JPH09318114A - Construction of bend cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rainwater from flowing indoors through a bend cap and improve the water cut-off effect by a method wherein rainwater entering the inner space of a cap main body is caught by primary and secondary water catch structures and discharged outdoors through primary and secondary drain paths. SOLUTION: During strong wind accompanied by rain such as a storm, the wind flows into a primary flow path (a) in a front cover 4A from a front space S1 of a cap main body 2 and a primary drain path 25 provided on the circumferential face of a circumferential wall 4d of the front cover 4A through primary circumferential side openings 4c. By a bend cap A, rainwater flowing into the front space S1 of the cap main body 2 is discharged outdoors through a primary drain path 15, and rainwater flowing into a rear space S2 is discharged through a secondary drain path 20. Therefore, regardless of the intensity and direction of wind, rainwater is prevented from flowing into a room along with outside air through a front outside air intake 2a and flooding the room.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bend cap attached to an outer wall of a building to ventilate a room.

[0002]

2. Description of the Related Art Conventionally, as one means for improving ventilation, there is a bend cap as a ventilation device in which a round or square cover or hood is attached to a ventilation port formed in a wall.

In the bend cap, a cover and a hood are attached to the front outside airflow inlet on the outdoor side, and the horizontal blades extending in the left and right axial directions are set to the low position on the front end side located outdoors and to the indoor side. In the inclined state in which the rear end side is set to a high position, a plurality of pieces are laid horizontally at regular intervals in the vertical direction.

With this structure, after passing through the cover and the hood, the outside air is guided upward from below through the front outside airflow inlet formed between the horizontal blades adjacent to each other in the vertical direction, and taken in indoors. On the contrary, indoor air can be exhausted to the outside.

[0005]

However, the above-described bend cap has the following problems.

That is, although the outside air is taken in from the lower side to the upper side through the front outside airflow inlet, depending on the case of strong wind or the wind direction, rainwater along with the outside air may flow through the front outside airflow inlet to the inside. There was a problem of infiltrating the room and flooding the room.

In particular, when a bend cap is installed at a high position in a building higher than the ground, rain blows up from below along the outer wall of the building, and rainwater easily enters from the bend cap.

Further, the cover and the hood provided outdoors have a rainproof effect for preventing the entry of rainwater falling from the sky, but there is no rainproof effect for rainwater blown up from below, and moreover,
Since the cover and the hood are projected to the outside, there is a problem that they vibrate in the wind and generate a relatively loud wind noise.

[0009] Further, in the indoor piping of horizontal drawing, one end of which is connected to the bend cap and which is routed to a required indoor location, the indoor side is made higher than the connection location,
In a building with a low floor height, there was a problem that the slope of the piping could not be removed and horizontal slope was likely to occur, and rainwater could intrude from the joint.

[0010]

In view of the above, according to the present invention, there is provided a bend cap, which is attached to a ventilation port formed in a wall to allow ventilation, and has both ends opened so as to fit into the ventilation port. With a tubular cap body that can be attached in a state,
A space partition wall that has a central opening and divides the internal space of the cap body into an outdoor-side front space and an indoor-side rear space, a primary water-collecting flow channel structure provided in the front space, and a rear space. And a secondary water-collecting flow path structure, wherein the primary water-collecting flow path structure is formed on the front end surface parallel to the surface of the front outside airflow inlet of the cap body and the outer peripheral portion of the structure, It has a primary outer peripheral side opening that communicates between the primary internal flow path and the primary drainage channel, and also penetrates into the front side space between the inner peripheral surface of the cap body on the front side space side and the primary water catchment flow path structure. A primary drainage channel that allows the rainwater that has flown to the outside to flow outdoors is provided around it, and a secondary water catchment flow path structure is formed on the rear end face parallel to the rear outside airflow inlet surface of the cap body and on the outer periphery of the structure. The secondary outside that communicates between the secondary internal flow path and the secondary drainage path in the structure It has a side opening, and between the inner peripheral surfaces of the front and rear space sides of the cap body and the primary and secondary water-collecting flow path structures, rainwater that has infiltrated into the rear space, The present invention provides a bend cap structure characterized in that a secondary drainage channel is provided around the drainage hole formed in the lower part of the space partition wall to allow the secondary drainage channel to flow outdoors.

