JP2012229587A - Exterior wall member fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exterior wall member fixing structure capable of suppressing the fall-off of exterior wall members in a fire and of increasing its fire resisting performance.SOLUTION: The exterior wall member fixing structure is formed by fixing exterior wall members 1 to a wooden column 3 with machine screws 2. The machine screws 2 are driven into the column 3 up to a depth reaching a non-defective portion 4 of the column 3 which remains when heated for 60 minutes according to an ISO standard heating curve.

Description

  The present invention relates to an outer wall material fixing structure.

  Conventionally, in a building such as a wooden house, an outer wall panel is fixed as follows. That is, after fixing a ventilation cylinder edge formed of a wooden flat plate to a pillar formed of cedar wood with a nail, an outer wall panel is fixed to the ventilation cylinder edge with a nail or the like (for example, Patent Document 1). reference).

JP 2004-270391 A

  However, in the conventional fixing method of the outer wall panel, if a part of the pillar is lost due to combustion or carbonization in the event of a fire, there is a possibility that the outer wall panel may fall off, such as a nail that fixes the outer wall panel falls off. was there.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a fixing structure for an outer wall material that can prevent the outer wall material from falling off during a fire and can improve fire resistance.

  The outer wall material fixing structure according to the present invention is an outer wall material fixing structure formed by fixing an outer wall material to a wooden pillar using a screw, and remains even if heated for 60 minutes in accordance with an ISO standard heating curve. The screw is driven into the pillar to a depth that reaches a non-defect portion of the pillar.

  In the fixing structure of the outer wall material, it is preferable that a plurality of the outer wall materials are arranged to face each other, and a plate material is interposed between the butted portion of the outer wall material and the column.

  In the fixing structure of the outer wall member, it is preferable that a fastener is fixed to the pillar using the screw, and the outer wall member is attached and fixed to the fastener.

  According to the present invention, even if a part of the pillar is lost due to combustion or carbonization in the event of a fire, the screws fixing the outer wall material directly or indirectly to the pillar are driven into the non-defect portion of the pillar. As a result, the falling off of the outer wall material can be suppressed and the fire resistance can be improved.

It shows an example of the fixing structure of the outer wall material according to the present invention, (a) is a horizontal sectional view, (b) is a perspective view, (c) is a perspective view of the lowermost part of a pillar. It is a horizontal sectional view which shows another example of the fixing structure of the outer wall material which concerns on this invention. (A) is a horizontal sectional view which shows an example of a faceplate material, (b) is a horizontal sectional view which shows an example of the fixing structure of the outer wall material formed using the eyeplate material of (a). (A) is a horizontal sectional view showing another example of the plate material, (b) is a horizontal sectional view showing an example of the fixing structure of the outer wall material formed using the plate material of (a). (A) is a horizontal sectional view showing another example of the plate material, (b) is a horizontal sectional view showing an example of the fixing structure of the outer wall material formed using the plate material of (a). (A) is a horizontal sectional view showing another example of the plate material, (b) is a horizontal sectional view showing an example of the fixing structure of the outer wall material formed using the plate material of (a). It is a graph which shows the ISO standard heating curve in a fireproof performance test. It is a horizontal sectional view showing an example of a pillar after a fireproof performance test. It is a front view which shows an example of a test body. (A) is a graph which shows each layer average temperature of an Example, (b) is a graph which shows each part maximum temperature of an Example. (A) is a graph which shows each layer average temperature of a comparative example, (b) is a graph which shows each part maximum temperature of a comparative example.

  Embodiments of the present invention will be described below.

  FIG. 1 shows an example of a fixing structure of an outer wall material according to the present invention, which is formed by fixing an outer wall material 1 to a wooden column 3 using screws 2. In forming the fixing structure of the outer wall material 1, the eye plate material 6 and the fastener 7 are also used. In the present invention, the outer wall material 1 is fixed to the column 3 using the screws 2 in the case where the outer wall material 1 is indirectly fixed to the column 3 using the fastener 7 as shown in FIG. Thus, both of the case where the screw 2 is driven in from the outdoor surface of the outer wall material 1 and the outer wall material 1 is directly fixed to the column 3 are included.

  First, the outer wall material 1, the column 3, the eye plate material 6, and the fastener 7 will be described.

  As the outer wall material 1, a ceramic material made mainly of cement formed in a substantially flat rectangular shape can be used. A real part 8 projects from the indoor side of the upper end surface of the outer wall material 1. A cover (not shown) is provided on the outdoor side of the lower end surface of the outer wall material 1 and a groove (not shown) is provided on the indoor side.

  As the pillar 3, cedar wood having a rectangular cross section of 76 to 165 mm × 84 to 165 mm can be used.

