JP2000104352A - Underfloor ventilating opening of continuous footing and execution method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the underfloor ventilating opening of a continuous footing, by which the execution of works for the underfloor ventilation opening is conducted simply at the time of execution of the continuous footing and in which a cover body can be fitted surely into the underfloor ventilating opening remaining after the solidification of ready-mixed concrete. SOLUTION: The underfloor ventilating opening of the continuous footing has a drum body section 30, which is buried in the continuous footing 11 and the inside of which is formed in the cylindrical shape of a cavity, and a mesh section 34 being installed into the other opening of the drum body section 30 and permitting the flowing of air. The underfloor ventilating opening is composed of a suspending section 35 fixed around the drum body section 30 for hanging to the reinforcing bar 18 of the continuous footing 11 and a ventilating cover body being detachably fitted into one opening of the drum body section 30 and permitting the flowing of air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underfloor ventilation opening of a cloth foundation for installing under a floor, which is installed on a cloth foundation of a building, and a method of constructing the same.

[0002]

2. Description of the Related Art When constructing a building such as a house, first, foundation work for the ground is performed. It is common sense to build a solid foundation by foundation work, place pillars and foundations on the foundation, and assemble the building. This is because it is important to prevent land subsidence and keep the building level. This foundation has a cloth foundation and an independent foundation, and it is customary to use a cloth foundation all around the outer wall of the building. A series of cloth foundations surround the lower part of the outer wall of the building to prevent rainwater from entering under the floor. This cloth foundation is provided with underfloor ventilation openings at predetermined intervals, and underfloor ventilation openings are always open on all sides of the building. The underfloor vents allow outside air to flow into the underfloor space. By flowing the dry air under the floor, it is possible to prevent moisture from being trapped under the floor and to prevent the wood of the pillars and the base from corroding.

[0003] The underfloor vents of this cloth foundation have conventionally had many square cross-sectional openings. In order to manufacture this square underfloor vent on a cloth foundation, a square frame is fitted into a pair of parallelly arranged molds to form a space in which the ready-mixed concrete does not flow. After that, when the ready-mixed concrete is poured into the formwork, the ready-mixed concrete does not flow into the square frame, but the ready-mixed concrete is solidified by the thickness of the formwork to complete the fabric foundation. Then, when the formwork and the square frame are removed, a "U" -shaped space is left as if it were cut out from the upper surface of the concrete fabric foundation. When the base wood is placed in close contact with the upper end of the fabric base, the square U-shaped space and the base create an underfloor vent with a square opening. In addition, iron fences and insect nets made of wire mesh are arranged in such underfloor vents to prevent small animals and insects from entering under the floor. In the case of an underfloor ventilation port having a square cross section having such a shape, it is necessary to fix the square frame to the formwork when manufacturing the underfloor ventilation port, and the operation is complicated. The underfloor ventilation port manufactured as described above has a weak cross-sectional shape, so that stress is applied to the corners and thus the strength is low, and cracks and the like are easily generated.

[0004] For this reason, underfloor ventilation openings having a round opening cross section have recently been constructed. In order to construct a round underfloor vent, a PVC or paper round pipe is cut to the length of a mold, and the round pipe is fitted between a pair of molds. Pour ready-mixed concrete between formwork,
Once the concrete has set, withdrawing these round pipes will leave a round underfloor vent on the concrete fabric foundation. If this round underfloor vent is left open as it is, small animals and insects can penetrate under the floor through the hole, and thus a ventilated lid is usually fitted into the underfloor vent. In many cases, the lid was formed of cylindrical plastic, and its end was closed with a bar or a net. By fitting the lid into a round underfloor vent, air can flow but small animals and insects can be prevented from entering. Furthermore, in the evolved mechanism,
Some lids have a function of adjusting the amount of air flowing under the floor according to temperature by opening and closing the blades using a shape memory alloy.

[0005] With such a construction method, the underfloor vent having a round cross-sectional shape can be relatively easily manufactured. However, the round underfloor vent is provided with a lid to prevent air circulation and small animal invasion. Must be fitted,
The lid formed of plastic did not always fit exactly into the round hole formed by pouring ready-mixed concrete. In this case, if the outer diameter of the lid is smaller than the inner diameter of the round hole, the lid will be easily removed after installation, and will not function as the lid. Also,
Before pouring the ready-mixed concrete, the round pipe must be fixed to the formwork and reinforcing steel, but this work requires the round pipe to be attached with wires, etc., which requires fine manual work, which is complicated. Was.

[0006]

As described above, the conventional square underfloor vent has a drawback in strength and the round underfloor vent cannot be completely connected to the lid. For this reason, when constructing the cloth foundation, the work for the underfloor vent can be easily performed, and the lid can be securely fitted into the underfloor vent that remains after the ready-mixed concrete has solidified. The development of an underfloor vent was desired. In addition, the underfloor ventilation holes formed in the cloth foundation can store medicines and fragrances and have a function of preventing pests from entering under the floor, so that the building can be maintained for a long time.

