between adjacent curved portions 31.

  The curved portion 31 is curved like a convex shape so as to be convex toward the outdoor side in a cross-sectional view, and extends in the horizontal direction. The distance between the top of the curved portion 31 and the waterproof sheet 2 is about ½ of the layer thickness of the wet exterior material 15. As a result, when the wet exterior material 15 is applied, the top of the curved portion 31 is arranged at the approximate center in the thickness direction of the wet exterior material 15. Since the curved portion 31 is supported by the arch action, it is difficult to be crushed when the wet exterior material 15 is applied with a plastering iron. A lower end side 34 (the lowermost curved portion 31) of the lath material 3 extends below the lower end side 24 of the waterproof sheet 2.

  The joining part 32 is a valley-like part formed between the adjacent curved parts 31, 31, and is joined to the waterproof sheet 2 with an adhesive 5 (see FIGS. 3 and 4). The joint portion 32 extends in the horizontal direction and has a function of supporting the waterproof sheet 2 so that the waterproof sheet 2 does not bend and block the air passage 16 between the adjacent trunk edges 14, 14. Have.

FIG. 3 is an enlarged front view showing a portion A of FIG. 4 is a cross-sectional view taken along the line II of FIG.
As shown in FIGS. 3 and 4, the width dimension t <b> 2 of the wire material (strand) 32 a constituting the mesh of the joint portion 32 is formed larger than the width dimension t <b> 1 of the wire material 31 a constituting the mesh of the bending portion 31. (T2> t1). Thereby, since the rigidity of the junction part 32 becomes high, the support force of the waterproof sheet 2 increases, and the waterproof sheet 2 becomes difficult to bend in the ventilation path 16.
In addition, as shown in FIG. 4, the wire 32a which comprises the mesh | network of the junction part 32 will be in the state (standing state) in which the width direction of the wire 32a inclined with respect to the waterproof sheet 2 in the cross-sectional view state. Yes. Thereby, the rigidity of the out-of-plane direction of the junction part 32 can be improved by enlarging the width dimension t2 of the wire 32a.

FIGS. 5A and 5B are explanatory diagrams for explaining a method for manufacturing a lath material, where FIG. 5A shows a state in which a curved portion is manufactured, and FIG. 5B shows a state in which a joint portion is manufactured. .
As shown in FIGS. 5A and 5B, the lath material 3 is cut in a zigzag manner with the upper blade 43 and the lower blade 44 while feeding the expanded metal original plate 41 by the roller 42 by a predetermined size. Manufactured by pushing down. In addition, although illustration is abbreviate | omitted, the unevenness | corrugation is formed in the lower surface 43a of the upper blade 43, and it can form a cut | interval in zigzag form by shifting | deviating to a horizontal direction for every cutting operation.

Then, as shown in FIG. 5A, the bending portion 31 is formed by setting the feed amount of the original plate 41 to t1. Further, as shown in FIG. 5B, the joining portion 32 is formed by setting the feed amount of the original plate 41 to t2 (t2> t1). As described above, the lath material 3 can be easily manufactured by simply adjusting the feed amount of the original plate 41 without changing the conventional manufacturing equipment.
Thereafter, the lath material 3 is completed by imparting a curvature to the bending portion 31 using a mold or a roller (not shown).

FIG. 6 is a vertical sectional view of a joint portion of a lath with a waterproof sheet.
As shown in FIG. 6, in the lath 1 with waterproof sheet, the waterproof sheet 2 of the upper lath 1A with the waterproof sheet is formed of the lower lath 1B with the waterproof sheet so that water does not enter the indoor side from the joint portion. It is overlaid so as to be on the outdoor side of the waterproof sheet 2.
At this time, the lower end side 34 of the lath material 3 extends from the lower end side 24 of the waterproof sheet 2, and the upper end side 23 of the waterproof sheet 2 extends from the upper end side 33 of the lath material 3. Therefore, the overlapping position of the waterproof sheet 2 and the overlapping position of the lath material 3 are shifted up and down.

More specifically, the upper end side 33 of the lath material 3 of the lath 1B with the waterproof sheet on the lower side is not joined to the waterproof sheet 2. Accordingly, the lower end side 34 of the lath material 3 of the lath 1A with the upper waterproof sheet is inserted between the upper end side 33 of the lath material 3 of the lower lath 1B with the waterproof sheet and the waterproof sheet 2, and at the same time, the upper waterproofing is performed. The lower end side 24 of the waterproof sheet 2 of the lath with sheet 1A can be overlapped with the outdoor side of the upper end side 23 of the waterproof sheet 2 of the lath 1B with sheet of waterproof sheet.
Accordingly, the waterproof sheets 2 can be brought into close contact with each other, and the crack of the wet exterior material 15 can be suppressed by overlapping the lath material 3, and the joint portion of the lath 1 with the waterproof sheet can be reliably reinforced. .
Moreover, since the overlapping position of the waterproof sheet 2 and the overlapping position of the lath material 3 are shifted up and down, it is easy to confirm the construction state and the construction work is also simplified.

