Ceiling substructure

Abstract

To provide a ceiling substrate structure capable of easily improving the appearance design of a ceiling surface material while having excellent workability.SOLUTION: A ceiling substrate structure 100 for supporting a ceiling surface material 10 from above. On the ceiling surface material 10, there provided a plurality of vertical ceiling joists 20 arranged on the left and right sides with a prescribed interval, at least one or more horizontal ceiling joists 30, and auxiliary ceiling joists 40. The lateral ceiling joist 30 is passed over the plurality of vertical ceiling joists 20 and fixed to the plurality of vertical ceiling joists 20. The auxiliary ceiling joist 40 is fixed to the horizontal ceiling joist 30 so as to connect between the horizontal ceiling joist 30 and the ceiling surface material 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a ceiling base structure, and generally relates to a ceiling base structure that supports a ceiling facing material from above.

Background Art

[0002] Conventionally, in a residential building, a ceiling structure for constructing a ceiling portion is known. For example, Patent Document 1 discloses a frame material for an eaves ceiling edge and an eaves ceiling using the frame material for an eaves ceiling edge. The frame material for an eaves ceiling edge supports the ceiling facing material of the eaves ceiling from the back side, and the eaves ceiling facing material can be connected to the vertical member of the frame material for an eaves ceiling edge. Thereby, the ceiling facing material can be attached to the frame material for an eaves ceiling edge.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, in order to fix the eaves ceiling facing material to the vertical member of the frame material for an eaves ceiling edge, the eaves ceiling facing material is disposed on the front side of the frame material for an eaves ceiling edge, and a fixing tool such as a nail is struck until it reaches the vertical member from the front side of the eaves ceiling facing material. Here, the front side of the eaves ceiling facing material means the lower side of the eaves ceiling facing material, and is usually a place where a person can easily see. And, the above fixing tools are struck many times along the direction in which the vertical member extends. Therefore, when the front side of the eaves ceiling facing material is viewed from below, the heads (such as nail heads) of the fixing tools struck on the front side are arranged along the direction in which the vertical member extends, so that they are likely to be conspicuous. For this reason, in the eaves ceiling described in Patent Document 1, there is a problem that the appearance design property of the front side thereof is likely to be impaired.

[0005] The object of the present invention is to provide a ceiling substrate structure that has good workability and easily improves the appearance and design of the ceiling surface material. [Means for solving the problem]

[0006] A ceiling substructure according to one aspect of the present invention supports a ceiling surface material from above. The ceiling substructure comprises a plurality of vertical furring strips arranged horizontally at predetermined intervals on the ceiling surface material, at least one horizontal furring strip, and auxiliary furring strips. The horizontal furring strips are stretched over the plurality of vertical furring strips and fixed to the plurality of vertical furring strips. The auxiliary furring strips are fixed to the horizontal furring strips so as to connect the horizontal furring strips and the ceiling surface material. Furthermore, it also exists in areas where the aforementioned lateral field edge does not exist in a plan view. ru. [Effects of the Invention]

[0007] According to one aspect of the present invention, it is possible to provide a ceiling substrate structure that has good workability and easily improves the appearance and design of the ceiling surface material. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1A is a perspective view of the back surface of a ceiling surface material attached to a ceiling substrate structure according to one embodiment of the present invention, as seen from above, and Figure 1B is a conceptual diagram of the cross section at the X1-X1 cutting line in Figure 1A as viewed from the left and right directions. [Figure 2] Figure 2 is an exploded perspective view of a ceiling substrate structure according to one embodiment of the present invention. [Figure 3] Figure 3 is a conceptual diagram showing modified example 1 of the ceiling substrate structure according to one embodiment of the present invention as seen from the surface of the ceiling material. [Figure 4] Figure 4 is a conceptual diagram showing modified example 2 of the ceiling substrate structure according to one embodiment of the present invention as seen from the surface of the ceiling material. [Figure 5] Figure 5 is a conceptual diagram of modified example 3 of the ceiling substrate structure according to one embodiment of the present invention, as seen from the surface of the ceiling material. [Figure 6]Figure 6 is a conceptual diagram showing modified example 4 of the ceiling substrate structure according to one embodiment of the present invention as seen from the surface of the ceiling material. [Figure 7] Figure 7 is a conceptual diagram showing modified example 5 of the ceiling substrate structure according to one embodiment of the present invention as viewed from the surface of the ceiling material. [Figure 8] Figure 8A is a perspective view of the back surface of a ceiling panel attached to a conventional ceiling substrate structure, as seen from above, and Figure 8B is a conceptual diagram of the cross section at the X2-X2 cutting line in Figure 8A as viewed from the left and right directions. [Figure 9] Figure 9A is a perspective view of the back surface of a ceiling panel attached to a conventional ceiling substrate structure, as seen from above. Figure 9B is a conceptual diagram of the cross section at the X3-X3 cutting line in Figure 9A as viewed from the left and right directions. Figure 9C is a plan view of a portion of Figure 9A as seen from above. [Modes for carrying out the invention]