Further, according to the present invention, a pair of front and rear are installed as flow passage forming fins in the primary and secondary water collecting flow passage structures in a state where the space dividing wall is aligned with the axial direction of the cap body. Consisting of a flange of the side inner ring, the primary water collection flow path structure, in addition to the front inner ring, the front end face is arranged flush with the front outside air inlet,
Further, at a location facing the front inner ring of the peripheral wall, there is a saucer-shaped front cover in which a plurality of primary outer peripheral openings are formed. Another feature is that it has a saucer-shaped rear cover in which a plurality of secondary outer peripheral openings are formed at a location facing the rear inner ring of the peripheral wall.

Further, according to the present invention, the primary water-collecting flow channel structure has a saucer shape in which the front end face is flush with the front outside air inlet and a plurality of primary outer peripheral openings are formed on the peripheral wall at a predetermined angle. A second water catchment flow channel structure is disposed in the rear space of the cap body, and has a smaller opening area than the first upper and lower ventilation holes and the central opening of the space partition wall. A first rear side plate having a central air vent formed therein and a second rear plate having a larger opening area than the first upper and lower vents arranged rearward of the first rear side plate in the rear space.
A second flow path forming plate having upper and lower ventilation holes formed therein, and a pair of upper and lower first flow path forming fins is disposed on a rear side surface of the space partition wall near the central opening forming part. , A pair of upper and lower second flow passage forming fins are disposed on the front side surface of the first rear side plate and on the outer peripheral side of each of the first flow passage forming fins. A pair of upper and lower third flow path forming fins are arranged on the rear side surface near the mouth forming portion, and then a pair of upper and lower third flow path forming fins are provided on the front side surface of the second rear side plate on the outer peripheral side of each third flow path forming fin. No. 4 flow path forming fins are provided, and the tip portions of the first and second flow path forming fins, and the tip portions of the third and fourth flow path forming fins are respectively arranged on the respective virtual vertical transmission surfaces. It also has a feature that it overlaps above.

The present invention is also characterized in that a removable draining plate having a U-shaped cross section with an opening facing the outside is provided near the drainage port of the secondary drainage channel.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral A shown in FIG. 1 is a bend cap according to the present invention, and the bend cap A is attached to a ventilation port 1 formed in a wall portion W so that ventilation can be performed in a room.

As shown in FIGS. 1 and 2, the bend cap A has a cylindrical cap body 2 which is open at both ends and which can be fitted in the ventilation port 1 in a fitted state, and a central opening 3a. Having the inner space of the cap body 2 is a front side space on the outdoor side.
A space partition wall 3 that divides into S1 and a rear space S2 on the indoor side,
A primary water catching flow path structure 4 arranged in the front space S1 and a secondary water catching flow path structure 5 provided in the rear space S2 are provided, and the inner peripheral surface of the cap body 2 on the front space S1 side and the primary catching flow path structure 5 are provided. A primary drainage channel 15 is provided between the water flow path structures 4 to flow the rainwater that has entered the front space S1 to the outside, and the inner peripheral surfaces of the front and rear spaces S1 and S2 of the cap body 2 are provided. A secondary drainage channel 20 that allows rainwater that has entered the rear space S2 to flow between the primary and secondary water-collection flow channel structures 4 and 5 to the outside through a drainage hole 3b formed in the lower portion of the space partition wall 3. Have a structure in which they are circumferentially provided.

The cap body 2 is formed with a front outside air inlet 2a at the front end and a rear outside air inlet 2b at the rear end wall 2c. The rear end wall 2c is connected to the indoor pipe 13. The joint pipe 14 is screwed. In the lower part of the front and rear spaces S1 and S2 sandwiching the space partition wall 3 of the cap body 2, a drainage channel forming a front side portion of the secondary drainage channel 20 by bending a part of the peripheral wall downward. A downstream portion 20 'is formed. Further, a cutout portion 2e for accommodating a drainage passage partition plate 21, which will be described later, is formed in a lower portion of the flange 2d protruding from the front end of the cap body 2.

The space partition wall 3 is composed of mutually connected flanges 6a, 7a of front and rear inner rings 6, 7 which form a part of the primary and secondary water catching flow channel structures 4, 5, respectively. These front and rear inner rings 6, 7 are aligned with the axial direction of the cap body 2 in the axial direction.
It is incorporated as a fin for forming the primary and secondary internal flow paths a and b.

