JP4969857B2 - Breathable spacer - Google Patents

Description

  The present invention relates to a breathable spacer that can be adjusted in the width direction without impairing rigidity, has high compressive strength in the thickness direction, and is not bulky during storage and transportation.

  In order to improve energy efficiency in summer and air conditioning in winter, wooden frame walls, roofs, floors, and other structural enclosures, especially wall structures, were introduced. However, along with the widespread use of highly airtight and highly insulated houses, dew condensation in the walls of the houses has caused health problems such as corrosion of wood and steel materials in the structure and generation of mold.

  FIG. 4 shows one of the conventional examples as a countermeasure against the above-mentioned dew condensation in the wall, and is a structure conventionally known in Japanese Patent No. 3400766 (Patent Document 1) devised by the present applicant. In this figure, an air-permeable layer is secured by inserting an air-permeable spacer 100 between the exterior material of the roof or the outer wall or between the exterior base material and the heat insulating material. As an assembling method, both end portions of a breathable plate-like member formed to a predetermined size are folded at two locations 101, 101a, 102, and 102a, respectively. The strips 103 and 103a can be formed. And the breathable spacer structure which ensures a ventilation layer is comprised by inserting between the base plate 10 and the heat insulating material 11, making the said mountain-shaped protruding item | line parts 103 and 103a contact the rafter 9.

  As a conventional example different from the above, polycarbonate is used, and a strip shape is formed. A large number of communication holes are provided in the inner width direction, and the corner communication holes are opened to the outside at both end faces. There has been known a method of providing a breathable spacer for ventilating the inside of a wall so that the communicating hole is in a vertical direction between the conductive spacer and the outer wall material and the heat insulating material. (Patent Document 2)

  In addition, as a ventilation breathable spacer to be inserted between a heat insulating outer structure exterior material or an exterior base material and a heat insulating material, a plurality of belt-shaped cardboards are used as vertical members and one or more ventilation holes are provided inside. A plurality of corrugated cardboards are used as horizontal members, and the vertical members and the horizontal members are engaged with each other in a lattice shape, and adjacent cells surrounded by each side of the lattice insert a breathable spacer. There is known a breathable spacer that is at least breathable in a direction corresponding to the vertical direction of the outer skin to be formed. (Patent Document 3)

Furthermore, a flat plate-shaped high-density glass wool (30 kg / m ³ or more) glass wool is used as a heat insulating material in the wall of the building, and V-shaped cuts are formed at predetermined inner positions at both ends, and the cuts are formed. A technique is known in which a vent layer is formed in the recess by bending the outer piece formed inward to form a recess. (Patent Document 4)

Furthermore, for the purpose of reinforcing the central portion of the ventilation layer, the inorganic fiber mat is provided between the roof base material and the heat insulating material by directing the convex forming member to the roof base material and fitting the heat insulating material between the rafters. A board-shaped heat insulating member composed of a heat insulating material in which a convex portion forming member is bonded and integrated so as to form a convex portion for forming a ventilation layer, and the convex portion forming member is used as a roof base material The heat insulating layer is formed by inserting a heat insulating material between the rafters so that a ventilation layer of a size determined by the height of the convex forming member is formed between the roof base material and the heat insulating member, and a ventilation layer is formed on one side. There is known a heat insulating material having a structure that forms a film. (Patent Document 5)
Japanese Patent No. 3400766 Japanese Patent Laid-Open No. 06-033524 JP 2001-115571 A JP-A-8-120801 JP 2003-041675 A

  The breathable spacer according to Patent Document 1 has a structure in which both end portions are supported by spring-shaped mountain-shaped ridges, but since there is no support member for the central portion, the central portion is compressed by a heat insulating material. And there is a possibility that a sufficient ventilation layer area cannot be secured.

  In the breathable spacer for ventilating in the wall according to Patent Document 2, polycarbonate, which is an optimum material, has characteristics that it is easy to make a hole when nailing and cracks do not propagate, and can be cut with a cutter. Although it has a strong bending force and is difficult to be deformed, at least pre-processing of the opening is required.

  The breathable spacer according to Patent Document 3 can be folded, so there is no need to assemble it at the site. However, even if it is assembled at the factory, it takes assembling man-hours and is used for a space smaller than the assembled size. It ’s hard.