[0007]

According to the present invention, there is provided a body portion having a hollow cylindrical shape embedded in a fabric base, and a mesh portion provided at the other opening of the body portion to allow air to flow. , A hanging portion fixed around the body portion to be hooked on the reinforcing bar of the cloth foundation, and a ventilation lid body detachably fitted to one opening of the body portion to allow air flow. The underfloor ventilation opening of the cloth foundation, which is a feature (claim 1).

According to the present invention, there is provided a cylindrical body having a hollow interior, which is embedded in a fabric base, and is connected to the other opening of the body, the outer shape of which is a truncated triangular pyramid, and the interior is hollow. A tapered part, a mesh part provided at the rear end of this tapered part to allow air flow, a hanging part fixed around the body part to be hooked on the reinforcing bar of the cloth foundation, and detachable to the opening of the body part An underfloor ventilation opening of a cloth foundation characterized by being freely fitted and configured with a ventilation lid that allows the flow of air.

According to the present invention, there is provided a cloth-floor underfloor vent, wherein the hanging portion fixed to the outer periphery of the body portion is fixed to be offset from the center of gravity of the body portion to the opening side thereof. (Claim 3).

According to the present invention, the suspension portion fixed to the outer periphery of the body portion is slightly L-shaped, and protrudes downward in the longitudinal direction of the lower surface in contact with the upper surface of the reinforcing bar. This is a cloth-floor ventilating hole under the floor, provided with a contact ridge (claim 4).

According to the present invention, the hanging portion fixed to the outer periphery of the body has a slightly L-shaped tip bent toward the body, and the tip approaches the outer periphery of the body by elastic force. The underfloor ventilation opening of a cloth foundation characterized by the following (claim 5).

According to the present invention, the suspension portion fixed to the outer periphery of the body has a pair of slightly L-shaped shapes, and both are arranged parallel to the outer periphery of the body at intervals. This is an underfloor ventilation opening of a cloth foundation (claim 6).

According to the present invention, the underfloor ventilation port has a hollow interior and a cylindrical shape, and a ventilation cylinder having a hanging portion fixed to an outer periphery thereof, and is detachably fitted to an opening of the ventilation cylinder. It consists of a ventilation lid that allows air flow, hooks a hanging part on the horizontal part of a reinforcing bar that stands upright on the ground, suspends the ventilation cylinder, and both sides of the reinforcement while the ventilation cylinder is suspended The molds are arranged from, the respective molds are brought into close contact with the openings of the ventilation cylinder, the ready-mixed concrete is poured between the two molds, and after the molding is completed, the molds are removed and the ventilation cylinders that are open A method of constructing an underfloor ventilation opening of a cloth foundation, characterized by fitting a ventilation lid (claim 7).

[0014]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 to FIG. 9 show the first embodiment of the present invention, and FIG. 1 is a perspective view in which a part of the underfloor ventilation opening formed in the cloth base 11 is sectioned. A part of the cloth base 11 shown in FIG. 1 is cut away, and the reinforcing bar disposed inside is exposed and shown.

The cloth base 11 has a conventionally known cross-section having an inverted T-shape, and is solidified by pouring ready-mixed concrete into a mold and then curing. This cloth foundation 11 is composed of a horizontal part 12 and a vertical part 13. The horizontal portion 12 is formed by pouring ready-mixed concrete into the ground (ground), and has a wide band shape. The vertical portion 13 has a wall shape that stands vertically at the center of the upper surface of the horizontal portion 12. The horizontal portion 12 is formed by pouring ready-mixed concrete into a formwork, and then a formwork is installed on the upper surface of the horizontal portion 12 to pour ready-mixed concrete to form a vertical portion 13. The horizontal portion 12 and the vertical portion 13 are integrated, and the cross section of the cloth base 11 is formed in an inverted T-shape by the both.

Reinforcing bars are inserted into the horizontal portion 12 and the vertical portion 13 of the cloth base 11 to reinforce concrete. As shown on the left side of FIG. 1, a lower main bar 14 having a slightly large diameter is arranged in the center of the horizontal portion 12 in the horizontal direction, and a pair of base auxiliary bars 16 is provided on the left and right sides of the lower main bar 14 at intervals. Is arranged. And lower main bar 1
4 and the length of the base auxiliary muscle 16 are perpendicular to the base muscle 1
The lower main bar 14 and the base auxiliary bar 16 are connected to the base bar 15 by welding. In addition, a slightly thicker upper main bar 18 is disposed in the upper part of the vertical portion 13 in the horizontal direction, and a slightly smaller abdominal muscle 19 is provided in the middle of the vertical portion 13.
Is arranged. A stirrup 17 having a small diameter is arranged between the upper main bar 18 and the lower main bar 14 so as to be vertical.
The upper main muscle 18, the lower main muscle 14, and the abdominal muscle 19 are connected to the stirrup 17 by welding, respectively. Due to such a structure of the reinforcing bar, the lower main bar 14, the base bar 15, the base auxiliary bar 16, the stirrup 17, the upper main bar 18, and the abdominal bar 19 are welded before the ready-mixed concrete is poured into the formwork (not shown). Assembled to be independent. These reinforcing bars are arranged in an inverted T-shape and embedded in the concrete, thereby reinforcing the cloth foundation 11 so as not to be broken by an earthquake or the like.

