JP5065751B2 - Ventilation structure behind the hut - Google Patents

Description

  The present invention relates to a ventilation structure in a cabin.

  Conventionally, in a building such as a house, ventilation is performed in the back of the shed so that hot air does not stay in the back of the shed due to direct sunlight or the like, or condensation does not occur in the back of the shed due to the temperature difference between the outside temperature and the temperature of the back of the hut. Has been done to ensure comfort and durability.

  Specifically, for example, a cap is provided at the upper part of the outer wall as a parapet part, and a ventilation passage is provided in the space between the cap and the outer wall and the space in the outer wall to communicate the back of the shed and the outside of the building. The technology to ventilate is known.

  Here, the height of both sides of the headboard is made long so that rainwater struck by strong winds does not enter the back of the shed from the ventilation path and the durability of the back of the shed does not deteriorate during a storm. There is a need. For this reason, when such a headboard is provided on the outer periphery of the building, there is a problem that the beauty of the building is impaired.

  Therefore, as a technique for solving the above-described problem, a technique of providing a flat water return that suppresses intrusion of rainwater in an air passage has been proposed (for example, see Patent Document 1).

According to this, rainwater to enter from the air passage hits the water and prevents infiltration in the depth direction of the air passage. For this reason, even if it does not form the height dimension of the both sides | surfaces of a headboard in elongate, invasion of rainwater can be suppressed and it is supposed that the said problem can be solved.
JP 7-279337 A

  However, in the above-described conventional technology, the flow passage area of the ventilation path is narrowed by returning water, and there is a possibility that the ventilation amount necessary for ventilating the entire cabin is not sufficiently obtained. Therefore, there is a concern that the ventilation performance of the performance that should originally be performed is lowered, and there is room for improvement.

  The present invention has been made in view of the above circumstances, and provides a ventilation structure of a shed that can cope with environmental changes such as preventing rainwater from entering the shed while maintaining ventilation performance. The main purpose.

  The present invention employs the following means in order to solve the above problems.

Means 1. A ventilation structure for ventilating the back of the hut by communicating the outdoor space and the back of the hut through a wall body whose front and back faces the outdoor space,
A cap member is provided at an upper end of the wall body, and a ventilation path is formed between the wall body and the cap member, and in the wall body, and communicates with an outdoor space and the back of the hut. Is provided with an opening / closing means for opening and closing the ventilation passage.

  According to the means 1, the opening / closing means is provided in the air passage formed between the wall body and the head member and in the wall body, and the air passage is opened / closed by the opening / closing means. Thus, for example, if the opening and closing means is to be opened and closed according to weather conditions such as rain and wind, when it is not during a storm, the ventilation of the hut is sufficiently ventilated by opening the ventilation passage, and during a storm In this case, it is possible to prevent the rainwater from entering the cabin by closing the air passage. As a result, it is possible to prevent rainwater from entering the back of the hut while maintaining ventilation performance.

  Also, in winter, excessive ventilation may reduce the temperature of the cabin and cause condensation in the cabin. In such a case, if the opening / closing means is opened / closed according to the temperature, excessive ventilation in the back of the hut can be suppressed by closing the air passage, and the occurrence of condensation can be suppressed. .

  Mean 2. The shed ventilation structure according to claim 1, wherein the opening / closing means is provided in a portion of the ventilation path formed between the wall body and the headboard member.

  According to the means 2, the opening / closing means is provided in a part formed between the wall body and the head member in the air passage. For this reason, for example, when the opening / closing means operates so as to prevent the intrusion of rainwater, the intrusion of rainwater is prevented in the ventilation path between the wall body and the head member. As a result, it becomes difficult or impossible for rainwater to enter even the air passages in the wall, so that it is possible to more reliably prevent the rainwater from entering the cabin.

Means 3. The opening / closing means includes an opening / closing body that can be switched between a closed position in which the air passage is closed and an open position in which the air passage is opened,
The opening / closing body is disposed at the closed position when a wind force flowing from the outdoor space into the ventilation path becomes a predetermined value or more, and a wind force flowing from the outdoor space to the ventilation path is not a predetermined value or more. The ventilation structure of the back of a hut as described in the means 1 or 2 which is arrange | positioned in the said open position in case.

  According to the means 3, when the force of the wind flowing from the outdoor space into the air passage becomes a predetermined value or more, the opening / closing body is arranged at the closed position, and when the wind force is not the predetermined value or more, the opening / closing body Is placed in the open position. Here, it is generally considered that rainwater is often blown by the wind and enters the air passage. Accordingly, in the present invention, the air passage is closed only in a weather situation where rainwater is likely to enter the air passage. Thereby, it becomes possible to show suitably the conflicting effects of maintaining ventilation performance and preventing rainwater from entering.

