JP2010174502A - Differential pressure regulating mechanism for door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a differential pressure regulating mechanism for a door capable of regulating a differential pressure by a small force without being affected by the magnitude of the differential pressure on the inside and the outside of the door. <P>SOLUTION: This differential pressure regulating mechanism 1 for a door for regulating the differential pressure occurring on the inside and the outside of the door includes an opening 10 formed in a part of a door body 3, a recessed part 20 formed in the door body 3 adjacently to the opening 10, and a slide plate 30 which closes the opening 10 and is slidable to the recessed part 20. A lock mechanism for locking the slide plate 30 to the position of the opening 10 is provided to the slide plate 30 or the door body 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a door differential pressure adjusting mechanism for adjusting a differential pressure generated inside and outside a door.

  In recent years, due to high airtightness in condominiums and houses, when a ventilating fan or the like is used indoors, differential pressure is often generated indoors and outdoors. When differential pressure is generated inside and outside the door in this way, the door that opens or closes in the direction in which the wind pressure is acting on the outside door or inside door, which may cause problems such as difficulty in opening the door. There are things to do. In such a case, if it is a sliding door (sliding door), the possibility of occurrence of an open / close failure is low. However, since the sliding door has to be provided with a drawing space, there are many cases where it cannot be installed because of the installation space.

  Therefore, in the opening door of the outer opening door or the inner opening door, an opening is provided in the door main body, and a window main body for opening and closing the opening is attached by pivotally supporting the upper portion thereof. There has been a configuration in which the opening is opened to release pressure by rotating the main body upward (see, for example, Patent Document 1).

JP-A-10-131642

  However, in the conventional configuration described above, the window main body must be rotated against the wind pressure applied to the window main body. Therefore, when the differential pressure is large and the wind pressure applied to the door is large, the window main body is rotated. There was a problem of requiring a large force to move.

  Accordingly, the present invention has been devised to solve the above-described problem, and is capable of adjusting the differential pressure with a small force without being affected by the magnitude of the differential pressure inside and outside the door. It is an object to provide an adjustment mechanism.

  In order to solve the above problems, the present invention provides a door differential pressure adjusting mechanism for adjusting a differential pressure generated inside and outside a door, the opening formed in a part of the door body, and the opening And a sliding plate that closes the opening and is slidable on the retracting portion. The door differential pressure adjusting mechanism.

  According to the door differential pressure adjusting mechanism having such a configuration, the opening is opened by sliding the slide plate to the retracting portion, so that even if the pressure difference inside and outside the door is large, it is not affected by the wind pressure. Therefore, the opening can be opened with a small force, and the differential pressure can be easily adjusted.

  Further, the present invention is characterized in that a lock mechanism for locking the slide plate at the position of the opening is provided on the slide plate or the door body.

  According to the differential pressure adjusting mechanism for a door having such a configuration, the slide plate can be securely fixed, the opening can be prevented from being opened without permission, and functions as a door such as crime prevention can be ensured.

  Further, according to the present invention, the lock mechanism includes a lock pin provided on the door body so as to be able to protrude and retract along a direction intersecting the sliding direction of the slide plate, and the lock pin formed on the door body is inserted. And a locking hole.

  According to the door differential pressure adjusting mechanism having such a configuration, the slide plate can be reliably fixed with a simple structure and operation in which the lock pin is projected and retracted in the locking hole.

  Further, in the present invention, the locking hole is formed to penetrate from the opening side surface of the door main body to the outer peripheral side surface, and the lock pin penetrates the locking hole of the door main body, It is configured to be inserted into a frame locking hole formed in a frame around the door body.

  According to the door differential pressure adjusting mechanism having such a configuration, the lock plate can not only lock the slide plate to the door body but also the door body to the frame.

  Further, in the present invention, the slide plate is configured to be slidable from the hand side of the door body toward the suspension base side, and the retracting portion is inclined so that the suspension base side of the door body is raised. It is characterized by being formed.

  According to the differential pressure adjusting mechanism for a door having such a configuration, after the slide plate is slid to the drawing portion, when the hand is released, the slide plate automatically returns to the opening position, so that the trouble of returning the slide plate to the original position is reduced. It is possible to save and prevent the opening from being left open.