The front and rear inner rings 6, 7 are continuous pipes in which the axial lengths of the ring portions 6b, 7b are doubled by joining the flanges 6a, 7a with the insect net 12 interposed therebetween. Become a body. The flanges 6a and 7a have an outer diameter that is substantially the same as the inner diameter of the cap body 2.

The primary water catchment flow path structure 4 has a front cover 4A in the form of a saucer in addition to the front inner ring 6. The front cover 4A is arranged such that its front end face 4a is flush with the front outside airflow inlet 2a, and at the base of the peripheral wall 4b, a primary outer peripheral side opening 4c is provided at a position facing the ring portion 6b.
However, twelve are formed every 30 ° in the circumferential direction.

In addition to the rear inner ring 7, the secondary water collecting flow channel structure 5 has a rear cover having the same shape as the front cover 4A.
Has 5A. In the rear cover 5A, the front end surface 5a is arranged in parallel to the surface of the rear outside airflow inlet 2b, and the base portion of the peripheral wall 5b is connected to the secondary drainage channel 20 at a position facing the ring portion 7b. Twelve next outer peripheral side openings 5c are formed every 30 °. The front and rear covers 4A and 5A are provided with flanges 4d and 5d that are arranged to face each other.
It is superposed like a drum through 4d and 5d.

The front and rear covers 4A, 5A and the front and rear inner rings 6, 7 are attached to the cap body 2 by
Each of the four flanges 4d, 5d, 6a, and 7a to be polymerized is made into a long 3
This is performed by fastening the book to the rear end wall 2c via a fixing screw 18. Each fixing screw 18 has a front cover
A tightening pipe 17 having a length capable of holding the front end face 4a of 4A flush with the front outside airflow inlet 2a is inserted. In addition, at the bottom of each flange 4d, 5d, 6a, 7a, via a short screw 19,
The base of a drainage partition plate 21 that separates the primary and secondary drainage channels 15 and 20 is fastened. The front end of the drainage channel partition plate 21 is bent downward so that the drainage port 20a of the secondary drainage channel 20 faces downward. The lower end edge of the cap body 2 has a U-shaped cross section with the opening face facing outdoors, and the secondary drainage channel 20
A drainer plate 22 of rainwater that has flowed down from is detachably fastened with screws 23.

In FIG. 1, 14a is a vent of the joint pipe 14, 24 is a caulking material for closing the gap between the vent 1 of the wall W and the front outside air inlet 2a of the cap body 2, 25
Is a holding rubber and water blocking packing for fixing the insect screen 12 between the flanges 4d and 5d and the flanges 6a and 7a. FIG.
26 is a front cover 4A inside the cap body 2
Is a positioning portion for fixing the to a predetermined angular position in the circumferential direction. The positioning portion 26 is also provided on the rear cover 5A side.

In the bend cap A, when a strong wind accompanied by rain such as a typhoon, the wind blows from the primary drainage channel 25 provided between the front space S1 of the cap body 2 and the outer peripheral surface of the peripheral wall 4b of the front cover 4A to the peripheral wall 4d. Each outer peripheral side opening formed in
It flows into the primary internal flow path a in the front cover 4A through 4c. Most of the rainwater contained in the wind adheres to the inner peripheral surface on the front side of the cap body 2 and the outer peripheral surface of the peripheral wall 4b of the front cover 4A while passing through the primary drainage channel 15, and thereafter, these are collected. It falls by its own weight along the inner and outer peripheral surfaces, and flows down from the lower part of the primary drainage channel 15 to the outside through the drainage channel partition plate 211.

Next, the wind containing the remaining rainwater that has entered the primary internal flow path a is once moved along the ring portion 6b of the front inner ring 6 as shown by the arrow in FIG.
It flows into the front side of 4A, then flows into the inside of the front inner ring 6 and through the space dividing wall 3 into the inside of the rear inner ring 7. At this time, some rainwater adheres to the inner surface of each front cover 4A forming the primary internal flow path a and the outer peripheral surface of the ring portion 6b of the front inner ring 6, and the collected rainwater travels along each surface. It falls by its own weight and flows near the lower part of the front cover 4A to the lower part of the primary drainage channel 15 from the primary outer peripheral side opening 4c ', and similarly the drainage channel partition plate.
It passes through 21 and is flown outside.

