Heat insulation board spacer and wooden building using the same

Abstract

Provided are a heat insulation board spacer capable of forming ventilation layers of a plurality of heights, thereby suppressing construction costs, and a wooden building using the same. 【Solution means】 A heat insulation board spacer 26 for installing a heat insulation board spaced apart from a floor board of a wooden building and forming a ventilation layer between the heat insulation board and the floor board has a shape extending in one direction and has a pointed end on the tip side, and includes a spindle member 27 that is used by piercing the pointed end into one surface of the heat insulation board, and a flange member 28 formed in a flat plate shape and having a plurality of fitting holes 28A to 28E respectively having shapes corresponding to cross-sectional shapes at different positions of the pointed end, wherein the pointed end is inserted into any one of the plurality of fitting holes 28A to 28E.

Description

Technical Field

[0001] The present invention relates to a heat insulation board spacer and a wooden building using the same, and particularly to a structure of a ventilation layer provided in a pitched ceiling of a wooden building.

Background Art

[0002] Among the structures of wooden buildings, a roof structure in which the attic is visible to the occupants is called a pitched ceiling and is popular for its sense of openness. Generally, in the roof structure, a roofing material, an underlay material such as a waterproof sheet or a roofing sheet, and a sheathing board that is a base for the roofing material and the underlay material are arranged in order from the outdoor side. The sheathing board is arranged on a plurality of purlins that are arranged parallel to the slope direction of the roof and extend.

[0003] In a pitched ceiling, it is necessary to form a space on the indoor side of the sheathing board between the purlins and use this space as a ventilation layer. This ventilation layer enables the discharge of hot air and moisture, and can prevent condensation. On the indoor side of the ventilation layer, a heat insulation layer made of one or more types of heat insulation materials such as a heat insulation board, glass wool, and urethane foam is arranged between the purlins. A ceiling finishing material is arranged on the indoor side of the purlin.

[0004] Conventionally, various spacer members have been proposed to secure the ventilation layer as described above between the sheathing board and the heat insulation layer.

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, all of the conventional spacers form a ventilation layer with a certain height (the distance between the sheathing board and the heat insulation layer), and the height of the ventilation layer cannot be adjusted. For this reason, when the height of the purlin is high due to structural constraints or the like, if the heat insulation layer is not thickened, a gap will be formed between the heat insulation layer and the ceiling finishing material. However, if the heat insulation layer is made thicker than necessary, there is a problem that it leads to an increase in construction costs.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a heat insulation board spacer capable of forming ventilation layers of a plurality of heights, thereby suppressing construction costs, and a wooden building using the same.

Means for Solving the Problems

[0007] In order to solve the above problems, a heat insulation board spacer according to the present invention is a heat insulation board spacer for installing a heat insulation board at a distance from a floor board of a wooden building and forming a ventilation layer between the heat insulation board and the floor board, having a shape extending in one direction and having a pointed end portion on the tip side, a spindle member used by piercing the pointed end portion into one surface of the heat insulation board, a first fitting hole having a shape corresponding to a first cross section at a first position of the pointed end portion, and a second fitting hole having a shape corresponding to a second cross section at a second position on the base end side of the pointed end portion relative to the first position and larger than the first fitting hole, and a flange member in which the pointed end portion has a shape in which the second cross section is larger than the first cross section, has a cross section through which the first fitting hole can pass from the tip to the first position, has a cross section through which the first fitting hole cannot pass on the base end side of the first position, has a cross section through which the second fitting hole can pass from the first position to the second position, and has a cross section through which the second fitting hole cannot pass on the base end side of the second position. Here, the pointed end portion may have a cross section that is the same as or smaller than the first cross section from the tip to the first position. It may have a cross section larger than the first cross section on the base end side of the first position. It may have a cross section that is the same as or smaller than the second cross section from the first position to the second position. It may have a cross section larger than the second cross section on the base end side of the second position. For example, the pointed end portion may gradually or stepwise increase in cross section from the tip toward the base end side.

[0008] Here, at least the pointed end portion of the spindle member may include three or more flat plate portions extending in the one direction and connected to each other on a central axis. Each of the flat plate portions may become wider from the tip toward the base end side.

[0009] Further, the three or more flat plate portions may have the same shape. Further, the three or more flat plate portions may be arranged at equal angles around the central axis.

[0010] Further, at least the tip portions of the main shaft member may each include a first flat plate portion, a second flat plate portion, a third flat plate portion, and a fourth flat plate portion that extend in the one direction and are connected to each other on the central axis. The first flat plate portion, the second flat plate portion, the third flat plate portion, and the fourth flat plate portion may be arranged at equal angles around the center in this order. Each of the first to fourth flat plate portions may be widened from the tip toward the base end side. Also, the first flat plate portion and the third flat plate portion may have the same shape, and the second flat plate portion and the fourth flat plate portion may also have the same shape.

