JP2019131977A - Wooden earthquake-resistant shelter and its construction method - Google Patents

Abstract

To provide a wooden earthquake-resistant shelter that is inexpensive and easy to install and its construction method capable of by not only reducing human damage due to the collapse of a wooden house when an earthquake occurs, but also by securing a living space by suppressing the collapse of the wooden house.SOLUTION: A wooden earthquake-resisting shelter installed in a wooden house is equipped with: a foundation part 10 which is arranged in contact with an existing foundation of a wooden house, and which is integrated with an existing foundation 110; a wall part 200 composed of a square wooden material 20 arranged on the foundation part 10 in a plurality of stages; a rigid ceiling panel 70 attached to the wall part 200; a shear force transmission mechanism for preventing lateral displacement of the square wooden materials 20 stacked horizontally; a vertical bar 30 in which one end is fixed to the base part 10 and passes through a hole 21 passing through the wall 200, and the plurality of square wooden materials 20 are fastened to the base 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wooden seismic shelter and a construction method thereof, and more particularly, to a wooden seismic shelter installed in a wooden house and horizontally stacked with square members and a construction method thereof.

  In many earthquakes so far, many lives have been lost due to the collapse of wooden houses. At present, it is estimated that there are approximately 5 million wooden houses nationwide that require earthquake-proof repairs. Therefore, in order to promote seismic repair of wooden houses and reduce human damage caused by earthquakes, the “Act on the Promotion of Seismic Repair of Buildings” was enforced, and various administrative assistance was provided for seismic repair based on such laws. It has been broken.

  However, the lower the seismic resistance of wooden houses, the greater the cost of seismic renovation, and the greater the amount of self-pay that exceeds the administrative assistance limit for seismic rehabilitation. As a result, wooden houses with lower earthquake resistance are often unable to complete earthquake-resistant repairs due to the size of the self-payment. For this reason, a wooden house with lower earthquake resistance should be preferentially subjected to earthquake-proof repair, but in reality, a wooden house with lower earthquake resistance tended to be left out of the earthquake-proof repair.

  On the other hand, various proposals have been made to install an earthquake-resistant shelter in the building in order to ensure the safety of human life even if the building collapses due to an earthquake, instead of performing earthquake-proofing of the entire building. For example, Patent Document 1 describes an earthquake-resistant shelter that can be installed at low cost by connecting square floor materials, column materials, beam materials, and the like with an earthquake-resistant joining device and overlapping a plurality of beam materials on the ceiling side. Has been.

JP 2010-222830 A

  By the way, when a huge trench-type earthquake occurs, it is expected that a large number of wooden houses will collapse and an enormous number of evacuees will occur in an extremely wide area. In such an ultra-wide area disaster, there are concerns that not only will there be a shortage of relief supplies in many evacuation centers, but the deaths related to elderly people in particular will rapidly increase in a worse living environment than at home. Therefore, in order to reduce the number of evacuees, it is necessary to secure a living space by preventing the collapse of wooden houses due to earthquakes.

  However, conventional earthquake-resistant shelters are intended to ensure the safety of human lives when a wooden house collapses, and do not improve the earthquake resistance of the entire wooden house. For this reason, even if the safety of human life is ensured by a conventional earthquake-resistant shelter, if a wooden house collapses due to an earthquake, the victims lose their living space as their homes and are forced to evacuate to a shelter.

  In particular, a conventional wooden earthquake-resistant shelter as described in Patent Document 1 is placed indoors, and the wooden earthquake-resistant shelter is not fixed to an existing foundation of a wooden house. In order to increase the horizontal strength of the wooden seismic shelter itself, a strong resistance force is required by the foundation, but a wooden seismic shelter without a foundation may be lifted by the horizontal force of the earthquake. Moreover, the conventional wooden earthquake-resistant shelter has a structure that secures a living space when a wooden house collapses due to an earthquake, and has not been a structure that prevents the collapse of the wooden house itself.