On the other hand, the wind containing a little rainwater that has flowed into the rear inner ring 7 reaches the front side of the rear cover 5A of the secondary internal flow path b, and then the rear cover 5A as shown by the arrow in FIG. Around the secondary outer peripheral side opening 5c side of the peripheral wall 5b of the above, through the secondary drainage channel 20 into the joint pipe 14 from the rear outside air flow inlet 2b, and through the ventilation port 14a to the indoor piping 13
Flows into and can be taken into the interior of the building.

At this time, the inner surface of each rear cover 5A forming the secondary internal flow path b and the ring portion 7b of the rear inner ring 7 are formed.
Rainwater adhering to the outer peripheral surface of the rear side of the secondary outer peripheral side opening 5
It passes through c ′ to reach the lower part of the secondary drainage channel 20, and then through the drainage hole 3b formed in the lower part of the space partition wall 3 to fall from the drainage channel downstream side portion 20 ′ onto the drain plate 22, Drained outdoors.

Thus, the bend cap A of the embodiment is
Since the rainwater that has entered the front space S1 of the cap body 2 is discharged to the outside from the primary drainage channel 15, while the rainwater that has entered the rear space S2 is discharged through the secondary drainage channel 20,
Rainwater is prevented from entering the room through the front outside airflow inlet 2a together with the outside air even when there is a strong wind or wind direction, and the inside of the room is not flooded.

Further, since there is no cover or hood protruding outside, no wind noise is generated.

Further, as the primary water catching flow path structure 4, a front cover having a plurality of primary outer peripheral side openings 4c formed therein.
4A and a front inner ring 6 arranged in the primary internal flow path a are adopted, and the secondary water collection flow path structure 5
As a rear cover 5A with the same shape as the front cover 4A
And a rear inner ring 7 arranged in the secondary internal flow path b are adopted, so that wind flows into the primary internal flow path a from the primary outer peripheral side opening 4c formed in the front cover 4A. It is easy and the structure is simple, and the cost can be reduced.

Further, the front end surface 4a of the front cover 4A is
Since it is flush with the front outside airflow inlet 2a of the cap body 2,
The appearance of the outer wall of the building will be good, and even if strong wind blows from the vertical and horizontal directions, the wind will flow into the internal space of the cap body 2 only from the relatively narrow primary drainage channel 15 exposed to the outside. It is possible to prevent a weak wind noise from being generated due to a relatively large amount of being caught in the front space S1.

Furthermore, since a removable draining plate 22 having a U-shaped cross section with an opening facing the outside is provided near the drainage port 20a of the secondary drainage channel 20, from the drainage port 20a of the secondary drainage channel 20. Drained rainwater from the secondary water collection channel structure 5 can be drained well.

FIGS. 3 to 6 show a bend cap B of the second embodiment. As shown in FIG. 3, the bend cap B is a disc-shaped member having a horizontally long and large central opening 30a. And a pair of upper and lower first flow path forming fins 30b, 30 on the rear side near the central opening 30a forming part.
c is provided (see also FIG. 6).

In the primary water collecting channel structure, the front and rear inner rings 6 and 7 of the first embodiment are omitted, and the primary outer peripheral side opening 31b formed in the peripheral wall 31a is provided in the first embodiment. A front cover 31 larger than the primary outer peripheral side opening 4c is used.

Then, as the secondary water-collecting flow channel structure 29,
The one having a first rear plate 32 and a second rear plate 33 which are sequentially arranged at a predetermined interval in the rear space S2 behind the space partition wall 30 is adopted.

As shown in FIGS. 3 and 4, the first rear plate 32
Includes the first horizontally upper and lower ventilation openings 32a, 32b and the first horizontally elongated first opening having a smaller opening area than the central opening 30a of the space partition wall 30.
A central vent 32c is formed. First rear plate 32
On the outer side of the front side surface of each of the first flow path forming fins 30b and 30c, a pair of upper and lower second flow path forming fins 32d and 32e are provided.
And a pair of upper and lower third flow path forming fins 32f, 32g are arranged on the rear side surface of the first rear side plate 32 near the first central vent 32c forming portion. .

Further, as shown in FIGS. 3 and 5, the second rear side plate 33 has a horizontally elongated second upper and lower ventilation holes 33a, 33a having a larger opening area than the first upper and lower ventilation holes 32a, 32b. 33b is formed, and a pair of upper and lower fourth flow passage forming fins 33c, 33d are arranged on the front side surface of the second rear side plate 33 and on the outer peripheral side of the respective third flow passage forming fins 32f, 32g. ing.

