Wood column installation structure and wood column installation method

Abstract

To provide a wooden pole installation structure capable of installing a wooden pole on foundation concrete while securing an installation strength without forming an engaging groove that opens radially outward in the wooden pole and enabling replacement of installed wooden poles without destroying the foundation concrete.SOLUTION: The wooden pole installation structure of the present invention includes: a wooden pole erected in an installation hole of foundation concrete; rigid protrusions and recesses respectively provided on a bottom surface of the installation hole and a base end surface of the wooden pole; and a plurality of rigid elongated members installed in a gap between an outer peripheral surface of the wooden pole and an inner peripheral surface of the installation hole so as to be arranged in a circumferential direction of the wooden pole with a longitudinal direction along the longitudinal direction of the wooden pole. The plurality of elongated members include a plurality of plate-shaped compressed lumbers with a plate thickness direction used as an expansion direction. The plurality of compressed lumbers are arranged in the circumferential direction of the wooden pole in a state where one side and the other side in the plate thickness direction are in contact with the outer peripheral surface of the wooden pole and the inner peripheral surface of the installation hole, respectively.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wooden pillar installation structure and a wooden pillar installation method applicable to wooden pillars used for torii gates, large black pillars of houses, self-standing pillar structures, lanterns, and the like.

Background Art

[0002] The applicant of the present application has previously filed an application for an invention related to a wooden pillar installation structure and obtained a patent (see Patent Document 1 below).

[0003] The invention described in Patent Document 1 (hereinafter referred to as the patented invention) has a support device and a wooden pillar supported in an upright state by the support device.

[0004] The support device has a base plate fixed to the foundation concrete, a support cylinder fixed to the base plate, and a convex portion provided in a region surrounded by the support cylinder on the upper surface of the base plate.

[0005] The wooden pillar is provided with a concave portion corresponding to the convex portion on the base end surface, and the outer periphery of the base end portion is covered with a protective cover. The protective cover has a cylindrical portion surrounding the base end portion of the wooden pillar and a wooden pillar side flange portion extending radially outward from a portion of the cylindrical portion located within the support cylinder in the upright state of the wooden pillar.

[0006] The support cylinder has a cylindrical support cylinder body and a support cylinder side flange portion extending radially inward from the support cylinder body. Among the gaps between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the support cylinder body, at least in the vertical direction, a fixing material is filled in a region sandwiched by the support cylinder side flange portion and the wooden pillar side flange portion.

[0007] The above-mentioned patented invention is useful in that even when a wooden post is installed alone or when there are only a few wooden posts to be installed, the wooden post can be installed while effectively ensuring the installation strength on the foundation concrete, and further, the installed wooden post can be replaced without destroying the foundation concrete.

[0008] However, in the above-mentioned patented invention, there was a problem that an engaging groove opening radially outward had to be formed in the wooden post, and it could not be applied to thin wooden posts.

[0009] That is, in the above-mentioned patented invention, an engaging groove opening radially outward is provided at the base end portion of the wooden post surrounded by the cylindrical portion. A rigid member is attached to the engaging groove so as not to be relatively movable in the longitudinal direction of the wooden post.

[0010] On the other hand, a mounting hole is provided in the cylindrical portion at a position facing the rigid member, and the cylindrical portion and the vertical wooden post are connected via a fastening member inserted through the mounting hole and fastened to the rigid member.

[0011] Therefore, the wooden post to be erected requires a diameter such that the strength can be ensured even if the engaging groove is formed.

Prior Art Documents

Patent Documents

[0012]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0013] The present invention has been made in view of such prior art, and even when a wooden column is installed alone or when there are a small number of wooden columns to be installed, without forming an engaging groove that opens radially outward in the wooden column, the wooden column can be installed on the foundation concrete while ensuring the installation strength, and further, it is an object to provide a wooden column installation structure and a wooden column installation method that enable replacement of the installed wooden column without destroying the foundation concrete.

Means for Solving the Problems

[0014] To achieve the above object, the present invention Akira includes a formwork member having a cylindrical side plate and a rigid bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate, a support member that supports the formwork member on a reference surface such that the upper end opening of the cylindrical side plate faces upward, foundation concrete placed on the reference surface so as to cover the outer periphery of the cylindrical side plate, a wooden column in which at least a lower region located within the formwork member has a smaller diameter than an installation hole defined by the cylindrical side plate, and a rigid convex portion and a concave portion provided directly or indirectly on one and the other of a placement surface region surrounded by the cylindrical side plate of the bottom plate and the base end surface of the wooden column, respectively, and the rigid convex portion is engaged with the concave portion and the base end surface of the wooden column is placed on the bottom plate plate such that a gap exists over the entire circumference of the wooden column between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, and a plurality of rigid long members inserted into the gap so as to be arranged in the circumferential direction of the wooden column with the longitudinal direction along the longitudinal direction of the wooden column and the inner side and the outer side in the radial direction with respect to the wooden column being in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, respectively, wherein the plurality of rigid long members include a plurality of plate-shaped compressed woods having a plate thickness direction as an expansion direction, and the plurality of compressed woods are arranged in the circumferential direction of the wooden column with one side and the other side in the plate thickness direction being in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, respectively and the support member is configured to be able to change the installation height of the bottom plate with respect to the reference plane. The support member includes a plurality of bolt members engaged with bolt through-holes formed in the placement surface area of the bottom plate in a state where the base end portion is placed on the reference plane, and a plurality of nut members that support the bottom plate in a state of being screwed to each of the plurality of bolt members. The upper end surfaces of the plurality of bolt members are flush with the upper surface of the bottom plate to provide a wooden column installation structure.

[0015] Also, in order to achieve the above object, the present invention provides a formwork member having a cylindrical side plate and a rigid bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate, a support member that supports the formwork member on a reference plane with the upper end opening of the cylindrical side plate facing upward, a foundation concrete placed on the reference plane so as to cover the outer periphery of the cylindrical side plate, a wooden pillar having a lower region located at least within the formwork member with a diameter smaller than that of an installation hole defined by the cylindrical side plate, and rigid convex portions and concave portions provided directly or indirectly on one and the other of the placement surface area surrounded by the cylindrical side plate of the bottom plate and the base end surface of the wooden pillar, respectively. The rigid convex portions and concave portions are positioned such that a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden pillar and the inner peripheral surface of the installation hole in a state where the base end surface of the wooden pillar is placed on the bottom plate while engaging the rigid convex portions with the concave portions. The rigid convex portions and concave portions are positioned such that a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden pillar and the inner peripheral surface of the installation hole in a state where the base end surface of the wooden pillar is placed on the bottom plate while engaging the rigid convex portions with the concave portions. A plurality of rigid long members are inserted into the gap so as to be arranged in the circumferential direction of the wooden pillar in a state where the longitudinal direction is along the longitudinal direction of the wooden pillar and the inner and outer sides with respect to the radial direction with respect to the wooden pillar are respectively in contact with the outer peripheral surface of the lower region of the wooden pillar and the inner peripheral surface of the installation hole. The plurality of rigid long members include a plurality of plate-shaped compressed woods with the plate thickness direction as the expansion direction. The plurality of compressed woods are arranged in the circumferential direction of the wooden pillar in a state where one side and the other side in the plate thickness direction are respectively in contact with the outer peripheral surface of the lower region of the wooden pillar and the inner peripheral surface of the installation hole The rigid convex portion is formed by an upper portion of a rigid member fixed to the bottom plate so as to penetrate the placement surface area vertically, and a lower portion of the rigid member extending downward from the bottom plate is embedded in the foundation concrete. In this case, the concave portion is provided on the base end surface of the wooden column so that the upper portion of the rigid member can be engaged therewith.

[0016] Also, To achieve the above object, the present invention Akira , a support plate, a support member that horizontally supports the support plate on a reference surface, a rigid member fixed to the support plate so as to form a rigid convex portion extending upward from the support plate, a cylindrical side plate, and a rigid bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate, and the upper end opening of the cylindrical side plate faces upward. A formwork member directly or indirectly supported by the support plate, wherein a through hole through which the rigid convex portion penetrates is provided in the bottom plate, a foundation concrete placed on the reference surface so as to cover the outer periphery of the cylindrical side plate, and at least a lower region located within the formwork member is smaller in diameter than an installation hole defined by the cylindrical side plate, and a concave portion into which the rigid convex portion is engaged is provided on the base end surface. A wooden column, in a state where the base end surface of the wooden column is placed on the bottom plate while engaging the rigid convex portion with the concave portion, a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A wooden column configured as such, and a plurality of rigid long members inserted into the gap so as to be arranged in the circumferential direction of the wooden column with the longitudinal direction along the longitudinal direction of the wooden column and the inner side and the outer side in the radial direction with respect to the wooden column being in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, respectively. The plurality of rigid long members include a plurality of plate-shaped compressed woods having a plate thickness direction as an expansion direction, and the plurality of compressed woods are arranged in the circumferential direction of the wooden column in a state where one side and the other side in the plate thickness direction are in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, respectively. A wooden column installation structure is provided.