  As the plate material 6, as shown in FIG. 3 (a) and FIG. 6 (a), a flat plate-type joiner formed by providing a plurality of ribs 10 having a substantially V-shaped cross section in the long flat plate portion 9 in the longitudinal direction, As shown in FIG. 4A and FIG. 5A, it is possible to use a hat-type joiner or the like formed by providing one or more protrusions 11 having a substantially U-shaped cross section in the long flat plate portion 9 in the longitudinal direction. it can. These plate members 6 can be formed by bending a steel plate, an aluminum plate or the like. The width of the eye plate material 6 is about 30 to 100 mm.

  As the fastener 7, one formed by providing the fixed piece 12, the upward locking piece 13, and the downward locking piece 14 can be used. The fastener 7 (starter bracket 15) fixed to the lowermost part of the pillar 3 is formed by providing the fixed piece 12 and the upward locking piece 13 as shown in FIG. I don't have it.

  Next, a method for forming the fixing structure of the outer wall material as shown in FIG. 1 using the outer wall material 1, the pillar 3, the eye plate material 6 and the fastener 7 will be described.

  First, the waterproof paper 16 is stretched on the outdoor side of the pillar 3 erected at a predetermined interval, and the wooden long vertical trunk edge 17 is installed on the outdoor surface of the pillar 3 through the waterproof paper 16. Although not shown, rock wool (RW) is installed as a heat insulating material between the pillars 3 adjacent to each other on the indoor side from the waterproof paper 16.

  Next, the eye plate material 6 is fastened to the outdoor surface of the vertical trunk edge 17. This fastening can be performed by nail fastening with a pitch of 300 to 1000 mm in the vertical direction, but the fastener 7 (including the starter fitting 15) is stacked and pressed on the eye plate material 6 as will be described later without using the nail fastening. It can also be done. In the following, a hat-type joiner formed by providing one protrusion 11 having a substantially U-shaped cross section in the longitudinal direction at the substantially central portion of the long flat plate portion 9 as the eye plate material 6 as shown in FIG. Although the example used is demonstrated, this invention is not limited to this.

  Next, as shown in FIG. 1C, starter fittings 15 are stacked on both sides of the eye plate material 6 at the lowermost part of the pillar 3, and these starter fittings 15 are fixed to the pillar 3 using screws 2. At this time, the dimension (starting dimension) of the overlapping portion between the eye plate material 6 and the starter fitting 15 is about 10 to 30 mm. Further, the screw 2 is used to fix the fastener 7 other than the starter fitting 15 to the column 3 and the relationship between the screw 2 and the column 3 is important in the present invention. This relationship will be described later. Note that the screw 2 may or may not penetrate the eye plate material 6.

  Then, the some outer wall material 1 is faced | matched and arrange | positioned. The abutting portion 5 formed at this time may be formed so that the opposing side end surfaces of the adjacent outer wall materials 1 are in contact with each other, but in FIG. 6 ridges 11 are sandwiched. In any case, since the eye plate material 6 is interposed between the abutting portion 5 of the outer wall material 1 and the column 3, even if a flame enters from the outside through the abutting portion 5 of the outer wall material 1, the eye plate material The flame barrier property of 6 can suppress or delay the burning and carbonization of the column 3. Then, the upward locking piece 13 of the starter fitting 15 is fitted into the groove on the lower end surface of the outer wall member 1, and the outer wall member 1 is attached and temporarily fixed to the starter fitting 15.

  Next, the downward locking pieces 14 of the fasteners 7 are fitted to the real part 8 of the upper end surface of each outer wall member 1 temporarily fixed as described above, and these fasteners 7 are attached to both sides of the eye plate material 6. Overlay on. At this time, the dimension of the overlapping portion between the eye plate material 6 and the fastener 7 is about 10 to 30 mm. Then, by fixing these fasteners 7 to the pillars 3 using screws 2, the outer wall material 1 is attached and fixed to the fasteners 7. By repeating such fixing of the outer wall material 1 from the bottom to the top as necessary, a fixing structure of the outer wall material 1 can be formed.

  3 (a), 4 (a), 5 (a), and 6 (a) are used as the face plate material 6, and the fixing structure of the outer wall material 1 is shown in FIGS. b), FIG. 5B and FIG. 6B, the illustration of the pillar 3 and the like is omitted.