  In addition, since the air passage is automatically opened and closed by a wind force of a predetermined level or more, there is an advantage that an opening / closing operation by a human hand becomes unnecessary.

Means 4. The opening / closing body has a pressure receiving portion that receives wind force flowing from the outdoor space into the ventilation path,
When the wind force received by the pressure receiving part exceeds a predetermined value, it is placed in the closed position against the weight of the opening / closing body, and when the wind force is not more than the predetermined value, the opening weight returns to the open position. The ventilation structure of the attic as described in the means 3.

  According to the means 4, when the wind force received by the pressure receiving portion of the opening / closing body becomes equal to or greater than a predetermined value, the opening / closing body is disposed at the closed position, and the wind force received by the pressure receiving portion of the opening / closing body is not greater than the predetermined value. In this case, the opening / closing body is returned to the open position by its own weight. Thereby, opening and closing of the air passage can be realized by a simple configuration of an opening / closing body having a pressure receiving portion without using complicated opening / closing means.

  Means 5. 5. The roof ventilation structure according to claim 3 or 4, wherein the opening / closing means has a stopper for stopping the opening / closing body at the closed position.

  According to the means 5, the opening / closing body is stopped at the closed position by the stopper of the opening / closing means. Thereby, there exists an advantage which the setting of a closed position becomes easy. Moreover, since the opening / closing body itself does not have to have a function of stopping at a specific position, the structure can be further simplified.

  Means 6. The ventilation structure of the back of the hut according to means 5, wherein at least one of the opening and closing body and the stopper is provided with a buffer body that suppresses an impact when the opening and closing body and the stopper are brought into contact with each other.

  According to the means 6, the shock when the opening / closing body and the stopper are brought into contact with each other is suppressed by the buffer provided in at least one of the opening / closing body and the stopper. Thereby, since the breakage of the opening / closing body and the stopper is suppressed, the life of the opening / closing means can be extended. In addition, it is possible to suppress the impact sound generated when the opening / closing body and the stopper are brought into contact with each other.

  Mean 7 The hut ventilation structure according to any one of means 3 to 6, wherein the opening / closing means includes a support body that rotatably supports the opening / closing body with a base end portion thereof as a center.

  According to the means 7, the opening / closing body can be rotated around its base end portion by the support body of the opening / closing means. Thereby, it is possible to realize the position switching between the opening position and the closing position of the opening / closing body in the means 3, that is, the opening / closing of the air passage, by the rotation of the opening / closing body. In addition, when the opening / closing body is formed in a plate shape, the opening / closing body is opened / closed by switching between a state where the plate surface of the opening / closing body is along the air passage and a state where the air passage intersects or has a larger angle. In this case, it is preferable to configure the opening / closing body to rotate.

  Means 8. The roof structure ventilation structure according to any one of means 3 to 7, wherein the opening / closing means includes wind force adjusting means for adjusting a wind force for moving the opening / closing body to a closed position.

  According to the means 8, the wind force for moving the opening / closing body to the closed position is adjusted by the wind force adjusting means. That is, it is possible to adjust how much wind force the air passage is closed. As a result, it is possible to suitably prevent rainwater from entering the cabin.

Means 9. The opening / closing means includes
A weather sensor for detecting weather data for grasping the weather condition;
A control device that controls opening and closing of an opening and closing body that opens and closes the air passage, based on the weather data;
The ventilation structure of the back of a hut in any one of the means 1 thru | or 3 characterized by comprising.

  According to the means 9, the opening / closing means is provided with a weather sensor and a control device, and the control device controls the opening / closing body based on the weather data detected by the weather sensor, thereby opening and closing the air passage. The As a result, various effects can be expected, such as obtaining the effect of suppressing the intrusion of rainwater, and controlling the ventilation level of the cabin at a high level to suppress condensation that occurs in the cabin.

Means 10. The weather sensor includes a raindrop sensor that detects outdoor raindrops, and a wind speed sensor that detects a wind speed entering the ventilation path,
The roof ventilation structure according to claim 9, wherein the control device controls the opening / closing body to be in a closed position when raindrops are detected and a wind speed of a predetermined level or more is detected.