[0011] Further, the flange member may be in a flat plate shape provided with the first fitting hole and the second fitting hole. Further, a convex portion may be formed on one surface. For example, the convex portion may be a rib provided along the outer edge of the flange member.

[0012] Further, the flange member may have an outer shape that is rotationally symmetric once. For example, the flange member may have an outer shape composed of an arc and straight lines connecting both ends of the arc.

[0013] Further, at least one of the first or second fitting holes may have a shape in which a plurality of long holes into which each flat plate portion fits are connected at one end, and the plurality of long holes are arranged radially. And it may have a curved inner edge at the connecting portion of adjacent long holes. For example, the curved inner edge may be formed convexly toward the center of the first or second fitting hole.

[0014] In addition, the wooden building according to the present invention includes a roof sheathing board, a heat insulation board disposed apart from the sheathing board, and a heat insulation board spacer disposed between the sheathing board and the heat insulation board. The heat insulation board spacer has a shape extending in one direction and has a pointed end on the tip side. The heat insulation board spacer includes a spindle member that pierces the pointed end into one surface of the heat insulation board, a first fitting hole having a shape corresponding to a first cross section at a first position of the pointed end, and a second fitting hole having a shape corresponding to a second cross section at a second position on the base end side of the first position of the pointed end and larger than the first fitting hole. The pointed end has a shape in which the second cross section is larger than the first cross section, has a cross section through which the first fitting hole can pass from the tip to the first position, has a cross section through which the first fitting hole cannot pass on the base end side of the first position, has a cross section through which the second fitting hole can pass from the first position to the second position, and has a cross section through which the second fitting hole cannot pass on the base end side of the second position.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0017] FIG. 1 is a cross-sectional view showing a pitched ceiling of a wooden building according to an embodiment of the present invention. This figure shows a cross-section of the roof perpendicular to the extending direction of the purlin 18. As shown in this figure, the roof of this wooden building is arranged with a roof material 10, an underlay material 12 such as a waterproof sheet or a roofing sheet, and a field board 14 which is a base for the roof material 10 and the underlay material 12 from the outdoor side in order. The field board 14 is fixed on a plurality of purlins 18 arranged in parallel and extending in the gradient direction of the roof.

[0018] Between adjacent purlins 18, heat insulation boards 20 are arranged at intervals parallel to the field board 14. The heat insulation board 20 may be a foamed plastic-based heat insulating material such as phenolic foam, and is a relatively lightweight heat insulating material that maintains a plate-like shape by itself.

[0019] On the indoor side of the heat insulation board 20, other heat insulating materials 22 such as glass wool and urethane foam are arranged. On the indoor side of the rafter 18, a plate-shaped ceiling finishing material 16 is arranged and fixed to the rafter 18. That is, the space surrounded by the ceiling finishing material 16, the rafter 18, and the heat insulation board 20 is filled with the heat insulating material 22.

[0020] In the roof structure as described above, in this embodiment, in order to arrange the heat insulation board 20 parallel and spaced apart from the sheathing board 14, the spacer 26 is used. As will be described later, the spacer 26 has a pointed end portion formed on the tip side. During construction, the pointed end portions of a plurality of spacers 26 are pierced into one surface of the heat insulation board 20 cut so as to fit exactly between the rafters 18. Thereby, the plurality of spacers 26 are fixed upright substantially perpendicular to one surface of the heat insulation board 20. In this state, the heat insulation board 20 is pushed in parallel between the rafters 18 so that the base end of each spacer 26 abuts against the sheathing board 14. By doing so, a ventilation layer 24 with a desired height can be formed between the heat insulation board 20 and the sheathing board 14. As described above, the ventilation layer 24 enables the discharge of hot air and moisture in the roof structure. Note that the heat insulation board 20 is sufficiently lightweight and will not fall off during construction when sandwiched between adjacent rafters 18.

[0021] FIG. 2 is a perspective view of the spacer 26. FIG. 3 is a perspective view showing only the main shaft member 27 of the spacer 26. FIG. 4 is a perspective view showing only the flange member 28 of the spacer 26.

[0022] The spacer 26 includes a main shaft member 27 and a flange member 28, and is used by fitting the pointed end portion of the main shaft member 27 into any one of a plurality of fitting holes 28A to 28E provided in the flange member 28. The main shaft member 27 has a shape extending in one direction and has a central axis 29 as an example. The main shaft member 27 may be formed of any material, but here it is formed of resin in order to be made inexpensively and lightweight. The main shaft member 27 also has a shape (tip shape) in which the cross-sectional area increases from the tip 27t toward the base end 27e side, making it easy to pierce the tip 27t into the heat insulation board 20.