Here, the relationship between the screw 2 and the pillar 3 will be described. In the present invention, before actually forming the fixing structure of the outer wall material 1 in a building such as a wooden house, a test body 18 as shown in FIG. 9 is manufactured using the same material, and this test body 18 is used using a heating furnace. The fire resistance test is performed by heating for 60 minutes according to the ISO standard heating curve. As shown in FIG. 7, the ISO standard heating curve is expressed by an equation: T = 345log ₁₀ (8t + 1) +20 (T: average furnace temperature (° C.), t: elapsed time of test (minutes)). When this fire resistance performance test is performed, it is confirmed that corner portions of the outdoor surface of the column 3 of the test body 18 are lost due to combustion or carbonization and other portions remain as shown in FIG. The upper part of FIG. 8 is the outdoor side, and the lower part is the indoor side. As described above, since the defective portion 19 and the non-defective portion 4 of the column can be grasped in advance by this fire resistance performance test, the actual fixing structure of the outer wall material 1 can be heated for 60 minutes according to the ISO standard heating curve. The screw 2 is driven into the pillar 3 to a depth that reaches the non-defect portion 4 of the remaining pillar 3. In the present invention, since the screw 2 and the pillar 3 have such a relationship, even if a part of the pillar 3 is lost due to combustion or carbonization during a fire, the outer wall material 1 is directly or indirectly pillared. The screw 2 fixed to 3 is driven into the non-deficient portion 4 of the pillar 3, so that the outer wall material 1 can be prevented from falling off and the fire resistance can be improved.

  As shown in FIG. 8, the central portion of the pillar 3 is less likely to be lost on the outdoor surface, so that a short screw 2 can be used. For example, when a cedar material having a rectangular cross section of 105 mm × 105 mm is used as the pillar 3, the relationship between the distance D1 from the center and the defect dimension D2 is as follows.

  From Table 1, when screw 2 is driven into a location where D1 = 10 mm, 20 mm, and 30 mm, screw 2 having a length of more than 8.5 mm, more than 11.0 mm, and more than 17.5 mm is used. It is considered that the screw 2 does not fall out even if a part of the pillar 3 is lost during a fire. In addition, since the butt | matching part 5 is normally formed in the location of D1 = 0mm, the bis | screw 2 is not drive | injected into this position.

  In the present invention, the outer wall material 1 can be directly or indirectly fixed to the column 3, but as shown in FIG. 1 as compared to the case where the outer wall material 1 is directly fixed to the column 3 as shown in FIG. 2. In the case where the outer wall material 1 is indirectly fixed to the column 3 using the fastener 7, it is possible to easily confirm the place where the screw 2 is to be driven. That is, the place where the screw 2 is to be driven is a specific place that is difficult to be lost on the outdoor surface of the pillar 3, but in the outer wall material 1 having a larger area than the fastener 7, the above place is greatly increased in the vertical direction. Since it is hidden, it becomes difficult to drive in the screw 2 aiming at the above-mentioned part.

  Hereinafter, the present invention will be specifically described by way of examples.

(Example)
As the outer wall material 1, a ceramic material made mainly of cement formed in a substantially flat rectangular shape was used. A real part 8 projects from the indoor side of the upper end surface of the outer wall material 1. A cover portion protrudes from the outdoor side of the lower end surface of the outer wall material 1, and a groove portion is recessed from the indoor side.

  As the pillar 3, cedar wood having a rectangular cross section of 105 mm × 105 mm was used.

  A flat plate type joiner formed by providing two ribs 10 having a substantially V-shaped cross section in the long flat plate portion 9 in the longitudinal direction as shown in FIG. The eye plate material 6 is formed by bending a steel plate. The width of the eye plate material 6 is 66 mm.

  As the fastener 7, one formed by providing a fixing piece 12, an upward locking piece 13 and a downward locking piece 14 was used.

  And the test body 18 in which the fixing structure of the outer wall material was formed as described below was manufactured using the outer wall material 1, the pillar 3, the plate member 6 and the fastener 7.

  First, a wooden long vertical trunk edge 17 was installed on the outdoor surface of the pillar 3 through a waterproof paper 16. Rock wool (RW) was installed indoors from the waterproof paper 16 as a heat insulating material. The eye plate material 6 was fastened to the outdoor surface of the vertical trunk edge 17. This fastening was performed by nailing with a pitch of 600 mm in the vertical direction.

  Next, fasteners 7 were stacked on both sides of the eye plate material 6, and these fasteners 7 were fixed to the pillars 3 using screws 2. The barbed dimension is 20 mm.

  Thereafter, the two outer wall materials 1 were arranged to face each other. The abutting portion 5 is formed so that the side end surfaces facing each other of the adjacent outer wall materials 1 substantially contact each other. Then, the upward locking piece 13 of the fastener 7 was fitted into the groove on the lower end surface of the outer wall member 1, and the outer wall member 1 was attached and temporarily fixed to the fastener 7.