  According to the means 10, when the raindrop is detected by the raindrop sensor and the wind speed sensor and the wind speed of a predetermined level or more is detected, the opening / closing body is brought into the closed position by the control of the control device. As a result, it is possible to close the air passage only in a weather situation in which rainwater may enter the air passage. Thereby, maintenance of ventilation performance and prevention of intrusion of rainwater can be realized more reliably.

[First Embodiment]
The first embodiment will be described below with reference to the drawings. Fig.1 (a) is a longitudinal cross-sectional view which shows the ventilation structure of the hut back in 1st Embodiment, (b) is an enlarged vertical cross-sectional view of water return. 1st Embodiment is applied to the building of a land roof provided with the outer wall panel which has a parapet part in an upper end part. The building is constructed by, for example, a steel frame construction method.

  As shown in FIG. 1 (a), the building 11 includes a building body 20 formed by assembling a lightweight steel frame, and an outer wall panel 30 attached to the outer peripheral surface so as to protrude upward from the upper end of the building body 20. I have. A projecting portion of the outer wall panel 30 upward is a parapet portion 29.

  The building main body 20 is provided with a plurality of columns 21 extending in the vertical direction at a predetermined interval, and a plurality of beams 22 extending in the horizontal direction are connected to the columns 21 by bolts 60 so as to be bridged over the upper ends thereof. It is built by that.

  An ALC 23 is provided at the upper end of the beam 22 in order to enhance the sound insulation in the room. A hut back 25 is formed between the ALC 23 and a ceiling 24 provided below the ALC 23 so as to be spaced apart.

  A heat insulating material 26 is provided on the upper surface of the ALC 23 in order to ensure heat insulation of the building 11. Further, a waterproof sheet 27 for preventing rainwater from entering the building body 20 from the flat roof 28 is provided on the upper surface of the heat insulating material 26. Specifically, the waterproof sheet 27 extends to an intermediate position of the upper end surface of the outer wall panel 30 through a corner portion formed between the flat roof 28 and the parapet portion 29 of the outer wall panel 30. . This prevents rainwater from entering the building body 20 from the flat roof 28. In FIG. 1A, the waterproof sheet 27 is shown thicker than the actual thickness dimension for the convenience of illustration.

  The outer wall panel 30 includes an outer wall plate 31 and a support frame 32 that is attached to the back surface (indoor side) and supports the outer wall plate 31. The support frame 32 includes a pair of studs 33 that extend in the vertical direction at both ends in the width direction, an upper frame runner 34 that extends horizontally by connecting the upper ends of both studs 33, and a lower frame that extends horizontally by connecting the lower ends of both studs 33. And a runner (not shown). The pair of studs 33, the upper frame runner 34, and the lower frame runner are all made of channel steel. The pair of studs 33 are attached to the outer wall plate 31 so that the openings face each other. Similarly, the upper frame runner 34 and the lower frame runner are attached to the outer wall plate 31 so that the openings face each other.

  An aluminum headboard 40 is attached to the upper end of the outer wall panel 30 (parapet portion 29) so as to cover the upper end. The cap 40 is not limited to aluminum, but may be made of other metals or synthetic resins. The headboard 40 is formed by bending or drawing an aluminum plate. Specifically, the headboard 40 has an inclined plate portion 40a that is wider than the wall thickness of the outer wall panel 30 (parapet portion 29) and is inclined downward toward the indoor side, and a house extending downward from both side ends of the inclined plate portion 40a. It has the outer side extension board part 40b and the indoor side extension board part 40c. In this case, when it rains, rainwater is guided from the inclined plate portion 40a to the land roof 28 through the indoor extension plate portion 40c. The flat roof 28 is provided with a drainage facility for draining rainwater downward and draining it outdoors. Thereby, the amount of water from which rainwater dripping from the outdoor side extension board part 40b can be reduced. As a result, it is possible to prevent problems such as the outer wall plate 31 becoming dirty or a person near the outer periphery of the building 11 getting wet.

  The outdoor side extended plate portion 40b and the indoor side extended plate portion 40c have folded plate portions 40d and 40e formed by being folded inward from the respective lower ends. Accordingly, drainage is suitably performed in the folded plate portions 40d and 40e during rain, so that rainwater does not contact the outer wall panel 30 along the inner surface of the headboard 40.

  Waterproof rubber 41 is interposed between the upper end surface of the outer wall panel 30 (parapet portion 29) and the lower end surface of the inclined plate portion 40a of the headboard 40. Specifically, the waterproof rubber 41 is fixed on the waterproof sheet 27 reaching the upper end surface of the outer wall panel 30, and is pressed against the inclined plate portion 40 a of the headboard 40. As a result, rainwater entering from between the indoor side extension plate portion 40 c and the outer wall panel 30 is prevented from further entering the indoor side by the waterproof rubber 41.