  According to the present invention, an excellent effect is exhibited that the differential pressure can be adjusted with a small force without being affected by the magnitude of the differential pressure inside and outside the door.

It is the perspective view which showed the differential pressure | voltage adjustment mechanism for doors which concerns on 1st embodiment. It is the perspective view which showed the state which the opening part of the differential pressure | voltage adjustment mechanism for doors which concerns on 1st embodiment opened. It is the disassembled perspective view which showed the differential pressure | voltage adjustment mechanism for doors which concerns on 1st embodiment. It is the perspective view which showed the differential pressure | voltage adjustment mechanism for doors which concerns on 2nd embodiment. It is the perspective view which showed the state which the opening part of the differential pressure | voltage adjustment mechanism for doors which concerns on 2nd embodiment opened. It is a principal part enlarged front view which showed the differential pressure adjusting mechanism for doors concerning 3rd embodiment. It is the principal part enlarged front view which showed the state which the opening part of the differential pressure adjusting mechanism for doors concerning 3rd embodiment opened. It is a principal part expansion perspective view which showed the differential pressure | voltage adjustment mechanism for doors which concerns on 4th embodiment. It is a principal part expansion perspective view which showed the state which the opening part of the differential pressure adjusting mechanism for doors concerning 4th embodiment opened.

(First embodiment)
A first embodiment for carrying out a door differential pressure adjusting mechanism according to the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the door differential pressure adjusting mechanism 1 is for adjusting a differential pressure generated inside and outside the door, and is formed on, for example, an opening door 2. The opening door 2 includes a door body 3, a frame body 4 that surrounds the door body 3, and a hinge 5 that rotatably attaches the door body 3 to the frame body 4. The frame body 4 includes a three-sided frame 4 a that surrounds the side surface and the upper surface of the door body 3, and a lower frame 4 b that surrounds the lower surface of the door body 3.

  As shown in FIGS. 1 to 3, the door differential pressure adjusting mechanism 1 includes an opening 10 formed in a part of the door body 3 and a pull-in formed in the door body 3 adjacent to the opening 10. And a sliding plate 30 that closes the opening 10 and is slidable on the retracting portion 20.

  The opening 10 is formed by cutting away from the hand side end of the door body 3 toward the suspension base, and in particular, as shown by a diagonal line in FIG. . The opening 10 is formed at a predetermined distance from the upper end and the lower end of the door main body 3, and the suspension base side, the upper side, and the lower side are surrounded by the door main body 3.

  The retracting portion 20 is formed in a door pocket shape on the inner side in the thickness direction of the door body 3 adjacent to the suspension base side of the opening 10. The lead-in part 20 extends to the upper side and the lower side of the opening 10 and has a U-shape when viewed from the front. The lead-in part 20 accommodates the suspension side, the upper side, and the lower side of the peripheral edge part 31 of the slide plate 30. When the slide plate 30 is in a position where the entire opening 10 is closed, the retracting portion 20 is formed with a space closer to the suspension side than the slide plate 30, and the slide plate is placed in this space (this is the retracting space). 30 slides. The retracting depth of the retracting portion 20 is appropriately set according to the differential pressure generated inside and outside the door and the area of the slide plate 30. When the differential pressure is large or the area of the slide plate 30 is small, the pull-in amount is large, and when the differential pressure is small or the area of the slide plate 30 is large, the pull-in amount is small. Rails (not shown) for guiding the slide plate 30 are provided on the upper side and the lower side of the lead-in part 20, respectively. The lead-in portion 20 is formed so that the upper side and the lower side are inclined so that the suspending side is higher, and the rail is similarly inclined. The inclination of the drawing-in part 20 is an angle at which the slide plate 30 in a free state when released can be automatically moved to a position (closed position) where the entire opening part 10 is closed.

  The slide plate 30 is formed thinner than the door body 3, and the suspending side, the upper side, and the lower side of the peripheral edge portion 31 are accommodated in the retracting portion 20. A rod-shaped sealing material (not shown) is provided on the surface of the peripheral edge portion 31 of the slide plate 30. The front end portion of the sealing material is in contact with the inner surface of the drawing-in portion 20 to ensure the airtightness between the inner side and the outer side of the door body 3. The slide plate 30 is made of the same material and color as the door body 3. The slide plate 30 may be designed as an accent instead of the color or material of the door body 3. The slide plate 30 is provided with a door knob 32 and a handle 33. The handle 33 is gripped when the slide plate 30 is slid. A door wheel 34 is rotatably provided on the lower end surface and the upper end surface of the slide plate 30 so that the slide plate 30 can smoothly slide in the retracting portion 20. Reinforcing ribs (not shown) are formed in the slide plate 30 and the door main body 3 to prevent the slide plate 30 and the door main body 3 that are long in the vertical direction from being bent.