[0023] Here, an example was shown in which the entire part from the tip 27t to the base end 27e is the tip part (the part having the tip shape). However, only a part of a certain length from the tip 27t may be defined as the tip part. Even in such a case, at least the tip part can smoothly pierce the heat insulation board 20. Further, as the tip shape, in addition to a shape in which the cross-sectional area increases at a constant rate toward the base end 27e, a shape in which the cross-sectional area increases at a variable rate, or a shape including a portion where the cross-sectional area does not change in the middle may be used. Furthermore, when the main shaft member 27 is inserted into the fitting holes 28A to 28E, any shape may be used as long as it can pass through to the respective fitting positions A to E. For example, there may be a portion where the cross-sectional area becomes smaller in the middle. Note that at the tip part, it is desirable that the cross-sectional shape at any position on the central axis 29 is a similar shape, and the orientations of the cross-sectional shapes at all positions are aligned. Thereby, the main shaft member 27 can be smoothly inserted into the fitting holes 28A to 28E of the flange member 28.

[0024] The portion other than the tip part may have any shape. For example, it may have a constant cross-sectional area. Further, the base end 27e may be formed in a flat plate shape. By doing so, it can be stably abutted against the field plate 14. Also, the strength of the main shaft member 27 can be improved.

[0025] As shown in FIG. 3, as an example, the tip part of the main shaft member 27 is composed of four flat plate parts 27a to 27d. The flat plate parts 27a to 27d all extend from the tip 27t toward the base end 27e side and are connected to each other on the central axis 29. The flat plate parts 27a to 27d are of the same shape here as an example, and each has an acute angle arranged at the tip 27t and is in the shape of a right triangle with a right angle arranged at the base end 27e. The opposite side of the acute angle arranged at the tip 27t constitutes the base end 27e, and the adjacent side is arranged on the central axis 29.

[0026] Note that, here, the flat plate portions 27a to 27d have the same shape, but they may be different from each other. Also, they do not have to be right-angled triangular shapes. For example, they may have a shape that gradually and / or stepwise widens from the tip 27t toward the base end 27e side. Further, the flat plate portions 27a to 27d are arranged at equal angles around the central axis 29. As a result, the tip portion of the main shaft member 27 has a shape that is rotationally symmetric (four times) as a whole.

[0027] On the other hand, as shown in FIG. 4, the flange member 28 has a disc-shaped flange body 28a, and five fitting holes 28A to 28E are formed in the flange body 28a. The flange member 28 may also be formed of a resin material. The fitting holes 28A to 28E are similar holes, and the area of the holes becomes smaller in this order. Each of the fitting holes 28A to 28E has a shape corresponding to the vertical cross-sectional shape at different positions on the central axis 29 of the tip portion of the main shaft member 27.

[0028] That is, as shown in FIG. 3, fitting positions A to E are set in order from the tip 27t of the main shaft member 27 along the central axis 29 to a position far from the central axis 29, and the cross-sectional shape of the main shaft member 27 at the fitting position A matches the shape of the fitting hole 28A. Similarly, the cross-sectional shape of the main shaft member 27 at the fitting position B matches the shape of the fitting hole 28B, the cross-sectional shape of the main shaft member 27 at the fitting position C matches the shape of the fitting hole 28C, and the cross-sectional shape of the main shaft member 27 at the fitting position D matches the shape of the fitting hole 28D. Further, the cross-sectional shape of the main shaft member 27 at the fitting position E matches the shape of the fitting hole 28E. In the present embodiment, as described above, the shape of the main shaft member 27 is a combination of the same right-angled triangular flat plate portions 27a to 27d, and they are arranged at equal angles (90 degrees) around the central axis 29. Therefore, the fitting holes 28A to 28E are all cross-shaped. Also, the fitting holes 28A to 28E also have a shape that is rotationally symmetric (four times). Note that, here, the cross-sectional shape of the main shaft member 27 at the fitting position A is made to match the shape of the fitting hole 28A, but it does not have to be a perfect match. For example, it may have a shape such that 50% or more of the inner surface of the fitting hole 28A contacts the outer surface of the main shaft member 27. The same applies to the other fitting holes 28B to 28E.

[0029] In the spindle member 27 and the flange member 28 having the above configuration, when the tip of the spindle member 27 is inserted into the fitting hole 28A of the flange member 28, since the cross section from the tip of the spindle member 27 to the fitting position A is smaller than the fitting hole 28A, it can pass from the tip to the fitting position A. On the other hand, since the cross section of the spindle member 27 on the base end side from the fitting position A is larger than the fitting hole 28A, it cannot pass further to the base end side. Therefore, as shown in Fig. 2, the flange member 28 stops at the fitting position A of the spindle member 27. Only the portion of the spindle member 27 on the tip side of the flange member 28 pierces the heat insulating board 20, and the length of the portion on the base end side of the flange member 28 becomes the height of the ventilation layer. Therefore, when using the fitting hole 28A, the spacer 26 can be used as the lowest spacer.

