JP2010112158A - Elastic packing for underfloor space air ventilation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packing for air ventilation provided between a foundation of a building and a ground sill and capable of preventing the occurrence of floor creaking due to loosening of a nut for tightening the ground sill due to contraction caused by unevenness in crest of the foundation and drying with age of a sill for lumber caused after completion of construction of a house and coping with positional deviation of an anchor bolt easily. <P>SOLUTION: In this elastic packing for air ventilation, a transverse face of the packing is formed by a plurality of arc-shaped parts and a plurality of horizontal parts to provide the functions for preventing the nut from being loosened due to unevenness in the crest of the foundation and contraction of the ground sill caused by drying with age owing to elastic repulsion of the arc shape irrespective of compression of the elastic packing when tightening the ground sill. This elastic packing is regularly inverted or is inverted to the right and left-vertically for the anchor bolt causing positional deviation to make a loose hole an expanded insertion hole in order to insert it into the expanded insertion hole easily and enhance ease of construction work. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

[Technical Field] The present invention relates to an underfloor ventilation packing interposed in the gap for forming a gap for ventilation between a concrete foundation of a house and a wooden base.

Regarding the height-variable ventilation packing, JP-A-2006-104843 and JP-A-200
No. 7-231515, etc. are known, all of which have a structure and specifications that are inserted into anchor bolts with a circular synthetic resin molded product, and are difficult to install without anchor bolts. Sometimes it is not possible to cope with the shrinkage of the foundation due to aged drying after completion of the house only by adjusting the height of the top of the concrete foundation against unevenness.

Similarly, Japanese Patent Laid-Open No. 10-219856 is known for a steel height variable ventilation packing. In this publication, the side that touches the base is the substrate part, and a plurality of elastic protrusions with different corrugated plate-like heights are provided with support projections fixed at a fixed height on the base side Has a variable structure.

However, even though it can be said that the height can be varied with a corrugated slit elastic protruding piece, the height can only be changed to the bottom of the supporting projection (basic ground contact surface) fixed at a certain height. In addition, in order to withstand the load of the house, the plate thickness must be increased so that the price is high.

Japanese Laid-Open Patent Publication No. 2002-309683 is known as a resin-made height-variable ventilation packing, which is composed of three parts, a base, a lift upper surface, and a spacer. Is compatible with the unevenness of the top of the foundation, but in addition to the large number of parts,
The structure is complicated. In the case of Japanese Patent Application Laid-Open No. 2002-309684, this corresponds to the unevenness of the top of the foundation by sliding the packing itself, but both publications cannot cope with the shrinkage of the foundation due to aged drying after the completion of the house. .

Japanese Laid-Open Patent Publication No. 10-205010 is known as an uneven adjustment plate for basic packing. Here, it is sandwiched from the left and right on the packing, and it corresponds to the unevenness of the top of the foundation, but this type of basic unevenness adjustment plate that is sandwiched from the left and right has several types with different thickness depending on the degree of unevenness The adjustment plate is complicated, and is an adjustment plate for the basic unevenness to the last, and is a structure that cannot cope with the shrinkage of the foundation due to the aged drying after the completion of the house.

Next, as a ventilation packing by repetitive unevenness made of steel, Japanese Patent Application Laid-Open No. 2004-3
No. 267 is known. Since the height is fixed below the anchor bolt wire diameter, this structure cannot cope with the shrinkage of the foundation due to aged drying of the foundation after the completion of the house even if the foundation top is not flat.

In addition, this publication provides a plurality of loose holes for anchor bolt insertion.
There is a place where the width of the loose hole is the entire horizontal surface between the vertical surfaces. In this case, there are defects such as occurrence of crevice during press working and complicated maintenance work of the mold.

Similarly, as a ventilation packing by repeated steel unevenness, Japanese Patent Application Laid-Open No. 2005-2005
No. 220736 is known, but because the height is fixed below the wire diameter of the anchor bolt, the foundation by the aged drying of the foundation after the completion of the house against the unevenness of the foundation top It is a structure that cannot cope with the shrinkage.