[0017] No. In one example, in a state before placing the foundation concrete, the formwork member is detachably placed upward on the upper surface of the support plate.

[0018] No. In the second example, the wooden pillar installation structure is provided with an auxiliary plate fixed to the rigid member at a position spaced upward from the support plate, and in a state before placing the foundation concrete, the formwork member is detachably placed upward on the upper surface of the auxiliary plate.

[0019] No. In the third example, the formwork member is fixed to the rigid member at a position spaced upward from the support plate.

[0020] Also, To achieve the above object, the present invention Akira a support plate provided with a rigid convex portion extending upward, a support member horizontally supporting the support plate on a reference surface, a foundation concrete placed on the reference surface so as to cover the support plate while having an installation hole opening upward, and the rigid convex portion protruding upward from the bottom surface of the installation hole, and a wooden pillar having a lower region located at least in the installation hole having a smaller diameter than the installation hole and a recess provided in a base end surface into which the rigid convex portion is engaged, and the base end surface of the wooden pillar is placed on the bottom surface while engaging the rigid convex portion with the recess, a wooden pillar configured such that a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden pillar and the inner peripheral surface of the installation hole, and a plurality of rigid long members inserted into the gap so as to be arranged in the circumferential direction of the wooden pillar with the longitudinal direction along the longitudinal direction of the wooden pillar and the inner side and the outer side in the radial direction with respect to the wooden pillar being in contact with the outer peripheral surface of the lower region of the wooden pillar and the inner peripheral surface of the installation hole, respectively. The plurality of rigid long members include a plurality of plate-shaped compressed woods having a plate thickness direction as an expansion direction, and the plurality of compressed woods are arranged in the circumferential direction of the wooden pillar in a state where one side and the other side in the plate thickness direction are in contact with the outer peripheral surface of the lower region of the wooden pillar and the inner peripheral surface of the installation hole, respectively, to provide a wooden pillar installation structure.

[0021] In the various configurations described above The rigidity long member is configured such that its upper end terminates below the upper end of the installation hole. In this case, a filler is filled in the portion of the gap above the upper end of the rigidity long member. The filler can be, for example, mortar, grout (non-shrinking mortar), or an adhesive.

[0022] In species described each of the various configurations, preferably, the plurality of rigidity long members may include a plurality of members with unchanging outer dimensions. The plurality of members with unchanging outer dimensions are spaced apart in the circumferential direction of the wooden post. Among the gaps, between adjacent members with unchanging outer dimensions with respect to the circumferential direction of the wooden post, the plurality of compressed wood members are arranged in the circumferential direction. More preferably, the plurality of members with unchanging outer dimensions are arranged at equal intervals in the circumferential direction of the wooden post.

[0023] In species described each of the various configurations, preferably, the wooden post installation structure can have a plate-like rigid body wound around the wooden post so that at least a part thereof is located within the installation hole.

[0024] More preferably, the plate-like rigid body is wound around the wooden post so that at least a part thereof faces the compressed wood.

[0025] Also, in the present invention Akira A first placing step of placing first base concrete on a reference surface with an insertion hole that opens upward, a rigid member installation step of inserting a lower portion of a rigid member into the insertion hole so that an upper portion extends upward to form a rigid convex portion, a second placing step of placing second base concrete having an installation hole that opens upward and is formed so that the rigid convex portion protrudes upward from a bottom surface on the first base concrete, and a lower region at least located in the installation hole having a smaller diameter than the installation hole and a recess into which the rigid convex portion is engaged provided on a base end surface, inserting a wooden column into the installation hole, placing the base end surface of the wooden column on the bottom surface of the installation hole while engaging the rigid convex portion with the recess, and standing the wooden column in the installation hole in a state where a gap exists over the entire circumference between an outer peripheral surface of the lower region of the wooden column and an inner peripheral surface of the installation hole, and a long member installation step of inserting a plurality of rigid long members into the gap so as to be arranged around the lower region of the wooden column in a state where a longitudinal direction is along the longitudinal direction of the wooden column, the plurality of long members include a plurality of plate-shaped compressed woods in which a plate thickness direction is an expansion direction, and the long member installation step is configured to arrange the plurality of plate-shaped compressed woods around the lower region of the wooden column in a state where one side and the other side in the plate thickness direction of the plurality of plate-shaped compressed woods are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A wooden column installation method is provided.

[0026] Also, the present invention Akira、 having a cylindrical side plate and a bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate, and a rigid convex portion protruding upward is provided in the placement surface area surrounded by the cylindrical side plate on the bottom plate. A formwork member installation step of installing the formwork member on a reference surface using a support member; inserting a wooden column having a diameter smaller than that of the installation hole defined by the cylindrical side plate at least in the lower region and having a recess on the base end surface into which the rigid convex portion is engaged into the installation hole, and while engaging the rigid convex portion into the recess, placing the base end surface of the wooden column on the bottom plate, and standing the wooden column on the bottom plate in the installation hole with a gap existing over the entire circumference between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole; a long member installation step of inserting a plurality of rigid long members into the gap so as to be arranged around the lower region of the wooden column with the longitudinal direction along the longitudinal direction of the wooden column; and a placing step of placing foundation concrete on the reference surface so as to cover the outer circumference of the cylindrical side plate at an arbitrary timing after the formwork member installation step. The plurality of long members include a plurality of plate-shaped compressed woods with the plate thickness direction as the expansion direction, and the long member installation step is configured to arrange the plurality of plate-shaped compressed woods around the lower region of the wooden column with one side and the other side of the plate thickness direction of the plurality of plate-shaped compressed woods respectively contacting the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole The support member has a plurality of bolt members engaged with bolt through-holes formed in the placement surface area with the base end portions placed on the reference surface, and a plurality of nut members that support the bottom plate while being screwed to each of the plurality of bolt members. The installation height of the bottom plate from the reference surface can be changed, and a bolt cutting process is provided for cutting and removing portions of the plurality of bolt members that extend upward from the bottom plate after the formwork member installation process and before the wooden pillar erection process. to provide a method for installing a wooden column as described above.

[0027] Also, in the present invention Ming is、 having a cylindrical side plate and a bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate, and a rigid convex portion protruding upward is provided in the placement surface area surrounded by the cylindrical side plate of the bottom plate. A formwork member installation step of installing the formwork member on a reference surface using a support member; a placing step of placing a foundation concrete on the reference surface so as to cover the outer periphery of the cylindrical side plate; and removing the cylindrical side plate. A side plate removing step of forming an installation hole that opens upward in the foundation concrete; inserting a wooden column provided with a concave portion having a lower region located at least in the installation hole having a smaller diameter than the installation hole and the rigid convex portion engaged with the base end surface into the installation hole, and while engaging the rigid convex portion with the concave portion, placing the base end surface of the wooden column on the bottom plate, and erecting the wooden column on the bottom plate in the installation hole in a state where a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole; and a long member installation step of inserting a plurality of rigid long members into the gap so as to be arranged around the lower region of the wooden column in a state where the longitudinal direction is along the longitudinal direction of the wooden column. The plurality of long members include a plurality of plate-shaped compressed woods whose plate thickness direction is the expansion direction, and the long member installation step is configured to arrange the plurality of plate-shaped compressed woods around the lower region of the wooden column in a state where one side and the other side in the plate thickness direction of the plurality of plate-shaped compressed woods are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A wooden column installation method is provided.

[0028] Good Alternatively, the support member has a plurality of bolt members engaged with bolt through holes formed in the bottom plate in a state where the base end portion is placed on the reference surface, and a plurality of nut members that support the bottom plate in a state of being screwed to each of the plurality of bolt members, and the installation height of the bottom plate from the reference surface can be changed.

[0029] For example, the bottom plate may be configured to have an extending surface area that extends outward in the radial direction with respect to the wooden column from the placement surface area, the bolt through holes are formed in the extending surface area, and the plurality of bolt members may be configured to penetrate the extending surface area vertically.

[0030] Alternatively, it is also possible to form the bolt through-holes through which the plurality of bolt members are inserted in the placement surface area. In this case, the wooden column installation method includes a bolt cutting step of cutting and removing a portion of the plurality of bolt members that extends upward from the bottom plate after the formwork member installation step and before the wooden column Erect step.