On the other hand, in recent years, conifers planted in large numbers immediately after World War II in various parts of Japan have come to the cutting stage. However, in recent years, new homes have been heavily used for imported timber, and the demand for domestic timber has decreased.
In addition, most of these domestic timbers have a thickness suitable for the pillars and foundations of wooden houses constructed by the conventional frame construction method, but in recent years the wooden frame wall construction method commonly called the two-by-four construction method is used. Such a construction method that does not use a square member has become widespread.
For this reason, effective utilization of domestic timber, particularly regular timber, has become a problem.

In addition, a log construction method is mentioned as a construction method which can use domestic timber in large quantities. The log construction method is a method of building a wall (log wall) by horizontally stacking timber (log material) such as logs and lumber, and is a popular construction method in villas as a so-called log house construction method. .
However, in the log construction method, in order to prevent rainwater from entering from the log wall that also serves as the outer wall, it is necessary to form a protrusion called a fruit and a groove for receiving the protrusion in the log material. Since a special processing device is required to form fruit on wood, log materials are more expensive than regular materials. Furthermore, in the construction by the log construction method, it is necessary to take measures against the settling phenomenon that the log wall sinks with time after the completion of construction. Therefore, special techniques are required for the construction of the wooden construction by the log construction method.

  And in order to reduce the amount of self-pay and to promote earthquake-resistant repair of old wooden houses with low earthquake resistance, it is necessary to avoid an increase in earthquake-resistant repair costs, and to reduce the burden on residents It is desirable that the construction period is short.

  The present invention has been made in view of the above circumstances, and not only reduces human damage caused by collapse of a wooden house at the time of an earthquake, but also prevents evacuees by securing a living space by suppressing the collapse of the wooden house. The purpose of the present invention is to provide a wooden earthquake-proof shelter that can be reduced in number and easy to construct and its construction method.

  The wooden earthquake-resistant shelter of the present invention is a wooden earthquake-resistant shelter installed in a wooden house, and is installed in contact with an existing foundation of the wooden house, and is integrated with the existing foundation. The laterally offset of the square parts, the wall part composed of square members horizontally stacked on the foundation part, the rigid ceiling panel attached to the wall part, and the square members horizontally stacked. A shearing force transmission mechanism for blocking, and a longitudinal bar that is fixed to the base portion at one end, passes through a vertical hole penetrating the wall portion, and binds a plurality of the square members to the base portion. Yes.

  Further, the construction method of the wooden seismic shelter of the present invention is a method of constructing a wooden seismic shelter in a wooden house, which is arranged in contact with the existing foundation of the wooden house and forms a foundation part integrated with the existing foundation. A base forming step, and a step of forming a plurality of square members on the base portion by aligning the positions of vertical holes penetrating in a direction orthogonal to the longitudinal direction of each square member to form a plurality of horizontally stacked walls. A step of fastening a plurality of steps of the square members stacked horizontally to the base portion by means of vertical bars vertically penetrating the wall portion and having one end fixed to the base portion; and a step of attaching a rigid ceiling panel to the wall portion; It is characterized by having.

  In the wooden seismic shelter and its construction method according to the present invention, the wall portion is composed of a plurality of steps of regular stacked square members, and the wall portion is fastened to the foundation portion by vertical bars, so that the wooden seismic shelter is horizontal in the event of an earthquake. High resistance to stress, and can prevent the wooden seismic shelter from rising during an earthquake. Further, since the shear force transmission mechanism prevents lateral displacement between the square members stacked horizontally, the wall portion exhibits a high strength as a load bearing wall. Furthermore, since the wall part is horizontally stacked with square members, the wall part has a high vertical support force and can prevent the house from collapsing.

  In addition, the vertical hole or the like of the square member that constitutes the wall portion can be easily formed by a normal pre-cut process, and it is not necessary to perform a special process such as forming a fruit on the square member. For this reason, it is possible to use a local regular square material that does not require expensive wood and is easily procured. Furthermore, the use of local regular timber can effectively utilize subsidies in accordance with the volume of timber, which is consistent with the policy of promoting the use of domestic timber and contributes to the restoration of Japanese forestry. Be expected.

In addition, since the square members stacked in a plurality of stages are installed in the existing wooden house, they do not directly receive the load of the existing wooden house. For this reason, it is possible to substantially avoid the occurrence of the settling phenomenon by using the dried square member. Since it is not necessary to take measures against the settling phenomenon, it can be easily constructed without requiring specialized techniques.
In addition, since the wall portion is configured by horizontally stacking square members, the wall portion can be used as it is as an interior having a log house-like appearance.