On the right side of FIG. 1, there is shown a cloth foundation 11 formed by pouring ready-mixed concrete into a formwork and wrapping a reinforcing bar. A ventilation cylinder 21 is embedded in the side surface of the vertical portion 13 of the cloth base 11, and the ventilation cylinder 21 is opened through the front and rear, and in FIG. The inside is hollow so as to allow the flow of air. One end of the ventilation cylinder 21 is open, and the opening matches the outer surface of the vertical portion 13 (the front surface in FIG. 1). A ventilation lid 22 having a disk shape and having a plurality of ventilation holes can be fitted into the opening of the ventilation cylinder 21 from the outside thereof. Is configured.

To fix the ventilation cylinder 21 to the vertical portion 13, the ready-mixed concrete is placed before being poured into the formwork, and the ready-mixed concrete is embedded around the ventilation cylinder 21 so as to surround it. For concrete construction, after the rebar is set up vertically, the ventilation cylinder 21
And form frames are arranged so as to sandwich the rebar and the ventilation cylinder 21 from both sides. The fresh concrete is poured into the formwork arranged in this way, and when the concrete is solidified, the formwork is removed, so that the ventilation cylinder 21 is kept in the vertical portion 13.
And the ventilation cylinder 21 is firmly left inside the vertical portion 13. Since air is allowed to flow around the ventilation cylinder 21, air can freely flow around the vertical portion 13. Then, a disc-shaped ventilation lid 22 is fitted into the opening on the outside of the ventilation cylinder 21 in order to prevent small animals and insects from entering under the floor. In addition, since the inside of the ventilation cylinder 21 embedded in the vertical portion 13 is hollow, it is possible to arrange a bag containing chemicals (such as an insect repellent) or a fragrance inside the ventilation cylinder 21. it can. Then, for periodic inspection and maintenance, the ventilation lid 22 can be removed from the ventilation cylinder 21 and the bag containing the medicine and the fragrance can be replaced with a new one.

Next, FIGS. 2 and 3 explain in detail the structures of the ventilation cylinder 21 and the ventilation lid 22 constituting the underfloor ventilation port 24 described above. FIG. 2 is a perspective view in which the ventilation cylinder 21 and the ventilation lid 22 are separated and slightly separated from each other. FIG. 3 is a cross-sectional view of the ventilation cylinder 21 and the ventilation lid 22 cut in the vertical direction.

The ventilation cylinder 21 is made of plastic or the like and is formed integrally by injection molding. A large part of the center of the ventilation cylinder 21 is a body part 30 having a hollow thin pipe shape inside. Both ends of the body part 30 are largely open, and a front end of the body part 30 (see FIGS. 2 and 3). The right side) is opened as a front opening 32.
A tapered portion 31 is formed continuously at the rear end (left side in FIGS. 2 and 3) of the body portion 30. The outer diameter of the tapered portion 31 is the same as the outer diameter of the front portion (left side in FIGS. 2 and 3) and the outer diameter of the tapered portion 31 toward the rear side (left direction in FIGS. 2 and 3). Are formed so as to gradually decrease in diameter, and have an outer shape of a thin-walled truncated cone. Since the outer shape of the tapered portion 31 is inclined, the rear end of the tapered portion 31 has a rear opening 33 whose inner diameter is smaller than the inner diameter of the front opening 32. After this, the opening 33
A mesh portion 34 in which a thin cross bar is stretched horizontally and vertically over one surface of the opening is arranged. The mesh portion 34 allows air to flow, but has a mesh size enough to prevent small animals and insects from moving.

Further, a suspension portion 35, which is slightly L-shaped when viewed from the side, is fixed to one portion of the outer periphery of the body portion 30. The hanging portion 35 is composed of an upright piece 36 projecting perpendicularly to the outer periphery of the body 30 and a hooking piece 37 connected to the tip of the upright piece 36 at a right angle. The upright piece 36 and the hooking piece 37 are formed so as to have the same width and an L-shape.
In the direction of. Upright piece 3 of this hanging portion 35
Numeral 6 is fixed to a position close to the front opening 32, and the upright piece 36 is offset from the center of the ventilation cylinder 21 to the front side (the right side in FIGS. 2 and 3). The body portion 30, the tapered portion 31, the mesh portion 34, and the hanging portion 35 are formed so as to be integrated by die cutting.

The ventilation lid 22 is also integrally formed of plastic or the like by injection molding. The outer periphery of the ventilation lid 22 is constituted by a pipe-shaped insertion portion 40 having a hollow inside, and the outer diameter of the insertion portion 40 substantially matches the inner diameter of the front opening 32 described above. It can be inserted through the front opening 32 and fitted inside the body 30. A ring-shaped flange portion 41 is integrally connected to the outer periphery of the front surface (the right surface in FIGS. 2 and 3) of the insertion portion 40. The inner diameter of the flange portion 41 is the inner diameter of the insertion portion 40. Is set the same as. The outer periphery of the flange portion 41 is set to be larger than the outer periphery of the insertion portion 40, and the side surface of the flange portion 41 is enlarged so as to be perpendicular to the outer peripheral surface of the insertion portion 40. Therefore, when the insertion portion 40 is fitted into the body portion 30, the side surface of the flange portion 41 comes into close contact with the end surface of the body portion 30, and the ventilation lid 22 is held and fixed at this position. One end of an elongated spoke portion 42 at an equal angle is fixed to the inner peripheral surface of the flange portion 41, and the other ends of the plurality of spoke portions 42 are arranged so as to extend toward the center of the flange portion 41, respectively. . The other end of each spoke portion 42 is connected to a central hub 43 at the center of the flange portion 41, and the flange portion 41, the spoke portion 42, and the central hub 43 are configured like wheels of a bicycle. With this configuration, air can flow through the gaps between the plurality of spoke portions 42 arranged radially, and small animals can be prevented from passing through.