[0031] Also, the present invention Ming is includes a support plate installation step of installing a support plate to which a rigid member is fixed so as to extend upward at least partially on a reference plane using a support member, a first placing step of placing first foundation concrete on the reference plane so that an upper portion of the rigid member protrudes upward to form a rigid convex portion while covering the support plate, a second placing step of placing second foundation concrete having an installation hole that opens upward and is formed so that the rigid convex portion protrudes upward from a bottom surface on the first foundation concrete, a wooden column standing step of inserting a wooden column having a lower region with a smaller diameter than the installation hole and a recess provided at a base end surface into which the rigid convex portion is engaged into the installation hole, placing the base end surface of the wooden column on the bottom surface while engaging the rigid convex portion into the recess, and standing the wooden column in the installation hole with a gap existing over the entire circumference between an outer peripheral surface of the lower region of the wooden column and an inner peripheral surface of the installation hole, and a long member installation step of inserting a plurality of rigid long members into the gap so as to be arranged around the lower region of the wooden column in a state where a longitudinal direction is along the longitudinal direction of the wooden column. The plurality of long members include a plurality of plate-shaped compressed woods in which a plate thickness direction is an expansion direction, and the long member installation step is configured to arrange the plurality of plate-shaped compressed woods around the lower region of the wooden column in a state where one side and the other side in the plate thickness direction of the plurality of plate-shaped compressed woods are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A wooden column installation method is provided.

[0032] Good Preferably, the plurality of long members include, in addition to the plurality of plate-shaped compressed woods, a plurality of outer shape invariant members having invariant outer dimensions. In this case, the long member installation step includes an outer shape invariant member installation process for installing the plurality of outer shape invariant members, and a compressed wood installation process for installing the plurality of plate-shaped compressed woods after the outer shape invariant member installation process.

[0033] The outer shape invariant member installation process is configured such that the inner side and the outer side in the radial direction with respect to the wooden column in the plurality of outer shape invariant members are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, and the plurality of outer shape invariant members are spaced apart from each other in the circumferential direction of the wooden column.

[0034] The compressed wood installation process is configured such that one side and the other side in the plate thickness direction of the plate-shaped compressed wood are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, and the plurality of plate-shaped compressed woods are arranged around the wooden column in the region between the adjacent outer shape invariant members in the circumferential direction among the gaps.

[0035] Good Alternatively, the wooden column installation method may include a moisture impregnation process of impregnating the plurality of plate-shaped compressed woods with moisture after the long member installation step.

Advantages of the Invention

[0036] According to the present invention, even when a wooden column is installed alone or when the number of installed wooden columns is small, it is possible to install the wooden column on the foundation concrete while ensuring the installation strength without forming an engaging groove that opens radially outward in the wooden column, and further, it is possible to replace the installed wooden column without destroying the foundation concrete.

Brief Description of the Drawings

[0037]

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DETAILED DESCRIPTION OF THE INVENTION

[0038] Embodiment 1 Hereinafter, an embodiment of a wooden post installation structure according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a longitudinal sectional view of a wooden post installation structure 1A according to the present embodiment. Also, FIGS. 2 and 3 show sectional views taken along line II-II in FIG. 1 and line III-III in FIG. 2, respectively.

[0039] The wooden post installation structure 1A is configured to erect a wooden post on the foundation concrete.

[0040] Specifically, as shown in FIGS. 1 to 3, the wooden post installation structure includes a foundation concrete 10 in which an installation hole 90 that opens upward is formed, a wooden post 20 erected in the installation hole 90, and a rigid convex portion 30 and a concave portion 40 provided directly or indirectly on one and the other of the bottom surface of the installation hole 90 and the base end surface of the wooden post 20, respectively.

[0041] At least the lower region 22 of the wooden post 20 located within the installation hole 90 has a smaller diameter than the installation hole 90. That is, in a state where the wooden post 20 is erected in the installation hole 90, a gap 95 exists over the entire circumference between the outer peripheral surface of the lower region 22 of the wooden post 20 and the inner peripheral surface of the installation hole 90.

[0042] In the present embodiment, as shown in FIG. 1 and the like, the rigid convex portion 30 is provided on the bottom surface of the installation hole 90, and the concave portion 40 is provided on the base end surface of the wooden column 20.

[0043] The rigid convex portion 30 and the concave portion 40 are positioned such that, when the base end surface of the wooden column 20 is placed on the bottom surface of the installation hole 90 while engaging the rigid convex portion 30 with the concave portion 40, a gap 95 exists over the entire circumference between the outer peripheral surface of the lower region 22 of the wooden column 20 and the inner peripheral surface of the installation hole 90. In the present embodiment, as shown in FIG. 2 and the like, the rigid convex portion 30 is provided at the center of the installation hole 90, and the concave portion 40 is provided on the central axis of the wooden column 20.

[0044] The rigid convex portion 30 is formed of a member having a predetermined rigidity such as stainless steel. In the present embodiment, as shown in FIG. 1 and the like, the rigid convex portion 30 is formed by the upper portion of a rigid member 35 such as stainless steel whose upper portion extends upward from the bottom surface of the installation hole 90 and whose lower portion is buried in the foundation concrete 10.

[0045] The wooden column installation structure 1A further has a plurality of rigid long members 50 inserted into the gap 95 so as to be arranged along the circumferential direction around the lower region 22 of the wooden column 20.

[0046] FIG. 4 shows a perspective view of the wooden column 20 and the plurality of rigid long members 50. As shown in FIGS. 1 to 4, the plurality of rigid long members 50 are inserted into the gap 95 so as to be arranged in the circumferential direction of the wooden column 20 with their longitudinal directions along the longitudinal direction of the wooden column 20 and with the inner and outer sides in the radial direction with respect to the wooden column 20 being in contact with the outer peripheral surface of the lower region 22 of the wooden column 20 and the inner peripheral surface of the installation hole 90, respectively. As shown in FIG. 2, in the present embodiment, 24 of the rigid long members 50 are arranged in the circumferential direction of the wooden column 20.

[0047] The plurality of long members 50 includes a plurality of plate-shaped compressed woods 52 whose thickness direction is the expansion direction. The plurality of compressed woods 52 are arranged in the circumferential direction of the wooden column 20 in a state where one side and the other side in the thickness direction are respectively in contact with the outer peripheral surface of the lower region 22 of the wooden column 20 and the inner peripheral surface of the installation hole 90.

[0048] The compressed wood 52 can be formed, for example, by densifying a plate-shaped wood of a desired shape at a temperature of 90° C. for a sufficient time in a sealed environment. Alternatively, the compressed wood 52 can also be formed by densifying a plate-shaped wood of a desired shape at 110° C. to 130° C. in an open environment. According to such a forming method, the compressed wood having a deformation recovery function can be efficiently formed without impairing the structural strength.

[0049] According to the wooden column installation structure 1A having such a configuration, the wooden column 20 can be firmly erected and supported in the installation hole 90 by the expansion action of the plurality of compressed woods 52 with the radial position of the wooden column 20 with respect to the installation hole 90 fixed to a desired position by the rigid convex portion 30 and the concave portion 40.

[0050] Furthermore, since there is no need to form an engaging groove that opens radially outward in the wooden column 20, it can be effectively applied to a small-diameter wooden column 20 as well. Also, by removing one or a plurality of the compressed woods 52, the wooden column 20 can be removed from the foundation concrete 10 without destroying the foundation concrete 10.

[0051] As shown in FIGS. 1 to 4, in the present embodiment, a part of the plurality of long members 50 is a plurality of outer shape invariant members 55 whose outer dimensions are made invariant. That is, in the present embodiment, the plurality of long members 50 includes the plurality of plate-shaped compressed woods 52 and the plurality of outer shape invariant members 55.

[0052] The outer shape invariant member 55 is formed of a material with an invariant outer dimension, such as stainless steel, iron, or reinforced plastic.

[0053] As shown in FIGS. 2 and 4, the plurality of outer shape invariant members 55 are spaced apart in the circumferential direction of the wooden pillar 20, and among the gaps 95, between the adjacent outer shape invariant members 55 with respect to the circumferential direction of the wooden pillar 20, the plurality of compressed woods 52 are arranged in the circumferential direction.

[0054] In this way, by providing the plurality of outer shape invariant members 55 spaced apart in the circumferential direction, the radial width of the gap 95 can be made the same or substantially the same over the entire circumference of the wooden pillar 20, and a good standing posture of the wooden pillar 20 can be obtained.

[0055] Preferably, the plurality of outer shape invariant members 55 are arranged at equal intervals in the circumferential direction of the wooden pillar 20. As shown in FIG. 2, in this embodiment, four of the outer shape invariant members 55 are arranged at 90-degree intervals in the circumferential direction of the wooden pillar 20. Naturally, it is also possible to arrange a different number of the outer shape invariant members 55, such as two or three, at equal intervals in the circumferential direction of the wooden pillar 20.