  The slide plate 30 is provided with a lock mechanism 40 that locks the slide plate 30 at the position of the opening 10. The lock mechanism 40 maintains a state in which the slide plate 30 completely covers the entire opening 10. Specifically, the lock mechanism 40 is provided with a lock pin 41 provided on the slide plate 30 and retractable on the door body 3 side. And a locking hole 46 that is formed in the door body 3 and into which the lock pin 41 is inserted.

  The lock pin 41 is provided so as to extend along the direction intersecting the slide direction inside the slide plate 30. Here, the sliding direction is a direction extending substantially horizontally (inclined by the inclination angle of the retracting portion 20) from the hand side of the door body 3 to the hanging base side, and is a direction intersecting the sliding direction. It is a direction extending up and down along the surface of the door body 3. That is, the lock pins 41 extend in the vertical direction and are provided above and below the thumbturn 43, respectively. The upper lock pin 41 is formed such that its distal end protrudes beyond the upper door body 3 of the slide plate 30 to the inside of the upper side of the three-way frame 4a. The lower lock pin 41 is formed to have a length that protrudes beyond the lower door body 3 of the slide plate 30 to the inside of the lower frame 4b. Each lock pin 41 is connected to the thumb turn 43 via a link mechanism 44. The link mechanism 44 includes a first link member 44 a connected to the thumb turn 43, and a second link member 44 b spanned between the tip of the first link member 44 a and the inner end of the lock pin 41. Has been.

  The center portion of the first link member 44 a is directly connected to the rotation shaft of the thumb turn 43, and rotates in conjunction with the rotation of the thumb turn 43. The second link members 44b are provided above and below the thumb turn 43, respectively. One end of each second link member 44b, 44b (the end on the thumbturn 43 side) is pin-coupled to both ends of the first link member 44a via first pins 45a, 45a, respectively. The other ends (lock pin 41 side ends) of the second link members 44b and 44b are respectively pin-coupled to one ends (inner ends) of the upper and lower lock pins 41 and 41 via the second pins 45b and 45b. The second pins 45b and 45b are guided so as to move along the vertical direction.

  According to such a configuration, when the thumb turn 43 is rotated from the state in which the slide plate 30 is locked (see FIG. 1), as shown in FIG. 2, the first link member 44a rotates and the second link member 44b The thumb turn 43 side end is pulled by the first pin 45a, and rotates on the outer peripheral track of the first link member 44a. At this time, the lock pin 41 side end of the second link member 44b is guided so as to move in the up-down direction, and therefore is drawn linearly toward the thumb turn 43 side. As a result, the lock pin 41 is pulled into the slide plate 30.

  The locking hole 46 is formed so as to open on the side surface of the door body 3 on the opening 10 side and to face the end surface of the slide plate 30. Here, the side surface on the opening 10 side is a surface that is orthogonal to the surface of the door body 3 and extends in the thickness direction of the door body 3 and surrounds the periphery of the opening 10. The locking hole 46 is formed at a position where the lock pin 41 appears and disappears when the slide plate 30 is located at a place where the entire opening 10 is blocked. In the present embodiment, the locking hole 46 is formed so as to penetrate from the opening 10 side surface of the door body 3 to the outer peripheral side surface.

  A frame locking hole 47 is formed in the upper side portion of the three-way frame 4a located on the door body 3. A frame locking hole 47 is also formed in the lower frame 4b located under the door body 3. These frame body locking holes 47 are formed on an extension line of the locking hole 46 in a state in which the door body 3 is closed.