  Next, the ventilation structure of the shed 25 will be described. The headboard 40 is provided on the outer wall panel 30 in a state where a gap is formed between the inner surface thereof and the outer peripheral surface of the outer wall panel 30 (parapet portion 29). . Thereby, the headboard ventilation path 45 which can ventilate external air is formed between the headboard 40 and the outer wall panel 30 (parapet part 29).

  A plurality of runner vent holes 34 a are formed in the web of the upper frame runner 34 of the outer wall panel 30 at predetermined intervals in the extending direction of the upper frame runner 34. The web of the beam 22 is formed with a plurality of beam vent holes 22a at a predetermined interval in the extending direction. As a result, in the outer wall panel 30 (more specifically, a space surrounded by the support frame 32), a wall internal air passage 35 that connects the headboard air passage 45 and the shed 25 is formed.

  With the structure of the ventilation structure of the cabin back 25 described above, the outdoor cabin and the cabin back 25 are communicated, and the cabin back 25 is ventilated. In other words, the outside air can flow from the headboard ventilation path 45 through the runner ventilation hole 34a to the wall ventilation path 35 and reach the cabin back 25 through the beam ventilation hole 22a. Therefore, the air staying in the shed 25 can reach the outside through the wall ventilation path 35 and the headboard ventilation path 45.

  Moreover, the outdoor side extension board part 40b is formed in the elongate direction longer than the indoor side extension board part 40c. Here, in general, rainwater often enters from the outdoor side of the headboard ventilation passage 45. Therefore, such intrusion of rainwater can be effectively suppressed.

  In the present embodiment, a water return mechanism 50 as an opening / closing means is provided between the outdoor side extension plate portion 40 b and the outer wall panel 30 in order to prevent rainwater from entering the cabin back 25. Therefore, hereinafter, the configuration of the water return mechanism 50 will be described in detail with reference to FIG.

  As shown in FIG. 1B, the water return mechanism 50 includes an attachment base 51 attached to the outer wall panel 30, a water return main body 52 as an opening / closing body attached to the attachment base 51, and the water return main body 52. And a stopper portion 53 that abuts.

  The attachment base 51 is formed by bending an aluminum plate. Specifically, the mounting base 51 includes a mounting plate portion 51a extending in the vertical direction, and an inclined plate portion 51b inclined downward from the upper end of the mounting plate portion 51a to the outdoor side. The attachment base portion 51 is attached to the outer wall plate 31 with the attachment plate portion 51a, and is attached with screws at the contact portion.

  Similarly, the water return body 52 is formed by bending an aluminum plate. Specifically, it has a long portion 52a as a pressure receiving portion and a short portion 52b extending perpendicularly from the tip of the long portion 52a, and has an L-shaped longitudinal section as a whole. The long portion 52a has a length dimension capable of closing between the outdoor side extension plate portion 40b and the outer wall panel 30 in a substantially horizontal state.

  The water return main body 52 is attached to the mounting base 51 with the short portion 52b facing downward and the base end of the long portion 52a in contact with the outer surface of the inclined plate portion 51b of the mounting base 51.

  Specifically, the water return main body 52 is attached so that a gap is formed between the water return main body 52 and the outdoor side extension plate portion 40b. In this state, the coping ventilation passage 45 is in an open state. Moreover, the water return main body 52 is attached to the attachment plate portion of the attachment base portion 51 from the outer surface on the proximal end side of the elongated portion 52a so as to rotate at a contact portion with the attachment base portion 51 when receiving a predetermined or higher wind force. A tape 54 as a support is attached and attached to the back surface of 51a.

  Here, when the water return main body 52 is attached with the tape 54, the area where the water return main body 52 receives the wind in the normal state by changing the relative position with respect to the attachment base 51 along the inclination direction of the inclined plate portion 51b. (In the state where the water return main body 52 is in contact with the inclined plate portion 51b, the area where the long portion 52a serving as the pressure receiving portion protrudes from the inclined plate portion 51b) can be changed. Thereby, the wind force which the water return main body 52 receives can be adjusted now.

  The stopper portion 53 has a flat plate shape, and is attached to the outdoor side extension plate portion 40b so as to protrude substantially horizontally from the outdoor side extension plate portion 40b of the headboard 40 to the indoor side. Moreover, the stopper part 53 is attached to the position where the front-end | tip part of the elongate part 52a and the stopper part 53 contact | abut, when the water return main body 52 receives wind force and rotates.