[0056] Of course, it is also possible to make all of the plurality of long members 50 the plurality of plate-shaped compressed woods 52.

[0057] Hereinafter, a manufacturing method (wooden pillar installation method) of the wooden pillar installation structure will be described. The wooden pillar installation method includes a placing step of placing the foundation concrete 10 so as to have an installation hole 90 that opens upward and a rigid convex portion 30 that protrudes upward is provided on the bottom surface of the installation hole 90.

[0058] In this embodiment, the placing process includes a first placing process (FIG. 5(a)) of placing the first foundation concrete 10(1) with a predetermined thickness on a reference surface 12 (for example, the upper surface of the waste concrete) so that there is an insertion hole 36 that opens upward and into which the lower part of the rigid member 35 can be inserted; a rigid member installation process (FIG. 5(a)) of inserting the lower part of the rigid member 35 into the insertion hole 36 so that the upper part extends upward to form the rigid convex part 30; and a second placing process (FIG. 5(b)) of placing the second foundation concrete 10(2) having the installation hole 90 formed so as to open upward and the rigid convex part 30 protruding upward from the bottom surface on the upper surface of the first foundation concrete 10(1). In addition, when there is a gap between the lower part of the rigid member 35 and the insertion hole 36, a filler such as mortar can be filled therein. Further, the installation hole 90 can be efficiently formed, for example, by placing the second foundation concrete 20 in a state where a spacer (not shown) having a size corresponding to the installation hole 90 is placed on the first foundation concrete 10 and then removing the spacer.

[0059] The wooden column installation method further includes a wooden column erection process. FIG. 6 shows a longitudinal sectional view of the wooden column installation structure 1A after the wooden column erection process. Also, FIG. 7 shows a sectional view taken along line VII-VII in FIG. 6.

[0060] As shown in FIGS. 5 to 7, the wooden column erection process is configured to insert a wooden column 20 provided with a concave portion 40 in at least a lower region 22 located in the installation hole 90 having a smaller diameter than the installation hole 90 and into which the rigid convex portion 30 is engaged at the base end surface into the installation hole 90, engage the rigid convex portion 30 with the concave portion 40, place the base end surface of the wooden column 20 on the bottom surface of the installation hole 90, and erect the wooden column 20 in the installation hole 90 with a gap 95 existing over the entire circumference between the outer peripheral surface of the lower region 22 of the wooden column 20 and the inner peripheral surface of the installation hole 90.

[0061] After the step of standing the wooden posts, the method for installing the wooden posts includes a step of installing the plurality of rigid long members 50 into the gap 95 so as to be arranged around the lower region 22 of the wooden post 20 in a state where the longitudinal direction is along the longitudinal direction of the wooden post 20.

[0062] As described above, in the present embodiment, the plurality of long members 50 include the plurality of compressed woods 52 and the plurality of outer shape invariant members 55.

[0063] In this case, the step of installing the long members includes an outer shape invariant member installation process of installing the plurality of outer shape invariant members 55, and a compressed wood installation process of installing the plurality of plate-shaped compressed woods 52 after the outer shape invariant member installation process.

[0064] FIG. 8 shows a longitudinal sectional view of the wooden post installation structure 1A after the outer shape invariant member installation process. Further, FIG. 9 shows a sectional view taken along line IX-IX in FIG. 8.

[0065] As shown in FIG. 9, the outer shape invariant member installation process is configured such that the plurality of outer shape invariant members 55 are spaced apart from each other in the circumferential direction of the wooden post 20 in a state where the inner side and the outer side in the radial direction with respect to the wooden post 20 in the plurality of outer shape invariant members 55 are respectively in contact with the outer peripheral surface of the lower region 22 of the wooden post 20 and the inner peripheral surface of the installation hole 90.

[0066] In the present embodiment, the plurality of outer shape invariant members 55 are arranged at equal intervals in the circumferential direction of the wooden post 20.

[0067] The outer shape invariant member 55 is formed of a material whose outer shape does not deform, such as stainless steel, iron, or reinforced plastic. Therefore, in the state after the outer shape invariant member installation process, the radial distance of the gap 95 between the outer peripheral surface of the lower region 22 of the wooden post 20 and the inner peripheral surface of the installation hole 90 is the same or substantially the same over the entire circumference of the wooden post 20.

[0068] The compression wood installation process is configured to arrange the plurality of plate-shaped compression members 52 around the wooden column 20 in a region between the adjacent outer shape invariant members 55 in the circumferential direction within the gap 95, with one side and the other side in the plate thickness direction of the plate-shaped compression wood 52 being in contact with the outer peripheral surface of the lower region 22 of the wooden column and the inner peripheral surface of the installation hole 90, respectively. As a result, the state shown in FIG. 2 appears.

[0069] In this embodiment, the longitudinal length of the plurality of long members 50 is the same as the depth of the installation hole 90. That is, as shown in FIGS. 1 and 3, the upper ends of the plurality of long members 50 are positioned substantially at the same level as the upper surface of the foundation concrete 10.

[0070] Instead of the long member 50, it is also possible to use a long member 50' (plate-shaped compression wood 52' and outer shape invariant member 55') having a longitudinal length shorter than the depth of the installation hole.

[0071] FIGS. 10 and 11 show longitudinal sectional views of the wooden column installation structure 1B according to a modified example using the long member 50'. FIGS. 10 and 11 respectively correspond to FIGS. 1 and 3. In FIGS. 10 and 11, the same members as those in this embodiment are denoted by the same reference numerals.

[0072] As shown in FIGS. 10 and 11, in the wooden column installation structure 1B, the upper end of the long member 50' ends below the upper end of the installation hole 90, and the filling material 60 is filled in the portion of the gap 95 above the upper end of the long member 50'. As the filling material 60, for example, mortar, grout (non-shrinking mortar), or an adhesive can be used.

[0073] In such a modified example, when a large impact force is applied to the wooden column 20 due to an earthquake or the like after installation, the filling material 60 will be damaged at a position corresponding to the direction of the impact force. Therefore, the damaged portion of the filler 60 can appropriately identify the long member 50' that has received an impact, and the replacement or repair of the long member 50' can be efficiently performed.

[0074] Embodiment 2 Hereinafter, the wooden column installation structure 2A according to another embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 12 shows a longitudinal sectional view of the wooden column installation structure 2A according to the present embodiment. Further, FIG. 13 shows a sectional view taken along line XIII-XIII in FIG. 12. In the drawings, the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0075] The wooden column installation structure 2A according to the present embodiment is mainly different from the wooden column installation structure 1A according to the first embodiment in that it has a formwork member 100.

[0076] That is, the wooden column installation structure 2A includes the formwork member 100, a support member 150 that supports the formwork member 100 on the reference plane 12, the foundation concrete 10, the wooden column 20, the rigid convex portion 30 and the concave portion 40, and the plurality of rigid long members 50.

[0077] As shown in FIGS. 12 and 13, the formwork member 100 includes a cylindrical side plate 110 and a rigid bottom plate 120 connected to the cylindrical side plate 110 so as to close the lower end opening of the cylindrical side plate 110.

[0078] The bottom plate 120 is formed of, for example, stainless steel or iron. The cylindrical side plate 110 is formed of, for example, stainless steel, iron, or plastic.

[0079] In the present embodiment, the installation hole 90 for the wooden column 20 is formed by the cylindrical side plate 110 and the bottom plate 120. That is, the inner peripheral surface of the cylindrical side plate 110 forms the inner peripheral surface of the installation hole 90, and the placement surface area 122 surrounded by the cylindrical side plate 110 on the upper surface of the bottom plate 120 forms the bottom surface of the installation hole 90.

[0080] The support member 150 supports the formwork member 100 on a reference surface 12 (for example, the upper surface of the discarded concrete) where the foundation concrete 10 is placed, such that the upper end opening of the cylindrical side plate 110 faces upward. In the present embodiment, the support member 150 is configured to be able to change the installation height of the bottom plate 120 with respect to the reference surface 12.

[0081] Specifically, as shown in FIGS. 12 and 13, the support member 150 includes a plurality of bolt members 152 engaged with bolt through-holes (not shown) formed in the bottom plate 120 with the base ends thereof placed on the reference surface 12, and a plurality of nut members 155 that support the bottom plate 120 in a state of being screwed to each of the plurality of bolt members 152.

[0082] Note that reference numeral 157 in FIGS. 12 and 13 is a locking nut screwed to a portion of the plurality of bolt members 155 that extends above the bottom plate 120, and reference numeral 158 is a washer.