  The rotation stop position of the thumb turn 43 is set in the following three stages. (1) As shown in FIG. 1, the distal end portion of the lock pin 41 is inserted into the frame body locking hole 47 so that the slide plate 30 is locked to the door body 3 and the door body 3 is attached to the frame body 4. The door is locked. (2) As shown in FIG. 2, the unlocked state in which the tip of the lock pin 41 is immersed in the slide plate 30 so that the slide plate 30 can slide into the retracting portion 20. (3) Although not shown, the front end of the lock pin 41 is inserted into the locking hole 46 of the door body 3 and inserted into the frame locking hole 47 between the door locked state and the unlocked state. The slide plate is locked only by the slide plate 30 being locked to the door body 3. Normally, the door body 3 can be an open door 2 that can be freely opened and closed by keeping the slide plate locked.

  Next, the operation of the present invention will be described while explaining the operation method of the door differential pressure adjusting mechanism 1 configured as described above.

  The opening door 2 provided with the door differential pressure adjusting mechanism 1 is closed in the state shown in FIG. In this state, the opening 10 is closed by the slide plate 30, and the gap between the slide plate 30 and the retracting portion 20 is sealed by the sealing material provided on the peripheral edge portion 31 of the slide plate 30. Therefore, the airtightness inside and outside the hinged door 2 is ensured.

  When a differential pressure is generated inside and outside the opening door 2 and the door body 3 is opened and closed heavy, the thumb turn 43 is rotated to the state shown in FIG. As a result, the lock pin 41 is pulled through the link mechanism 44 and sunk in the slide plate 30. Then, the thumb turn 43 or the handle 33 is pushed to slide the slide plate 30 into the retracting portion 20. As a result, a communication opening 11 is formed in the portion where the slide plate 30 slides and moves on the hand side in the opening 10 so as to communicate the inside and outside of the door, and the differential pressure is adjusted. At this time, since the slide plate 30 moves along the surface of the door body 3, the indoor volume does not change. Further, the slide plate 30 does not move in the direction in which the wind pressure is acting. Therefore, the slide plate 30 can be easily slid without being affected even if there is a pressure difference between the inside and outside of the opening door 2, and the inside and outside pressure difference of the opening door 2 is adjusted. The door 2 can be opened. Here, since both the opening 10 and the slide plate 30 are long in the direction (vertical direction) intersecting the slide direction, the open area of the communication opening 11 (the state in which the slide plate 30 has been slid to the suspension side) with a small amount of slide. Door opening area) can be obtained and the pressure difference between the inside and outside of the door can be adjusted smoothly. Further, since the reinforcing plate prevents the slide plate 30 and the door body 3 that are long in the vertical direction from bending, the inner surface of the retracting portion 20 and the slide plate 30 can be prevented from competing, and the slide plate 30 slides. It won't be difficult.

  Moreover, in this embodiment, since the lock mechanism 40 is provided in the slide plate 30, the slide plate 30 can be fixed to the door main body 3, and the opening part 10 can be prevented from opening arbitrarily. Therefore, functions as the opening door 2 such as crime prevention and airtightness can be secured.

  Furthermore, the lock mechanism 40 is configured to include a lock pin 41 that protrudes and protrudes toward the door main body 3 side, and a locking hole 46 formed in the door main body 3, so that the lock pin 41 is used as the locking hole 46. The slide plate 30 can be securely fixed with a simple structure and operation such as making it appear and disappear. Further, the lock pin 41 can be used even during a power failure without using electric power because the thumb turn 43 is manually rotated so that the lock pin 41 is moved in and out via the link mechanism 44.

  Furthermore, since the slide plate 30 can be locked to the door body 3 by the appearance of the lock pin 41, the door body 3 can be locked to the frame body 4, so that the key of the opening door 2 can be omitted.

  Moreover, since the drawing-in part 20 is formed so as to be inclined so that the suspending side of the door body 3 becomes higher, when the hand is released after the door body 3 is opened, the slide plate 30 automatically opens the opening 10. Return to the position to block. Therefore, it is possible to save the trouble of returning the slide plate 30 to the original position and to prevent the opening 10 from being left open.

  In the present embodiment, the lock pins 41 are provided on both the upper and lower sides of the thumb turn 43, but only one of them may be provided.

(Second embodiment)
A second embodiment for carrying out the door differential pressure adjusting mechanism according to the present invention will be described in detail with reference to FIGS. 4 and 5.

  As shown in FIGS. 4 and 5, the door differential pressure adjusting mechanism 101 has an opening 110 cut out from the hand side of the door body 103 and formed below the door knob 32. Also in this embodiment, the lead-in part 120 is formed in a door pocket shape adjacent to the suspension side of the opening part 110. The lead-in part 120 is formed so as to be inclined so that the suspension base side becomes higher.