  With the configuration of the water return mechanism 50 described above, when the water return main body 52 receives a predetermined amount of wind power (wind power that can lift the water return main body 52 against its own weight), the water return main body 52 rotates. It moves and is brought into contact with the stopper portion 53 to maintain the closed state of the headboard ventilation passage 45. When the wind power exceeding the predetermined level is not received, the water return main body 52 returns to its original state by its own weight, that is, the state inclined downward, and the headboard ventilation passage 45 is opened.

  In addition, a buffer material 53 a as a buffer body is attached to the lower surface of the stopper portion 53 in order to suppress an impact when coming into contact with the water return main body 52. The buffer material 53a is made of rubber, for example, and has elasticity. Thereby, the malfunction which the stopper part 53 and the water return main body 52 are damaged is suppressed, and the lifetime of the water return mechanism 50 can be extended. Further, it is possible to suppress an impact sound generated when the stopper portion 53 and the water return main body 52 come into contact with each other.

  With the configuration and operation described above, the following advantageous effects can be obtained in the ventilation structure of the cabin 25 in the first embodiment.

  In the first embodiment, the hut back 25 is formed by the headboard ventilation passage 45 formed between the parapet portion 29 of the outer wall panel 30 and the headboard 40, and the wall ventilation passage 35 formed in the outer wall panel 30. The building 11 communicates with the outside. Further, a water return mechanism 50 that opens and closes the headboard air passage 45 is provided in the headboard air passage 45. As a result, when it is not during a storm, the sag vent 45 is opened and the hut 25 is sufficiently ventilated, and during a storm, the sag aer 45 is closed and rainwater enters the shack 25. Is blocked. As a result, it is possible to prevent rainwater from entering while maintaining the ventilation performance of the hut 25.

  Further, the water return main body 52 is provided on the outdoor side of the headboard ventilation passage 45. Here, generally, when the caps vent 45 is open to the outside, the wind can be easily taken in and the ventilation performance is high. On the other hand, rainwater blown by strong wind often intrudes from the caps vent 45 on the outdoor side. Conceivable. Such rainwater can be effectively prevented from entering on the outdoor side of the headboard ventilation passage 45. In addition, intrusion of rainwater into the wall ventilation path 35 is also prevented. As a result, it is possible to more reliably prevent rainwater from entering the cabin 25.

  Furthermore, since the headboard air passage 45 is automatically opened and closed by the water return mechanism 50, there is an advantage that an active opening and closing work by a resident is unnecessary.

  In the first embodiment, the headboard ventilation passage 45 is closed when the water return main body 52 receives wind power of a predetermined level or more. Here, it is generally considered that rainwater is often blown by the wind and infiltrates the headboard ventilation passage 45. Therefore, the headboard air passage 45 is closed only when the rainy weather is likely to enter the headboard air passage 45. Thereby, it becomes possible to show suitably the conflicting effects of maintaining ventilation performance and preventing rainwater from entering.

  In 1st Embodiment, the water return main body 52 can adjust the wind force which the water return main body 52 receives by changing the attachment position with the attachment base 51 along the inclination direction of the inclination board part 51b. It has become. As a result, for example, in the case of heavy rain, it is conceivable that the amount of water entering the hut 25 is relatively increased even with a light wind. In such a case, even if the wind force received by the water return main body 52 is weak, it is possible to adjust so that the headboard ventilation path 45 is closed. As a result, it is possible to suitably prevent rainwater from entering the cabin back 25.

  In the first embodiment, the outdoor side extension plate portion 40 b of the headboard 40 is provided with a stopper portion 53 that contacts the water return main body 52. Thereby, even if the storm continues for a long time, the intrusion of rainwater into the cabin back 25 can be suitably prevented.

[Second Embodiment]
Although 1st Embodiment demonstrated the example which provided the water return mechanism 50 which opens and closes the headboard ventilation path 45 by the effect | action of a wind force in the parapet part 29, it is not limited to this. For example, as in the second embodiment exemplified below, a control device is provided to control the water return opening / closing operation based on the detection values detected from various weather sensors, thereby opening and closing the headboard ventilation passage 45. May be.