By the way, in order to install the wooden seismic shelter of the present invention, it is necessary to construct a foundation. Generally, when constructing a foundation, a formwork is installed and concrete is placed in the formwork. When installing the formwork, specialized skills are required to prevent the formwork from falling over during placement.
Since the skills in the building field are subdivided into a number of skills that each require specialized skills, when a specialist in basic construction is added to a carpenter who assembles a wooden earthquake-resistant shelter, the wage increases due to the increased skills, Not only will the installation cost of wooden seismic shelters increase, but it will also be necessary to adjust the schedules of craftsmen for many functions, which may lead to a longer construction period.
On the other hand, in order to reduce the amount of self-pay and promote the application to old wooden houses with low earthquake resistance, it is necessary to avoid an increase in costs, and in order to reduce the burden on residents, Is desirable to be short.

  Therefore, in the wooden seismic shelter according to the present invention, preferably, the foundation portion includes a U-shaped groove disposed along the existing foundation, a mold frame supported by the U-shaped groove, the mold frame, and the existing foundation. It is desirable to provide concrete placed between the two.

In the construction method of the wooden seismic shelter of the present invention, preferably, the foundation forming step includes a step of arranging a U-shaped groove along an existing foundation of a wooden house, and a form supported by the U-shaped groove. It is desirable to include a step of performing concrete, and placing concrete between the formwork and the existing foundation, and forming the foundation portion so as to be integrated with the existing foundation.
Thus, in the seismic shelter and its construction method of the present invention, if the formwork is supported using the U-shaped groove in the foundation, it is possible to easily install the formwork even if it is not a skilled technician. Can do. As a result, it is possible to construct the foundation while avoiding an increase in costs due to increased work.

  According to the present invention, it is possible to reduce the number of evacuees not only by reducing the human damage caused by the collapse of the wooden house at the time of the earthquake, but also by ensuring the living space by suppressing the collapse of the wooden house. It is possible to provide a wooden earthquake-proof shelter that is inexpensive and easy to construct, and a construction method thereof.

It is a fragmentary perspective view of the wooden earthquake-proof shelter by embodiment of this invention. (A)-(c) is a longitudinal cross-sectional schematic diagram of the wall part of the wooden earthquake-proof shelter shown in FIG. (A) is a partial top view explaining the construction method of the wooden earthquake-proof shelter by embodiment of this invention, (b) is the partial front view along the AA line of (a). (A) is a partial top view explaining the construction method of the wooden earthquake-proof shelter by embodiment of this invention following FIG. 3, (b) is the fragmentary front view along the AA line of (a). It is. (A) is a partial top view explaining the construction method of the wooden earthquake-proof shelter by embodiment of this invention following FIG. 4, (b) is the fragmentary front view along the AA line of (a). It is. (A) is a partial top view explaining the construction method of the wooden earthquake-proof shelter by embodiment of this invention following FIG. 5, (b) is the partial front view along the AA line of (a). It is. (A) is a partial top view explaining the construction method of the wooden earthquake-proof shelter by the modification of this invention, (b) is a partial front view along the AA line of (a). It is a fragmentary perspective view of the wooden earthquake-proof shelter by the modification of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a wooden earthquake-proof shelter and its construction method according to the present invention will be described with reference to the drawings.

(Wooden seismic shelter)
First, a wooden earthquake resistant shelter according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a partial perspective view of a wooden seismic shelter according to an embodiment of the present invention.

  The wooden earthquake-resistant shelter of this embodiment is installed in a wooden house with a conventional frame structure. In this embodiment, a wooden earthquake-proof shelter that is slightly smaller than the section is installed in a section of a wooden house. The wooden seismic shelter has four sides surrounded by a wall portion in which regular square members are horizontally stacked, and a window and an opening as an entrance are appropriately provided in a part of the wall portion.

  A wooden seismic shelter may be installed in any section of an existing wooden house, but it is installed in a section where at least one surface faces the outside so that the wooden seismic shelter can directly go in and out. It is preferable to do. Moreover, you may install a wooden earthquake-proof shelter only in a part in the division for one room of a wooden house.