Then, the front end portions of the pair of upper and lower first and second flow passage forming fins 30b-32d, 30c-32e, and the pair of upper and lower third and fourth flow passage forming fins 32f-33c, 32g. The tip parts of -33d overlap each other on the virtual vertical transmission surface. As a result, the bending of the flow path becomes large, and rainwater contained in the wind causes the rainwater contained in the wind to flow through the rear side plates 32, 33 and the flow path forming fins 30b, 30c, 32d, 32e, 32f, 32g, 33c, 33d. It becomes easier to adhere to the water and the water catching effect is improved. Generally, if the fins are overlapped with each other, the air flow becomes worse, but the degree can be reduced by making the fin spacing relatively large.

In FIG. 3, a'is a primary internal flow path, b '.
Is a secondary internal flow path, 30d is a drainage hole, 34 and 35 are secondary outer peripheral side openings, and in FIGS. 4 to 6, 30e, 32i and 33e are insertion holes of the tightening pipe 17, 30f is a screw hole, 30g, 32j and 33f are positioning recesses, and 32h is a protrusion.

In the bend cap B of the second embodiment, the wind accompanied by outdoor rainwater flows into the primary drainage channel 15 from the front outside airflow inlet 2a, and then the peripheral wall of the front cover 31.
Each primary outer peripheral side opening 31b of 31a flows into the primary internal flow path a ', and passes through the central opening 30a of the space partition wall 30 to the secondary internal flow path b'of the secondary water catchment flow path structure 29. enter. here,
The wind that has flowed into the secondary internal flow path b'goes straight as it is because the first central vent 32c formed in the first rear plate 32 in the traveling direction has a smaller opening area than the central opening 30a. It is divided into an air flow that flows and an air flow that splits into upper and lower sides.
The straight airflow abuts the central wall surface of the second rear plate 33 from the first central vent 32c, and then splits vertically and horizontally into upper third channel forming fins 32f and upper fourth. A gap with the flow path forming fin 33c or a lower third flow path forming fin
It passes through the gap between 32g and the lower fourth flow path forming fin 33d and flows into the rear side of the secondary drainage channel 20 from the secondary outer peripheral side opening 35, and then to the second upper vent 33a or the second lower part. After passing through the ventilation port 33b, the rear outside airflow inlet 2b and the ventilation port 14a, and flows into the indoor piping 13.

On the other hand, after flowing into the secondary internal flow path b ',
The airflow that comes into contact with the upper and lower wall surfaces of the first rear side plate 32 and branches in the vertical direction is the gap between the upper first flow path forming fins 30b and the upper second flow path forming fins 32d or the lower first flow path. It passes through the gap between the channel forming fins 30c and the lower second channel forming fins 32e and flows into the front side portion of the secondary drainage channel 20 from the secondary outer peripheral side opening portion 34, and then the first upper ventilation port 32a, first
Enter the rear side of the secondary drain 20 through the lower vent 32b of
Similarly, the second upper vent 33a or the second lower vent 33b
Through the rear outside airflow inlet 2b and the ventilation port 14a, and then flows into the indoor pipe 13.

In the front space S1, rainwater attached to each surface of the front cover 31 travels along the outer peripheral surface of the peripheral wall 31a or the inner peripheral surface of the peripheral wall 31a, and the primary outer peripheral opening of the lower portion.
It reaches the primary drainage channel 15 from 31b and is drained in the same manner as in the first embodiment.

In the rear side space S2, the rainwater captured by the surfaces between the space partition wall 30 and the first rear side plate 32 is finally the upper surface of the lower second flow path forming fin 32e. Rainwater that has fallen into the secondary drainage channel 20 through the secondary outer peripheral side opening portion 34 and has been caught by each surface between the first rear side plate 32 and the second rear side plate 33. From the upper surface of the lower fourth flow path forming fin 33d to the secondary drain opening through the secondary outer peripheral side opening 35.
It drops to 20, and is discharged to the outside through the drain hole 30d in the lower part of the space partition wall 30 as in the case of the first embodiment.

As described above, in the bend cap B of the second embodiment, the secondary water-collecting flow path structure 29 is arranged with the first rear side plate 32 and the first rear side plate 32 which are sequentially arranged at a predetermined interval from the space partition wall 30. Two
The rear side plate 33, and a predetermined number of each flow path forming fins 30b, 30c, 32d,
32e, 32f, 32g, 33c, 33d, the secondary internal flow path b'becomes a complicated labyrinth, and the secondary water collection flow path structure 5 of the bend cap A of the first embodiment captures. Water efficiency becomes good.