In addition, this publication provides a plurality of loose holes for inserting anchor bolts. However, with such a loose hole shape, the anchor bolts that are upright from the foundation are properly or horizontally reversed or up and down. Inverted, it is impossible to pass through all the misaligned anchor bolts, and in addition, the loose hole that cuts out the vertical plane from the horizontal plane to the next horizontal plane, the supporting force against the load of the house becomes weak, Inevitably, a thick material must be used, and the material cost is high.

Usually, in the foundation work when building a house, the incline of the top of the concrete foundation is unavoidable, and the incline of about 1 to 4 mm is common. As described above, various conventional techniques are available.

In addition, several years after the completion of the house, the foundation shrinks by 1 to 3 mm due to aged drying,
There are problems such as loosening of the nut for fastening the base and ringing of the floor. On the other hand, the actual situation is that the nuts are retightened under the floor.

As a problem to solve the above drawbacks, from the standpoint of under-floor ventilation packing called the “Neko Foundation Method”, it is supervised by the Housing Finance Support Organization, which is an index of wooden house construction.
Provisions of the "over the entire periphery of the base, provided 1m per effective area 75 cm ² or more ventilation holes" are shown in 1 of 3.3.10 underfloor ventilation sections mortgage Promotion Association issued "wooden houses Construction Specification" P24 (1) Equipped with the ability to cope with the unevenness of the foundation, (2) After the completion of the house, prevention of squealing due to shrinkage of the foundation due to aged drying, (3) Prevention of crevice during press processing, (4 ) Improvement of workability on site is required.

JP 2006-104843 A JP 2007-231515 A Japanese Patent Laid-Open No. 10-219856 JP 2002-309683 A JP 2002-309684 A Japanese Patent Laid-Open No. 10-205010 Japanese Patent Laid-Open No. 2004-3267 Japanese Patent Laid-Open No. 2005-220736 "Housing construction specifications" supervised by the Housing Finance Support Organization, revised version in 2007

The present invention has a length of about 200 mm that is used as a member for ventilation under the floor between the foundation of the building and the base, has the same width as the base, has a rectangular shape as a whole, has a plate thickness of about 1 mm, and the height of the ventilation surface. The underfloor aeration packing having a size of about 9 mm to 14 mm, which has a plurality of arc-shaped portions having different R dimensions and a plurality of horizontal portions having different lengths on the lateral surface of the uneven surface. Is installed between the base and the base, and when the nut is fastened to the anchor bolt raised from the foundation at the upper part of the base, the air packing is compressed and elastically deformed by compressing about 14 mm in height of the air vent surface. In the event of a large earthquake, it resists bending pressure on the anchor bolts to increase the seismic resistance of the frame. By force aged drying Underfloor characterized by having a lot of functions in addition to the ventilation function because the plate thickness, arc-shaped part, horizontal part and height are closely related, such as preventing floor noise due to table contraction An elastic packing for ventilation is used as a solution.

The present invention is the ventilation packing according to claim 1, wherein a steel plate is used as a material, and a plurality of concave and convex horizontal surfaces in which vertical surfaces and horizontal surfaces are alternately connected have a vertical height of about 14 mm. Means for solving the problem with an elastic packing for under-floor ventilation, characterized in that the arc-shaped portion has an elastic function, and a plurality of horizontal portions having a height of about 9 mm can secure a minimum ventilation area. And

The present invention provides the ventilation packing according to claim 1, wherein an oval loose hole for inserting an anchor bolt that is raised from the foundation is provided at a portion that moves from a vertical surface to a horizontal surface in which unevenness is repeated. By providing a crosspiece with a width of 2 times or more and providing an oval type loose hole on the lateral surface between the crosspieces, it is possible to prevent the occurrence of crevice during press working and reduce the maintenance work of the mold. An elastic packing for underfloor ventilation is the solution.

The present invention is the ventilation packing according to claim 1, wherein a plurality of oblong loose holes for inserting anchor bolts having different lateral widths are provided on the upper and lower lateral surfaces so as to be deviated from the longitudinal and lateral centerlines, With respect to the misaligned anchor bolts raised from the foundation, the workability is improved by arranging the ventilation packing so that it can be inserted through the normal or horizontally reversed or upside down without difficulty. An elastic packing for underfloor ventilation is the solution.