[0030] Similarly, when the tip of the spindle member 27 is inserted into the fitting hole 28B of the flange member 28, the flange member 28 stops at the fitting position B of the spindle member 27, and the spacer 26 can be used as the second lowest spacer. When the tip of the spindle member 27 is inserted into the fitting hole 28C of the flange member 28, the flange member 28 stops at the fitting position C of the spindle member 27, and the spacer 26 can be used as the third lowest spacer. When the tip of the spindle member 27 is inserted into the fitting hole 28D of the flange member 28, the flange member 28 stops at the fitting position D of the spindle member 27, and the spacer 26 can be used as the fourth lowest spacer. When the tip of the spindle member 27 is inserted into the fitting hole 28E of the flange member 28, the flange member 28 stops at the fitting position E of the spindle member 27, and the spacer 26 can be used as the fifth lowest (i.e., the highest) spacer.

[0031] According to the present embodiment, by inserting the tip of the spindle member 27 into any one of the fitting holes 28A to 28E of the flange member 28, it can be used as a spacer of a plurality (here, five) of heights. As a result, the height of the ventilation layer 24 can be adjusted with only one type of spacer 26. Therefore, when the purlin is tall due to structural constraints or the like, the ventilation layer 24 can be made higher to avoid the heat insulating layer, particularly the heat insulating material 22, becoming unnecessarily thick. Thereby, the construction cost can be suppressed.

[0032] Also, if the spindle member 27 has a structure combined with the flat plate portions 27a to 27d as described above, the strength of the spindle member 27 can be sufficiently ensured with a small amount of raw materials. As a result, the spindle member 27 does not bend after construction.

[0033] Further, when the spindle member 27 is pierced through the heat insulating board 20, the contact area thereof becomes large, so there is an advantage that the spindle member 27 is difficult to come off from the heat insulating board 20 due to friction. Furthermore, since the areas of the fitting holes 28A to 28E become small, there is also an advantage that the strength of the flange member 28 is maintained even when they are formed in the flange main body 28a.

[0034] Furthermore, since the spindle member 27 and the fitting holes 28A to 28E have a rotationally symmetric shape, there is also an advantage that the spindle member 27 can be attached without worrying about the orientation of the flange member 28 at the construction site.

[0035] Furthermore, when trying to construct the same or similar wooden buildings in various regions, it may be necessary to vary the thickness of the heat insulating material 22 for each region in order to satisfy the housing heat insulation performance determined for each region. Even in such a case, by using the spacer 26 according to the present embodiment, the ventilation layer 24 having a desired height can be easily formed, and thereby the heat insulating material 22 can be constructed with a necessary and sufficient thickness for each region.

[0036] Note that the present invention is not limited to the above-described embodiments, and various modifications can be made. For example, the shape of the spindle member is not limited to the above-described embodiments, and various shapes may be adopted. For example, the spindle member may be conical, and accordingly, the fitting holes of the flange member may be circular holes with various diameters. Also, in the above-described embodiment, the spindle member 27 is composed of four flat plates, but it may be composed of three flat plates.

[0037] FIG. 5 is a side view of the spindle member of the spacer according to the first modification, and FIG. 6 is a view showing its base end face. FIG. 7 is a plan view of the flange member used for the spindle member shown in FIGS. 5 and 6.

[0038] As shown in FIGS. 5 and 6, the spindle member 30 of the spacer according to the first modification is composed of three flat plate portions 30a to 30c. The flat plate portions 30a to 30c are of the same right-angled triangle shape and are connected at the central axis 31. The flat plate portions 30a to 30c all have an acute angle arranged on the tip side, a right angle arranged on the base end side, and the adjacent side of the acute angle is arranged on the central axis 31. Also, the flat plate portions 30a to 30c are arranged at equal angles around the central axis 31. Thereby, the tip portion of the spindle member 30 has a rotationally symmetric shape as a whole (three times).

[0039] The flange member 40 used together with the spindle member 30 has a disk-shaped flange body 40a as shown in Fig. 7, and five fitting holes 40A to 40E are formed in the flange body 40a. The fitting holes 40A to 40E are similar holes, and the area of the holes decreases in this order. All of them have a shape corresponding to the cross-sectional shape at different positions of the tip of the spindle member 30. That is, as shown in Fig. 5, fitting positions A to E are set in order from the tip of the spindle member 30 along the central axis 31, and the cross-sectional shape of the spindle member 30 at the fitting position A matches the shape of the fitting hole 40A. Similarly, the cross-sectional shape of the spindle member 30 at the fitting position B matches the shape of the fitting hole 40B, the cross-sectional shape of the spindle member 30 at the fitting position C matches the shape of the fitting hole 40C, and the cross-sectional shape of the spindle member 30 at the fitting position D matches the shape of the fitting hole 40D. Furthermore, the cross-sectional shape of the spindle member 30 at the fitting position E matches the shape of the fitting hole 40E.

[0040] Also, by inserting the tip of the spindle member 30 into any one of the fitting holes 40A to 40E of the flange member 40 with the spacer according to the first modification, it can be used as spacers of a plurality of heights. In particular, according to the spacer according to the first modification, it can be formed with less material, so that weight reduction and cost reduction can be achieved.