[0083] In the present embodiment, the bottom plate 120 has the placement surface area 122 surrounded by the cylindrical side plate 110 and an extending surface area 125 that extends radially outward from the placement surface area 122 with respect to the wooden post 20 as a reference.

[0084] The bolt through-holes into which the plurality of bolt members 155 are engaged are formed in the extending surface area 125, and the plurality of bolt members 155 penetrate the extending surface area 125 vertically.

[0085] The rigid convex portion 30 is provided on the placement surface area 122 so as to protrude upward. In the present embodiment, as shown in FIGS. 12 and 13, a rigid member 35 such as stainless steel is fixed to the bottom plate 120 so as to penetrate the placement surface region 122 vertically, and the upper part of the rigid member 35 acts as the rigid convex portion 30.

[0086] The lower part of the rigid member 35 that extends downward from the bottom plate 120 is embedded in the foundation concrete 10, thereby improving the installation strength of the rigid convex portion 30.

[0087] The wooden pillar installation structure 2A is manufactured by the following wooden pillar installation method. The wooden pillar installation method includes a formwork member installation step (see FIG. 14) of installing the formwork member 100 on the reference surface 12 using the support member 150, and a placing step (see FIG. 15) of placing the foundation concrete 10 around the cylindrical side plate 110 so that the upper surface is at the same position as the upper end of the cylindrical side plate 110 or lower than the upper end of the cylindrical side plate 110. In the present embodiment, the placing step includes a first placing step of placing the first foundation concrete 10(1) on the reference surface 12 so as to have substantially the same thickness as the installation position of the bottom plate 12, and a second placing step of placing the second foundation concrete 10(2) on the first foundation concrete 10(1) so that the upper surface is at the same position as the upper end of the cylindrical side plate 110 or lower than the upper end of the cylindrical side plate 110.

[0088] In the present embodiment, as described above, the support member 150 can change the installation height of the bottom plate 120. Therefore, in the formwork member installation step, the height of the bottom plate 120 with respect to the reference surface 12 is adjusted to a desired position using the support member 150.

[0089] The wooden pillar installation method further includes the wooden pillar erection step (see FIG. 16) executed after the formwork member installation step, and the long member installation step (see FIG. 17) executed after the wooden pillar erection step.

[0090] In addition, in the present embodiment, the placing step is performed after the formwork member installation step and before the wooden pillar erection step, but the present invention is not limited to such a form. It is also possible to perform the placing step at an arbitrary timing after the formwork member installation step, for example, after the long member installation step.

[0091] Fig. 18 shows a longitudinal sectional view of a wooden pillar installation structure 2B according to a modification of the present embodiment. Fig. 19 shows a sectional view taken along line XIX-XIX in Fig. 18. In the drawings, the same members as those in the present embodiment and the first embodiment are denoted by the same reference numerals, and the description thereof is appropriately omitted.

[0092] The wooden pillar installation structure 2B according to the modification is different from the wooden pillar installation structure 2A according to the present embodiment only in that the cylindrical side plate 110 is omitted.

[0093] The wooden pillar installation structure 2B is manufactured by the following wooden pillar installation method. That is, the wooden pillar installation method includes the formwork member installation step (see Fig. 14), the placing step (see Fig. 15) executed after the formwork member installation step, a side plate removal step executed after the placing step, which is a side plate removal step of removing the cylindrical side plate 110 to form an installation hole 90 that opens upward in the foundation concrete 10 (see Fig. 20), the wooden pillar erection step (see Fig. 21) executed after the side plate removal step, and the long member installation step (see Fig. 22) executed after the wooden pillar erection step.

[0094] In this modification, preferably, the cylindrical side plate 110 is connected to the bottom plate 120 by partial welding or adhesion or the like, whereby the removal work of the cylindrical side plate 110 during the side plate removal step can be facilitated.

[0095] In particular, in the configuration where the cylindrical member 110 is connected to the bottom plate 120 by adhesion, the cylindrical side plate 110 can be formed of plastic having, for example, a strength capable of withstanding the pressure from concrete during the placing process.

[0096] Embodiment 3 Hereinafter, a wooden pillar installation structure 3A according to another embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 23 shows a longitudinal sectional view of the wooden pillar installation structure 3A according to the present embodiment. Also, FIG. 24 shows a sectional view taken along line XXIV-XXIV in FIG. 23. In the drawings, the same members as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0097] The wooden pillar installation structure 3A according to the present embodiment is different from the wooden pillar installation structure 2A according to the second embodiment in that the formwork member 100 is changed to the formwork member 100', and the bolt through-holes into which the bolt members 152 are inserted are formed in the placement surface area 122.

[0098] The formwork member 100' is different from the formwork member 100 in that the bottom plate 120 is changed to the bottom plate 120'.

[0099] Specifically, as shown in FIGS. 23 and 24, the formwork member 100' has the cylindrical side plate 110 and a bottom plate 120' connected to the cylindrical side plate 110 so as to close the lower end opening of the cylindrical member 110. The bottom plate 120' has the extending surface area 125 deleted as compared with the bottom plate 120.

[0100] In the present embodiment, the bolt through-holes into which the bolt members 152 are inserted are formed in the placement surface area 122. And the upper end surfaces of the plurality of bolt members 152 are flush with the upper surface of the bottom plate 120'.

[0101] The wooden pillar installation structure 3A is manufactured by the following wooden pillar installation method. The wooden pillar installation method includes a formwork member installation step (see Fig. 25) of installing the formwork member 100' on the reference surface 12 using the support member 150, a bolt cutting step (see Fig. 26) of cutting and removing a portion of the plurality of bolt members 152 that extends upward from the bottom plate 120', a placing step (see Fig. 27) of placing the foundation concrete 20 around the cylindrical side plate 110 such that the upper surface is at the same position as the upper end of the cylindrical side plate 110 or lower than the upper end of the cylindrical side plate 110, a wooden pillar erection step (see Fig. 28), and a long member installation step (see Fig. 29) that is executed after the wooden pillar erection step.

[0102] Note that the bolt cutting step can be performed at any timing as long as it is after the formwork member installation step and before the wooden pillar installation step.

[0103] Also, the placing step can be performed at any timing as long as it is after the formwork member installation step. In the present embodiment, the placing step includes a first placing step of placing the first foundation concrete 10(1) having a substantially the same thickness as the installation height of the bottom plate 120' on the reference surface 12, and a second placing step of placing the second foundation concrete 10(2) on the first foundation concrete 10(1) such that the upper surface is at the same position as the upper end of the cylindrical side plate 110 or lower than the upper end of the cylindrical side plate 110.

[0104] Fig. 30 shows a longitudinal sectional view of a wooden pillar installation structure 3B according to a modified example of the present embodiment. Also, Fig. 31 shows a sectional view taken along line XXXI-XXXI in Fig. 30. In the drawings, the same members as those in the present embodiment and the first to second embodiments are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

[0105] The wooden pillar installation structure 3B according to the modified example is different from the wooden pillar installation structure 3A according to the present embodiment only in that the cylindrical side plate 110 is omitted.

[0106] The wooden pillar installation structure 3B is manufactured by the following wooden pillar installation method. That is, the wooden pillar installation method includes the formwork member installation process (see Fig. 25), the bolt cutting process (see Fig. 26), the placing process (see Fig. 27), and a side plate removal process executed after the placing process. The side plate removal process is to remove the cylindrical side plate 110 to form an installation hole 90 that opens upward in the foundation concrete 10 (see Fig. 32), the wooden pillar erection process (see Fig. 33) executed after the side plate removal process, and the long member installation process (see Fig. 34) executed after the wooden pillar erection process.

[0107] The bolt cutting process can be performed at an arbitrary timing after the formwork member installation process and before the wooden pillar installation process. Also, the placing process can be performed at an arbitrary timing after the formwork member installation process and before the side plate removal process.

[0108] Embodiment 4 Hereinafter, a wooden pillar installation structure 4A according to another embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 35 shows a longitudinal sectional view of the wooden pillar installation structure 4A according to the present embodiment. Also, Fig. 36 shows a sectional view taken along line XXXVI-XXXVI in Fig. 35. In the drawings, the same members as those in the first to third embodiments are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0109] The wooden pillar installation structure 4A according to the present embodiment is different from the wooden pillar installation structure 2A according to the second embodiment in that it has a formwork member 200 instead of the formwork member 100 and further has a support plate 250 for supporting the formwork member 200.

[0110] Specifically, the wooden pillar installation structure 4A includes the support plate 250, the support member 150, the rigid member 35, the formwork member 200, the foundation concrete 10, the wooden pillar 20, and the plurality of rigid long members 50.