Then, as the primary water catchment flow path structure,
Since the one having the front cover 31 in which a plurality of primary outer peripheral side openings 31b are formed is adopted as 31a, the wind easily flows into the primary internal flow path a'through these primary outer peripheral side openings 31b, and the primary trapping is performed. The structure of the water flow path structure is simple and the cost can be reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and the present invention is included in the present invention even if there are design changes and the like without departing from the scope of the invention.

For example, the structures of the primary and secondary water-collecting flow channel structures are not limited to those of the first or second embodiment,
Rainwater collected in the primary or secondary internal flow channel partitioned by the space partition wall is sent to the primary or secondary drainage channel formed between the inner peripheral surface of the cap body and each water capture channel structure. Any structure may be used as long as it has a primary or secondary outer peripheral side opening capable of draining water.

Also, in the structure of the primary or secondary drainage channel, the rainwater captured in the front space partitioned by the space partition wall is drained to the outside as it is, and the rainwater captured in the rear space is spatially partitioned. Any other structure may be used as long as the structure is such that it is discharged to the outside through the front space through the drainage hole at the bottom of the wall.

Further, in the second embodiment, the first and second
Although the tip portions of the flow path forming fins and the tip portions of the third and fourth flow path forming fins are overlapped on each virtual vertical transmission surface, each flow is not limited to this. The tips of the channel forming fins may be aligned on the same plane, or may be shortened and separated from it.

In the embodiment, the draining plate is provided near the drainage port of the secondary drainage channel, but this is not always necessary.

[0051]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the structure can be mounted on the outer wall of various structures, and when indoor ventilation is performed, even if the wind blows up, down, left and right, ventilation is easily performed without introducing rainwater into the interior. Rainwater that has entered the internal space of the cap body is captured by the primary and secondary water catchment flow path structures that are arranged in the front and rear spaces of the space partition wall, and the inner peripheral surface of the cap body and the primary and secondary water catchment flow. Since it is designed to be discharged to the outside from the primary and secondary drainage channels formed between the road structure, it is possible to prevent indoor infiltration of rainwater from the bend cap and improve the water-stopping effect. Further, since there is no hood or cover protruding to the outside, it is possible to prevent the generation of wind noise, and maintenance is unnecessary.

According to the second aspect of the present invention, the first aspect is provided.
In addition to the effect of the above, as the primary water-collecting flow channel structure, a structure having a front cover having a plurality of primary outer peripheral side openings formed on the peripheral wall and a front inner ring arranged in the primary internal flow channel is adopted. Then, as a secondary water catchment flow path structure,
Since the one having a rear cover having the same shape as this primary water catching flow channel structure and a rear inner ring arranged in the secondary internal flow channel is adopted, the primary outer peripheral side opening formed with the wind on the front cover. It is easier to flow into the primary internal flow path, and the structure is simple, so that the cost can be reduced.

Further, since the front end surface of the front cover is flush with the front outside airflow inlet of the cap body, the appearance of the structure is good, and even if strong wind blows from the vertical and horizontal directions, the inside of the cap body Since the wind flows into the space only from the relatively narrow primary drainage channel exposed to the outside, it is possible to prevent a relatively large amount of the wind from being caught in the front space and generating a weak wind noise.

According to the present invention of claim 3,
In addition to the effect of, the primary water catchment flow path structure has a front cover with a plurality of primary outer peripheral side openings formed on the peripheral wall. It is easy to flow into the primary internal flow channel from the portion, and the structure of the primary water collection flow channel structure is simple, and the cost can be reduced.

Further, since the secondary water-collecting flow channel structure having the first rear plate and the second rear plate on which various flow channel forming fins are projected is adopted, the secondary internal flow channel is It becomes complicated and the water catching property is improved.

Since the tips of the adjacent flow path forming fins are overlapped with each other on each virtual vertical transmission surface, the bending of the flow path becomes large and rainwater contained in the wind forms each flow path. The fins are easily attached to the surface on the flow path side, and the water catching effect can be improved.