[0009] <Embodiment> The embodiments of the present invention will be described below. However, the present invention is not limited to the embodiments described below. The embodiments described below are merely examples of various embodiments of the present invention, and various modifications are possible depending on the design, as long as the objective of the present invention is achieved.

[0010] (1) Overview The ceiling substructure 100 according to this embodiment supports the ceiling surface material 10 from above. The ceiling substructure 100 comprises a plurality of vertical furring strips 20, at least one or more horizontal furring strips 30, and auxiliary furring strips 40. The plurality of vertical furring strips 20 are arranged horizontally on the ceiling surface material 10 at predetermined intervals. The horizontal furring strips 30 are stretched over the plurality of vertical furring strips 20 and fixed to the plurality of vertical furring strips 20. The auxiliary furring strips 40 are fixed to the horizontal furring strips 30 so as to connect the horizontal furring strips 30 and the ceiling surface material 10. The ceiling substructure 100 according to this embodiment has good workability and easily improves the appearance and design of the ceiling surface material. As a result, the ceiling substructure 100 is easily applicable as a frame material for furring strips that supports the ceiling surface material 10 that constitutes the ceiling of a building from above. The ceiling substructure 100 is particularly suitable for use as a frame material for joists that supports the ceiling surface material 10 of the eaves ceiling from above.

[0011] (2) Details [Ceiling substructure] The ceiling substrate structure 100 according to this embodiment (hereinafter also referred to as Embodiment 1) will be described with reference to Figures 1 and 2.

[0012] As described above, the ceiling base structure 100 according to this embodiment supports the ceiling surface material 10 from above. More specifically, the ceiling base structure 100, which is located on the back surface 11 of the ceiling surface material 10, supports the ceiling surface material 10 from above by being fixed to the ceiling surface material 10 with fasteners 50 such as nails.

[0013] In this specification, the direction in which the horizontal furring strip 30 extends is defined as the left-right direction, the direction in which the vertical furring strip 20 extends is defined as the front-back direction, and the direction perpendicular to the left-right direction and the front-back direction is defined as the up-down direction. Furthermore, "upper" refers to the position vertically above in the up-down direction, and "lower" refers to the position vertically below in the up-down direction.

[0014] As shown in Figure 1A, the ceiling base structure 100 is formed by assembling a plurality of vertical joists 20 arranged horizontally at predetermined intervals on the ceiling surface material 10, and at least one horizontal joist 30, in a rectangular frame shape.

[0015] As the material of the ceiling surface material 10, for example, wood can be mentioned, but it may also be plastic or metal. Further, as more specific members of the ceiling surface material 10, plywood, gypsum board, rock wool board, glass wool board, square timber, light steel frame, etc. can be mentioned. As the materials of the vertical eaves 20 and the horizontal eaves 30, for example, wood can be mentioned, but it may also be plastic or metal.

[0016] In FIG. 1B, a conceptual diagram when the cross-section at the X1-X1 cutting line of FIG. 1A is viewed from the left-right direction is shown. This cross-section is orthogonal to the ceiling surface material 10 provided with the ceiling base structure 100. As shown in FIG. 1B, in the ceiling base structure 100, fixtures 50 such as nails and screws are driven from the surface 12 of the ceiling surface material 10, and the vertical eaves 20 and the ceiling surface material 10 are fixed.

[0017] Further, when the ceiling base structure 100 is assembled and formed in a rectangular frame shape, the horizontal eaves 30 are spanned over a plurality of vertical eaves 20 arranged in parallel to each other and are fixed to the plurality of vertical eaves 20. More specifically, it is as follows. As shown in FIG. 2, first, the horizontal eaves 30 are placed and spanned over the vertical eaves 20 from above. At this time, the direction in which the horizontal eaves 30 extend and the direction in which the vertical eaves 20 extend are orthogonal. Next, at the location where the vertical eaves 20 and the horizontal eaves 30 are orthogonally overlapped vertically, connectors 21 such as nails and screws are driven from above, and the horizontal eaves 30 are fastened to the vertical eaves 20. Thereby, the horizontal eaves 30 and the vertical eaves 20 are fixed. And at the location where the left-right extending frame members 31 located on the outermost side of the ceiling base structure 100 formed by being assembled in a frame shape are in contact with the vertical eaves 20, connectors 21 such as nails and screws are also driven. And the frame members 31 and the vertical eaves 20 are fastened to be connected to each other. In this specification, "parallel" is a concept including not only strict parallel but also substantially parallel. Also, in this specification, "orthogonal" is a concept including not only strictly perpendicular intersection but also substantially orthogonal.