[0111] The support plate 250 has a overlapping region 252 that overlaps with the cylindrical side plate 110 in a plan view, and an extending surface region 255 that extends radially outward from the overlapping region 252 with respect to the wooden post 20.

[0112] In the present embodiment, the support member 150 supports the support plate 250 in a horizontal posture and enables the installation height with respect to the reference plane 12 to be changed.

[0113] Specifically, bolt through-holes into which the bolt members 155 are engaged are formed in the extending surface region 255, and the plurality of bolt members 155 penetrate the extending surface region 255 vertically.

[0114] The rigid member 35 is fixed to the support plate 250 so as to form the rigid convex portion 40 whose upper portion extends upward from the support plate 250. In the present embodiment, as shown in FIG. 35, the upper portion of the rigid member 35 extends upward from the support plate 250 to form the rigid convex portion 40, and the lower portion extends downward from the support plate 250 and is embedded in the foundation concrete 10.

[0115] The formwork member 200 has the cylindrical side plate 110 and a rigid bottom plate 220 connected to the cylindrical side plate 110 so as to close the lower end opening of the cylindrical side plate 110. The bottom plate 220 is provided with a through-hole through which the rigid convex portion 30 penetrates.

[0116] The formwork member 200 is placed on the upper surface of the support plate 250 in a state where the rigid convex portion 30 is engaged with the through-hole of the bottom plate 220.

[0117] Note that the formwork member 200 can be placed on the upper surface of the support plate 250 so as to be separable upward in a state before placing the foundation concrete 10, or can be fixed to the upper surface of the support plate 250 in a state before placing the foundation concrete 10.

[0118] Fig. 37 shows a longitudinal sectional view of a wooden pillar installation structure 4B according to a modified example of the present embodiment. Further, Fig. 38 shows a sectional view taken along line XXXVIII-XXXVIII in Fig. 37. In the drawings, the same members as those in the present embodiment and the above-described respective embodiments are denoted by the same reference numerals, and the description thereof will be appropriately omitted.

[0119] The wooden pillar installation structure 4B is different from the wooden pillar installation structure 4A in that the formwork member 200 is spaced upward from the support plate 250.

[0120] In the wooden pillar installation structure 4B, the formwork member 200 is fixed to the rigid member 35 and is thus indirectly supported by the support plate 250.

[0121] Fig. 39 shows a longitudinal sectional view of a wooden pillar installation structure 4C according to another modified example of the present embodiment. Further, Fig. 40 shows a sectional view taken along line XXXX-XXXX in Fig. 39. In the drawings, the same members as those in the present embodiment and the above-described respective embodiments are denoted by the same reference numerals, and the description thereof will be appropriately omitted.

[0122] The wooden pillar installation structure 4C is different from the wooden pillar installation structure 4A in that it has an auxiliary plate 260 fixed to the rigid member 35 at a position spaced upward from the support plate 250, and the formwork member 200 is placed on the auxiliary plate 260.

[0123] In the wooden pillar installation structure 4C, the formwork member 200 can be placed on the upper surface of the auxiliary plate 260 so as to be separable upward in a state before the placement of the foundation concrete 10, or can be fixed to the upper surface of the auxiliary plate 260 in a state before the placement of the foundation concrete 10.

[0124] In the wooden pillar installation structure 4B, the lower end of the rigid member 35 is located at the same position as the lower end surface of the support plate 250. Alternatively, the rigid member 35 can be fixed to the support plate 250 such that the lower part of the rigid member 35 extends downward from the support plate 250.

[0125] Also, in the fourth embodiment and its modified example, like the modified examples of the second and third embodiments, it is also possible to remove the cylindrical side plate 110.

[0126] Embodiment 5 Hereinafter, a wooden pillar installation structure 5A according to another embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 41 shows a longitudinal sectional view of the wooden pillar installation structure 5A according to the present embodiment. Also, FIG. 42 shows a sectional view taken along line XXXXII-XXXXII in FIG. 41. In the drawings, the same members as those in the first to fourth embodiments are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0127] The wooden pillar installation structure 5A is different from the wooden pillar installation structure 4B in that the formwork member 200 is deleted.

[0128] Specifically, as shown in FIGS. 41 and 42, the wooden pillar installation structure 5A includes the support plate 250 provided with the rigid convex portion 30 extending upward, the support member 150 horizontally supporting the support plate 250 on the reference surface 12, and the foundation concrete 10 placed on the reference surface 12 so as to cover the support plate 250 while having the installation hole 90 opening upward, and the rigid convex portion 30 protrudes upward from the bottom surface of the installation hole 90. The wooden pillar 20 and the plurality of rigid long members 50 are provided.

[0129] In the present embodiment, the rigid member 35 is fixed to the support plate 250 such that the lower end is located at substantially the same position as the lower surface of the support plate 250, and the upward extending portion of the rigid member 35 forms the rigid convex portion 30.

[0130] Of course, it is also possible to fix the rigid member 35 to the support plate 250 such that the upper portion of the rigid member 35 extends upward and the lower portion extends downward.

[0131] In the present embodiment, the foundation concrete 10 includes the first foundation concrete 10(1) placed on the reference surface 12 so as to cover the support plate 250 and such that the upper portion of the rigid member 35 protrudes upward to form the rigid convex portion 30, and the second foundation concrete 10(2) placed on the first foundation concrete 10(1), wherein the installation hole 90 is formed in the second foundation concrete 10(2) so as to open upward and such that the rigid convex portion 30 protrudes upward from the bottom surface.

[0132] The wooden column installation structure 5A is manufactured by the following wooden column installation method. The wooden column installation method includes a support plate installation step (see FIGS. 43 and 44) of installing the support plate 250 to which the rigid member 35 is fixed on the reference surface 12 using the support member 150 such that at least a part thereof extends upward, a first placing step (see FIG. 45) of placing the first foundation concrete 10(1) on the reference surface 12 so as to cover the support plate 250 and such that the upper portion of the rigid member 35 protrudes upward to form the rigid convex portion 30, a second placing step (see FIG. 46) of placing the second foundation concrete 10(2) having the installation hole 90 formed therein so as to open upward and such that the rigid convex portion 30 protrudes upward from the bottom surface on the first foundation concrete 10(1), a wooden column erection step (see FIG. 47), and a long member installation step (see FIGS. 41 and 42) executed after the wooden column erection step.

[0133] In the present embodiment as well, similar to the first embodiment, the installation hole 90 can be efficiently formed by, for example, placing the second foundation concrete 20 with a spacer (not shown) having a size corresponding to the installation hole 90 placed on the first foundation concrete 10 and then removing the spacer.

[0134] Also, as a matter of course, in the second to fifth embodiments and their modified examples, similar to the modified example (FIGS. 10 and 11) in the first embodiment, instead of the plurality of long members 50, the plurality of long members 50' are provided, and a filler 60 can be filled in the portion above the upper end of the long member 50' among the gaps 95.

[0135] Also, in each of the above embodiments and modified examples, the wooden pillar 20 has a circular cross-section. However, as a matter of course, the present invention is not limited to such a form, and it is also possible to use a wooden pillar having a rectangular cross-section or an elliptical cross-section.

[0136] Furthermore, in each of the above embodiments and modified examples, the rigid convex portion 30 has a cylindrical shape. However, as a matter of course, the present invention is not limited to such a form, and the rigid convex portion 30 can also be made spherical, conical, or rectangular.

[0137] Also, the methods 1A to 5A for installing the wooden pillar in each of the above embodiments and modified examples can include a moisture impregnation step of impregnating the plurality of compressed woods 52 with moisture after installing the plurality of compressed woods 52 in the gap 95. According to such a configuration, the expansion of the plate-like compressed wood 52 (52') can be made to act substantially evenly in the circumferential direction of the wooden pillar 20. The moisture can be water or water containing a preservative.

[0138] Also, the structures 1A to 5A for installing the wooden pillar according to each of the above embodiments and modified examples can include a plate-like rigid body 70 wound around a part or the whole in the circumferential direction of the wooden pillar 20. As the plate-like rigid body 70, for example, a copper plate, a stainless steel plate, an iron plate, or a carbon fiber can be used.

[0139] The plate-like rigid body 70 is wound around the wooden pillar 20 so that at least a part thereof is located within the installation hole 90. Preferably, in a state where the columnar rigid body 70 stands the wooden column 20 in the installation hole 90, at least a part thereof is wound around the wooden column 20 at a position facing the compressed wood 52(52’).

[0140] Preferably, a mounting groove 25 having a length in the longitudinal direction of the wooden column 20 equal to the width of the plate-shaped rigid body 70 and a depth equal to the thickness of the plate-shaped rigid body 70 is formed in the wooden column 20, and the plate-shaped rigid body 70 can be mounted in the mounting hole 25. According to such a configuration, the outer surface of the plate-shaped rigid body 70 and the portion of the outer surface of the wooden column 20 where the plate-shaped rigid body 70 does not exist can be flush. The plate-shaped rigid body 70 can be fixed to the wooden column 20 using an adhesive, for example.