According to the fourth aspect of the present invention, the drainage plate of the secondary drainage channel is provided in the vicinity of the drainage port of the secondary drainage channel. Good drainage of rainwater captured by the secondary water collection flow channel structure drained from the mouth can be performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a bend cap in use according to a first embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view of a bend cap in use according to a second embodiment of the present invention.

FIG. 4 is a rear view of the space division wall.

FIG. 5 is a rear view of the first rear plate.

FIG. 6 is a front view of a second rear plate.

[Description of sign]

 A Bend cap W Wall S1 Front space S2 Rear space a Primary internal flow path b Secondary internal flow path 1 Ventilation port 2 Cap body 2a Front outside air inlet 2b Rear outside air inlet 3 Space partition wall 3a Central opening 3d Drainage hole 4 Primary water catching flow path structure 4a Front end face 5 Secondary water catching flow path structure 5a Rear end face 15 Primary drainage channel 20 Secondary drainage channel

Claims (4)

[Claims] 1. A bend cap attached to a ventilation opening formed in a wall for ventilation, the tubular cap body having both ends opened so that it can be fitted in the ventilation opening in a fitted state. A space partition wall that has a central opening and divides the inner space of the cap body into a front space on the outdoor side and a rear space on the indoor side; and a primary water-collecting flow channel structure provided in the front space. A secondary water catching flow channel structure provided in the rear space, wherein the primary water catching flow channel structure is a front end face parallel to a face of the front outside airflow inlet of the cap body, and a structure outer peripheral portion. And a primary outer peripheral side opening that communicates between the primary internal flow channel in the structure and the primary drainage channel, and the inner peripheral surface on the front space side of the cap body and the primary water trapping channel. Rain between the structures penetrates the front space. A primary drainage channel is provided around the rear end surface parallel to the rear outer airflow inlet surface of the cap body and the outer peripheral portion of the structure. It has a secondary internal flow path in the structure and a secondary outer peripheral side opening that communicates between the secondary drainage channels,
In addition, between the inner peripheral surfaces of the front and rear space sides of the cap body and the primary and secondary water-collecting flow channel structures, rainwater that has infiltrated into the rear space is provided below the space partition wall. A bend cap structure characterized in that a secondary drainage channel is provided around the drainage hole so that the secondary drainage channel flows down to the outside. 2. A pair of front and rear inners which are incorporated as flow passage forming fins in the primary and secondary water collecting flow passage structures in a state where the space partition walls are aligned with the axial direction in the axial direction of the cap body. A ring flange, and the primary water-collecting flow path structure has, in addition to the front inner ring, the front end face arranged flush with the front outer airflow inlet and facing the front inner ring of the peripheral wall. Has a saucer-shaped front cover in which a plurality of the primary outer peripheral side openings are formed, and the secondary water catchment flow channel structure further includes a peripheral wall in addition to the rear inner ring. The bend cap according to claim 1, further comprising a saucer-shaped rear cover having a plurality of the secondary outer peripheral side openings formed at a position facing the rear inner ring. Elephants. 3. A saucer shape in which the primary water catchment flow channel structure has the front end surface flush with the front outside airflow inlet, and a plurality of primary outer peripheral side openings are formed on a peripheral wall at a predetermined angle. Further, the secondary water-collecting flow channel structure is arranged in the rear space of the cap body, and is opened from the first upper and lower ventilation holes and the central opening of the space partition wall. A first rear plate having a first central vent having a small area; and a rear space of the rear space that is located rearward of the first rear plate and is open from the first upper and lower vents. A second flow path forming plate having second upper and lower ventilation holes having a large area, and a pair of upper and lower first flow paths on the rear side surface near the central opening forming part of the space partition wall. Channel forming fins are provided, and each of the first channel forming portions is formed on the front side surface of the first rear plate. A pair of upper and lower second flow path forming fins is disposed on the outer peripheral side of the fins, and a pair of upper and lower third flow path forming fins is provided on the rear surface near the central vent hole forming portion of the first rear plate. And a pair of upper and lower fourth flow channel forming fins are disposed on the front side surface of the second rear plate on the outer peripheral side of the third flow channel forming fins. The tip portions of the first and second flow path forming fins, and the tip portions of the third and fourth flow path forming fins are
The bend cap structure according to claim 1, wherein the bend cap structures are overlapped on each virtual vertical transmission surface. 4. A removable drainer plate having a U-shaped cross section with an opening facing outdoors is provided in the vicinity of a drainage port of the secondary drainage channel. The bend cap structure according to item 1.