According to the elastic packing for underfloor ventilation according to claim 1, the aeration packing in which a plurality of arc-shaped portions and a plurality of horizontal portions are arranged on a repetitive uneven surface where the vertical surface and the horizontal surface are alternately connected, and Thus, when the nut is tightened on the base and the height is compressed to 10.25 mm or less, which is described in detail in 0029, the arc-shaped portion of the lateral surface is elastically deformed. (1)
There is an effect of fenders, and (2) there is a function to strongly support anchor bolts during a large earthquake,
(3) It has sufficient capability to cope with the unevenness of the top of the foundation, and (4) has the function of preventing floor noise caused by shrinkage of the foundation due to aged drying after the completion of the house. According to the elastic packing for under-floor ventilation, the vertical portions of the plurality of vertical surfaces are about 7 mm, and the vertical height of the plurality of horizontal surfaces is 14 m.
By compressing the arc shape around m, the arc-shaped part rebounds elastically and solves the trouble caused by the unevenness of the top of the foundation, and the horizontal height of multiple horizontal surfaces is also set to around 9 mm The structure ensures a minimum ventilation area. According to the elastic packing for under-floor ventilation according to claim 3, a crosspiece having a width more than twice the plate thickness is provided on the left and right sides of the oblong loose hole for anchor bolt insertion, which is raised from the foundation. By providing an oval type loose hole on the lateral surface between the two, it is possible to prevent the occurrence of crevice during press working and reduce the maintenance work of the mold.
According to the described elastic packing for ventilation under the floor, an oval type loose hole with different widths applied to a plurality of upper and lower lateral surfaces even if the anchor bolts raised from the foundation are shifted in design or construction. By reversing left and right or up and down, it becomes an enlarged insertion hole, which facilitates the insertion of the anchor bolt, resulting in a number of excellent effects such as improved workability.

Hereinafter, an embodiment of an elastic packing for underfloor ventilation (hereinafter referred to as an elastic packing) of the present invention will be described in detail. FIG. 1-1 is a plan view as an example of an elastic packing. FIG. 1-2 is a side view of the elastic packing in which unevenness is continuously arranged alternately from the vertical surface to the horizontal surface and from the horizontal surface to the vertical surface.
1-3a, 3b, 3c, 3d, 3e, 3f are arcuate portions of the lateral surface, and FIGS. 1-4a, 4b are horizontal portions of the lateral surface.
1-5 is a vertical portion of the vertical surface, FIG. 1-6a is a horizontal flange portion of the end surface, and 1-6b is a bent R portion of the end surface. Fig. 1-7 shows a cylindrical protrusion (burring). 1-8a, 8b, 8c, 8d, 8e, and 8f are oval loose holes for inserting anchor bolts. Fig. 1-9 shows the bars provided on the left and right in the longitudinal direction of the oval loose hole. The range is indicated by /////. FIG. 2A is a plan view as an example of the elastic packing similar to FIG. 1-1. Fig. 2-2a, 2b, 2c, 2d, 2e, 2f show a plurality of oval loose holes for inserting anchor bolts with solid lines, and Fig. 2-3 is an enlarged view that can be made by flipping the elastic packing left and right or upside down. It is the top view which showed the insertion port which was shown with the dashed-dotted line.

The elastic packing 1-1 of the present invention uses stainless steel having a plate thickness of about 0.8 mm as a material,
The overall length is about 200 mm, the width is about 100 mm for a 3.5-inch base, for example, the vertical height (thickness) of the horizontal arc-shaped portion is about 13 mm, and the vertical height (thickness) of the horizontal portion. Is about 9 mm.

The arcuate portion of the horizontal surface varies depending on the width of the vertical surface and the vertical surface, and is about 13R to 50R. The horizontal flange portion 1-6a on the left and right end surfaces faces inward for several millimeters, and the bending portion 1-6b is 2R. As a degree, 00
Excessive load described in 27 (Applicant's recognition is more than 10 times 417Kg, that is, 4170K
Even if g or more) is applied, it plays a role of preventing the elastic packing from extending horizontally and being lowered.