In the glass wool for heat insulation in a wall which can ensure the air permeability which concerns on patent document 4, apart from the glass wool of normal density (24 kg / m < ³ > in an Example) used as a heat insulating material, it is high density (30 kg / m < ³ > or more). In the embodiment, glass wool of 32 kg / m ³ ) must be prepared, and processing is necessary, so that it is difficult to respond flexibly on site.

  In the heat insulating material according to Patent Document 5, the material of the convex portion forming member fitted between the roof and the heat insulating member is a member having a higher density than that of the heat insulating member, but the vent layer does not have the convex portion forming member. Since the heat insulating member is exposed, there is a possibility that when the heat insulating material is fitted, the heat insulating member is pushed in the roof direction and a sufficient ventilation layer is not secured.

  The present invention has been devised by improving Patent No. 3400766 (Patent Document 1) proposed by the present applicant in order to solve the above-mentioned problems, and has a ventilation structure that forms a three-dimensional shape by bending a flat corrugated cardboard. In the spacer, at least three parallel perforations are formed on the flat corrugated cardboard, and the three parallel perforations constituting each group are given strength to bend easily. I tried to be.

  Further, in a breathable spacer having a three-dimensional shape by bending a flat corrugated cardboard, a perforation line is formed at the center of the flat corrugated cardboard along the shape of a pair of small pieces, and one small piece has an engaging protrusion. The other small piece is provided with a recess for engagement, and the perforation line of the part facing the protrusion part for engagement and the recess for engagement is set to be more difficult to separate from the perforation line of the other part.

  Further, in the air permeable spacer that is formed into a three-dimensional shape by bending the flat cardboard, at least three parallel perforation lines are formed on the flat cardboard, one pair on the left and right, and three parallel lines constituting each set. The perforation line has a strength to bend easily, and a perforation line is formed along the shape of a pair of small pieces at the center of the flat corrugated cardboard. One of the small pieces has an engaging protrusion. Each of the small pieces is provided with an engaging recess, and the perforation line of the engaging projection and the part facing the engaging recess is set to be more difficult to separate than the other part of the perforation line.

  In the breathable spacer according to the present invention, by setting the perforation that is easy to crease and the perforation that is difficult to break, the interval setting of the mountain-shaped ridges can be easily changed, and further, the rafter is composed of two pieces. Even in such a case, the interval between the ridge-shaped ridge portions can be adjusted, and therefore it is not necessary to prepare breathable spacers having different intervals between the ridge-shaped ridge portions. In addition, a perforation line having a different degree of difficulty of cutting along the shape of a pair of small pieces is formed at the center of the flat corrugated cardboard, and an engaging protrusion is provided on one small piece, and an engaging recess is provided on the other small piece. Since the perforation lines of the portions facing the engaging projections and the engaging recesses are set to be more difficult to separate than the perforation lines of other portions, the central mountain-shaped convex portion can be easily formed at the site. In addition to the central portion, it is possible to provide a breathable spacer excellent in compressive strength in the thickness direction at an economical cost.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings. In the following description, components having the same function are denoted by the same reference numerals, and repeated description thereof is omitted.

  Fig.1 (a) is a perspective view of the corrugated cardboard 1 before a process, FIG.1 (b) is a front view similarly. The sections S1 to S3 and S1a to S3a are substantially rectangular, and the widths W1 to W3 and W1a to W3a may be the same or different, but the section widths W3 and W3a are close to the rafter width, for example, Preferably, the dimension is between 45 mm and 38 mm.

  On the other hand, the direction of the core 1a of the cardboard 1 is orthogonal to the parallel perforations R1 to R3 and R1a to R3a. For example, when sandwiched between rafters, the core of the corrugated cardboard 1 is in relation to the rafters. It becomes a right angle. The cardboard 1 can be a cardboard 1 having a single core 1a. By using the corrugated cardboard 1 as the air permeability ensuring member, even if moisture is mixed into the heat insulating material, the moisture is discharged through the corrugated cardboard 1 to the air-permeable layer.

  In the front view of the corrugated cardboard 1 before processing shown in FIG. 1 (b), the corrugated board 1 is easily separable at the center of the corrugated cardboard 1 except for the perforated lines 3 and 3a which are difficult to cut off. Two polygons 2, 2a are formed. The perforations that are easy to separate are cut off, and the polygons 2 and 2a are raised by the perforated lines 3 and 3a that are difficult to cut off. By engaging the portion 6, the protruding portion 8 is formed as illustrated in FIGS. 2A and 2B described later.