[0018] As described above, the ceiling framing structure 100 is equipped with auxiliary furring strips 40. These auxiliary furring strips 40 are provided in the ceiling framing structure 100 by being connected to the horizontal furring strips 30 of the ceiling framing structure 100. Furthermore, the number of auxiliary furring strips 40 provided in the ceiling framing structure 100 may be one or two or more.

[0019] The shapes of the upper surface 401 and lower surface 402 of the auxiliary furring strip 40 are, for example, rectangular or parallelogram. It is also preferable that the shapes of the upper surface 401 and lower surface 402 of the auxiliary furring strip 40 are the same. Furthermore, the material of the auxiliary furring strip 40 may be, for example, wood, but it may also be plastic or metal. The material of the auxiliary furring strip 40 may be the same as or different from that of the horizontal furring strip 30.

[0020] When connecting auxiliary furring strips 40 to horizontal furring strips 30, it is preferable that the vertical thickness of the auxiliary furring strips 40 and the vertical thickness of the vertical furring strips 20 are the same. In this case, the ceiling surface material 10 and the horizontal furring strips 30 can be fixed together without any gaps. This makes it easier for the ceiling base structure 100 to provide stronger support to the ceiling surface material 10 from above.

[0021] One method for connecting the auxiliary furring strips 40 to the horizontal furring strips 30 is, for example, as shown in Figure 1B, in the absence of the ceiling panel 10, fasteners 22 such as nails or screws are driven into the auxiliary furring strips 40 from below, thereby connecting the auxiliary furring strips 40 and the horizontal furring strips 30 together.

[0022] When connecting an auxiliary furring strip 40 to a horizontal furring strip 30, the auxiliary furring strip 40 is located in the gap between the horizontal furring strip 30 and the ceiling panel 10. In this case, the horizontal furring strip 30 and the ceiling panel 10 can be connected via the auxiliary furring strip 40. That is, the horizontal furring strip 30 and the ceiling panel 10 are fixed together via the auxiliary furring strip 40. More specifically, when connecting an auxiliary furring strip 40 to a horizontal furring strip 30, the ceiling panel 10 and the auxiliary furring strip 40 are fastened together by a fastener 50. The ceiling panel 10 and the horizontal furring strip 30 are then fixed together via the auxiliary furring strip 40. The fastener 50 is nailed to the ceiling panel 10 from the surface 12 side, at the point where the ceiling panel 10 overlaps with the auxiliary furring strip 40.

[0023] In the ceiling substrate structure 100 constructed in this manner, the fastener heads 51 of the fasteners 50 that fix the ceiling surface material 10 and the vertical joists 20, and the fastener heads 52 of the fasteners 50 that fix the ceiling surface material 10 and the horizontal joists 30 via the auxiliary joists 40, are visible on the surface 12 of the ceiling surface material 10. The fastener heads 52 are not limited to the locations where the vertical joists 20 are present. Therefore, these fastener heads 51 and 52 can be distributed across the entire surface 12 of the ceiling surface material 10. Note that the fastener heads 51 and 52 are the heads of the fasteners 50. More specifically, if the fastener 50 is a nail, then the fastener heads 51 and 52 are nail heads. If the fastener 50 is a screw, then the fastener heads 51 and 52 are screw heads.

[0024] In the ceiling base structure 100, as described above, the fixing heads 51 and 52 of the fixing device 50 can be distributed across the entire surface 12 of the ceiling panel 10. Therefore, the aesthetic appearance of the surface 12 of the ceiling panel 10 on which this ceiling base structure 100 is installed tends to be good. In addition, the ceiling base structure 100 is more likely to ensure sufficient support for the entire ceiling panel 10 from above.

[0025] To illustrate the effects of this embodiment in detail, Figures 8A and 8B show a conventional example.

[0026] Figure 8A shows a ceiling substructure 200 in which a connector 21 is attached from above to the point where vertical joists 20 and horizontal joists 30 intersect perpendicularly. This ceiling substructure 200 is formed by connecting the vertical joists 20 and horizontal joists 30. Figure 8B shows a conceptual diagram of the cross section at the X2-X2 cutting line in Figure 8A as viewed from the left and right directions. This cross section is perpendicular to the ceiling surface material 10 on which the ceiling substructure 200 is provided.