  The wooden house shown in FIG. 1 has an existing wall portion of a conventional frame structure composed of an existing base 120, an existing pillar 130, and an existing beam 140 on an existing foundation 110 of a cloth foundation. In the wooden house shown in the figure, the floor and ceiling have been removed in order to install a wooden seismic shelter.

  The foundation 10 of the wooden earthquake-resistant shelter of this embodiment is disposed in contact with the existing foundation 110 of the wooden house and is integrated with the existing foundation 110. As will be described later in the embodiment of the construction method of the wooden earthquake-resistant shelter, the base portion 10 is preferably configured using a U-shaped groove.

On the base portion 10, a plurality of square members 20 of, for example, 10.5 mm square, which are appropriately cut to a desired length (for example, 1.8 m to 6 m), are stacked in a plurality of stages to form the wall portion 200. It is composed. That is, each square member 20 is stacked with its longitudinal direction extending horizontally as shown in FIG.
The corner portions of the square member 20 are stacked so as to alternately win and lose, but the method of stacking the corner portions is not limited to this. In the main wooden seismic shelter, the corners of the square member 20 may or may not intersect as in the log construction method.
Each of the plurality of regular square members 20 is formed with a vertical hole 21 having a diameter of about 40 mm that penetrates the plurality of regular square members 20 at, for example, an interval of 910 mm.

  This wooden seismic shelter is installed inside an existing wooden house, so there is no need to consider the ingress of rainwater. For this reason, it is not necessary to give the regular square member 20 a special process such as a ridge for preventing rainwater from entering, and the regular square member 20 is simply cut into a desired length and the vertical hole 21 is formed. It is possible to stack horizontally. The vertical hole 21 can be easily formed in the square member 20 by precut processing.

  The plurality of square members 20 that are horizontally stacked are fastened to the base portion 10 by vertical bars 30 having a diameter of 12 mm passing through the vertical holes 21. As a result, the wooden seismic shelter exhibits high strength against horizontal stress during an earthquake and can prevent the wooden seismic shelter from being lifted during an earthquake.

  Further, since the lateral displacement of the horizontally stacked square members 20 is prevented by a shearing force transmission mechanism which will be described later with reference to FIG. 2, the wall portion 200 exhibits a high proof stress as a load bearing wall. Furthermore, since the wall part is horizontally stacked with square members, the wall part has a high vertical support force and can prevent the house from collapsing. Further, by connecting the wall part 200 of the wooden seismic shelter with a beam of an existing wooden house such as an existing second-story floor beam that exerts a large seismic horizontal force, it further prevents the existing wooden house from collapsing. Can be achieved.

  Further, although not shown in FIG. 1, a rigid ceiling panel 70 (see FIG. 6B) is attached to the horizontally stacked uppermost square member 20 constituting the wall portion 200 of the wooden earthquake-resistant shelter. ing. The rigid ceiling panel 70 may be composed of, for example, a structural plywood and a ceiling joist. The provision of the rigid ceiling panel 70 not only protects the people in the wooden earthquake-resistant shelter from falling objects from above, but also makes contact with the existing frame structure of the existing wooden house in the wooden earthquake-resistant shelter. The horizontal stress is also transmitted to the unexposed portion through the rigid ceiling panel. As a result, the entire wooden seismic shelter can exhibit high strength against earthquake shaking.

  In addition, since the square members 20 stacked in a plurality of stages do not directly receive the load of the existing wooden house, the use of the square members 20 that have been sufficiently dried can substantially prevent settling. And the wall part 200 which laminated | stacked the square member 20 can also be utilized as an interior which has the log house-like aesthetics as it is.