  The slide plate 130 is thin on the suspending side and is slidable in the retracting portion 120. Further, the hand side of the slide plate 130 has the same thickness as the door main body 103 and is configured such that the surfaces are flush with each other, and the design is changed from that of the first embodiment. Since the slide plate 130 has a shorter length in the direction intersecting the slide direction than the first embodiment, the slide plate 130 has a larger slide amount (retraction depth of the pull-in portion 20) than the first embodiment, and communicates. The area of the opening 111 (see FIG. 5) is secured.

  In this embodiment, a lock mechanism 140 that locks the slide plate 130 at the position of the opening 110 is provided in a key 141 having a general structure provided in the door main body 103 and a locking hole 146 formed in the slide plate 130. Configured. The normal key 143 is provided so that the dead bolt 143a protrudes and protrudes toward the side surface of the three-way frame 4a as provided above the door knob 32. On the other hand, the key 141 constituting the lock mechanism 140 is arranged such that the dead bolt 141a appears and disappears in the vertical direction. The dead bolt 141a protrudes downward from the upper end edge of the opening 110. The locking hole 146 is formed in the upper end surface of the slide plate 130 so as to open upward. The locking hole 146 is formed at a position where the dead bolt 141a appears and disappears when the slide plate 130 is positioned where the opening 110 is blocked.

  Since other configurations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

  Next, the operation of the present invention will be described while explaining a method of operating the door differential pressure adjusting mechanism 101 having the above-described configuration.

  As shown in FIG. 4, the open door 102 provided with the door differential pressure adjusting mechanism 101 is closed in a state where the dead bolt 141 a of the key 141 is inserted into the locking hole 146 on the upper end surface of the slide plate 130. ing.

  When a differential pressure is generated inside and outside the opening door 102 and the door body 103 is opened and closed heavy, the key 141 is rotated to the state shown in FIG. As a result, the dead bolt 141 a is immersed in the door body 3 and pulled out from the locking hole 146. Then, the handle 33 is pushed to slide the slide plate 130 into the retracting portion 120. At this time, since the slide plate 130 moves along the surface of the door main body 103 as in the first embodiment, the slide plate 130 can be easily slid without being affected by the differential pressure. The differential pressure is adjusted. Thereafter, the opening door 102 can be easily opened.

  Moreover, in this embodiment, since the lock mechanism 140 is comprised with the general key 141, a structure is simplified and manufacturing and construction labor can be reduced.

  Further, since the retracting portion 120 is formed so as to be inclined so that the suspending side of the door main body 103 becomes higher, when the hand is released after the opening door 102 is opened, the slide plate 130 automatically opens the opening 110. Return to the position to block. In addition, since the slide plate 130 has a small area, its weight is small, it can be slid with a light force, and it is difficult to bend, so that the reinforcing ribs can be reduced.

  In the present embodiment, the opening 110 is formed below the door knob 32, but may be formed above the door knob 32. However, in consideration of use by a short child, it is preferable that it is formed below.

(Third embodiment)
A third embodiment for implementing the door differential pressure adjusting mechanism according to the present invention will be described in detail with reference to FIGS. 6 and 7.

  As shown in FIGS. 6 and 7, the door differential pressure adjusting mechanism 201 has an opening 210 formed in, for example, a central portion of the door main body 203. Note that the position of the door differential pressure adjusting mechanism 201 is not limited to the central portion of the door main body 203 as long as it is formed on a side portion of the lock mechanism 240 described later. The opening 210 has, for example, a substantially square shape when viewed from the front. Note that the shape of the opening 210 is not limited to a square. In order to ensure a large area of the communication opening 211 (see FIG. 7) with a small amount of sliding, it is advantageous to have a longer length in the direction intersecting the sliding direction, but if the necessary area of the communication opening 211 can be ensured, The shape of the opening 210 is not limited. In the present embodiment, the retracting portion 220 is formed in a door pocket shape adjacent to the upper side of the opening 210. The lead-in portion 220 is formed to extend to the left and right sides and the lower side of the opening portion 210 and accommodates the peripheral edge portion 231 of the slide plate 230. The lead-in part 220 is deeply formed in the upper part, and the slide plate 230 slides in the back part.