[0141] FIG. 48 shows a longitudinal sectional view of a column installation structure 1C according to another modification of the first embodiment including the plate-shaped rigid body 70 as an example of a column installation structure including the plate-shaped rigid body 70. In addition, FIGS. 49(a) and (b) show sectional views taken along line XXXXIX-XXXXIX in FIG. 48.

[0142] As shown in FIG. 49(a), it is also possible to wind the plate-shaped rigid body 70 around the entire circumference of the wooden column 20, and as shown in FIG. 49(b), it is also possible to wind the plate-shaped rigid body 70 only around a part in the circumferential direction of the wooden column 20. Naturally, it is also possible to provide the plate-shaped rigid body 70 in a column installation structure according to other embodiments and modifications.

Explanation of reference numerals

[0143] 1A~5A Column installation structure 10 Foundation concrete 10(1), 10(2) First and second foundation concretes 20 Wooden column 22 Lower region of the wooden column 30 Rigid convex part 35 Rigid member 40 Concave part 50, 50' Rigid long members 52 Plate-shaped compression member 55 Outer shape unchanged member 60 Filling material 70 Plate-shaped rigid body 90 Installation hole 95 Gap 100, 100', 200 Form members 110 Cylindrical side plate 120, 120', 220 Bottom plate 122 Placing surface area 125 Extending surface area 150 Support member 152 Bolt member 155 Nut member 250 Support plate

Claims

1. A formwork member having a cylindrical side plate and a rigid bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate, A support member that supports the formwork member on a reference plane such that the upper end opening of the cylindrical side plate faces upward, Foundation concrete placed on the reference plane so as to cover the outer periphery of the cylindrical side plate, A wooden column in which at least a lower region located within the formwork member has a smaller diameter than an installation hole defined by the cylindrical side plate, A rigid convex portion and a concave portion provided directly or indirectly on one and the other of a placement surface region surrounded by the cylindrical side plate of the bottom plate and a base end surface of the wooden column, respectively. The rigid convex portion and the concave portion are positioned such that a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole in a state where the base end surface of the wooden column is placed on the bottom plate while engaging the rigid convex portion with the concave portion, A plurality of rigid elongate members inserted into the gap so as to be arranged in the circumferential direction of the wooden column in a state where the longitudinal direction is along the longitudinal direction of the wooden column and the inner side and the outer side with respect to the radial direction with respect to the wooden column are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, The plurality of rigid elongate members include a plurality of plate-like compressed woods in which the plate thickness direction is the expansion direction, The plurality of compressed woods are arranged in the circumferential direction of the wooden column in a state where one side and the other side in the plate thickness direction are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, The support member is configured to be able to change the installation height of the bottom plate with respect to the reference plane, The support member has a plurality of bolt members engaged with bolt through holes formed in the placement surface region of the bottom plate in a state where the base end portions are placed on the reference plane, and a plurality of nut members that support the bottom plate in a state of being screwed to each of the plurality of bolt members, The wooden column installation structure, characterized in that upper end surfaces of the plurality of bolt members are flush with the upper surface of the bottom plate.

2. A formwork member having a cylindrical side plate and a rigid bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate, A support member that supports the formwork member on a reference plane such that the upper end opening of the cylindrical side plate faces upward, Foundation concrete placed on the reference plane so as to cover the outer periphery of the cylindrical side plate, A wooden column in which at least a lower region located within the formwork member has a smaller diameter than an installation hole defined by the cylindrical side plate, Rigid convex portions and concave portions that are directly or indirectly provided on one side and the other side of the placement surface area surrounded by the cylindrical side plate of the bottom plate and the base end surface of the wooden column, respectively. In a state where the base end surface of the wooden column is placed on the bottom plate while engaging the rigid convex portion with the concave portion, the rigid convex portions and concave portions are positioned such that a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A plurality of rigid long members inserted into the gap so as to be arranged in the circumferential direction of the wooden column in a state where the longitudinal direction is along the longitudinal direction of the wooden column and the inner side and the outer side with respect to the radial direction with the wooden column as a reference are in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, respectively. The plurality of rigid long members include a plurality of plate-shaped compressed woods in which the plate thickness direction is the expansion direction. The plurality of compressed woods are arranged in the circumferential direction of the wooden column in a state where one side and the other side in the plate thickness direction are in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, respectively. The rigid convex portion is formed by the upper part of a rigid member fixed to the bottom plate so as to penetrate the placement surface area vertically. The lower part of the rigid member extending downward from the bottom plate is buried in the foundation concrete. The concave portion is provided on the base end surface of the wooden column so that the upper part of the rigid member can be engaged therewith. A wooden column installation structure characterized by this.

3. A support plate, A support member that horizontally supports the support plate on a reference surface, A rigid member fixed to the support plate so as to form a rigid convex portion extending upward from the support plate, A formwork member having a cylindrical side plate and a rigid bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate, and being directly or indirectly supported by the support plate such that the upper end opening of the cylindrical side plate faces upward. A through hole through which the rigid convex portion penetrates is provided in the bottom plate. Foundation concrete placed on the reference surface so as to cover the outer circumference of the cylindrical side plate, A wooden column in which at least the lower region located within the formwork member has a smaller diameter than the installation hole defined by the cylindrical side plate, and a concave portion into which the rigid convex portion is engaged is provided on the base end surface. In a state where the base end surface of the wooden column is placed on the bottom plate while engaging the rigid convex portion with the concave portion, the wooden column is configured such that a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A plurality of rigid long members inserted into the gap are arranged in the circumferential direction of the wooden column such that the longitudinal direction is along the longitudinal direction of the wooden column and the inner side and the outer side in the radial direction with respect to the wooden column are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. The plurality of rigid long members include a plurality of plate-shaped compressed woods in which the plate thickness direction is the expansion direction. The plurality of compressed woods are arranged in the circumferential direction of the wooden column in a state where one side and the other side in the plate thickness direction are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A wooden column installation structure characterized by this.

4. The formwork member is placed on the upper surface of the support plate so as to be separable upward in a state before placing the foundation concrete. The wooden column installation structure according to claim 3, characterized by this.

5. It has an auxiliary plate fixed to the rigid member at a position separated upward from the support plate. The formwork member is placed on the upper surface of the auxiliary plate so as to be separable upward in a state before placing the foundation concrete. The wooden column installation structure according to claim 3, characterized by this.

6. The formwork member is fixed to the rigid member at a position separated upward from the support plate. The wooden column installation structure according to claim 3, characterized by this.

7. A support plate provided with a rigid convex portion extending upward. A support member that horizontally supports the support plate on a reference surface. Foundation concrete placed on a reference surface so as to cover the support plate while having an installation hole that opens upward, and the rigid convex portion projects upward from the bottom surface of the installation hole. Foundation concrete formed in this way. A wooden column in which at least the lower region located in the installation hole has a smaller diameter than the installation hole and a concave portion into which the rigid convex portion is engaged is provided on the base end surface. In a state where the base end surface of the wooden column is placed on the bottom surface while engaging the rigid convex portion with the concave portion, a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A wooden column configured as described above. A plurality of rigid long members inserted into the gap are arranged in the circumferential direction of the wooden column such that the longitudinal direction is along the longitudinal direction of the wooden column and the inner side and the outer side in the radial direction with respect to the wooden column are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. The plurality of rigid long members include a plurality of plate-shaped compressed woods in which the plate thickness direction is the expansion direction. The plurality of compressed wood members are arranged in the circumferential direction of the wooden column in a state where one side and the other side in the plate thickness direction are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A wooden column installation structure characterized by this.

8. The upper end of the rigid long member ends below the upper end of the installation hole, A filler is filled in a portion above the upper end of the rigid long member among the gaps. The wooden column installation structure according to any one of claims 1 to 7, characterized by this.

9. The plurality of rigid long members include a plurality of members with unchanged outer dimensions, The plurality of members with unchanged outer dimensions are spaced apart in the circumferential direction of the wooden column, Among the gaps, between adjacent members with unchanged outer dimensions in the circumferential direction of the wooden column, the plurality of compressed wood members are arranged in the circumferential direction. The wooden column installation structure according to any one of claims 1 to 7, characterized by this.

10. The plurality of members with unchanged outer dimensions are arranged at equal intervals in the circumferential direction of the wooden column. The wooden column installation structure according to claim 9, characterized by this.

11. Having a plate-shaped rigid body wound around the wooden column so that at least a part thereof is located within the installation hole. The wooden column installation structure according to any one of claims 1 to 10, characterized by this.