The numerical values indicated by 0021 and 0022 are (1) a numerical value with a structure in which the arcuate portion of the lateral surface is elastically repelled and can cope with floor squealing due to unevenness of the base top and shrinkage of the foundation due to aged drying. , (2)
Even when the horizontal part of the side surface of the elastic packing is compressed when the nut is fastened at the top of the base during construction
It is a numerical value that can secure the ventilation area described in “Wooden house construction specifications” shown in 013, (3
) In the below-mentioned 0040, “the function which strongly supports the M12 anchor bolt at the time of a large earthquake”
The plate thickness, height, arc-shaped part, and horizontal part for "providing a function to prevent the invasion of mice" described in 0042.

When this elastic packing is installed between the foundation and foundation and the nut is fastened on the foundation,
If the height of the elastic packing is compressed to 10.25 mm or less, the arc-shaped part will rebound elastically, not to mention the unevenness of the top of the foundation, but also the floor noise that occurs due to shrinkage of the foundation due to aged drying after the completion of the house Cylindrical protrusions 1-7 with an inner diameter of several millimeters and a height of several millimeters above and below the horizontal surface
The cylindrical projections are responsible for preventing side-slip due to earthquakes by the action of spikes.

Furthermore, when an excessive load is applied and the height of the elastic packing is 9 mm or less,
These upper and lower cylindrical protrusions bite the base and concrete, respectively, to prevent the elastic packing from extending laterally and becoming lower, and as a result, play an important role of maintaining a height of 9 mm. This was confirmed by a pressure test comparing an elastic packing provided with four cylindrical protrusions and six cylindrical protrusions on the upper and lower sides.

Moreover, the hole of the cylindrical projection having an inner diameter of several millimeters can be used as a hole for fixing a nail when it is fixed to the foundation or the base.

In addition, as a measure against the load of the house on the elastic packing when the elastic packing 1-1, 2 is installed,
The vertical part 1-5 of the vertical plane plays a major role. It is said that the weight of a typical two-storied wooden house with a basic area of 20 tsubo is approximately 50 tons. At this time, assuming that 120 elastic packings are installed, the load applied to one sheet is 50 tons / 120 sheets = 417 kg. . As a proof against this load, it is preferable that the vertical part of the vertical surface is about one half of the height of the arcuate part of the horizontal surface, but there are some changes depending on the result of the pressure test. May be.

Based on the above, the elastic packing of the present invention will be described in further detail with reference to FIGS. In general, an anchor bolt used for fastening a foundation and a base is M12, and a length of 400L is often used. This 400L anchor bolt is the same as that described in 3.3.8 of the “Wooden Housing Construction Specification” P23.
According to item 4 of the anchor bolt, “250 mm is embedded in the concrete foundation and the remaining three threads of the bolt are secured after fastening the nut on the foundation”.

Regarding this condition, the foundation of wooden houses is generally 105 or 120 corners,
For example, in the case of 120 corners, 400L-250 (embedding depth) -120 (base) -4.5 (washer) -10 (M12
Nut)-{1.75 ((M12 thread hitch) x 3 (mountain)} ≧ 10.25mm.
By tightening the base of the 3 mm elastic packing to 10.25 mm or less and compressing it, the remaining three threads are secured after the nut is tightened.

When compressing and tightening the elastic packing 1-1, 2 with a thickness of 13mm to 10.25mm or less, the arc-shaped part from the vertical surface to the horizontal surface becomes possible by the action of elasticity, and against the shrinkage of the foundation due to aged drying On the contrary, the arc-shaped part rebounds elastically, and the floor noise is eliminated by always pushing up the contraction of the base.

Also, a plurality of loose holes for inserting anchor bolts are formed on the lateral surface of the elastic packing of the present invention.
A plurality of b, c, d, e, and f are provided by deviating from the center lines in the vertical and horizontal directions, and these are indicated by solid lines. Fig. 2-1 is an enlarged insertion hole that can be flipped horizontally or flipped vertically. With this expanded insertion port, it is possible to easily insert the anchor bolt which is displaced in design or construction, and the workability is improved.

