How to inspect log walls

Abstract

To provide a log material that does not affect structural strength of a log house even if its side face portion sustains natural deterioration and can be repaired as necessary, and an inspection method of a log wall using the log material.SOLUTION: The present invention relates to a log material that is provided with a core material formed by vertically laminating plural pieces of long plate-like laminas and ligneous design materials put on side faces along at least one longer direction of the core material.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention ,B relates to a method for inspecting the log walls of a greenhouse.

Background Art

[0002] The log materials used in log houses may be naturally deteriorated by the influence of wind, rain, sunlight, or organisms (such as decay fungi, termites, etc.) on the outer surface exposed to the external environment, which may affect the structural elements of the log house as a residence.

[0003] Patent Document 1 below discloses a wooden column having a wooden core formed to support the load of a building, a fire-stopping layer disposed along the outer periphery of the wooden core, and a charring layer formed by burning during a fire provided outside thereof.

[0004] Patent Document 2 below discloses a log house wood in which horizontally laminated inner woods are disposed between a pair of outer woods.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Non-Patent Documents

[0006]

Non-Patent Document 1

Summary of the Invention

[0007] In the technology disclosed in Patent Document 2, when increasing the wall thickness due to design requirements, it is necessary to increase the thickness of each horizontally laminated inner timber or increase the number of timbers, or at least one of the two. In such cases, it can be difficult to maintain left-right uniformity of the timber. Page 26 of Non-Patent Document 1 states, "The quality composition of the laminae of adhesive laminates made of the same tree species shall be as follows: (1) The quality composition of the laminae and the thickness of the laminae shall be symmetrical with respect to the central axis in the width direction." When the inner timbers are horizontally laminated, in order to satisfy the requirements of this description, it is necessary to consider the left-right symmetry of the laminae constituting the inner timbers, and it is anticipated that this will be particularly difficult when trying to increase the number of laminae.

[0008] Therefore, the object of the embodiments of this disclosure is to provide log materials that can easily ensure left-right uniformity of the inner portion, do not affect the structural strength of a log house even if the side portion undergoes natural deterioration, and can be repaired as needed, as well as a method for inspecting log walls using such log materials. [Means for solving the problem]

[0009] The log material of the first embodiment of this disclosure comprises a core material formed by vertically stacking a plurality of long, board-shaped laminae, and a wood-based decorative material attached to at least one side of the core material along its longitudinal direction. Preferably, the decorative material is made of sawn veneer. Here, "vertical stacking" means that horizontal laminae are stacked in the vertical direction. In contrast, "horizontal stacking" means that vertical laminae are stacked in the horizontal direction.

[0010] A second embodiment of the present disclosure is a log wall in which the log materials of the first embodiment are stacked, wherein the core material constitutes the structural frame of the log wall and the decorative material serves as a deterioration allowance for the log wall, and the method for inspecting the log wall comprises an inspection step of inspecting the deterioration status of the wall surface of the log wall and a repair step of repairing the decorative material according to the deterioration status.

[0011] In the second embodiment described above, the inspection step preferably includes an identification step of identifying deteriorated areas in the log wall and a determination step of determining whether the depth of the deteriorated area is contained within the design material, and the repair step preferably includes, if the determination step determines that the depth of the deteriorated area is contained within the design material, a removal step of removing a removal area including the deteriorated area, a forming step of forming a repair member that conforms to the removal area, and an inlay step of fitting and fixing the repair member into the area where the removal area was removed. Furthermore, it is even more preferable that the identification step be performed by at least one of visual inspection or tapping, and that the determination step be performed using an inlay resistance measuring instrument. [Effects of the Invention]

[0012] As the embodiments of this disclosure are configured as described above, it is possible to provide log materials that do not affect the structural strength of a log house even if the side portions undergo natural deterioration, and that can be repaired as needed, as well as a method for inspecting log walls using such log materials. [Brief explanation of the drawing]

[0013] [Figure 1] The end face of the core material is shown in the front view. [Figure 2] The core material in Figure 1 is shown in a perspective view. [Figure 3] The end face of the core material with the decorative material attached is shown in a front view. [Figure 4] The core material in Figure 3 is shown in a perspective view. [Figure 5] The end face of the log is shown in a front view. [Figure 6] The log material in Figure 5 is shown in a perspective view. [Figure 7] The log wall composed of laminated logs is shown in a front view. [Figure 8] The log wall in FIG. 7 is shown in a perspective view. [Figure 9] The end face of a log of another form is shown in a front view. [Figure 10] The log in FIG. 9 is shown in a perspective view. [Figure 11] It is a flowchart showing an outline of a method for inspecting a log wall. [Figure 12] It is a flowchart showing an outline of an inspection process in the method for inspecting a log wall. [Figure 13] It is a flowchart showing an outline of a repair process in the method for inspecting a log wall. [Figure 14] It is a cross-sectional view schematically showing an example of a log wall to be subjected to a repair process. [Figure 15] It is a cross-sectional view schematically showing an outline of a removal process in the log wall of FIG. 14. [Figure 16] It is a cross-sectional view schematically showing an outline of a forming process in the log wall of FIG. 14. [Figure 17] It is a cross-sectional view schematically showing an outline of an insertion process in the log wall of FIG. 14.