  The slide plate 230 is formed thin and can slide upward into the retracting portion 220. A handle 33 is provided at the lower end of the slide plate 230.

  In this embodiment, a lock mechanism 240 that locks the slide plate 230 at the position of the opening 210 is provided on the door main body 203 and can be projected and retracted on the slide plate 230 side, and the lock pin 241 formed on the slide plate 230 is locked. And a locking hole 246 into which is inserted.

  The lock pin 241 is provided so as to extend along a direction (horizontal direction along the surface of the door main body 203 in the present embodiment) intersecting the sliding direction (vertical direction) inside the door main body 203. The lock pin 241 is provided on the suspension side of the thumb turn 43. The lock pin 241 is formed such that its tip end protrudes to the inside of the slide plate 230 beyond the side surface of the pull-in portion 220 on the side of the opening 210. On the other hand, a lock pin 243 (dead bolt) for fixing the door body 203 to the three-way frame 4a is provided on the hand side of the thumb turn 43, which is the position opposite to the lock pin 241. The lock pin 243 extends in the horizontal direction and is formed to have a length protruding to the inside of the three-way frame 4a. Each lock pin 241, 243 is connected to the thumb turn 43 via a link mechanism 244. Since the link mechanism 244 is formed by rotating the same structure as the link mechanism 44 of the first embodiment by 90 degrees, the same reference numerals are given and description of the structure and operation is omitted.

  The locking hole 246 is formed so as to open to the side surface on the hand side of the slide plate 230 and to face the side surface of the drawing portion 220 on the side of the opening 210. The locking hole 246 is formed at a position where the lock pin 241 appears and disappears when the slide plate 230 is positioned where the opening 210 is blocked. The three-way frame 4a is formed with a frame locking hole 247 into which the lock pin 243 is inserted.

  Since other configurations are the same as those in the first embodiment, the same reference numerals are given and description thereof is omitted.

  Next, the operation of the present invention will be described while explaining the operation method of the door differential pressure adjusting mechanism 201 having the above-described configuration.

  As shown in FIG. 6, the opening door 202 provided with such a door differential pressure adjusting mechanism 201 has the lock pins 241 and 243 inserted in the locking holes 246 and the frame locking holes 247, respectively. It is closed. In this embodiment, in this state, the opening door 202 is locked. When the opening door 202 is closed in the unlocked state, the thumb turn 43 is rotated to the state shown in FIG. 7, but the opening door 202 is unlocked and the slide plate 230 is unlocked at the same time. . At this time, since the slide plate 230 is in a position to close the opening 210 due to its own weight, the opening 210 does not open without permission.

  When opening / closing of the door body 203 is heavy due to a pressure difference between the inside and outside of the opening door 202 and the door body 203 is opened and closed, when the opening of the sliding plate 230 is released, the handle 33 is held upward. Push to slide the slide plate 230 into the retracting section 220. At this time, since the slide plate 230 moves along the surface of the door main body 203 as in the first embodiment, the slide plate 230 can be easily slid without being affected by the differential pressure. The differential pressure is adjusted. Thereafter, the opening door 202 can be easily opened.

  Further, in this embodiment, the slide plate 230 is slid upward, so that when the hand is released, the slide plate 230 automatically returns to the position where the opening 210 is closed. Furthermore, by simply rotating one thumb turn 43, the door 202 can be locked and unlocked, and the slide plate 230 can be locked and unlocked simultaneously.

(Fourth embodiment)
A fourth embodiment for carrying out the door differential pressure adjusting mechanism according to the present invention will be described in detail with reference to FIGS. 8 and 9.

  As shown in FIGS. 8 and 9, the door differential pressure adjusting mechanism 201 ′ is configured such that the slide plate 230 having the same configuration as that of the third embodiment can be fixed while being slid upward. Since other configurations are the same as those of the third embodiment, the same reference numerals are given and description thereof is omitted.