Further, the shape of the hanging portion 35 will be described in more detail with reference to FIG. FIG. 4 is a partial perspective view showing the vicinity of the upper portion of the ventilation cylinder 21 in an enlarged manner.

In the hanging portion 35, a thin and wide upright piece 36 is fixed so as to be perpendicular to the outer periphery of the body 30. A hooking piece 37 is connected to the upper end of the upright piece 36 at a right angle. An upright piece 36 and a hooking piece 37 form an L-shaped hanging portion 35. The hook pieces 37 are arranged parallel to the outer periphery of the body 30 and have a shape like a handle of a coffee cup. This hook piece 3
7, the center of the inner surface (the surface facing the outer periphery of the body 30)
A groove 38 that is shallowly dug down in the length direction is formed. On the left and right sides of the inner surface of the hooking piece 37, a pair of contact ridges 39 is projected in the length direction thereof, and the two contact ridges 39 are arranged so as to be parallel. The ridge 39 has an arc-shaped cross section.

Next, FIG. 5 and FIG. 6 show how the ventilation cylinder 21 is combined with a reinforcing bar when the cloth foundation 11 shown in FIG. 1 is constructed. .
FIGS. 5 and 6 show a state in which ready-mixed concrete is poured into the lower part of the cloth foundation 11, the horizontal part 12 is formed first, and then a formwork for constructing the vertical part 13 of the cloth foundation 11 is arranged on the upper surface of the horizontal part 12. This is a state before the operation. FIG.
6 is a cross-sectional view taken along the line AA in FIG. 6, and FIG. 6 shows the horizontal portion 12 and the reinforcing bar viewed from the front.

FIGS. 5 and 6 show the reinforcing bars already assembled by welding, ie, the lower main bar 14 and the base bar 1.
5. A frame-shaped structure in which a cross section is assembled in an inverted T-shape with base auxiliary muscle 16, stirrup 17, upper main muscle 18, and abdominal muscle 19 is arranged, and the reinforcing bar is embedded in horizontal portion 12. It is. In FIGS. 5 and 6, fresh concrete is poured so as to include the lower main reinforcement 14, the base reinforcement 15, and the base auxiliary reinforcement 16, and the horizontal portion 12 is formed by solidifying the raw concrete. The horizontal portion 12 is set on the ground 50, and the bottom portion of the cloth base 11 is already completed.

In the state shown in FIGS. 5 and 6, stirrups 17 are held upright at the center of the flat horizontal portion 12 at intervals in the longitudinal direction. The main muscle 18 and the abdominal muscle 19 are fixed in the horizontal direction. The upper main muscle 18 and the abdominal muscle 19 are held by the stirrup 17 standing upright. When the horizontal portion 12 is constructed and this state is attained, the hanging portion 35 of the ventilation cylinder 21 is engaged with the upper main bar 18, and the ventilation tube 21 is hung by the hanging bar 35 on the upper main bar 18. Lower. As shown in FIG. 6, the torso portion 30 is arranged in a space between the upper main muscle 18 and the abdominal muscle 19, and the entire ventilation cylinder 21 is suspended by the suspension portion 35. In this manner, in the state where the ventilation cylinder 21 is suspended, the position where the upper main bar 18 contacts the inner periphery of the suspension portion 35 is near the intersection of the upright piece 36 and the hooking piece 37, and 21 is located on the front side of the center of gravity.
Then, as shown in FIG. 5, the ventilation cylinder 21 has its front opening 32 slightly upward, the rear opening 33 of the tapered portion 31 slightly downward, and the ventilation cylinder 21 as a whole is held in an inclined state. Will be.

The function of hanging the ventilation cylinder 21 on the upper main muscle 18 will be described in detail with reference to FIG. Hanging part 35
When the upper main bar 18 is inserted into the gap between the hook piece 37 and the body part 30, the ventilation cylinder 21 is lowered by its own weight, and the hook piece 3
The lower surface of 7 contacts the upper surface of upper main bar 18. In this contact, the curved lower ends of the pair of contact ridges 39 come into contact with the surface of the upper main bar 18, respectively. For this reason, the lower surface of the hooking piece 37 comes into contact with the upper main bar 18 not at one point but at two points of the contact protruding ridge 39 spaced apart. Then, even if the ventilation cylinder 21 is swung in the left and right direction B in FIG. 7, when the ventilation cylinder 21 returns to be vertical by its own weight, the pair of contact ridges 39 is always on the upper surface of the upper main muscle 18. It touches and stops at that position without vibrating left and right. Thus, the ventilation cylinder 21 is automatically suspended vertically without being swung in the B direction by the pair of contact protrusions 39 arranged at intervals being in contact with the horizontal upper surface of the upper main bar 18.