  In addition, the perforations 3 and 3a that are difficult to cut have a perforation structure that is more difficult to cut than the perforations that are easy to cut off. This prevents the perforation 3, 3a that is difficult to cut off. As a method for forming the perforations 3 and 3a, which are difficult to cut, for example, it is conceivable to cut perforations at a depth of 1/3 to 1/2 of the cardboard thickness on the surface opposite to the folded side. . In addition, when it is difficult to adjust the depth of the perforation cut, a method of making the perforation difficult to break by increasing the pitch of the perforation may be considered.

  As an example of the assembling method, two typical methods are conceivable. The first assembly method is an assembly method in a configuration in which rafters are arranged one by one. In this case, first, the sections S2 and S2a are lifted with the middle parallel perforations R2 and R2a as a boundary, and the sections S1 and S1a are folded down with the outermost parallel perforations R1 and R1a as a boundary. A method for forming the ridges is conceivable. An assembly example by this method is shown in FIG.

  The second assembling method is an assembling method when the rafter interval is narrow with double rafters, such as two houses. In this case, the sections S3 and S3a are first lifted with the innermost parallel perforations R3 and R3a as the boundary, and the sections S2 and S2a and the sections S1 and S1 with the middle parallel perforations R2 and R2a as the boundaries. A method of forming the mountain-shaped ridges by collectively folding S1a is conceivable. An assembly example by this method is shown in FIG.

  In the two folding methods, since the perforations R3 and R3a are not bent in FIG. 2A, it is preferable to have a perforation structure that is more difficult to bend than the other perforations R1, R1a, R2, and R2a. In this case, for the perforations R3 and R3a, it is not necessary to cut all the depth in the thickness direction of the corrugated board. For example, 1/3 to 1 of the corrugated board thickness is formed on the surface opposite to the side where the mountain-shaped convex portions are formed. It is conceivable to make a cut at a depth of / 2. In addition, when it is difficult to adjust the depth of the perforation cut, a method of making the perforation difficult to break by increasing the pitch of the perforation may be considered.

  From the factory to the site, as shown in Fig. 1 (a) and (b), if the corrugated cardboard is not assembled, it is stacked in a flat state, and if a plurality of cardboards are bundled and transported, the volume during transportation can be reduced, so transportation costs Can be suppressed.

  In the above, the small piece 2 having the locking concave portion and the small piece 2a having the locking convex portion are substantially quadrangular, but this shape is not limited to a quadrilateral, and may be other polygons, for example, a triangle, or a substantially circular shape. It is also possible to do.

  In the above description, the parallel perforations R1 to R3 and R1a to R3a are in a parallel relationship, but are not necessarily parallel. Further, the interval between the parallel perforations R1 to R3, R1a to R3a, 3 and the height of the protruding portion 8 may be arbitrary, and the number of the mountain-shaped convex portions 8 is not limited to one, but two It may be above.

  Further, in the above, the perforation is used as means for enabling the strip folding, but this is not limited to the perforation, and if the folding position can be easily determined and the folding operation can be easily performed, a press or Ironing may be used.

  FIGS. 2A and 2B show an assembly example of the cardboard. As described above, the breathable spacer according to the present invention according to the present invention is folded at two locations along the long side direction of the corrugated cardboard 1 having rigidity and breathability suitable for the use formed in a predetermined dimension, It is a breathable spacer formed by forming the ridges 7 and 7a at both ends, and has a feature that can be configured in either of FIGS. 2 (a) and 2 (b) depending on the application.

  The breathable spacer shown in FIG. 2 (a) is a perspective view at the time of wide setting, and both side surfaces of the folded portion are substantially the same size. The folded portion has a spring property, and the distance L1 between the ridge lines when the width is set is variable.

  FIG. 2B is a perspective view when the width is set, and the area of the outer portion of the folded portion is set larger than the area of the inner portion of the folded portion, for example, approximately twice the area ratio. It is possible. The folded portion also has a spring property, and the distance L2 between the ridge lines when the width is set is variable.

  Further, in the breathable spacer of FIGS. 2 (a) and 2 (b), a projection 8 is provided at the center, and, as will be described later, during construction, for example, between a field board and a heat insulating material. It is possible to prevent the central portion of the breathable spacer from being depressed when sandwiched.