Here, the longitudinal cross-sectional schematic diagram of the wall part of the wooden earthquake-proof shelter shown in FIG. 1 to FIG. 2 (a)-FIG.2 (c) is shown.
As shown in FIG. 2 (a), for example, a vertical streak 30 having a diameter of 12 mm is disposed in a vertical hole 21 passing through a wall portion 200 formed by horizontally stacking a plurality of regular square members 20. One end of the vertical bar 30 is fixed to the base portion 10 as an anchor bolt 31 embedded in the base portion 10.
The longitudinal bars 30 are configured by connecting bolts 31 having male screws formed at both ends with high nuts 32. A washer 34 is attached to the upper part of the vertical bar 30, and the plurality of square members 20 are fastened to the base portion 10 by the vertical bar 30 by tightening the washer 34 with a nut 35.
In addition, since the diameter (12 mm) of the vertical stripe is smaller than the diameter (40 mm) of the vertical hole 21 and there is a margin between the vertical stripe 30 and the inner peripheral surface of the vertical hole 21, There is no need to precisely align the vertical holes 21 of each square member 20.

Furthermore, as shown to Fig.2 (a), the rectangular parallelepiped wooden plug 22 is engage | inserted by the mortise 23 formed in the lamination | stacking surface where the stacked square members 20 oppose. Such wooden plugs 22 and mortises 23 function as a shearing force transmission mechanism to prevent lateral displacement of the square members 20 stacked horizontally.
In FIG. 2 (a), a gap is provided between the wooden plug 22 and the mortise 23 for easy understanding of the drawing. 23. Further, in FIG. 2 (a), only one piece of the wooden plug 22 and the mortise 23 is shown, but the wooden plug 22 and the mortise 23 are provided on each laminated surface where the regular square members 20 stacked horizontally contact each other. ing. Further, the mortise 23 does not require special processing and can be easily formed by precut processing.
Moreover, steel dowels and wooden dowels can also be used for the shear force transmission mechanism.

  Further, as shown in FIG. 2 (b), the grout 40 may be filled into the vertical hole 21 through which the vertical streak 30 passes. As a result of integrating the vertical bars 30 whose one ends are fixed to the base portion 10 and a plurality of horizontally stacked square members 20 by the grout 40, the foundation portion 10 and a plurality of steps of square members 20 stacked horizontally are integrated. A load-bearing wall in which the vertical bars 30 are integrated is formed. As a result, the earthquake-resistant shelter exhibits a high strength against horizontal stress during an earthquake, and can prevent the earthquake-resistant shelter from being lifted during an earthquake. In addition, since the bearing wall has a structure in which square bars are horizontally stacked, it has a high vertical support force. Thereby, the main wooden earthquake resistant shelter can prevent the collapse of the house at the time of the earthquake.

In this way, by integrating the vertically stacked plural square members 20 by the grout 40 injected into the vertical bars 30 and the vertical holes 21, a bearing wall is formed by an inexpensive and easy construction.
Further, if the grout 40 is used, it is not necessary to use an adhesive that is difficult to handle. The grout 40 is obtained by mixing cheap, readily available cement, sand and water at the site, so it is cheap and easy to obtain. Easy to install.

  In addition, when the grout 40 is filled in the vertical hole 21, the vertical streak 30 penetrating the vertical hole 21 and the grout 40 filled in the vertical hole 21 function as a shearing force transmission mechanism. Also good.

Further, as shown in FIG. 2C, a vinyl chloride pipe 41 may be further passed through the vertical hole 21, and the vertical bars 30 may be passed through the pipe 41. By passing the pipe 41 through the vertical hole 21, it is possible to prevent the grout 40 injected into the vertical hole 21 from leaking out of the vertical hole 21.
Even when the pipe 41 is provided, the vertical streak 30 passing through the vertical hole 21, the grout 40 filled in the vertical hole 21, and the pipe 41 function as a shearing force transmission mechanism. Also good. The material of the pipe 41 is not limited to vinyl chloride.
Further, only the pipe 41 may be provided as the shearing force transmission mechanism without filling the grout 40.
If the grout 40 is not filled, the diameter of the vertical hole 21 may be reduced to, for example, 25 mm.

  Furthermore, it is preferable to connect and fix the wall portion 200 of the wooden earthquake-resistant shelter to an existing wooden house (for example, an existing second-story floor beam on which a large seismic horizontal force works), thereby further preventing the wooden house from collapsing. be able to.