After the work of hanging and hanging the ventilation cylinder 21 at appropriate intervals on the upper main bar 18 has been completed, the work of placing the formwork on the horizontal portion 12 is then performed.
Preparation for forming the vertical portion 13 is performed. In this work, as shown in FIG. 8, while the ventilation cylinder 21 is suspended from the upper main muscle 18, the molds 54 and 55 formed of plastic or timber are vertically placed on the left and right of the upper surface of the horizontal portion 12. Place. The molds 54 and 55 are formed in a panel shape which has been conventionally used. The lower surfaces of the molds 54 and 55 are placed on the upper surface of the horizontal portion 12, and the respective side surfaces of the molds 54 and 55 are formed. To the stirrup 17, upper main muscle 18, and abdominal muscle 19. At this time, the side of the mold 54 is the ventilation cylinder 2
The side surface of the mold 55 is closely attached to the rear opening 33 of the ventilation cylinder 21. Then, as shown in FIG. 8, on the upper surface of the horizontal portion 12, the molds 5 arranged on the left and right are arranged.
A groove-shaped space is formed by 4 and 55, and the front and rear openings of the ventilation cylinder 21 are closed by the molds 54 and 55, respectively.

As described above, the ready-mixed concrete is poured in the direction B from above the space formed by the molds 54 and 55 to fill the groove-shaped space up to the upper portions of the molds 54 and 55. Although the fresh concrete also fills the periphery of the ventilation cylinder 21, the front opening 32 and the rear opening 33 are closed by the side surfaces of the formwork 54 and 55, respectively, as described above. Ready-mixed concrete does not flow into the internal space of. When ready-mixed concrete is poured between the molds 54 and 55 and solidified, the molds 54 and 55 are removed to the left and right, and the vertical portions 13 are formed. This vertical part 13 is shown in FIG.
As shown in the figure, the upper surface of the horizontal portion 12 has a wall shape vertically raised, and forms an inverted T-shaped structure integrally with the horizontal portion 12. Since the horizontal portion 12 and the vertical portion 13 are made of the same type of concrete, they are united and joined together,
The cloth base 11 will be formed.

The vertical portion 13 remains after the molds 54 and 55 are removed. However, since the ready-mixed concrete does not flow into the front opening 32 and the rear opening 33 of the ventilation cylinder 21 described above, Are open, and the openings of the front opening 32 and the rear opening 33 are located on the same plane as the side surface of the vertical portion 13. In this way, the vertical portion 13 is formed as shown in FIG. 9, becomes a wall made of concrete, and stands vertically, but since the front opening 32 and the rear opening 33 of the ventilation cylinder 21 are open, the vertical portion 13 It does not obstruct the flow of air from the front and rear surfaces. When the ready-mixed concrete is solidified, the stirrup 17, the upper main bar 18, and the abdominal bar 19 are wrapped and stored inside, and at the same time, the ventilation cylinder 21 is
Is left inside and embedded together.

FIG. 1 shows a state in which the ready-mixed concrete is solidified, the ventilation tube 21 is embedded and the vertical portion 13 is formed. Thereafter, the insertion portion 40 of the ventilation lid 22 is inserted into the opening of the front opening 32, and the front opening 32 is shielded by the ventilation lid 22. The outer diameter of the insertion portion 40 is the front opening 32
Since the inner diameter is the same as the inner diameter of the front opening 32, it is possible to easily insert and fit the insertion portion 40, and when the entire length of the insertion portion 40 is inserted into the front opening 32, the side surface of the flange portion 41 comes into close contact with the end surface of the body portion 30, Can no longer be inserted. In addition,
Before the ventilation lid 22 is fitted into the ventilation cylinder 21, a bag containing, for example, an insect repellent or a fragrance may be inserted into the internal space of the body 30 of the ventilation cylinder 21. By disposing a bag containing an insect repellent, a fragrance, and the like in the body 30, fine pests can be prevented from entering under the floor from the gaps between the spokes 42 and the mesh 34. The effectiveness of the insect repellent and the fragrance in the bag inserted into the body 30 decreases with time, but the ventilation lid 22 is periodically removed from the ventilation cylinder 21 and the front opening 32 is removed. Withdrawing the bag and replacing it with a new one will maintain long-term efficacy.

Next, FIG. 10 shows a second embodiment of the present invention. FIG. 10 shows a modified example of the ventilation cylinder 21 shown in FIG. 2, and a ventilation cylinder 59 corresponding to the ventilation cylinder 21 is shown.

The ventilation cylinder 59 has a body 60 having a hollow pipe shape and a tapered portion 61 connected to the rear end of the body 60. The body 3 shown in FIGS.
0 and the same shape as the tapered portion 31. The front side (the right side in FIG. 10) of the body portion 60 is a large front opening 62, and the rear side (the left side in FIG. 10) of the tapered portion 61 is a rear opening 63. Thereafter, the opening 63 has a mesh portion 6 in which a narrow bar is stretched horizontally and vertically over one surface of the opening.
4 are arranged, and the mesh portion 64 allows the flow of air, but prevents the invasion of small animals and insects.