  FIGS. 3A and 3B are construction examples using the breathable spacer of the present invention. FIG. 3 (a) shows a chamber in which a breathable spacer set wide for a rafter by the first assembling method is fitted between the roof base plate 10 and the rafters 9 and 9, and is further in contact with the breathable spacer. It is sectional drawing when it fills from the inner side. In this state, the air-permeable spacer is restrained to the left and right by the spring property of the mountain-shaped protrusions 7 and 7a in the width direction. Further, the breathable spacer is pushed by the elasticity of the heat insulating material 11 from the indoor side toward the base plate 10 side, but the breathable layer is crushed by the mountain-shaped ridges 7, 7 a and the protrusions 8. It is structured to prevent.

  FIG. 3B shows that the breathable spacer narrowed for the rafters by the second assembling method is fitted between the roof base plate 10 and the rafters 9 and 9 so as to contact the breathable spacers. It is sectional drawing when it fills from the indoor side. In this state, the air-permeable spacer is restrained to the left and right by the spring property of the mountain-shaped protrusions 7 and 7a in the width direction. In addition, the breathable spacer is pressed by the elasticity of the heat insulating material 11 from the indoor side toward the base plate 10 side, but the corrugated cardboard 1 is supported by the mountain-shaped protrusions 7 and 7a and the protrusions 8, The ventilation layer formed by the base plate 10 and the breathable spacer is prevented from being crushed.

  The breathable spacer of the present invention can be transported in a flat plate shape before assembly, so that the transportation cost can be reduced, and after assembly, even if it is suppressed from above with a heat insulating material, the protrusion provided in the central part of the cardboard, Even when a heat insulating material is inserted, the ventilation layer is not blocked and the assembly is easy, so the time required for the ventilation layer construction can be greatly reduced.

It is a figure before assembly of corrugated cardboard used for a breathable spacer, (a) is a perspective view, (b) is a front view BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembled perspective view of a breathable spacer according to the present invention, where (a) is a perspective view of a wide setting, and (b) is a perspective view of a narrow setting. FIG. 2 is a schematic cross-sectional view of the breathable spacer shown in FIG. 1 fitted between the rafters, in which (a) shows a wide setting and (b) shows a state in which a heat insulating material is fitted on a narrowly set breathable spacer. (A) is a front view of a maximum width corrugated cardboard fitted between rafters, (b) is a front view of a corrugated cardboard folded on one side and fitted between rafters, and (c) is fitted between narrow rafters. Figure showing the front view of the corrugated cardboard

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Corrugated cardboard, 2 ... Small piece with latching recessed part, 2a ... Small piece with latching convex part 3, 3a ... Perforation which is difficult to cut, 4 ... Corrugated cardboard, 5 ... Small piece tip recessed part, 6 ... Small piece tip convex part , 7 ... mountain-shaped ridges, 8 ... projections, 9 ... rafters, 10 ... field plate, 11 ... heat insulating material, 100 ... air permeability ensuring member, 101 ... mountain-like convex parts, 101a ... mountain-like convex parts , 102, 102a ... parallel perforations, 103, 103a ... mountain-shaped ridges, L1 ... distance between ridgelines when setting wide, L2 ... distance between ridgelines when setting narrow, R1-R2 ... perforations that are easy to turn back Eyes, R1a to R2a ... perforation that is easy to fold, R3 ... perforation that is difficult to fold, R3a ... perforation that is difficult to fold, S1 to S3 ... section, S1a to S3a ... section, W1 to W3 ... section width.

Claims (2)

  In a breathable spacer having a three-dimensional shape by bending a flat cardboard, a perforation line is formed at the center of the flat cardboard along the shape of a pair of small pieces, and one of the small pieces has an engaging protrusion. The other small piece is provided with a recess for engagement, and the perforation line of the part facing the protrusion part for engagement and the recess for engagement is set to be more difficult to separate from the perforation line of the other part. Spacer. In breathable spacers forming a three-dimensional shape by bending a flat cardboard, the flat plate-like cardboard formed One not a least three parallel lines of perforation of the right and left pair, a parallel three constituting each set The perforation line is made to be easy to bend, and a perforation line is formed along the shape of a pair of small pieces at the center of the flat corrugated cardboard. One small piece has an engaging protrusion on the other side. A breathable spacer, wherein the small piece is provided with an engaging recess, and the perforation line of the engaging projection and the part facing the engaging recess is set to be more difficult to separate from the perforation line of the other part.