(Wooden seismic shelter construction method)
Next, with reference to FIGS. 3-6, the construction method of the wooden earthquake-proof shelter by embodiment of this invention is demonstrated. 3 (a), 4 (a), 5 (a), and 6 (a) are partial plan views for explaining the construction method of the earthquake-resistant shelter according to the embodiment of the present invention, and FIG. 3 (b). 4 (b), FIG. 5 (b) and FIG. 6 (b) are partial cross-sectional views taken along line AA in FIG. 4 (a) to FIG. 6 (a), respectively. In addition, illustration of a beam is abbreviate | omitted in Fig.3 (a)-FIG.6 (a).

  First, when constructing a wooden seismic shelter, the existing floor and ceiling of the installation area of the wooden seismic shelter in the wooden house are removed.

  Next, as shown in FIG. 3A, the U-shaped groove 11 is arranged along the existing foundation 110 of the wooden house. The U-shaped groove 11 may be installed so as to level the soil G so that the U-shaped groove 11 is stable, or may be installed so as to be stabilized by digging the soil G. In FIG.3 (b), the U-shaped groove | channel 11 installed by digging down the ground for a while is shown. Further, the U-shaped groove 11 may be installed so as to be in contact with the existing foundation 110 or may be installed separately from the existing foundation 110.

Subsequently, the mold 12 supported by the U-shaped groove 11 is disposed. The mold frame 12 is disposed in contact with the inner side of the side wall portion 11a on the side farther from the existing foundation 110 out of the two side wall portions 11a and 11b of the U-shaped groove 11. Further, the plywood mold 12 may be cut out by the thickness of the bottom plate of the U-shaped groove 11 and may be placed upright and may not be fixed. On the existing foundation 110 side, no formwork is provided, and the existing foundation 110 is used instead of the formwork.
Thus, by supporting the formwork 12 using the U-shaped groove 11, even if it is not an engineer who has a specialized skill, the formwork 12 can be installed easily. As a result, it is possible to easily construct the base portion 10 while avoiding an increase in cost due to an increase in work ability.

  Furthermore, the bar arrangement 13a is horizontally arranged inside the U-shaped groove 11 along the extending direction of the U-shaped groove 11. As shown in the cross section of FIG. 4B, the bar arrangement 13a has two lower bars and one upper bar. A spacer (not shown) is attached to the lower end line to secure the cover thickness. The post-construction anchor bolt 31 extends in a direction orthogonal to the reinforcing bar 13a, and one end of the anchor bolt 31 is inserted into a perforation on the side surface of the existing foundation 110. In addition, the number and position of reinforcement are not limited to this.

Next, as shown in FIGS. 4A and 4B, the concrete 13 is placed between the mold 12 and the existing foundation 110 to form the foundation 10 integrated with the existing foundation 110. An anchor bolt 31 is installed after several hours have passed after placing the concrete 13.
In addition, a leveler is placed to reach the level of the upper end surface of the foundation. In this way, the installation of the foundation 10 is completed.

Next, as shown in FIGS. 5 (a) and 5 (b), the vertical hole 21 formed so as to penetrate in the direction perpendicular to the longitudinal direction of the square member 20 is formed in the same manner as the foundation in the conventional shaft construction method. The square member 20 is arranged on the base portion 10 so that the anchor bolt 31 penetrates.
Further, as shown in FIG. 5 (b), the face member 50 to which the connecting material 51 made of square members is attached with screws is attached to the existing beam 140 and the hanging wall 150 with screws.

  Next, as shown in FIG. 6A and FIG. 6B, the plurality of regular square members 20 are aligned at the positions of the vertical holes 21 penetrating in the direction perpendicular to the longitudinal direction of each regular square member 20. The wall part 200 is formed by horizontally stacking.

  When the wooden plug 22 shown in FIG. 2A is used as a shearing force transmission mechanism for preventing lateral displacement between the horizontally stacked square members 20, the mortise 23 is formed on the laminated surface of the square members 20 by precut processing. It is preferable to stack the regular square member 20 by inserting the wooden plug 22 into the mortise 23.