[0041] Fig. 8 is a perspective view showing the spacer according to the second modification. Fig. 9 is a perspective view showing the spindle member 50 of the spacer shown in Fig. 8, and Fig. 10 is a perspective view showing the flange member 60 of the same spacer. Also, Fig. 11 is a perspective view showing another usage mode of the spacer shown in Fig. 8.

[0042] As shown in FIG. 9, the tip of the spindle member 50 is composed of four flat plate portions 50a to 50d. The flat plate portions 50a to 50d all extend from the tip 50t toward the base end 50e side and are connected to each other on the central axis 51. The flat plate portions 50a to 50d are all in the shape of a right triangle with an acute angle arranged at the tip 50t and a right angle arranged at the base end 50e. The opposite side of the acute angle arranged at the tip 50t constitutes the base end 27e, and the adjacent side is arranged on the central axis 51. Here, in the spindle member 50, the flat plate portion 50a and the flat plate portion 50c have the same triangular shape, and the flat plate portion 50b and the flat plate portion 50d also have the same triangular shape. However, the flat plate portion 50b and the flat plate portion d are in a triangular shape that is wider (i.e., the opposite side of the acute angle is longer) than the flat plate portion 50a and the flat plate portion 50c. The flat plate portion 50a and the flat plate portion 50c are arranged on the same plane, and the flat plate portion 50b and the flat plate portion 50d are arranged on the same plane. And the flat plate portions 50a and 50c are orthogonal to the flat plate portions 50b and 50d. That is, the flat plate portions 50a to 50d are arranged at equal angles (90 degrees) around the central axis 51 in this order. With the above configuration, the cross-sectional shape of the tip of the spindle member 50 is a two-fold rotationally symmetric cross shape in which the cross-sectional portions corresponding to the flat plate portions 50a and 50c are short and of the same length, and the cross-sectional portions corresponding to the flat plate portions 50b and 50d are long and of the same length.

[0043] Here, the flat plate portions 50a to 50d are triangular, but any shape that gradually and / or stepwise widens from the tip 50t toward the base end 50e side may be used.

[0044] On the other hand, as shown in FIG. 10, the flange member 60 has a disk-shaped flange body 60a, and two fitting holes 60A and 60B are formed in the flange body 60a. The fitting holes 60A and 60B are similar holes, and the area of the holes decreases in this order. Both have a shape corresponding to the shape of the cross section perpendicular to the central axis 29 at different positions of the tip of the spindle member 27.

[0045] That is, as shown in FIG. 9, fitting positions A1, A2, B1, and B2 are set in order from the tip 50t of the spindle member 50 along the central axis 51, and the cross-sectional shape of the spindle member 50 at the fitting position A1 matches the shape of the fitting hole 60A. Similarly, the cross-sectional shape of the spindle member 50 at the fitting position B1 matches the shape of the fitting hole 60B. That is, the shapes of the fitting holes 60A and 60B are similar, and both are cross-shaped with two-fold rotational symmetry. Specifically, the fitting hole 60A has partial holes 60A-a and 60A-c corresponding to the cross-sections of the flat plates 50a and 50c, respectively, and partial holes 60A-b and 60A-d corresponding to the cross-sections of the flat plates 50b and 50d, respectively. The partial holes 60A-a and 60A-c are elongated holes of the same length and are arranged on the same straight line. The partial holes 60A-b and 60A-d are also elongated holes of the same length and are arranged on the same straight line. However, the hole length of the partial holes 60A-a and 60A-c is shorter than the hole length of the partial holes 60A-b and 60A-d. The extending direction of the partial holes 60A-a and 60A-c is orthogonal to the extending direction of the partial holes 60A-b and 60A-d.

[0046] Similarly, the fitting hole 60B has partial holes 60B-a and 60B-c corresponding to the cross-sections of the flat plates 50a and 50c, respectively, and partial holes 60B-b and 60B-d corresponding to the cross-sections of the flat plates 50b and 50d, respectively. The partial holes 60B-a and 60B-c are elongated holes of the same length and are arranged on the same straight line. The partial holes 60B-b and 60B-d are also elongated holes of the same length and are arranged on the same straight line. However, the hole length of the partial holes 60B-a and 60B-c is shorter than the hole length of the partial holes 60B-b and 60B-d. The extending direction of the partial holes 60B-a and 60B-c is orthogonal to the extending direction of the partial holes 60B-b and 60B-d.