[0027] As shown in Figure 8A, this ceiling substructure 200 does not have auxiliary furring strips 40. Furthermore, in the ceiling substructure 200, the distance between the back surface 11 of the ceiling surface material 10 and the horizontal furring strips 30 is large. Therefore, it is difficult to fix the horizontal furring strips 30 and the ceiling surface material 10 using the fasteners 50 in the ceiling substructure 200. As a result, it is difficult to ensure sufficient support force from above for the ceiling surface material 10 in the ceiling substructure 200.

[0028] Furthermore, if auxiliary furring strips 40 are not present, the locations where the ceiling panel 10 can be fixed with the fasteners 50 are limited to only the locations where vertical furring strips 20 are present. In the ceiling substructure 200, in order to secure the force supporting the ceiling panel 10 from above, the ceiling panel 10 and the vertical furring strips 20 are fixed together by numerous fasteners 50 along the direction in which the vertical furring strips 20 extend. In this case, as shown in Figure 8B, in the ceiling substructure 200, the fastener heads 51 of the fasteners 50 used to fix the ceiling panel 10 and the vertical furring strips 20 are lined up in a row. That is, the fastener heads 51 are concentrated and numerous in the locations where vertical furring strips 20 are present. Therefore, when the surface 12 of the ceiling panel 10 is viewed from below, the fastener heads 51 become particularly conspicuous. For this reason, the aesthetic appearance of the ceiling panel 10 is easily compromised in the ceiling substructure 200.

[0029] Figures 9A to 9C show other conventional examples.

[0030] Figure 9A shows a ceiling substructure 300 formed by connecting multiple horizontal joists 30 and multiple vertical joists 20. In this ceiling substructure 300, a horizontal joist 30 is provided between each of two adjacent vertical joists 20. In this ceiling substructure 300, a connecting device 21 such as a nail is driven into each point where the horizontal joist 30 and the two vertical joists 20 flanking the horizontal joist 30 meet, thereby connecting the horizontal joist 30 and the vertical joists 20.

[0031] Figure 9B shows a conceptual diagram of the cross-section at the X3-X3 cutting line in Figure 9A, as viewed from the left and right directions. This cross-section is perpendicular to the ceiling surface material 10 on which the ceiling base structure 300 is installed. Figure 9C shows a plan view of a portion of the ceiling base structure 300 as seen from above.

[0032] As described above, this ceiling substructure 300 is formed by connecting vertical joists 20 and horizontal joists 30 with a plurality of connectors 21. The horizontal joists 30 are in contact with the ceiling surface material 10.

[0033] As described above, the ceiling substructure 300 consists of multiple vertical joists 20 and multiple horizontal joists 30 connected by connectors 21. This makes it easier to increase the rigidity of the ceiling substructure 300 and the force supporting the ceiling surface material 10 from above.

[0034] However, in forming the ceiling substructure 300, as shown in Figure 9C, multiple connectors 21 must be nailed in parallel to the ceiling surface material 10 and diagonally intersecting both the direction in which the horizontal joists 30 extend and the direction in which the vertical joists 20 extend. The work of nailing in such connectors 21 requires advanced skills and is difficult to perform due to the unstable posture and line of sight of the worker. In particular, if such nailing work is performed at a height, it is accompanied by difficulties in the work and danger to the worker. For this reason, constructing the ceiling substructure 300 is not easy.

[0035] On the other hand, in the case of the ceiling substrate structure 100 according to this embodiment, as described above, the fasteners 50 are attached to the ceiling substrate structure 10 from the surface 12 side of the ceiling substrate 10 to the portion of the ceiling substrate 10 that overlaps with the auxiliary furring strips 40. As a result, the auxiliary furring strips 40 and the ceiling substrate 10 are fastened together by the fasteners 50. The ceiling substrate 10 and the horizontal furring strips 30 are then fixed together via the auxiliary furring strips 40. For this reason, the fastener heads 52 of the fasteners 50 are also provided in the portion of the ceiling substrate 10 that overlaps with the auxiliary furring strips 40, that is, in portions other than the portion of the ceiling substrate 10 that overlaps with the vertical furring strips 20. As a result, the fastener heads 51 and 52 visible on the surface 12 of the ceiling substrate 10 can be distributed across the entire surface 12 of the ceiling substrate 10. In this case, when the surface 12 of the ceiling panel 10 is viewed from below, the fastener heads 51 and 52 will not be concentrated in the areas of the ceiling panel 10 that overlap with the vertical joists 20, that is, in the areas along the direction in which the vertical joists 20 extend. As a result, the fastener heads 51 and 52 visible on the surface 12 of the ceiling panel 10 will be less conspicuous.