  A handle 233 to which one end of the wire 234 is fixed is provided at the lower end of the slide plate 230. The handle 233 is formed to extend in the width direction of the opening 210. The wires 234 are fixed to both ends of the handle 233, respectively, and extend upward. On the other hand, a folding bar 235 for folding the wires 234 and 234 downward is provided near the upper end of the opening 210. The folding bar 235 is bridged and fixed between the surfaces of the door body 203 at both ends in the width direction of the opening 210. A locking bar 236 that is locked to a locking portion 237 provided at an intermediate portion in the height direction of the opening 210 is fixed to the ends of the wires 234 and 234 that are folded back by the folding bar 235. Yes. A pair of locking portions 237 are provided on the surface of the door main body 203 at both ends in the width direction of the opening 210, and the tips are bent downward. The locking bar 236 is formed longer than the width of the opening 210, and both ends thereof are locked to the locking portions 237 and 237, respectively. When the locking bar 236 is locked to the locking portion 237, the locking bar 236 is once lowered below the lower end portion of the locking portion 237. The bar 236 is formed deeper upward by the length of the pull-down of the bar 236.

  According to the door differential pressure adjusting mechanism 201 ′ having such a configuration, in addition to obtaining the same function and effect as in the third embodiment, the weight or the like can be used by lowering the locking bar 236 downward. Since the slide plate 230 can be pulled up, the slide plate 230 can be pulled up with a lighter force than when the slide plate 230 is simply lifted upward.

  Further, the sliding plate 230 is slid upward, and the locking bar 236 is locked to the locking portions 237 and 237 so that the opening 210 is opened (the communication opening 211 (see FIG. 9)). As formed). According to this, even if the slide plate 230 is not pressed when the door is opened and closed, the state where the communication opening 211 is formed can be maintained. Furthermore, since the communication opening 211 can be formed in the opening door 202 even when there is no person except when the door is opened and closed, it can be used for purposes such as ventilation. Note that the mechanism for holding the slide plate 230 in an opened state is not limited to the above-described mechanism. For example, when the slide plate 230 is slid upward, a lock hole ( (Not shown) may be formed separately, and the locking pin 241 may be inserted into the locking hole and locked.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in the embodiment, the slide plate is linearly slid, but the present invention is not limited to this. For example, the opening may be opened and closed by rotating the slide plate and sliding it in an arc shape. Then, if the rotation of the slide plate is interlocked with the rotation of the door knob, it is possible to reduce the trouble of sliding the slide plate. In this case, for example, it is preferable to increase the amount of rotation of the slide plate with respect to the amount of rotation of the door knob by, for example, providing a gear mechanism between the rotation shaft of the door knob and the rotation shaft of the slide plate.

DESCRIPTION OF SYMBOLS 1 Differential pressure adjustment mechanism for doors 3 Door main body 10 Opening part 20 Pull-in part 30 Slide board 40 Lock mechanism 41 Lock pin 46 Locking hole 101 Differential pressure adjustment mechanism for doors 103 Door main body 110 Opening part 120 Pull-in part 130 Slide board 140 Lock Mechanism 141a Dead bolt (lock pin)
146 Locking hole 201 Door differential pressure adjusting mechanism 203 Door main body 210 Opening part 220 Pull-in part 230 Slide plate 240 Lock mechanism 241 Lock pin 246 Locking hole 201 ′ Door differential pressure adjusting mechanism

Claims (5)

A door differential pressure adjustment mechanism for adjusting the differential pressure generated inside and outside the door,
An opening formed in a part of the door body;
A lead-in portion formed in the door body adjacent to the opening;
A door differential pressure adjusting mechanism comprising: a sliding plate that closes the opening and is slidable on the retracting portion. The door differential pressure adjusting mechanism according to claim 1, wherein the slide plate or the door main body is provided with a lock mechanism for locking the slide plate at the position of the opening. The locking mechanism is
A lock pin provided on the side of the door body along the direction intersecting the sliding direction on the sliding plate;
The door differential pressure adjusting mechanism according to claim 2, comprising a locking hole formed in the door main body and into which the lock pin is inserted. The locking hole is formed so as to penetrate from the opening side surface of the door body to the outer peripheral side surface,
The lock pin penetrates the locking hole of the door body and is configured to be inserted into a frame locking hole formed in a frame body around the door body. Item 4. The differential pressure adjusting mechanism for a door according to Item 3. The slide plate is configured to be slidable from the hand side of the door body toward the suspension side,
The door differential pressure adjusting mechanism according to any one of claims 1 to 4, wherein the pull-in portion is formed so as to be inclined so that a suspension base side of the door main body is higher.

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