[0047] In the spindle member 50 and the flange member 60 having the above configuration, when the tip of the spindle member 50 is inserted into the fitting hole 60A of the flange member 60 in its original orientation, that is, with the flat plate portion 50a in the partial hole 60A-a, the flat plate portion 50b in the partial hole 60A-b, the flat plate portion 50c in the partial hole 60A-c, and the flat plate portion 50d in the partial hole 60A-d, as shown in FIGS. 8 and 9, the flange member 60 will stop at the fitting position A1 of the spindle member 50. Similarly, when the tip of the spindle member 50 is inserted into the fitting hole 60B of the flange member 60 in its original orientation, that is, with the flat plate portion 50a in the partial hole 60B-a, the flat plate portion 50b in the partial hole 60B-b, the flat plate portion 50c in the partial hole 60B-c, and the flat plate portion 50d in the partial hole 60B-d, the flange member 60 will stop at the fitting position B1 of the spindle member 50.

[0048] On the other hand, when the tip of the spindle member 50 is rotated 90 degrees around the central axis 51 and inserted into the fitting hole 60A of the flange member 60, as shown in FIG. 11 as an example, the flat plate portion 50a fits into the partial hole 60A-b, the flat plate portion 50b fits into the partial hole 60A-c, the flat plate portion 50c fits into the partial hole 60A-d, and the flat plate portion 50d fits into the partial hole 60A-a. Although not shown, when it is rotated 90 degrees in the reverse direction around the central axis 51 and inserted into the fitting hole 60A of the flange member 60, the flat plate portion 50a fits into the partial hole 60A-d, the flat plate portion 50b fits into the partial hole 60A-a, the flat plate portion 50c fits into the partial hole 60A-b, and the flat plate portion 50d fits into the partial hole 60A-c. In this way, as shown in FIGS. 9 and 11, the flange member 60 will stop at the fitting position A2 of the spindle member 50. That is, as described above, although the flat plate portions 50b and 50d are wider than the flat plate portions 50a and 50c, the partial holes 60A-a and 60A-c into which they are inserted are elongated holes shorter than the partial holes 60A-b and 60A-d. Therefore, with the flat plate portions 50b and 50d completely fitted into the partial holes 60A-a and 60A-c, the flange member 60 cannot be inserted further deeper, and the flange member 60 will stop at the fitting position A2. In this case, the flat plate portions 50a and 50c are partially fitted into the partial holes 60A-b and 60A-d.

[0049] Similarly, when the tip of the spindle member 50 is rotated 90 degrees around the central axis 51 and inserted into the fitting hole 60B of the flange member 60, although not shown in the drawings, the flat plate portion 50a fits into the partial hole 60B-b, the flat plate portion 50b fits into the partial hole 60B-c, the flat plate portion 50c fits into the partial hole 60B-d, and the flat plate portion 50d fits into the partial hole 60B-a, respectively. Or, when it is rotated 90 degrees in the reverse direction around the central axis 51 and inserted into the fitting hole 60B of the flange member 60, the flat plate portion 50a fits into the partial hole 60B-d, the flat plate portion 50b fits into the partial hole 60B-a, the flat plate portion 50c fits into the partial hole 60B-b, and the flat plate portion 50d fits into the partial hole 60B-c, respectively. In this way, the flange member 60 will stop at the fitting position B2 of the spindle member 50.

[0050] According to the spacer according to the second modification, when the tip of the spindle member 50 is inserted into the fitting hole 60A of the flange member 60 in its original orientation, the flange member 60 stops at A1 and can be used as the lowest spacer. When the tip of the spindle member 50 is rotated 90 degrees and inserted into the fitting hole 60A of the flange member 60, the flange member 60 stops at A2 and can be used as the second lowest spacer. When the tip of the spindle member 50 is inserted into the fitting hole 60B of the flange member 60 in its original orientation, the flange member 60 stops at B1 and can be used as the third lowest spacer. When the tip of the spindle member 50 is rotated 90 degrees and inserted into the fitting hole 60B of the flange member 60, the flange member 60 stops at B2 and can be used as the highest spacer.

[0051] According to the spacer according to the second modification, since the fitting holes 60A and 60B can each achieve two types of heights, the number of fitting holes opened in the flange member 60 can be reduced. Thereby, the strength of the flange member 60 can be improved.

[0052] Here, the number of fitting holes opened in the flange member 60 is set to two, but three or more fitting holes may be opened. Or, only one fitting hole may be opened in the flange member 60.

[0053] FIG. 12 is a perspective view showing a flange member of the heat insulation board spacer according to the third modification. FIG. 13 is a bottom view of the flange member 70, showing the back surface of the flange member 70. FIG. 14 is an enlarged plan view of the fitting holes provided in the flange member 70. The flange member 70 shown in these figures is used together with the main shaft member 30 (see FIG. 5) according to the second modification instead of the flange member 40 (see FIG. 7) according to the second modification.