[0036] Furthermore, in the ceiling base structure 100, as described above, the fastener heads 51 and 52 can be distributed across the entire surface 12 of the ceiling panel 10. This makes it easier for the ceiling base structure 100 to support the ceiling panel 10 from above. In this case, compared to the ceiling base structure 200, the number of fasteners 50 used to fix the ceiling panel 10 to the ceiling base structure 100 is less likely to be large. This makes it easier to improve the aesthetic appearance of the surface 12 of the ceiling panel 10.

[0037] Furthermore, in the ceiling substructure 100, the vertical joists 20 and the horizontal joists 30 are easily connected by driving the fasteners 50 from above into the areas where they overlap perpendicularly. For this reason, the ceiling substructure 100 is easier to install compared to the ceiling substructure 300.

[0038] [Differentiation] Modifications 1 to 5 of the ceiling substrate structure 100 according to this embodiment will be described with reference to Figures 3 to 7. Components similar to those in the ceiling substrate structure 100 of Figure 1 are denoted by the same reference numerals and their descriptions are omitted.

[0039] (Variation 1) Modification 1 of the ceiling substrate structure 100 according to this embodiment will be described with reference to Figure 3. Figure 3 shows a conceptual diagram of Modification 1 of the ceiling substrate structure 100 to which the ceiling surface material 10 is attached. Modification 1 is viewed from the surface 12 side of the ceiling surface material 10. Note that Modification 1 is shown as if the ceiling surface material 10 is transparent. To represent this, the ceiling surface material 10 is shown with dashed lines.

[0040] In Modification 1, the horizontal furring strip 30 is provided with one auxiliary furring strip 40 between adjacent vertical furring strips 20. In Modification 1, the shapes of the upper surface 401 and the lower surface 402 of the auxiliary furring strip 40 are identical.

[0041] As shown in Figure 3, the shape of the auxiliary furring strip 40 is, for example, rectangular. In the modified example 1, multiple auxiliary furring strips 40 with different dimensions in the left-right direction are used. If the auxiliary furring strip 40 is rectangular in shape extending in the left-right direction, then when fixing the horizontal furring strip 30 and the ceiling surface material 10 via the auxiliary furring strip 40, two or more fasteners 50 can be used for each auxiliary furring strip 40. In this case, the number of fasteners 50 for the auxiliary furring strip 40 is greater than in Embodiment 1. As a result, the force with which the ceiling base structure 100 supports the ceiling surface material 10 from above is increased.

[0042] Furthermore, in Modification 1, the position of the auxiliary furring strips 40 provided on the horizontal furring strips 30 is not particularly limited, but it is preferable that the distance from the adjacent vertical furring strips 20 flanking the auxiliary furring strips 40 is the same. In this case, when the surface 12 of the ceiling panel 10 is viewed from below, the fastener heads 51 and 52 of the fasteners 50 visible on the surface 12 of the ceiling panel 10 become less conspicuous. In this specification, the distance between the auxiliary furring strips 40 and the vertical furring strips 20 means the shortest distance from the position of the connector 22 attached to the auxiliary furring strips 40 to the vertical furring strips 20.

[0043] (Modification 2) A modified example 2 of the ceiling substrate structure 100 according to this embodiment will be described with reference to Figure 4. Figure 4 shows a conceptual diagram of modified example 2 of the ceiling substrate structure 100 with the ceiling surface material 10 attached. Modified example 2 is viewed from the surface 12 side of the ceiling surface material 10. Note that modified example 2 is shown as if the ceiling surface material 10 were transparent. To represent this, the ceiling surface material 10 is shown with dashed lines.

[0044] In Modification 2, the horizontal furring strip 30 is provided with one auxiliary furring strip 40 between adjacent vertical furring strips 20. As shown in Figure 4, the auxiliary furring strip 40 is present even in areas where the horizontal furring strip 30 does not exist in a plan view. In other words, in Modification 2, the auxiliary furring strip 40 has an extension portion 42 that, when viewed from above, significantly protrudes in the front-rear direction from the gap between the ceiling surface material 10 and the horizontal furring strip 30. This extension portion 42 may extend in either the front-rear direction or the other, with the horizontal furring strip 30 as the boundary. In this case, the auxiliary furring strip 40 has one extension portion 42. Alternatively, this extension portion 42 may extend in both the front-rear direction and the other, with the horizontal furring strip 30 as the boundary. In this case, the auxiliary furring strip 40 has two extension portions 42 that extend in the front-rear direction with the horizontal furring strip 30 as the boundary.