  The configuration of the second embodiment will be described below with reference to FIG. Fig.2 (a) is a longitudinal cross-sectional view which shows the ventilation structure of the back of a hut in 2nd Embodiment, (b) is an expanded longitudinal cross-sectional view of water return. Note that the same components as those in the first embodiment are denoted by the same reference numerals and description thereof will be omitted, and different components will be newly denoted by symbols and will be described with a focus on differences from the first embodiment.

  As shown in FIG. 2A, a water return mechanism 70 is provided at the upper end of the outer wall panel 30 so as to be embedded in the outer wall plate 31. The water return mechanism 70 includes an electromagnetic solenoid 71 including a fixed iron core, a movable iron core, a coil spring, and the like, and a water return plate 72 as an opening / closing body connected to the movable iron core of the electromagnetic solenoid 71 (FIG. 2B). )reference). The water return plate 72 is in close contact with or in contact with the outdoor side extension plate portion 40b in conjunction with the advance and retreat of the movable iron core based on the on / off operation of the electromagnetic solenoid 71, and the open position separated from the outdoor side extension plate portion 40b. It can be switched to the position.

  The electromagnetic solenoid 71 of the water return mechanism 70 is electrically connected to the control device 80, and the electromagnetic solenoid 71 is controlled to be turned on / off by the control device 80. A wind speed sensor 90 is provided above the water return mechanism 70 so as to be embedded in the outer wall plate 31. The wind speed sensor 90 is configured to detect the speed of the wind flowing into the headboard ventilation path 45. A raindrop sensor 91 is provided on the flat roof 28. The raindrop sensor 91 is configured to detect the presence or absence of rain outside the building 11. Both the wind speed sensor 90 and the raindrop sensor 91 are electrically connected to the control device 80.

  The control device 80 includes a known microcomputer, and the detection signals of the wind speed sensor 90 and the raindrop sensor 91 are input to the control device 80. And the control apparatus 80 performs arithmetic processing based on each detection signal, and controls the on-off operation of the electromagnetic solenoid 71, that is, the opening / closing operation of the water return plate 72. Specifically, the control device 80 performs energization processing on the electromagnetic solenoid 71. That is, when the electromagnetic solenoid 71 is in an energized state (on state), the movable iron core moves to the outdoor side against the biasing force of the coil spring by the attractive force of the electromagnetic solenoid 71. Along with this, the water return plate 72 stored in the electromagnetic solenoid 71 moves substantially horizontally toward the outdoor side, and the outdoor side end portion approaches or contacts the outdoor side extending plate portion 40b. As a result, the headboard ventilation passage 45 is closed. When the electromagnetic solenoid 71 is not energized, the movable iron core is moved indoors by the biasing force of the coil spring. Along with this, the water return plate 72 moves indoors and is stored in the electromagnetic solenoid 71. As a result, the headboard ventilation passage 45 is opened.

  Next, arithmetic processing executed by the control device 80 will be described. FIG. 3 is a flowchart showing an outline of the calculation process.

  As shown in FIG. 3, in step S11, it is determined whether or not it is raining outdoors based on the detection signal of the raindrop sensor 91. In step S12, the headboard ventilation path is determined based on the detection signal of the wind speed sensor 90. At 45, it is determined whether or not a predetermined wind speed has been reached. Here, the predetermined wind speed is set to 15 m / s, for example. If a wind speed of 15 m / s or more is detected, YES is determined, and if it is less than 15 m / s, NO is determined.

  At this time, if both steps S11 and S12 are YES, the process proceeds to step S13, and the electromagnetic solenoid 71 is energized to close the headboard ventilation passage 45. Further, when the electromagnetic solenoid 71 is already energized, this state is maintained. This prevents rainwater from entering the headboard air passage 45 when there is rain and the wind speed of the headboard air passage 45 exceeds a certain level.

  If either of steps S11 and S12 is NO, the process proceeds to step S14. If the electromagnetic solenoid 71 has been energized so far, the energization is stopped, and the electromagnetic solenoid 71 has been energized so far. If not, keep it as it is. As a result, the roof 25 can be ventilated at all times in a state where rainwater does not enter the headboard ventilation passage 45. After this processing, the process returns to step S11 again to make the above determination.

  In step S15, which is subsequent to step S13, a timer built in the control device 80 is set to a predetermined time. Here, the predetermined time is set to 5 minutes, for example.