  Next, the downward locking pieces 14 of the other fasteners 7 are fitted to the real portions 8 of the upper end surfaces of the respective outer wall materials 1 temporarily fixed as described above, and these fasteners 7 are attached to the eye plate material 6. Overlaid on both sides. Then, by fixing these fasteners 7 to the pillars 3 using screws 2, the outer wall material 1 was attached and fixed to the fasteners 7. The length of the screw 2 used for fixing the fastener 7 is 38 mm, and the distance D1 = 28 mm from the center portion on the outdoor surface of the column 3 to the place of insertion. The test body 18 as shown in FIG. 9 was manufactured as described above. Although the fixing structure of the outer wall material in the test body 18 is shown in FIG. 6B, the pillar 3 and the like are not shown.

  Thereafter, the test specimen 18 was heated for 60 minutes according to the ISO standard heating curve using a small heating furnace, and a fire resistance performance test was performed. The average temperature of each layer of the indoor surface of the outer wall material 1 during the test, the outdoor surface and the indoor surface of the RW is shown in FIG. 10A, and the maximum temperature of each part of the column 3 and the vertical trunk edge 17 during the test is shown in FIG. ). As a result of the test, it was confirmed that none of the screws 2 dropped out and the outer wall material 1 did not fall off.

(Comparative example)
As the outer wall material 1, the pillar 3, and the fastener 7, the same materials as in the example were used.

  As the eye plate material 6, a flat plate type joiner formed by providing four long ribs 10 having a substantially V-shaped cross section in the long flat plate portion 9 in the longitudinal direction as shown in FIG. The eye plate material 6 is formed by bending a steel plate. The width of the eye plate material 6 is 76 mm.

  And the test body 18 in which the fixing structure of the outer wall material was formed as described below was manufactured using the outer wall material 1, the pillar 3, the plate member 6 and the fastener 7.

  First, a wooden long vertical trunk edge 17 was installed on the outdoor surface of the pillar 3 through a waterproof paper 16. Rock wool (RW) was installed indoors from the waterproof paper 16 as a heat insulating material. The eye plate material 6 was fastened to the outdoor surface of the vertical trunk edge 17. This fastening was performed by nailing with a pitch of 600 mm in the vertical direction.

  Next, fasteners 7 were stacked on both sides of the eye plate material 6, and these fasteners 7 were fixed to the pillars 3 using screws 2. The barbed dimension is 10 mm.

  Thereafter, the two outer wall materials 1 were arranged to face each other. The abutting portion 5 is formed so that the side end surfaces facing each other of the adjacent outer wall materials 1 substantially contact each other. Then, the upward locking piece 13 of the fastener 7 was fitted into the groove on the lower end surface of the outer wall member 1, and the outer wall member 1 was attached and temporarily fixed to the fastener 7.

  Next, the downward locking pieces 14 of the other fasteners 7 are fitted to the real portions 8 of the upper end surfaces of the respective outer wall materials 1 temporarily fixed as described above, and these fasteners 7 are attached to the eye plate material 6. Overlaid on both sides. Then, by fixing these fasteners 7 to the pillars 3 using screws 2, the outer wall material 1 was attached and fixed to the fasteners 7. The length of the screw 2 used for fixing the fastener 7 is 25 mm, and the distance D1 = 43 mm from the center portion of the pillar 3 on the outdoor surface to the placement location. The test body 18 as shown in FIG. 9 was manufactured as described above. FIG. 3B shows a fixing structure of the outer wall material in the test body 18, but the illustration of the pillar 3 and the like is omitted.

  Thereafter, the test specimen 18 was heated for 60 minutes according to the ISO standard heating curve using a small heating furnace, and a fire resistance performance test was performed. The average temperature of each layer of the indoor surface of the outer wall material 1 during the test, the outdoor surface and the indoor surface of the RW is shown in FIG. 11A, and the maximum temperature of each part of the column 3 and the vertical trunk edge 17 during the test is shown in FIG. ). As a result of the test, it was confirmed that any of the screws 2 was likely to fall out or fall out, and the outer wall material 1 was likely to fall off.

DESCRIPTION OF SYMBOLS 1 Outer wall material 2 Screw 3 Pillar 4 Non-defect part 5 Butt | matching part 6 Eyeplate material 7 Fastener

Claims (3)

  A structure for fixing an outer wall material formed by fixing an outer wall material to a wooden column using a screw, up to a depth reaching a non-defect portion of the column that remains even if heated for 60 minutes according to an ISO standard heating curve A fixing structure of an outer wall material, wherein the screw is driven into the pillar.   The outer wall material fixing structure according to claim 1, wherein a plurality of the outer wall materials are arranged to face each other, and an eye plate material is interposed between the butted portion of the outer wall material and the pillar.   The fixing structure of the outer wall material according to claim 1 or 2, wherein a fastener is fixed to the pillar using the screw, and the outer wall material is attached to the fastener and fixed.

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