[0045] In the modified example 2, the fastener 50 is attached from the surface 12 side of the ceiling panel 10 to the point where the ceiling panel 10 and the extension 42 of the auxiliary furring strip 40 overlap. The auxiliary furring strip 40 and the ceiling panel 10 are then fastened together by the fastener 50. As a result, the horizontal furring strip 30 and the ceiling panel 10 are fixed together via the auxiliary furring strip 40. Therefore, the fastener head 51 of the fastener 50 that fixes the ceiling panel 10 and the vertical furring strip 20 and the fastener head 52 of the fastener 50 that fixes the ceiling panel 10 and the horizontal furring strip 30 can be located further apart. As a result, when the surface 12 of the ceiling panel 10 is viewed from below, the fastener heads 51 and 52 visible on the surface 12 of the ceiling panel 10 become less conspicuous.

[0046] Furthermore, if the auxiliary furring strip 40 has two extensions 42, fasteners 50 are attached to the surface 12 of the ceiling panel 10 at the points where the ceiling panel 10 and each of the two extensions 42 overlap. The horizontal furring strip 30 and the ceiling panel 10 are then fixed together via the auxiliary furring strip 40. In this case, the ceiling substructure 100 is more likely to provide greater support to the ceiling panel 10 from above.

[0047] In the modified example 2, the shapes of the upper surface 401 and the lower surface 402 of the auxiliary furring strip 40 are identical and are elongated rectangular in shape. The auxiliary furring strip 40 and the vertical furring strip 20 are arranged so that the direction in which the auxiliary furring strip 40 extends is parallel to the direction in which the vertical furring strip 20 extends.

[0048] Furthermore, in the modified example 2, the position of the auxiliary furring strips 40 provided by the horizontal furring strips 30 is not particularly limited, but it is preferable that the distance from the adjacent vertical furring strips 20 flanking the auxiliary furring strips 40 is the same. In this case, when the surface 12 of the ceiling panel 10 is viewed from below, the fastener heads 51 and 52 visible on the surface 12 of the ceiling panel 10 become less conspicuous.

[0049] Furthermore, in the modified example 2, as shown in Figure 4, each of the auxiliary furring strips 40 sandwiched between two adjacent vertical furring strips 20 has only one extension 42, and the extensions 42 of adjacent auxiliary furring strips 40 extend in opposite directions in the front-to-back direction, with the horizontal furring strip 30 as the boundary. In this case, the fixing head 51 of the fixing device 50 that fixes the ceiling panel 10 and the vertical furring strips 20, and the fixing head 52 of the fixing device 50 that fixes the ceiling panel 10 and the horizontal furring strips 30, can be located at particularly far distances from each other. As a result, when the surface 12 of the ceiling panel 10 is viewed from below, the fixing heads 51 and 52 visible on the surface 12 of the ceiling panel 10 become particularly inconspicuous. In this case, the aesthetic appearance of the surface 12 of the ceiling panel 10 is particularly easily improved.

[0050] (Variation 3) Modification 3 of the ceiling substrate structure 100 according to this embodiment will be described with reference to Figure 5. Figure 5 shows a conceptual diagram of Modification 3 of the ceiling substrate structure 100 to which the ceiling surface material 10 is attached. Modification 3 is viewed from the surface 12 side of the ceiling surface material 10. Note that Modification 3 is shown as if the ceiling surface material 10 is transparent. To represent this, the ceiling surface material 10 is shown with dashed lines.

[0051] In the third modification, as shown in Figure 5, the horizontal furring strip 30 has two auxiliary furring strips 40 between two adjacent vertical furring strips 20. The upper surface 401 and lower surface 402 of the auxiliary furring strips 40 are identical and are elongated rectangular in shape. The auxiliary furring strips 40 and the vertical furring strips 20 are arranged side by side such that the direction in which the auxiliary furring strips 40 extend is parallel to the direction in which the vertical furring strips 20 extend. In addition, the auxiliary furring strips 40 are positioned so as to be in contact with the side surfaces of the vertical furring strips 20. As a result, the vertical furring strips 20 are reinforced by the auxiliary furring strips 40, and as a result, the vertical furring strips 20 are less likely to bend or break under the load of the ceiling surface material 10. In particular, the vertical furring strip 201 sandwiched between the two auxiliary furring strips 40 has both sides in the left-right direction in contact with the auxiliary furring strips 40. As a result, the vertical furring strip 201 is particularly easy to reinforce.