  The lath 1 with waterproof sheet according to the present embodiment is basically configured as described above. Next, the operation of the lath 1 with waterproof sheet will be described.

According to the lath 1 with the waterproof sheet according to the present embodiment, the width dimension t2 of the wire 32a constituting the mesh of the joint portion 32 joined to the waterproof sheet 2 in the lath material 3 constitutes the mesh of the curved portion 31. Since the wire 31a is formed larger than the width t1 of the wire 31a, the rigidity of the joint portion 32 is increased. Therefore, since the waterproof sheet 2 can be supported by the joint portion 32 having high rigidity, the support force of the waterproof sheet 2 is improved. As a result, the waterproof sheet 2 becomes difficult to bend when the wet exterior material 15 is applied, and the air passage 16 can be secured.
In addition, since the rigidity of the curved portion 31 is increased by the arch action, it is possible to maintain the state separated from the waterproof sheet 2 without increasing the width dimension t1 of the wire 31a constituting the mesh of the curved portion 31. The weight of the lath material 3 can be reduced.

  Moreover, since the lath material 3 and the waterproof sheet 2 are integrated through the joint portion 32, the waterproof sheet lath 1 can be constituted by two members. Further, if the lath material 3 is made of expanded metal, the width dimension (t1) of the wire rods 31a and 32a constituting the mesh is changed by changing the interval between the cuts at the stage of making a cut in the original plate 41 which is the material of the expanded metal. , T2) can be easily adjusted. Therefore, it is possible to simplify the manufacturing operation while reducing the number of parts.

Moreover, according to the lath 1 with the waterproof sheet according to the present embodiment, the lower end side 34 of the lath material 3 extends from the lower end side 24 of the waterproof sheet 2, and the upper end side 23 of the waterproof sheet 2 is the lath. Since it extends from the upper end side 33 of the material 3, the waterproof sheets 2 can be brought into close contact with each other, and cracking of the wet exterior material 15 is suppressed by overlapping the lath material 3, so that the lath 1 with waterproof sheet is provided. The joint part can be reliably reinforced.
Moreover, since the overlapping position of the waterproof sheet 2 and the overlapping position of the lath material 3 are shifted up and down, it is easy to confirm the construction state and the construction work is also simplified.

  Moreover, according to the lath 1 with the waterproof sheet according to the present embodiment, the nonwoven fabric layer 22 is provided on the outdoor surface of the waterproof sheet 2, so that the wet exterior material 15 such as cement mortar and the waterproof sheet 2 are in close contact with each other. Can increase the sex. Further, for example, when the waterproof sheet 2 and the lath material 3 are bonded with the adhesive 5, the bonding strength of the adhesive 5 can be improved by the adhesive 5 soaking into the nonwoven fabric layer 22.

  As mentioned above, although embodiment of this invention was described in detail with reference to drawings, this invention is not limited to this embodiment, In the range which does not deviate from the main point of this invention, it can change suitably.

  For example, in the present embodiment, the lath material 3 and the waterproof sheet 2 are joined with the adhesive 5, but the joining method is not limited to this, but joined by other methods (for example, stitching). Also good.

  In the present embodiment, the lower end side 34 of the lath member 3 of the upper lath 1A lath 1A is inserted into the indoor side of the upper end 33 of the lath member 3 of the lower lath 1B. However, the present invention is not limited to this, and the lower end side 34 of the lath member 3 of the upper lath 1A with the waterproof sheet is placed on the outdoor side of the upper end side 33 of the lath member 3 of the lower lath 1B with the waterproof sheet. May be.

DESCRIPTION OF SYMBOLS 10 Outer wall 11 Wall frame 12 Plywood for structure 13 Moisture permeable waterproof sheet 14 Trunk edge 15 Wet exterior material 16 Ventilation path 1 Lath with waterproof sheet 2 Waterproof sheet 21 Asphalt felt 22 Non-woven fabric layer 3 Lath material 31 Curved portion 31a Wire material 32 Joint portion 32a Wire material t1 Width dimension t2 Width dimension

Claims (3)

A lath with a waterproof sheet in which a waterproof sheet is attached to the indoor side of a mesh-shaped lath material,
The lath material has a plurality of curved portions that are curved so as to be separated from the waterproof sheet, and a plurality of joint portions that are provided between the adjacent curved portions and are joined to the waterproof sheet,
A lath with a waterproof sheet, wherein the wire constituting the mesh of the joint has a larger width dimension than the wire constituting the mesh of the curved portion.   One end side of the lath material is extended from one end side of the waterproof sheet, and the other end side of the waterproof sheet is extended from the other end side of the lath material. The lath with a waterproof sheet according to claim 1.   The lath with a waterproof sheet according to claim 1 or 2, wherein a nonwoven fabric is provided on a surface of the waterproof sheet on an outdoor side.

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