A hanging portion 65 is fixed to the side surface of the body portion 60. The hanging portion 65 is composed of a protruding portion 66, an engaging piece 67 and a spring piece 68. At the same time, they are integrally formed of plastic or the like by injection molding. A wide protruding portion 66 is protruded at a position deviated to the front side (the right side in FIG. 10) of the above-mentioned body portion 60, and the front end of the protruding portion 66 is directed at right angles. The engagement pieces 67 are connected to each other, and are formed so as to be L-shaped when viewed from the side by the protrusions 66 and the engagement pieces 67. The tip of the engagement piece 67 (FIG. 10)
(The left end in the drawing) has a spring piece 68 having the same width as the engagement piece 67.
Are connected, and the spring piece 68 extends rearward of the ventilation cylinder 59. The spring piece 68 is gently bent so as to approach the side surface of the body part 60 as it goes backward, and its tip is slightly inverted and bent in the opposite direction. The shaped tip portion elastically contacts the side surface of the body portion 60. The protrusion 66 and the engagement piece 67 form an L-shape when viewed from the side, and the engagement piece 67 and the spring piece 68 form a gentle arc. The curved lower surface of the spring piece 68 is in contact with the side surface of the body 60, and the projection 66, the engagement piece 67, and the spring piece 68 form a slightly trapezoidal closed space on the side of the body 60. This means that the closed space has a cross-sectional shape that allows the upper main bar 18 to be inserted. Further, the engagement piece 67 and the spring piece 68 are in the shape of an elongated thin plate, and have elasticity in themselves, so that the closed space can be opened by lifting the tip of the spring piece 68.

The ventilation cylinder 5 according to the second embodiment
9 is suspended on the upper main bar 18 by placing a finger on the tip of the spring piece 68 and moving the spring piece 68 against the body 60 against its elasticity.
Open your mouth away from the side of Then, the spring piece 68 is separated from the side surface of the body 60, and the protrusion 66 and the engagement piece 67
The L-shaped space formed by
The upper main bar 18 extends between the open spring piece 68 and the body 60.
And the upper main bar 18 can be inserted into the space between the protrusion 66 and the engagement piece 67. The upper main bar 18 is
When the spring piece 68 supported by the finger is released, the spring piece 68 comes into close contact with the side surface of the body part 60, and the opened opening is closed. Is done. When the spring piece 68 returns, the protrusion 6
The upper main muscle 18 is accommodated in a closed space formed by the engaging piece 67, the engagement piece 67, and the spring piece 68, and there is an effect that the ventilation cylinder 59 is not easily separated from the upper main muscle 18. Due to such a structure, once the ventilation cylinder 59 is once engaged with the upper main bar 18 and suspended, the ventilation cylinder 59 does not easily fall from the upper main bar 18 and a reinforcing bar or the like is required during foundation work. The ventilation cylinder 59 does not come off the upper main muscle 18 even if it is vibrated by touching.

FIG. 11 shows a third embodiment of the present invention. FIG. 11 shows a modified example of the ventilation cylinder 21 shown in FIG. 2, and the ventilation cylinder 21 corresponds to the ventilation cylinder 79.
It is.

The ventilation cylinder 79 has a body 80 having a hollow pipe shape and a tapered portion 81 connected to the rear end of the body 80. The body 3 shown in FIGS.
0 and the same shape as the tapered portion 31. A front side (right side in FIG. 10) of the body part 80 is a large front opening 82, and a rear side (left side in FIG. 11) of the tapered part 81 is a rear opening 83. Thereafter, the opening 83 is provided with a mesh portion 8 in which a narrow bar is stretched horizontally and vertically over one surface of the opening.
4 are arranged, and the mesh portion 84 allows air to flow, but prevents the invasion of small animals and insects.

A pair of suspension portions 85 and 86 are fixed to the side surface of the body portion 80 at intervals. Hanging part 8
5 includes a thin wide plate-shaped protruding piece 87 and an engaging piece 89, and the hanging portion 86 includes a thin wide plate-shaped protruding piece 88 and an engaging piece 90. ing.
These projecting pieces 87 and 88 are vertically fixed to the front side (the right side in FIG. 11) of the side surface of the body portion 80. The engaging piece 89 is connected at a right angle from the upper end of the protruding piece 87, and is configured to be L-shaped when viewed from the side. The engaging piece 90 is connected at a right angle from the upper end of the protruding piece 88, and is configured to be L-shaped when viewed from the side. The pair of suspension portions 85 and 86 are fixed to the side surface of the body portion 80 with a slight distance therebetween, and are respectively located slightly below the top of the body portion 80 as shown in FIG.
The pair of engaging pieces 89 and 90 are also arranged with a space therebetween, and the respective engaging pieces 89 and 90 are arranged so that their respective planes are parallel and located on the same plane. . Thus, when the pair of hanging portions 85 and 86 are fixed to the body portion 80, the shape is such that the two claws are arranged rearward of the body portion 80. The lower surfaces of the engagement pieces 89 and 90 are located above the top of the body portion 80, and are arranged so that there is a space below a plane connecting the lower surfaces of the engagement pieces 89 and 90. It is.
These body part 80, taper part 81, mesh part 84,
The hanging portions 85 and 86 are formed by injection molding so as to be integrated with plastic or the like.