[0052] Furthermore, one auxiliary joist 40 has two extensions 42 that protrude from the horizontal joist 30. In the modified example 3, fasteners 50 are attached from the surface 12 side of the ceiling panel 10 to each of the points where the ceiling panel 10 and the two extensions 42 of the auxiliary joist 40 overlap. The auxiliary joist 40 and the ceiling panel 10 are then fastened together by the fasteners 50. In this case, the horizontal joist 30 and the ceiling panel 10 are fixed together via the auxiliary joist 40.

[0053] (Modification 4) Modification 4 of the ceiling substrate structure 100 according to this embodiment will be described with reference to Figure 6. Figure 6 shows a conceptual diagram of Modification 4 of the ceiling substrate structure 100 to which the ceiling surface material 10 is attached. Modification 4 is viewed from the surface 12 side of the ceiling surface material 10. Note that Modification 4 is shown as if the ceiling surface material 10 is transparent. To represent this, the ceiling surface material 10 is shown with dashed lines.

[0054] In Modification 4, the auxiliary furring strip 40 may be one or more between two adjacent vertical furring strips 20. The upper surface 401 and lower surface 402 of the auxiliary furring strip 40 are identical and are elongated rectangular in shape.

[0055] In Modification 4, as shown in Figure 6, the auxiliary furring strip 40 is connected to the horizontal furring strip 30 so as to intersect diagonally with the direction in which the horizontal furring strip 30 extends. That is, in Modification 4, the direction in which the auxiliary furring strip 40 extends is not parallel to the direction in which the vertical furring strip 20 extends. For this reason, in Modification 4, the fixing head 51 of the fixing device 50 that fixes the ceiling panel 10 and the vertical furring strip 20, and the fixing head 52 of the fixing device 50 that fixes the ceiling panel 10 and the horizontal furring strip 30 are particularly easily dispersed. As a result, when the surface 12 of the ceiling panel 10 is viewed from below, the fixing heads 51 and 52 visible on the surface 12 of the ceiling panel 10 are particularly less noticeable. In this case, the aesthetic appearance of the surface 12 of the ceiling panel 10 tends to be particularly improved.

[0056] In modification 4, the auxiliary furring strip 40 has two extensions 42 that protrude from the horizontal furring strip 30. Fixing devices 50 are attached to each of the points where the ceiling panel 10 and the extensions 42 of the auxiliary furring strip 40 overlap, from the surface 12 side of the ceiling panel 10. The auxiliary furring strip 40 and the ceiling panel 10 are then fastened together by the fixing devices 50. In this way, the horizontal furring strip 30 and the ceiling panel 10 are fixed together via the auxiliary furring strip 40. In this case, the force with which the ceiling base structure 100 supports the ceiling panel 10 from above tends to increase.

[0057] (Variation 5) Modification 5 of the ceiling substrate structure 100 according to this embodiment will be described with reference to Figure 7. Figure 7 shows a conceptual diagram of Modification 5 of the ceiling substrate structure 100 to which the ceiling surface material 10 is attached. Modification 5 is viewed from the surface 12 side of the ceiling surface material 10. Note that Modification 5 is shown as if the ceiling surface material 10 is transparent. To represent this, the ceiling surface material 10 is shown with dashed lines.

[0058] In Modification 5, there is an auxiliary furring strip 40 between two adjacent vertical furring strips 20. The auxiliary furring strip 40 intersects the horizontal furring strip 30 diagonally. As a result, the fixing heads 51 of the fasteners 50 that fix the ceiling panel 10 and the vertical furring strips 20, and the fixing heads 52 of the fasteners 50 that fix the ceiling panel 10 and the horizontal furring strips 30 are more easily dispersed. This makes the fixing heads 51 and 52 of the fasteners 50 visible on the surface 12 of the ceiling panel 10 less noticeable when the surface 12 of the ceiling panel 10 is viewed from below. In this case, the aesthetic appearance of the surface 12 of the ceiling panel 10 tends to improve.

[0059] Furthermore, the auxiliary furring strip 40 has two extensions 42 that extend significantly beyond the horizontal furring strip 30. The ends of these extensions 42 of the auxiliary furring strip 40 are in contact with the vertical furring strip 20, as shown in Figure 7. Thus, in Modification 5, each end of the two extensions 42 of the auxiliary furring strip 40 is in contact with each of the two vertical furring strips 20 that sandwich the auxiliary furring strip 40. As a result, the strength of the vertical furring strip 20 is more easily reinforced in Modification 5.