Subsequently, a plurality of steps of square members 20 stacked horizontally are fastened to the base portion 10 by the vertical bars 30 that vertically penetrate the wall portion 200 and have one end fixed to the base portion 10. The vertical bars 30 are formed by sequentially connecting bolts 31 having male screws formed at both ends with high nuts 32 in accordance with the stacking of the square members 20. A washer 34 is attached to the upper part of the vertical bar 30, and by tightening the washer 34 with a nut 35, the plural square members 20 are fastened to the base portion 10 with the vertical bar 30. The step of arranging the vertical bars 30 may be performed before or after the step of horizontally stacking the square bars.
Subsequently, the regular square member 20 (for example, the uppermost regular square member 20) constituting the wall portion 200 is joined to the connecting member 51 with screws.

As a shearing force transmission mechanism, as shown in FIG. 2B, the grout 40 is filled in the vertical hole 21 through which the vertical bar 30 penetrates, and the vertical bar 30 and the vertical bar 30 are stacked in a plurality of stages by the grout 40. The square member 20 may be integrated.
Furthermore, as a shearing force transmission mechanism, as shown in FIG. 2C, the pipe 41 is passed through the vertical hole 21, and the grout 40 is filled into the pipe 41 through which the vertical bar 30 penetrates. The vertical bars 30 may be integrated with a plurality of horizontally stacked square members 20.

Further, the rigid ceiling panel 70 is attached to the uppermost square member 20.
Finally, the wooden house floor is restored and, if necessary, the existing ceiling around the seismic shelter is restored. The wooden seismic shelter is preferably provided with an underfloor storage, and disaster supplies are stored in the underfloor storage.

(Modification)
Next, a modification of the embodiment shown in FIG. 3 will be described with reference to FIG. FIG. 7 shows a process corresponding to FIG. 3, FIG. 7 (a) is a partial plan view for explaining a wooden earthquake-proof shelter and its construction method according to a modification of the present invention, and FIG. It is a partial front view along the AA line of 7 (a).

  In the embodiment described above, the base portion 10 of the earthquake-resistant shelter is in contact with and integrated with the existing foundation 110 on the entire periphery thereof. However, in the present invention, the foundation portion 10 of the earthquake-proof shelter is integrated with the existing foundation 110 on the entire periphery thereof. It is not necessary to make contact with each other, and the existing foundation 110 may be in contact with and integrated with a part of the foundation portion 10.

  In the modified example shown in FIG. 7, the base portion of the section along the existing foundation 110 on the right side of FIG. 7A is arranged away from the existing foundation 110. Here, the long formwork 12 is arrange | positioned inside the side wall parts 11a and 11b of the both sides of the U-shaped groove 11, respectively. In the base portion of this section, concrete is placed between the molds 12, not between the molds 12 and the existing foundations 110.

  Furthermore, also in the section along the left and upper existing foundation 110 on the left side and the upper side of FIG. 7A, the mold 12 is placed inside the side wall sections 11 a and 11 b on both sides of the U-shaped groove 11 constituting the foundation section. Is arranged. However, in this section, the formwork 12 is disposed only in the section where the U-shaped groove 11 is located inside the side wall portion 11b of the U-shaped groove 11 on the existing foundation 110 side. For this reason, in the U-shaped groove 11, concrete is placed only between the molds 12, and no concrete is placed between the U-shaped groove 11 and the existing foundation 110. Thereby, the usage-amount of concrete can be suppressed.

  Further, in the portion along the left and upper existing foundations 110 in FIG. 7A, the portion where the U-shaped groove 11 is not disposed is supported by the side wall portion 11 a far from the existing foundation 110 of the U-shaped groove 11. Concrete is placed between the formed mold 12 and the existing foundation 110. Thereby, also in this modification, the foundation part of the earthquake-proof shelter and the existing foundation 110 are integrated. In particular, it is preferable that the foundation portion and the existing foundation 110 are integrated at the corner portion of the orthogonal foundation portion that is in contact with the existing foundation 110.