Further, the limit value for compressing and tightening the elastic packing FIGS. 1 and 2 of the present invention on the base is as follows according to the “house construction specifications” of the Housing Finance Support Organization shown in the above 0013. When using a cat foundation, the limit value is to satisfy the numerical value of “providing ventilation holes with an effective area of 75 cm ² or more per meter over the entire circumference of the foundation”.

In general, the elastic packing of the present invention should be installed in the protruding corner, the entering corner, and the T portion on the foundation of the house, 2 to 3 at the T portion, 3 to 4 at the cross portion, and 1 within 1000 mm at the straight portion. This is a preferred example.

Temporarily, the elastic packing when the length of the vent hole of 200 mm of the present invention is compressed to 9 mm
In this case, it is possible to ventilate everything except the thickness of 0.8mm, so 0.8mm x 300mm (total length of the board) x 5 sheets = 1200mm2 (9h x 1000mm) -1200mm2 = 7800
mm2, and the ventilation area per 1m becomes 78cm ^2.

Conversely, from the calculation of 7500mm2 + 1200mm2 = 8700mm2, the height of the ventilation opening per meter is 8.7.
mm is the limit compression value of the elastic packing as seen from the ventilation area.

Regarding the length of the elastic packing of the present invention being about 200 mm, according to the “wooden house construction specification”, when building a house, “at the through pillar, a hole down (drawing) hardware near the pillar” M16 anchor bolts that are tightly coupled to the center line of the base 200mm
“Insert M12 anchor bolts for base fastening every 2.7m in the straight section in the case of two stories and every 2m in the case of three stories”.
A plurality of loose holes 1-1, 2-1 for inserting anchor bolts indicated by 031 are provided by being deviated from the center lines in the vertical and horizontal directions, and the elastic packing is reversed normally or horizontally or vertically. The expanded insertion opening 2-2 that can be formed is a length that can be efficiently installed with respect to the numerical value of the specification.

Next, when fastening the nut of the elastic packing 1-1 having a height of 13 mm according to the present invention at the upper part of the base,
The grounds for the installation with the height compressed to 10.25 mm or less are as follows: (1) There is a large difference in the bending strength of the M12 anchor bolt between the 10 mm and 20 mm gaps between the foundation and the base. (2) In Article 22-2 of the Building Standards Law Enforcement Ordinance “To provide facilities to prevent the intrusion of rats”, in section 3.3.10-2 “Under-floor ventilation” of the “Wooden Housing Construction Specification” P24
It is based on satisfying the provisions such as “Attaching a strong screen to prevent the intrusion of mice” etc. However, the numerical values for the gaps that can prevent the intrusion of rats are shown in Article 22-2 of the Building Standard Law Enforcement Ordinance. Since this is not done, the reference document indicated by 0042 is used as the basis.

For 0037 (1), the bending strength comparison test of the M12 anchor bolt is as follows.
039. Regarding this, Japanese Patent Laid-Open No. 2005-2207 by the present applicant.
36, the details of the test content graph, shape photograph, and the like are omitted.

<Test content>
1. Client: Hoshino Planning Co., Ltd. (This patent applicant)
2. Test name: M12 anchor bolt bending strength comparison test Test date: December 23, 2003 4. Test institute: Tokyo Metropolitan Industrial Technology Research Institute (currently Tokyo Metropolitan Industrial Technology Research Center)

When fastening the nut of the elastic packing 1-1 having a height of 13 mm according to the present invention at the top of the base, it is excellent in supporting the M12 anchor bolt at the time of a large earthquake by compressing and installing the height dimension to 10.25 mm or less. The function was proved by the bending strength comparison test of 0039 described above. This is the basis for setting the height dimension to 10.25 mm or less.