[0060] In modification 5, the auxiliary furring strips 40 and the vertical furring strips 20 may be fastened together by nails or screws driven into the ends of the auxiliary furring strips 40. In other words, the auxiliary furring strips 40 and the vertical furring strips 20 may be fixed together with nails or screws. In this case, the strength of the vertical furring strips 20 can be further reinforced. And the rigidity of the ceiling base structure 100 can be increased.

[0061] In Modification 5, as described above, the end of the extension 42 of the auxiliary furring strip 40 is in contact with the vertical furring strip 20. That is, the shape of the end of the auxiliary furring strip 40 is formed at an acute angle so that it can come into contact with the sides of the two vertical furring strips 20 that sandwich the auxiliary furring strip 40. Therefore, the shape of the upper surface 401 and the lower surface 402 of the auxiliary furring strip 40 is not rectangular, but rather an elongated parallelogram.

[0062] In modification 5, fasteners 50 are attached to each of the overlapping points between the ceiling panel 10 and the extension 42 of the auxiliary furring strip 40, from the surface 12 side of the ceiling panel 10. The auxiliary furring strip 40 and the ceiling panel 10 are then fastened together by the fasteners 50. As a result, the ceiling panel 10 and the horizontal furring strip 30 are fixed together via the auxiliary furring strip 40. In this case, the force with which the ceiling base structure 100 supports the ceiling panel 10 from above is increased.

[0063] In the modified example 5, the fastener 50 can be attached to any location where it overlaps with the two extensions 42 of the auxiliary furring strips 40 of the ceiling panel 10, and the ceiling panel 10 and the horizontal furring strips 30 can be fixed via the auxiliary furring strips 40. By attaching the fastener 50 to a location closer to the vertical furring strips 20 among the overlapping locations of the ceiling panel 10 and the extensions 42 of the auxiliary furring strips 40, the strength of the vertical furring strips 20 is more easily reinforced.

[0064] (Other variations) In the above embodiments and modifications, the horizontal joist 30 and the auxiliary joist 40 are separate components, but the invention is not limited to this, and the two may be integrated as a single unit.

[0065] [summary] The ceiling base structure 100 according to this embodiment is used as a joist to support the ceiling surface material 10 that constitutes the ceiling of a building from above, and is particularly suitable for use as a joist to support the ceiling surface material of the eaves ceiling from above.

[0066] The ceiling substructure 100 according to the first embodiment is a ceiling substructure that supports the ceiling surface material 10 from above. It comprises a plurality of vertical furring strips 20 arranged horizontally at predetermined intervals on the ceiling surface material 10, at least one horizontal furring strip 30, and an auxiliary furring strip 40. The horizontal furring strip 30 is stretched over the plurality of vertical furring strips 20 and fixed to the plurality of vertical furring strips 20. The auxiliary furring strip 40 is fixed to the horizontal furring strip 30 so as to connect the horizontal furring strip 30 with the ceiling surface material 10.

[0067] According to the first embodiment, it is possible to provide a ceiling substrate structure that has good workability and easily improves the appearance and design of the ceiling surface material.

[0068] In the ceiling substrate structure 100 according to the second embodiment, in the first embodiment, the auxiliary furring strips 40 are present even in areas where horizontal furring strips 30 do not exist in a plan view.

[0069] According to the second embodiment, the fixing heads 51 and 52 of the fixing device 50 can be distributed across the entire lower surface of the ceiling material 10, so that the fixing heads 51 and 52 of the fixing device 50 become less conspicuous.

[0070] In the ceiling substrate structure 100 according to the third embodiment, in the first or second embodiment, the auxiliary furring strips 40 are arranged in contact with the vertical furring strips 20.

[0071] According to the third embodiment, the force with which the vertical joists 20 support the ceiling surface material 10 from above is reinforced, and as a result, the force with which the ceiling base structure 100 supports the ceiling surface material 10 from above is increased. [Explanation of Symbols]

[0072] 10 Ceiling materials 20 Vertical veranda 30 Yokono En 40 Auxiliary joists 100 Ceiling substructure

Claims

1. A ceiling substructure that supports the ceiling surface material from above, The ceiling surface material comprises a plurality of vertical furring strips arranged horizontally at predetermined intervals, at least one horizontal furring strip, and auxiliary furring strips. The horizontal joists are stretched over the plurality of vertical joists and fixed to the plurality of vertical joists. The auxiliary furring strips are fixed to the horizontal furring strips so as to connect the horizontal furring strips and the ceiling surface material, and are also present in areas where the horizontal furring strips are not present in a plan view. Ceiling substructure.

2. The auxiliary furring strip is arranged adjacent to the vertical furring strip, The ceiling substrate structure according to claim 1.

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