12. The plate-shaped rigid body is wound around the wooden column so that at least a part thereof faces the compressed wood member. The wooden column installation structure according to claim 11, characterized by this.

13. A first placing step of placing first foundation concrete on a reference surface with an insertion hole that opens upward; A rigid member installation step of inserting a lower part of a rigid member into the insertion hole so that an upper part extends upward to form a rigid convex part; A second placing step of placing second foundation concrete having an installation hole that opens upward and is formed so that the rigid convex part protrudes upward from the bottom surface on the first foundation concrete; Inserting a wooden column into the installation hole, the lower region of which is made smaller in diameter than the installation hole and the base end surface of which is provided with a concave portion into which a rigid convex part protruding upward from the bottom surface of the installation hole of the rigid member is engaged, placing the base end surface of the wooden column on the bottom surface of the installation hole while engaging the rigid convex part with the concave portion, and standing the wooden column in the installation hole in a state where a gap exists over the entire circumference between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A wooden column standing step. A long member installation step of inserting a plurality of rigid long members into the gap so as to be arranged around the lower region of the wooden post with the longitudinal direction along the longitudinal direction of the wooden post. The plurality of long members include a plurality of plate-shaped compressed woods with the plate thickness direction as the expansion direction. The long member installation step is configured to arrange the plurality of plate-shaped compressed woods around the lower region of the wooden post with one side and the other side in the plate thickness direction of the plurality of plate-shaped compressed woods being in contact with the outer peripheral surface of the lower region of the wooden post and the inner peripheral surface of the installation hole, respectively. A wooden post installation method characterized by this.

14. A formwork member installation step of installing a formwork member having a cylindrical side plate and a bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate on a reference surface using a support member, and a rigid convex portion protruding upward is provided in the placement surface region surrounded by the cylindrical side plate of the bottom plate. A wooden post standing step of inserting a wooden post having at least a lower region with a smaller diameter than the installation hole defined by the cylindrical side plate and a concave portion in which the rigid convex portion is engaged on the base end surface into the installation hole, engaging the rigid convex portion into the concave portion, placing the base end surface of the wooden post on the bottom plate, and standing the wooden post on the bottom plate in the installation hole with a gap existing over the entire circumference between the outer peripheral surface of the lower region of the wooden post and the inner peripheral surface of the installation hole. A long member installation step of inserting a plurality of rigid long members into the gap so as to be arranged around the lower region of the wooden post with the longitudinal direction along the longitudinal direction of the wooden post. A placing step of placing base concrete on the reference surface so as to cover the outer periphery of the cylindrical side plate at an arbitrary timing after the formwork member installation step. The plurality of long members include a plurality of plate-shaped compressed woods with the plate thickness direction as the expansion direction. The long member installation step is configured to arrange the plurality of plate-shaped compressed woods around the lower region of the wooden post with one side and the other side in the plate thickness direction of the plurality of plate-shaped compressed woods being in contact with the outer peripheral surface of the lower region of the wooden post and the inner peripheral surface of the installation hole, respectively. The support member has a plurality of bolt members engaged with bolt through holes formed in the placement surface region with the base end portions placed on the reference surface, and a plurality of nut members that support the bottom plate in a screwed state with each of the plurality of bolt members, and the installation height of the bottom plate from the reference surface can be changed. A method for installing a wooden column, characterized by comprising a bolt cutting step of cutting and removing a portion of the plurality of bolt members that extends upward from the bottom plate after the formwork member installation step and before the wooden column erection step.

15. A formwork member installation step of installing a formwork member having a cylindrical side plate and a bottom plate connected to the cylindrical side plate so as to close the lower end opening of the cylindrical side plate, with a rigid convex portion protruding upward provided in a placement surface area surrounded by the cylindrical side plate of the bottom plate, on a reference surface using a support member; A placing step of placing foundation concrete on the reference surface so as to cover the outer periphery of the cylindrical side plate; A side plate removing step of removing the cylindrical side plate to form an installation hole that opens upward in the foundation concrete; A wooden column erection step of inserting a wooden column provided with a recess in a lower region at least located within the installation hole, having a smaller diameter than the installation hole and with the rigid convex portion engaged with the base end surface, into the installation hole, placing the base end surface of the wooden column on the bottom plate while engaging the rigid convex portion with the recess, and erecting the wooden column on the bottom plate within the installation hole with a gap existing over the entire circumference between the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole; A long member installation step of inserting a plurality of rigid long members into the gap so as to be arranged around the lower region of the wooden column in a state where the longitudinal direction is along the longitudinal direction of the wooden column; The plurality of long members include a plurality of plate-shaped compressed woods with the plate thickness direction as the expansion direction; The long member installation step is configured to arrange the plurality of plate-shaped compressed woods around the lower region of the wooden column in a state where one side and the other side in the plate thickness direction of the plurality of plate-shaped compressed woods are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. A method for installing a wooden column, characterized by this.

16. The support member has a plurality of bolt members engaged with bolt through holes formed in the bottom plate in a state where the base end portion is placed on the reference surface, and a plurality of nut members that support the bottom plate in a state of being screwed to each of the plurality of bolt members, and the installation height of the bottom plate from the reference surface can be changed; The bottom plate has an extending surface area that extends outward in the radial direction with respect to the wooden column from the placement surface area; The bolt through holes are formed in the extending surface area, and the plurality of bolt members penetrate the extending surface area vertically. The method for installing a wooden column according to claim 15, characterized by this.

17. The support member has a plurality of bolt members engaged with bolt through-holes formed in the placement surface region with the base end portion placed on the reference surface, and a plurality of nut members that support the bottom plate while being screwed onto each of the plurality of bolt members. The installation height of the bottom plate from the reference surface can be changed. The wooden pillar installation method according to claim 15, further comprising a bolt cutting step of cutting and removing a portion of the plurality of bolt members that extends upward from the bottom plate after the formwork member installation step and before the wooden pillar erection step.

18. A support plate installation step of installing a support plate to which a rigid member is fixed so that at least a part thereof extends upward on a reference surface using a support member. A first placing step of placing first foundation concrete on the reference surface while covering the support plate so that an upper portion of the rigid member protrudes upward to form a rigid convex portion. A second placing step of placing second foundation concrete having an installation hole that opens upward and is formed such that the rigid convex portion protrudes upward from the bottom surface on the first foundation concrete. A wooden pillar erection step of inserting a wooden pillar having at least a lower region with a smaller diameter than the installation hole and a recess in which the rigid convex portion is engaged at the base end surface into the installation hole, placing the base end surface of the wooden pillar on the bottom surface while engaging the rigid convex portion with the recess, and erecting the wooden pillar in the installation hole with a gap existing over the entire circumference between the outer peripheral surface of the lower region of the wooden pillar and the inner peripheral surface of the installation hole. A long member installation step of inserting a plurality of rigid long members into the gap so as to be arranged around the lower region of the wooden pillar in a state where the longitudinal direction is along the longitudinal direction of the wooden pillar. The plurality of long members include a plurality of plate-shaped compressed woods in which the plate thickness direction is the expansion direction. The long member installation step is configured to arrange the plurality of plate-shaped compressed woods around the lower region of the wooden pillar in a state where one side and the other side in the plate thickness direction of the plurality of plate-shaped compressed woods are respectively in contact with the outer peripheral surface of the lower region of the wooden pillar and the inner peripheral surface of the installation hole. The wooden pillar installation method is characterized by this.

19. The plurality of long members have a plurality of outer shape invariant members in addition to the plurality of plate-shaped compressed woods, and the outer shape is invariant. The long member installation step includes an outer shape invariant member installation process of installing the plurality of outer shape invariant members and a compressed wood installation process of installing the plurality of plate-shaped compressed woods after the outer shape invariant member installation process. The outer shape invariant member installation process is configured such that the inner and outer sides with respect to the radial direction based on the wooden column among a plurality of outer shape invariant members are respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole, and the plurality of outer shape invariant members are installed spaced apart from each other with respect to the circumferential direction of the wooden column. The compressed wood installation process is characterized in that a plurality of plate-shaped compressed woods are arranged around the wooden column in a region between adjacent outer shape invariant members with respect to the circumferential direction among the gaps, with one side and the other side in the plate thickness direction of the plate-shaped compressed wood respectively in contact with the outer peripheral surface of the lower region of the wooden column and the inner peripheral surface of the installation hole. The wooden column installation method according to any one of claims 13 to 18.

20. The wooden column installation method according to any one of claims 13 to 19, characterized by including a moisture impregnation process of impregnating moisture into the plurality of plate-shaped compressed woods after the long member installation process.

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