Embodiments for Carrying Out the Invention

[0014] Embodiments of the present disclosure will be described while referring to the drawings. Note that the core material, log, and log wall shown in the drawings referred to below are schematically represented, and the dimensions, arrangements, and ratios of each part shown therein do not necessarily reflect the actual ones. Also, for the reference numerals commonly attached in each figure, they indicate common members or parts even if not mentioned in the description of each figure.

[0015] (1) Log Figure 1 is a front view of the end face 22 of the core material 20 used in the log material 10 (Figure 5) of this embodiment, and Figure 2 is a perspective view thereof. The core material 20 is formed by vertically stacking multiple long, plate-shaped laminae 21. The laminae 21 are usually bonded together with adhesive. As shown in Figure 2, the side surface 23 of the core material 20 shows a striped pattern due to the vertically stacked laminae 21. The top surface 24 and bottom surface 25 of the core material 20 have protrusions 11 and recesses 12 (see Figures 5 and 6), which will be described later.

[0016] Figure 3 is a front view of the end face 22 of the core material 20 with the decorative material 30 attached to its side surface 23, and Figure 4 is a perspective view thereof. The decorative material 30 is a flat plate made of wood, preferably sawn veneer, and is attached to at least one, preferably both, of the longitudinal side surfaces 23 of the core material 20. The decorative material 30 is usually bonded to the side surfaces 23 of the core material 20 with an adhesive.

[0017] Figure 5 is a front view of the end face 22 of the log material 10 in this embodiment, and Figure 6 is a perspective view thereof. The core material 20 to which the decorative material 30 is attached, as shown in Figures 3 and 4, is cut so that its cross-sectional shape is the end face 22 in Figure 5, resulting in a log material 10 with the shape shown in the perspective view of Figure 6. That is, the top surface 24 of the core material 20 and the upper edge of the decorative material 30 flush with it are cut so that the central portion protrudes upward, thereby forming a protrusion 11 that runs along the longitudinal direction. On the other hand, the bottom surface 25 of the core material 20 and the lower edge of the decorative material 30 flush with it are cut so that the central portion is recessed upward, thereby forming a groove 12 that runs along the longitudinal direction. As shown in Figure 5, the protrusion 11 and the recess 12 have substantially the same cross-sectional shape.

[0018] Figure 7 is a front view of a log wall 40 composed of stacked log members 10, and Figure 8 is a perspective view thereof. As described above, the convex portion 11 and the concave portion 12 have substantially the same cross-sectional shape, so when the log members 10 are stacked vertically, the convex portion 11 of the lower log member 10 fits into the concave portion 12 of the upper log member 10. In this way, the log wall 40 is formed by stacking multiple log members 10. In practice, the log members 10 are fastened together vertically with dowels or through bolts, etc. (not shown).

[0019] Figure 9 shows a front view of the end face 22 of another form of log material 10, and Figure 10 is a perspective view thereof. As shown in these figures, the log material 10 can be formed to any width according to design requirements. This other form of log material 10 can also be stacked vertically to form a log wall 40, as shown in Figures 7 and 8.

[0020] Here, since the core material 20 is composed of multiple laminae 21, even if the individual laminae 21 have relatively low strength, or even if the strength of the individual laminae 21 is not necessarily uniform, there is no problem as long as the core material 20 as a whole, formed by vertically stacking these laminae, has the necessary strength.

[0021] Furthermore, since the log material 10 is visible from the outside, the vertically stacked laminae 21 appear in a striped pattern on the side surface 23 of the core material 20, as described above, which may be aesthetically undesirable. Therefore, the aesthetic appearance of the log material is improved by attaching the decorative material 30 to the side surface 23.

[0022] Furthermore, while the core material 20 of the log material 10 constitutes the structural frame of the log wall 40, the decorative material 30 is not considered in the structural calculations. Therefore, if the log material 10 undergoes natural deterioration, as long as the deteriorated area remains within the decorative material 30 which acts as a buffer, it will not affect the structural strength of the log wall 40 in the structural calculations.

[0023] (2) Method for inspecting log walls Figure 11 is a flowchart illustrating the overview of the inspection method for the log wall 40 in this embodiment. The log wall 40, composed of the log material 10 in this embodiment, is inspected using an inspection method that includes an inspection step S100 for inspecting the deterioration status of the wall surface and a repair step S200 for repairing the decorative material 30 according to the deterioration status. Here, the deterioration status of the wall surface refers to the condition of surface damage or decay.