  Next, in step 16, it is determined whether or not 5 minutes have elapsed since the timer was set. When it is less than 5 minutes, it is judged as NO, and the closed state of the headboard ventilation passage 45 is maintained. If 5 minutes or more have elapsed, the determination is YES, and the process returns to step S11 to make the above determination. As a result, the capwood ventilation passage 45 is not opened unless at least 5 minutes have passed since it was determined that rainwater would enter through the capwood ventilation passage 45 in steps S11 and S12. Therefore, when the wind speed frequently changes in the vicinity of the predetermined wind speed (15 m / s), it is possible to avoid the disadvantage that the water return mechanism 70 repeats the opening / closing operation more than necessary.

  If the type is up in step S16, the timer is reset and then the process returns to step S11, and the above-described processing is repeated. And by such a series of processes, the opening / closing operation | movement of the water return mechanism 70 is controlled, and the headboard ventilation path 45 is opened / closed.

  With the configuration and operation described above, the ventilation structure of the cabin 25 in the second embodiment provides the following advantageous effects.

  In the second embodiment, as a means for opening and closing the headboard aeration path 45, the water return mechanism 70 provided in the headboard aeration path 45 and the water return mechanism 70 based on the detection values detected from the wind speed sensor 90 and the raindrop sensor 91. And a control device 80 for controlling the opening / closing operation. Thereby, the opening and closing of the headboard ventilation path 45 can be controlled based on the presence or absence of rain and a predetermined wind speed. That is, in the first embodiment, regardless of whether there is rainfall or not, when the water return main body 52 receives wind power of a predetermined level or more, the headboard ventilation passage 45 is closed, but in the second embodiment, it is avoided. Can do. As a result, it is possible to more reliably realize the ventilation performance of the hut 25 and prevent rainwater from entering.

[Other Embodiments]
The present invention is not limited to the first and second embodiments described above, and can be implemented, for example, in other forms shown as other examples below.

  -In 1st Embodiment, although the water return main body 52 was attached with the tape 54 with respect to the attachment base 51, you may attach using a hinge, for example. Moreover, although the headboard ventilation path 45 is opened and closed by rotating the water return main body 52, it may be opened and closed by movement other than rotation.

  -In 1st Embodiment, although the tape 54 which can change the attachment position with respect to the attachment base 51 of the water return main body 52 was illustrated as a wind power adjustment means, for example, the water return main body 52 is hinged with respect to the attachment base 51. It is good also as a wind force adjustment means with the structure which attaches so that rotation is possible and adjusts the fastening force of the hinge.

  -In 1st Embodiment, although the buffer material 53a was provided in the stopper part 53 as a buffer, it is not limited to this. For example, the stopper portion 53 may be made of rubber and the stopper portion 53 itself may be configured as a buffer.

  -In 1st Embodiment, although the headboard ventilation path 45 was ensured only in the outdoor side extension board part 40b side, you may provide the headboard channel | path part via the indoor side extension board part 40c side. In this case, the water return mechanism 50 may be provided also on the indoor side extension plate portion 40c side.

  -In 2nd Embodiment, although the wind speed sensor 90 and the raindrop sensor 91 were used as a weather sensor, it is not limited to a specific kind and number of weather sensors. For example, in addition to the wind speed sensor 90 and the raindrop sensor 91, temperature sensors are provided on the outdoor side and the hut back 25, respectively, and when the predetermined temperature difference occurs between the outdoor side and the hut back 25, the headboard ventilation passage 45 is opened and closed. You may control by the control apparatus 80 so that an abrupt temperature difference may not arise. According to this, the ventilation level of the cabin back 25 can be managed at a high level, and the occurrence of condensation in the cabin back 25 can be suitably prevented.

  Specifically, in the winter season, the hut 25 receives the heat of living generated indoors, and therefore the temperature is often higher than the outside air temperature. In order to prevent such a temperature difference, ventilation in the cabin 25 is promoted by opening the headboard ventilation passage 45. Thereby, the dew condensation of the hut back 25 can be prevented. Alternatively, the temperature of the cabin 25 may decrease due to excessive ventilation and condensation may occur in the cabin 25. In such a case, it is possible to suppress excessive ventilation of the cabin back 25 by closing the headboard ventilation passage 45 and to suppress the occurrence of condensation. Further, in the summer, structural members such as the beams 22 constituting the cabin back 25 are cold in the morning. Therefore, when the structural member is suddenly heated by the outside air temperature, dew condensation may occur around the structural member. In order to prevent such a sudden temperature difference from occurring, the temperature in the cabin back 25 is gradually increased by closing the headboard ventilation passage 45. Thereby, the dew condensation of the hut 25 can be suppressed.

  In the second embodiment, the water return plate 72 is driven to open and close using the electromagnetic solenoid 71, but other actuators such as a motor can also be used as the drive means for the water return plate 72.