[0054] The flange member 70 has a flat plate portion 70a that is substantially circular in a flat plate shape, and seven fitting holes 70A to 70G are formed in the flat plate portion 70a. The flat plate portion 70a has a shape in which a part of a disc is linearly cut out. That is, the outer edge of the flange member 70 is composed of an arc portion 70c and a straight portion 70d connecting both ends of the arc portion. Further, a rib 70b is provided on one surface side of the flat plate portion 70a. This rib 70b is erected along the peripheral edge of the flat plate portion 70a. Note that the main shaft member 30 may be fitted into the fitting holes 70A to 70G from the surface where the rib 70b is provided, or the main shaft member 30 may be fitted into the fitting holes 70A to 70G from the surface where the rib 70b is not provided. That is, when attaching the heat insulation board spacer to the heat insulation board 20, the surface where the rib b is provided may be in contact with the heat insulation board 20, or the surface where the rib b is not provided may be in contact with the heat insulation board 20.

[0055] The fitting holes 70A to 70G become smaller in this order and each have a shape corresponding to the cross section of seven fitting positions arranged from the base end side to the tip end side of the main shaft member 30. Thereby, for example, the fitting hole 70A fits with the main shaft member 30 at the fitting position on the most base end side of the main shaft member 30. Further, for example, the fitting hole 70G fits with the main shaft member 30 at the fitting position on the most tip end side of the main shaft member 30.

[0056] Specifically, the fitting holes 70A to 70G have a shape in which one ends of three long holes are connected. Each long hole is arranged at an equal angular interval and forms a radial pattern. And the flat plate portions 30a to 30c of the main shaft member 30 fit into each long hole portion. In particular, a curved inner edge is formed at the connecting portion of adjacent long holes. As an example, as shown in FIG. 14, the fitting hole 70A has a shape in which three long holes 80 are arranged radially, and a curved inner edge 81 is formed at the connecting portion of adjacent long holes 80. Specifically, this inner edge 81 has a convex shape toward the center of the fitting hole 70A, that is, a shape protruding toward the center. As a result, the width W2 of the base end portion of the long hole 80 is wider than the width W1 of the tip end portion of the long hole 80. The width W1 of the tip end portion is substantially equal to the thickness of the flat plate portions 30a to 30c of the main shaft member 30. On the other hand, the width W2 of the base end portion is wider than that.

[0057] As described above, since the flange member 70 is provided with the rib 70b, the strength of the flange member 70 can be increased thereby. Also, an operator can know which surface of the flange member 70 he / she is touching just by touching it, relying on the presence or absence of the rib 70b. Further, since the flange member 70 has an outer shape having a straight portion 70d, the operator can know the orientation of the flange member 70 (the relative position of the straight portion 70d with respect to the arc portion 70c) just by touching it, relying on the position of the straight portion 70d. Thereby, the flange member 70 can always be placed on the heat insulating board 70 in the same state. For example, the flange member 70 can be placed on the heat insulating board 70 such that the surface without the rib b always contacts the heat insulating board 20 and the straight portion 70d always comes to the front side.

[0058] If the flange member 70 is always placed on the heat insulation board 70 in the same state, each of the fitting holes 70A to 70G will always be located at the same relative position with respect to the operator. Therefore, the operator can surely fit the spindle member 30 into the target fitting hole. For example, when the flange member 70 is placed on the heat insulation board such that the rib 70b is upward and the straight portion 70d is forward, the fitting hole 70D will always be located in the upper right portion of the flange member 70, and the operator can easily fit the spindle member 30 into the fitting hole 70D. At one construction site, a large number of heat insulation board spacers of the same height are required. According to this modification example, the work of fitting the spindle member 30 into a specific one of the fitting holes 70A to 70G can be made more efficient.

[0059] Also, as described above, the fitting holes 70A to 70G have curved inner edges at the connecting portions of the adjacent long holes, and the opening at the central portion is wider compared to the flange member 40 shown in FIG. 7. Therefore, the tip of the spindle member 30 can be easily inserted into the fitting holes 70A to 70G. Further, since the inner edge of the connecting portion of the long holes is convex toward the center of the fitting holes 70A to 70G, when the tip of the spindle member 30 is inserted into the fitting holes 70A to 70G, even if the angles of the two are misaligned, the tip of the spindle member 30 will abut against the convex portion of the fitting holes 70A to 70G, and the spindle member 30 can be rotated clockwise or counterclockwise. As a result, each flat plate portion 30a to 30c of the spindle member 30 will be guided by the long holes of the fitting holes 70A to 70G respectively. Thus, according to this modification example, the work of fitting the spindle member 30 into the fitting holes 70A to 70G can be made even more efficient.

[0060] Note that the outer shape of the flange member 70 is not limited to the above-described one. As long as it has a one-time rotationally symmetric outer shape, the operator can grasp the direction of the flange member 70 just by touching it. Also, the one provided on one surface of the flat plate portion 70a is not limited to the rib 70b at the peripheral edge. Other shaped convex portions may be provided. For example, one or a plurality of conical convex portions that pierce the heat insulation board 20 may be provided. Even in this case, the operator can grasp the front and back of the flange member 70 just by touching it.