[0024] Figure 12 is a flowchart outlining the inspection process in the log wall 40 inspection method. In inspection process S100, it is first determined whether a deteriorated area 31 of the log wall 40 can be identified in the identification process in S110. This identification process is performed by at least one of visual inspection or tapping. For example, as shown in the cross-sectional view of Figure 14, if a deteriorated area 31 exists in the decorative material 30 attached to the side surface of the core material 20 formed by multiple laminae 21, the process proceeds to the determination process in S120. On the other hand, if no deteriorated area 31 is identified in the log wall 40, the log wall 40 inspection method of this embodiment is terminated.

[0025] In the determination step S120, it is determined whether the depth of the deteriorated area 31 is confined to the decorative material 30. This determination step S120 can be carried out, for example, by drilling into the deteriorated area 31 and measuring the resistance at that time using an insertion resistance measuring instrument (for example, a resistograph). As shown in Figure 14, if the deteriorated area 31 is confined to the decorative material 30, the process proceeds to the repair step S200. On the other hand, if the deteriorated area 31 is not confined to the decorative material 30 but extends to the core material 20, which is the structural frame, the process proceeds to the stage shown in S300, and it is considered whether further repairs are necessary.

[0026] Figure 13 is a flowchart outlining the repair process in the inspection method for the log wall 40. As shown in the cross-sectional view of Figure 14, if the depth of the deteriorated area 31 is contained within the decorative material 30, the removal process of S210 removes the removal area 32, including the deteriorated area 31, from the decorative material 30, as shown in Figure 15.

[0027] Next, in the forming process of S220, a repair member 33 is formed that conforms to the removal area 32 (see Figure 15), as shown in Figure 16. It is preferable that the repair member 33 be formed from wood of the same tree species as the decorative material 30, but it may also be formed from wood resin or putty.

[0028] Then, in the inlay process of S230, as shown in Figure 17, the repair member 33 is fitted and fixed into the area where the removal range 32 (see Figure 15) was removed, and the repair process is completed. With this, the inspection method for the log wall 40 of this embodiment is completed.

[0029] (3) Effects of the Embodiment As described above, in the log material 10 of this embodiment, the structural frame of the log wall 40 can be constructed by taking into account that the deterioration of the wall surface, which inevitably occurs when using wood, a natural material, will occur in the decorative material 30, which is assumed to have a pre-determined deterioration allowance. In other words, as long as the deteriorated area 31 remains within the decorative material 30, it will not affect the structural strength of the log wall 40.

[0030] Furthermore, since the core material 20 can be formed by laminating the laminae 21, the entire log material 10 can be constructed as laminated timber. For example, when constructing a log house in a cold region, insulation is not used in the walls of the log house, so it is necessary to increase the wall thickness to improve insulation performance. In such cases, with the log material 10 of this embodiment, in which the core material 20 can be formed by vertically laminating the laminae 21, large-section logs can be obtained easily and inexpensively compared to solid wood logs. This makes it easy to improve the insulation performance of the log house by increasing the cross-section of the log material 10. Furthermore, the laminated surface can be covered with the decorative material 30, ensuring an aesthetically pleasing appearance.

[0031] Furthermore, the inspection method for the log wall 40 of this embodiment allows for the identification and repair of deteriorated areas 31 within the decorative material 30, making it possible to maintain the log wall 40 over a long period of time. [Explanation of Symbols]

[0032] 10 Log material 11 Convex part 12 Recess 20 Core material 21 Lamina 22 Edge surface 23 Side view 24 Top view 25 Bottom view 30 Decorative material 31 Deteriorated area 32 Removal area 33 Repair parts 40 log walls

Claims

1. A core material formed by vertically stacking multiple long, plate-shaped laminae, A wooden decorative material attached to at least one side of the core material along its longitudinal direction, A log wall comprising stacked log materials, wherein the core material constitutes the structural frame of the log wall and the decorative material serves as a deterioration allowance for the log wall, and a method for inspecting the log wall, An inspection process for inspecting the deterioration status of the wall surface of the log wall, A repair process for repairing the design material according to the aforementioned deterioration status, It includes, The aforementioned inspection process is, A process for identifying deteriorated areas in the log wall, A determination step of determining whether the depth of the deteriorated area is contained within the design material, It has, The aforementioned repair process is, If, in the determination step, it is determined that the depth of the deteriorated area is contained within the design material, a removal step is performed to remove the removal area including the deteriorated area. A forming step of forming a repair member that conforms to the removal range, The process involves inlaying the repair member into the area where the removal range was removed and securing it in place. A method for inspecting log walls, which includes the following.

2. The method for inspecting a log wall according to claim 1, wherein the design material is formed from sawn board.

3. The aforementioned specific step is carried out by at least one of visual inspection or percussion, The method for inspecting a log wall according to claim 1 or claim 2, wherein the determination step is performed using an insertion resistance measuring instrument.