JP-A-2005-220736

For (2) of 0037, the height of the elastic packing of the present invention is 13 mm and the height is 10.25 mm.
Compressing and tightening below will serve as a fender. References 1, 2, and 3 are shown below as the basis.
[Reference 1] Tokyo Metropolitan Health and Welfare Bureau Health & Safety Office, Environment and Water Division website: H17.6.29
There is a description in several places in the issue “The Mouse Prevention Book for Citizens” that “A rat can pass through if there is a gap of 12.5 mm”.
[Reference 2] Send on the Kansai Electrical Safety Association website: “A mouse about 20cm long, including the tail, invades the 25mm gap on the ceiling of the cupicle.
An electrical accident occurred through a 5 mm gap, "confirmed in November 2003 by telephone.
[Reference 3] Hiromi Kanamaru “Super Rat” Tokuma Shoten: “The black rat passes even if it has a 1.5 cm hole.” “The gap between the vents under the floor should be about 1 cm.” There are several places.

The elastic packing using the steel plate of the present invention can be processed by a press machine or a roll forming machine.

It is the top view and side view of the elastic packing by embodiment of this invention. The loose hole for anchor bolt insertion of the elastic packing according to the embodiment of the present invention is represented by a solid line, and the expanded insertion hole obtained when the elastic packing of the present invention is regularly or horizontally reversed or vertically reversed is represented by a dashed line FIG.

1-1 Plan view of the elastic packing for ventilation.
-2 Side view of the elastic packing for ventilation.
-3a, 3b, 3c, 3d, 3e, 3f These are arc-shaped parts on the lateral surface.
-4a, 4b The horizontal part of the horizontal surface.
-5 Vertical section of the vertical plane.
-6a Horizontal flange on the end face.
-6b Bend R part of the end face.
-7 Cylindrical protrusion.
-8a, 8b, 8c, 8d, 8e, 8f Loose hole for anchor bolt insertion.
-9 Loose hole left and right in the longitudinal direction, the range is indicated by /////.
2-1 Plan view of the elastic packing for ventilation.
-2a, 2b, 2c, 2d, 2e, 2f Loose hole for anchor bolt insertion (shown by solid line).
-3 The enlarged entrance (shown with a dashed line).
hv Longitudinal center line (indicated by a two-dot chain line).
Sv A center line in the width direction (indicated by a two-dot chain line).

Claims (4)

Used as a ventilation member under the floor between the foundation of the building and the foundation, with a width of about the same as the foundation, with a square shape as a whole, a plate thickness of about 1 mm, and a ventilation surface height of 9 mm ~
An underfloor aeration packing having a size of about 14 mm, wherein the aeration packing is provided with a plurality of arc-shaped portions having different R dimensions and a plurality of horizontal portions having different lengths arranged on a lateral surface where irregularities are repeated. When the nut is fastened to the anchor bolt raised from the foundation at the upper part of the foundation, the ventilation packing has the function of fouling by compressing and elastically deforming the ventilation surface around 14 mm in height. It resists bending pressure on anchor bolts in the event of a large earthquake and improves the seismic resistance of the frame. Thickness, arc-shaped part, horizontal part and height are closely related, such as preventing floor squealing due to foundation shrinkage due to aged drying, and it has many functions in addition to ventilation function Elastic packing for under-floor ventilation. The ventilation packing according to claim 1, wherein a steel plate is used as a material, and a plurality of arcuate portions having a height of around 14 mm are formed on a repetitive uneven surface in which the vertical surface and the horizontal surface are alternately connected. Is an elastic packing for underfloor ventilation, which has an elastic function and has a structure in which a minimum ventilation area can be secured in a plurality of horizontal portions having a height of about 9 mm. The ventilation packing according to claim 1, wherein an oval loose hole for inserting an anchor bolt rising from a foundation is provided in a portion that moves from a vertical surface to a horizontal surface in which unevenness is repeated. Elasticity for under-floor ventilation, characterized by having a crosspiece of width and providing an oval loose hole on the side surface between the crosspieces to prevent crevice during press working and reduce mold maintenance work Packing. The ventilation packing according to claim 1, wherein a plurality of oval loose holes for inserting anchor bolts having different widths are provided on the upper and lower lateral surfaces so as to be deviated from the longitudinal and lateral center lines, and are started from the foundation. The under-floor ventilation elasticity is improved by placing the ventilation packing into an enlarged insertion port that can be inserted through the right or left-right or upside-down without difficulty. Packing.

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