A modification of the embodiment shown in FIG. 1 will be described with reference to FIG. FIG. 8 is a partial perspective view of a modified wooden seismic shelter.
In the wooden seismic shelter shown in FIG. 1, each square member 20 is cut to a length equivalent to one side of the wall portion 200 except for the opening, but in this modification, each square member 20 a is, for example, Cut to a length of about 1 m. Thereby, each square member 20a becomes small and becomes the weight which an operator can lift alone. Thereby, for example, the process of horizontally stacking the square members 20a to form the wall portion 200a can be performed by a smaller number of workers, for example, one worker. Thereby, a wooden earthquake-proof shelter can be constructed more inexpensively.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. In the embodiment described above, the base portion 10 of the earthquake-resistant shelter is in contact with and integrated with the existing foundation 110 on the entire periphery thereof. However, in the present invention, the foundation portion 10 of the earthquake-proof shelter is integrated with the existing foundation 110 on the entire periphery thereof. It is not necessary to make contact, and it is only necessary that the existing foundation 110 is in contact with and integrated with a part of the foundation portion 10.
In the above-described embodiment, an example in which the regular square members 20 are stacked has been described. However, square members having a rectangular cross section may be used.

In the above-described embodiment, the example in which the foundation portion of the earthquake-resistant shelter is installed along the existing foundation of the cloth foundation is described. However, in the present invention, the existing foundation is not limited to the cloth foundation, for example, a solid foundation. It may be a bundling foundation. In the case of a bundling foundation, the bundling and the foundation part may be integrated.
Moreover, although embodiment mentioned above demonstrated the example which provided the base part 10 using a U-shaped groove, in this invention, the structure of a base part is not limited to what uses a U-shaped groove.

  The wooden earthquake-resistant shelter of the present invention is suitable for earthquake-proof reinforcement of wooden houses and wooden structures, for example, earthquake-proof reinforcement of care houses for elderly people who are vulnerable to disasters.

DESCRIPTION OF SYMBOLS 10 Base part 20 Regular square material 21 Vertical hole 22 Tree plug 23 Mortise 30 Vertical bar 31 Bolt 32 High nut 34 Washer 35 Nut 40 Grout 41 Pipe 100 Existing wall part 110 Existing foundation 120 Existing base 140 Existing beam 200 Wall part 210 Opening part

Claims (7)

A wooden seismic shelter installed in a wooden house,
A base portion arranged in contact with an existing foundation of a wooden house and integrated with the existing foundation;
A wall part composed of square members stacked in a plurality of stages on the foundation part;
A rigid ceiling panel attached to the wall;
A shearing force transmission mechanism that prevents lateral displacement of the square members stacked horizontally;
A wooden seismic shelter comprising: one end fixed to the base part, passing through a vertical hole penetrating the wall part, and a plurality of vertical bars connecting the square members to the base part. The foundation is
A U-shaped groove arranged along the existing foundation;
A formwork supported by the U-shaped groove;
The wooden earthquake-proof shelter according to claim 1, further comprising concrete placed between the formwork and the existing foundation. The said shearing force transmission mechanism is comprised by a rectangular parallelepiped wooden plug and the mortise formed in the lamination | stacking surface of the said square member in order to insert the said wooden plug. Wooden earthquake-proof shelter. Each of the plurality of regular square members is formed with a vertical hole penetrating the wall portion,
The wooden structure according to any one of claims 1 to 3, wherein the shearing force transmission mechanism includes the vertical streak penetrating the vertical hole and a grout filled in the vertical hole. Seismic shelter. The shearing force transmission mechanism includes a pipe disposed in the vertical hole, the vertical stripe passing through the pipe, and a grout filled in the pipe. The wooden earthquake-resistant shelter as described in any one of -3. A method of constructing a wooden earthquake-proof shelter in a wooden house,
A foundation forming step that is arranged in contact with an existing foundation of a wooden house and forms a foundation portion integrated with the existing foundation;
On the base portion, a plurality of regular square members are aligned with the positions of the vertical holes penetrating in a direction perpendicular to the longitudinal direction of each regular square member to form a wall portion that is stacked in multiple stages, and
A step of fastening a plurality of steps of the square members stacked horizontally to the base portion by means of vertical bars vertically penetrating the wall portion and having one end fixed to the base portion;
A method for constructing a wooden earthquake-resistant shelter, comprising: attaching a rigid ceiling panel to the wall portion. The foundation forming step
Arranging a U-shaped groove along the existing foundation of the wooden house;
Arranging the formwork supported by the U-shaped groove;
Placing concrete between the formwork and the existing foundation, and forming the foundation portion so as to be integrated with the existing foundation;
The construction method of the wooden earthquake-proof shelter according to claim 6, characterized by comprising:

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