The ventilation cylinder 7 in the third embodiment
In order to suspend the 9 from the upper main bar 18, the upper main bar 18 is inserted into a gap between the lower surfaces of the engagement pieces 89 and 90 and the top of the body 80. Then, the upper surface of the upper main reinforcement 18 comes into contact with the lower surfaces of the engagement pieces 89, 90, and the entire ventilation cylinder 79 is hung on the upper main reinforcement 18 by the engagement pieces 89, 90. In this suspension, since each suspension part 85, 86 is arranged in parallel at intervals, it will be suspended on the left and right of the center of gravity of the ventilation cylinder 79, and the ventilation cylinder 79 is vertically stabilized. Hanging. For this reason, the engaging pieces 89 and 90 are
The ventilation cylinder 79 is reliably hung at the position where it is hooked, and the center axis of the ventilation cylinder 79 does not tilt due to vibration generated during construction. In this ventilation cylinder 79, if the space between the two suspension portions 85 and 86 is widened, the ventilation cylinder 79 can be suspended more stably.

[0041]

Since the invention of the present application is constructed as described above, a cylindrical air flow opening can be constructed simultaneously with the foundation work by embedding the body in the concrete of the cloth foundation. The underfloor ventilation opening can be easily completed by fitting the ventilation lid. A mesh is formed at the back of the body, and the ventilation lid allows air to flow, so air can flow before and after the fabric foundation, and pests such as small animals and insects can enter under the floor. Can be prevented. In addition, since the opening of the body has a standardized shape, it is easy to fit the ventilation lid, and the ventilation lid does not fall out of the opening or fit. The ventilation lid can be removably fitted into the opening of the body, and a bag containing a medicine or a fragrance can be inserted into the inside of the body. Can be easily replaced.

Further, since a tapered portion having a truncated triangular pyramid shape whose outer diameter is reduced is continuously connected to the rear portion of the body portion, an inner wall which is inclined from the outside toward the floor below is formed inside. This means that insects such as pests cannot climb the tapered portion and can be prevented from entering under the floor.

A slightly L-shaped hanging portion is fixed to the side surface of the body, and the body can be held by the reinforcing bar by hooking the hanging portion on a reinforcing bar. Because this suspension is offset from the center of gravity of the body, it is located at a position deviated from the center of gravity.
It is held obliquely upward with the opening of the body part, and is suspended without easily falling off the rebar.

The hanging portion fixed to the side surface of the body has a slightly L-shape, and contact ridges are provided on the left and right sides of the inner periphery in contact with the upper surface of the reinforcing bar. The body is held in contact with the upper surface of the reinforcing bar. Since this contact is not made at one place but at two places on the left and right, the body can be stably suspended from the rebar without being swung right and left.

The hanging portion fixed to the side surface of the body portion is slightly L-shaped, and its tip is bent with elastic force so as to contact the side surface of the body portion. In order to suspend the body from the reinforcing bar, the tip of the hanging portion is opened against elasticity, and the reinforcing bar can be inserted into the opening.
For this reason, after the reinforcing bar is inserted into the space of the L-shaped hanging portion, the tip of the hanging portion returns to the side surface of the body portion by its elastic force, and returns to surround the reinforcing bar. For this reason, the reinforcing bar is wrapped in the space of the hanging portion, and does not easily fall even if the reinforcing bar vibrates, so that the reinforcing bar can be reliably held.

Further, since two slightly L-shaped hanging portions are fixed to the side surface of the body portion, the body portion can be hung from the left and right upper portions by hooking both hanging portions on a reinforcing bar. Therefore, even if the reinforcing bar vibrates, the body is stably suspended and does not swing right and left.

In order to construct an underfloor ventilation port using this cylindrical ventilation cylinder, a hanging portion is hooked on a horizontal reinforcing bar disposed on the ground, and then a formwork is provided on both sides of the reinforcing bar. Is placed, and the side surfaces of the mold are brought into close contact with the front and rear openings of the ventilation cylinder. And pour ready-mixed concrete into the formwork,
The ventilation cylinder is embedded in the concrete. When the formwork is separated from the completed fabric foundation, the openings of the ventilation cylinders are arranged on the surface of the fabric foundation and do not hinder the flow of air before and after the fabric foundation. The installation of the ventilation cylinder in this foundation work does not require fixing a square formwork by carpentry work or attaching a round pipe as in the prior art, and is merely an operation of hooking on a reinforcing bar, which facilitates the work. Further, when the mold is removed after the ready-mixed concrete is solidified, the completely circular opening of the ventilation cylinder is exposed, and the fitting of the ventilation lid is ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cloth foundation showing a cloth foundation according to the present invention, in which a part of the cloth foundation is shown in section, showing a cloth foundation in which an underfloor ventilation opening is arranged.