  -In 2nd Embodiment, although the headboard ventilation path 45 was ensured only in the outdoor side extension board part 40b side, you may provide the headboard channel | path part via the indoor side extension board part 40c side. In this case, the water return mechanism 70 may be provided also on the indoor side extension plate portion 40c side.

  In both the above embodiments, the building 11 including the outer wall panel 30 having the parapet portion 29 has been described as an example. However, for example, the upper end of the outer wall of the balcony may be configured as a ventilation space.

  In both of the above embodiments, the building 11 constructed by the steel frame construction method has been described as an example, but the present invention can also be applied to the building 11 constructed by another construction method. For example, a wooden shaft construction method or a frame wall construction method may be used.

(A) is a longitudinal cross-sectional view which shows the ventilation structure of the hut back in 1st Embodiment, (b) is an expanded longitudinal cross-sectional view of water return. (A) The longitudinal cross-sectional view which shows the ventilation structure of the cabin back in 2nd Embodiment, (b) is an expanded longitudinal cross-sectional view of a water return. The flowchart which shows the outline | summary of the arithmetic processing performed with a control apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Building, 20 ... Building main body, 24 ... Back of hut, 29 ... Parapet part, 30 ... Outer wall panel as wall body, 35 ... In-wall ventilation path as ventilation path, 40 ... Kasagi, 45 ... Kasagi as ventilation path 50: Water return mechanism as opening / closing means, 52 ... Water return body as opening / closing body, 52a ... Long portion as pressure receiving portion, 52b ... Short portion, 53 ... Stopper portion as stopper, 53a ... Buffer body Buffer material as 54, Tape as support body, 70 ... Water return mechanism as opening / closing means, 71 ... Electromagnetic solenoid, 72 ... Water return plate as opening / closing body, 80 ... Control device, 90 ... Wind speed as weather sensor Sensor, 91 ... Raindrop sensor as a weather sensor.

Claims (8)

A ventilation structure for ventilating the back of the hut by communicating the outdoor space and the back of the hut through a wall body whose front and back faces the outdoor space,
A cap member is provided at an upper end of the wall body, and a ventilation path is formed between the wall body and the cap member, and in the wall body, and communicates with an outdoor space and the back of the hut. Is provided with opening and closing means for opening and closing the air passage ,
The open / close means includes an open / close body that can be switched between a closed position where the air passage is closed and an open position where the air passage is open, and a wind force adjusting means that adjusts a wind force that moves the open / close body to the closed position. And
The opening / closing body is disposed at the closed position when a wind force flowing from the outdoor space into the ventilation path becomes a predetermined value or more, and a wind force flowing from the outdoor space to the ventilation path is not a predetermined value or more. A ventilation structure in the shed, which is arranged in the open position in some cases .   The ventilation structure of the back of a hut according to claim 1, wherein the opening / closing means is provided in a portion of the ventilation path formed between the wall body and the headboard member. The opening / closing body has a pressure receiving portion that receives wind force flowing from the outdoor space into the ventilation path,
When the wind force received by the pressure receiving part exceeds a predetermined value, it is placed in the closed position against the weight of the opening / closing body, and when the wind force is not more than the predetermined value, the opening weight returns to the open position. The ventilation structure of a hut back according to claim 1 or 2 . The hut ventilation structure according to any one of claims 1 to 3 , wherein the opening / closing means includes a stopper for stopping the opening / closing body at the closed position. The ventilation structure of the back of a hut of Claim 4 provided with the buffer body which suppresses the impact when the said opening / closing body and a stopper contact | abut at least any one of the said opening / closing body and the said stopper. The ventilation structure of the back of a hut according to any one of claims 1 to 5 , wherein the opening / closing means includes a support body that supports the opening / closing body so as to be rotatable about a base end portion thereof. The wind force adjusting means supports the opening / closing body so as to be rotatable with respect to an attachment base attached to the wall body,
The mounting base includes a plate portion that partially overlaps the opening / closing body when the opening / closing body is in the open position;
The ventilation structure of the back of a hut in any one of Claim 1 thru | or 6 with which the relative position of the said opening / closing body with respect to the said board part can be changed with the said wind force adjustment means in order to change the area which the said opening / closing body receives a wind. . 2. The wind force adjusting means has a hinge that rotatably supports the opening / closing body with respect to an attachment base attached to the wall body, and the fastening force of the hinge can be adjusted. The ventilation structure of the hut back in any one of 6.

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