Explanation of Reference Numerals

[0061] 10 Roof material, 12 Underlay material, 14 Floor board, 16 Ceiling finishing material, 18 Vertical post, 20 Insulation board, 22 Heat insulation material, 24 Ventilation layer, 26 (Insulation board) Spacer, 27, 30, 50 Main shaft member, 27a~27d, 30a~30c, 50a~50d Flat plate part, 28, 40, 60, 70 Flange member, 28A~28E, 40A~40E, 60A, 60B, 70A~70G Fitting hole, 29, 31, 51 Central axis, A~E, A1, A2, B1, B2 Fitting position.

Claims

1. An insulation board spacer for installing an insulation board at a distance from a roof board of a wooden building and forming an air layer between the insulation board and the roof board, A main shaft member having a shape extending in one direction and a pointed end portion at a tip end side, the pointed end portion being inserted into one surface of the heat insulating board; a flange member in which a first fitting hole having a shape corresponding to a first cross section at a first position of the pointed end, and a second fitting hole having a shape corresponding to a second cross section at a second position on the base end side of the pointed end from the first position and larger than the first fitting hole are formed; The pointed tip is The second cross section is larger than the first cross section, a cross section through which the first fitting hole can pass from a tip end to the first position, and a cross section through which the first fitting hole cannot pass on a base end side of the first position; a cross section through which the second fitting hole can pass from the first position to the second position, and a cross section through which the second fitting hole cannot pass on a base end side of the second position; Insulation board spacer.

2. 2. The insulation board spacer according to claim 1, The pointed tip is A cross section from a tip end to the first position that is equal to or smaller than the first cross section, and a cross section on a proximal side of the first position that is larger than the first cross section, A cross section from the first position to the second position that is equal to or smaller than the second cross section, and a cross section on the proximal side of the second position that is larger than the second cross section. Insulation board spacer.

3. 3. The insulation board spacer according to claim 2, The pointed portion has a cross section that gradually or stepwise increases from the tip to the base end. Insulation board spacer.

4. 2. The insulation board spacer according to claim 1, At least the pointed end of the main shaft member includes three or more flat plate portions each extending in the one direction and connected to each other at a central axis. Insulation board spacer.

5. 5. The insulation board spacer according to claim 4, The three or more flat plate portions have the same shape. Insulation board spacer.

6. 6. The insulation board spacer according to claim 5, The three or more flat plate portions are arranged at equal angles around the central axis. Insulation board spacer.

7. 5. The insulation board spacer according to claim 4, At least the pointed end portion of the main shaft member includes a first flat plate portion, a second flat plate portion, a third flat plate portion, and a fourth flat plate portion each extending in the one direction and connected to each other at a central axis, the first flat plate portion, the second flat plate portion, the third flat plate portion, and the fourth flat plate portion are arranged in this order at equal angles around the central axis; The first flat plate portion and the third flat plate portion have the same shape, and the second flat plate portion and the fourth flat plate portion have the same shape. Insulation board spacer.

8. 2. The insulation board spacer according to claim 1, The flange member has a flat plate shape in which the first fitting hole and the second fitting hole are provided, and a protrusion is formed on one surface of the flange member. Insulation board spacer.

9. 9. The insulation board spacer according to claim 8, The protruding portion is a rib provided along an outer edge of the flange member. Insulation board spacer.

10. 9. The insulation board spacer according to claim 8, The flange member has an outer shape with one-fold rotational symmetry. Insulation board spacer.

11. 11. The insulation board spacer according to claim 10, The flange member has an outer shape consisting of an arc and a straight line connecting both ends of the arc. Insulation board spacer.

12. 7. The insulation board spacer according to claim 6, At least one of the first and second fitting holes has a shape in which a plurality of elongated holes into which the flat plate portions are fitted are connected at one end, the plurality of elongated holes are arranged radially, and has a curved inner edge at the connecting portion of the adjacent elongated holes. Insulation board spacer.

13. 13. The insulation board spacer according to claim 12, The curved inner edge is formed convexly toward the center of the first or second fitting hole. Insulation board spacer.

14. The roof sheathing and An insulating board arranged at a distance from the roofing board; An insulation board spacer disposed between the roof board and the insulation board; Including, The insulation board spacer is A main shaft member having a shape extending in one direction and a pointed end portion at a tip end side, the pointed end portion being inserted into one surface of the heat insulating board; a flange member in which a first fitting hole having a shape corresponding to a first cross section at a first position of the pointed end, and a second fitting hole having a shape corresponding to a second cross section at a second position on the base end side of the pointed end from the first position and larger than the first fitting hole are formed; The pointed tip is The second cross section is larger than the first cross section, a cross section through which the first fitting hole can pass from a tip end to the first position, and a cross section through which the first fitting hole cannot pass on a base end side of the first position; a cross section through which the second fitting hole can pass from the first position to the second position, and a cross section through which the second fitting hole cannot pass on a base end side of the second position; wooden building.

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