FIG. 2 is a perspective view showing the underfloor ventilation port according to the first embodiment of the present invention, in which a ventilation cylinder and a ventilation lid are separately shown.

FIG. 3 is a sectional view showing the underfloor ventilation opening according to the first embodiment of the present invention, which is cut and shown at the center of a ventilation cylinder and a ventilation lid.

FIG. 4 is an enlarged perspective view showing the underfloor ventilation port according to the first embodiment of the present invention and showing the vicinity of a hanging portion of the ventilation cylinder in detail.

FIG. 5 is a longitudinal sectional view showing a procedure for installing a cloth foundation with the underfloor ventilation opening according to the first embodiment of the present invention, showing a state in which a ventilation cylinder is hooked on a reinforcing bar.

FIG. 6 is a front view showing a procedure of constructing a fabric foundation with the underfloor ventilation opening according to the first embodiment of the present invention, and showing a state in which a ventilation cylinder is hooked on a reinforcing bar.

FIG. 7 is an enlarged view showing a procedure of constructing a cloth foundation by using an underfloor ventilation opening according to the first embodiment of the present invention, and showing an engagement state between a reinforcing bar and a hanging portion.

FIG. 8 is a longitudinal sectional view showing a procedure of constructing a fabric foundation by using the underfloor ventilation opening according to the first embodiment of the present invention, and showing a state where a formwork is arranged.

FIG. 9 is a vertical cross-sectional view showing a procedure of constructing a fabric foundation with the underfloor ventilation opening according to the first embodiment of the present invention, and showing a state in which ready-mixed concrete is solidified and completed.

FIG. 10 is a perspective view showing an underfloor ventilation port according to a second embodiment of the present invention and showing an external appearance of a ventilation cylinder.

FIG. 11 is a perspective view showing an underfloor ventilation port according to a third embodiment of the present invention and showing an external appearance of a ventilation cylinder. DESCRIPTION OF SYMBOLS 11 Cloth foundation 12 Horizontal part 13 Vertical part 18 Upper main bar 21 Ventilation cylinder 22 Ventilation lid 24 Underfloor ventilation port 30 Body part 31 Tapered part 34 Mesh 35 Hanging part 39 Contact ridge 50 Ground 54 Form 55 Form 59 Ventilation cylinder 60 Body 61 Taper 64 Mesh 65 Suspension 68 Spring piece 79 Ventilation cylinder 80 Body 81 Tapered 84 Mesh 85 Suspension 86 Suspension

Claims (7)

[Claims] 1. A body part which is embedded in a cloth foundation and has a hollow cylindrical shape, a mesh part provided at the other opening of the body part to allow air to flow, and hooks on a reinforcing bar of the cloth foundation. Characterized by a hanging part fixed to the periphery of the body part and a ventilation lid detachably fitted to one opening of the body part and permitting the flow of air. mouth. 2. A hollow cylindrical body portion embedded in a cloth foundation, and a continuous body provided at the other opening of the body portion, the outer shape of which is a truncated triangular pyramid, and the inside has a tapered hollow portion. And a mesh portion provided at the rear end of the tapered portion to allow air flow, a hanging portion fixed around the body portion to be hooked on the reinforcing bar of the fabric foundation, and detachably attached to the opening of the body portion. A cloth-floor underfloor vent, which is fitted with a ventilation lid that allows air to flow. 3. The fabric base according to claim 1, wherein the suspension portion fixed to the outer periphery of the body portion is fixed to be offset from the center of gravity of the body portion to the side where the suspension portion is opened. Underfloor ventilation. 4. A hanging part fixed to the outer periphery of the body part is slightly L-shaped, and has a contact projection protruding downward in the left-right length direction of the lower surface contacting the upper surface of the reinforcing bar. The underfloor ventilation opening of a cloth foundation according to claim 1, 2 or 3, wherein a ridge is provided. 5. The hanging portion fixed to the outer periphery of the body portion has a slightly L-shaped tip bent toward the body portion, and the tip portion approaches the outer periphery of the body portion by elastic force. The underfloor ventilation opening of a cloth foundation according to claim 1, 2 or 3. 6. A hanging portion fixed to an outer periphery of the body portion has a pair of slightly L-shaped shapes, and both are arranged so as to be parallel to each other at intervals on the outer periphery of the body portion. The underfloor ventilation opening of a cloth foundation according to claim 1, 2, or 3. 7. An underfloor ventilation opening having a hollow interior and a cylindrical shape, a ventilation cylinder having a hanging portion fixed to the outer periphery thereof,
It consists of a ventilation lid that can be removably fitted into the opening of this ventilation cylinder and allows air to flow, and the hanging part is hung on the horizontal part of a reinforcing bar standing upright on the ground to suspend the ventilation cylinder. With the ventilation cylinder suspended, place the formwork from both sides of the rebar, make each formwork adhere to the opening of the ventilation cylinder, pour ready-mixed concrete between both formwork, and mold after finishing A method for constructing an underfloor ventilation opening on a cloth foundation, comprising removing a frame and fitting a ventilation lid to an open ventilation cylinder.