Door device

Abstract

To provide a door device, including a differential pressure relaxation mechanism, in which a door is constituted by a first door body and a second door body, which can solve the problem caused by a gap generated between the first door body and the second door body when only the first door body is opened when differential pressure occurs.SOLUTION: A door for opening / closing an opening is constituted by a first door body 2 and a second door body 3; the opening can be opened by an integral rotation of the first door body 2 and the second door body 3 to a first side from a state in which the opening is closed completely; in the state in which the opening is closed completely, a first portion (door-tail side aspect surface 23) extending in the height direction on the door-tail side of the first door body 2 and a second portion (door-front side aspect portion 34) extending in the height direction on the door-front side of the second door body 3 face each other in proximity; the first door body 2 can be rotated with respect to a second portion of the second door body 3 in the closed state so that the first portion is separated to the second side. The second portion (door-front side aspect 34) is provided with an inclined portion extending from the second side toward the first side to the door-front side in a plan view, to form finger pinch reducing means.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a door device, and more particularly to a door device equipped with a pressure difference mitigation mechanism that, when an air pressure difference occurs between a first space and a second space separated by a door when the opening is in a fully closed state, can mitigate the pressure difference between the first space and the second space, thereby reducing the opening force of the door. [Background technology]

[0002] In buildings equipped with smoke control measures such as smoke exhaust equipment and pressurized smoke exhaust equipment that prevent smoke from entering by creating a pressure difference between adjacent rooms in the event of a fire, a pressure difference may occur between the inside and outside of a door when the opening is fully closed.If this pressure difference creates resistance to the opening of the door, making it difficult to open, it may hinder evacuation and firefighting activities.

[0003] In response to this, there is a door device in which the door is divided vertically into two parts, a door end side and a door tail side, and the two door bodies are normally connected to be able to open and close as a single door, and when pressure is applied, the door bodies are released from the connection and open like two pieces, creating a gap that connects the inside and outside spaces of the door, thereby reducing the pressure difference.For example, Patent Document 1 proposes a differential pressure reduction mechanism in which the door is divided into a hanging door and a door end door, and the door end door, which has a smaller area, is opened first, thereby reducing the pressure difference between the first space and the second space and reducing the opening force of the door.

[0004] In this type of door device, under normal circumstances the two door bodies can be opened and closed as a unit; however, when pressure is applied the connection between the two door bodies is released and they break, creating a gap. After the pressure difference is eliminated, the doors return to being a single unit, so it is necessary to anticipate the possibility that a finger may be placed in this gap. [Patent Document 1] Patent No. 5535348 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] The present invention aims to address issues caused by a gap that occurs between a first door body and a second door body when only the first door body is opened in a door device equipped with a differential pressure mitigation mechanism in which the door is composed of a first door body and a second door body when a differential pressure occurs. [Means for solving the problem]

[0006] The technical means adopted in the present invention to solve such problems are as follows: The door for opening and closing the opening is composed of a first door body and a second door body, The opening can be opened by rotating the first door body and the second door body together toward the first side from a fully closed position of the opening, In the fully closed position of the opening, a first portion extending in the height direction at the door end side of the first door body and a second portion extending in the height direction at the door tip side of the second door body are close to each other and face each other. The first door is rotatable such that the first portion is separated toward the second side with respect to the second portion of the second door in a closed position, At least a portion of at least one of the first and second portions is provided with a finger pinching shock absorbing means. Door device.

[0007] In one embodiment, the finger pinching impact mitigation means is an inclined portion extending from the second side toward the first side in a plan view, The inclined portion is positioned in the gap formed between the first portion and the second portion when the first portion of the first door body rotated relative to the second door body approaches the second portion. In one embodiment, the inclined portion is formed in the second portion. In addition, a slope may be formed in the first portion.

[0008] In one embodiment, the inclined portion includes at least two inclined portions extending in a stepped manner in a plan view.

[0009] In one embodiment, the inclined portion is formed in the second portion, the first portion comprises a trailing edge side projected surface and a protruding piece extending from a second side of the trailing edge side projected surface toward the trailing edge side, and when the first door body and the second door body are integrated, a tip of the protruding piece is adjacent to the second side portion of the inclined portion, and a first side portion of the trailing edge side projected surface is adjacent to the first side portion of the inclined portion, When the first portion of the first door body rotated relative to the second door body approaches the second portion, the inclined portion faces the first side portion of the first portion.

[0010] In one embodiment, the intermediate portion of the inclined portion in the inclination direction forms a convex portion extending in the height direction, and the inclined portion is formed from a first inclined portion on a first side, a second inclined portion on a second side, and a third inclined portion formed on the convex portion.

[0011] In one embodiment, the first door body and the second door body are integrated by a connecting means to form a door body, and when the connecting means is released, only the first door body can rotate, The inclined portion is formed in a portion including a central portion in a height direction of at least one of the first portion and the second portion, The elements of the connecting means are provided at a portion other than the inclined portion.

[0012] In one embodiment, said element of said connecting means is provided at an upper end portion of at least one of said first portion and said second portion. This allows the finger pinching impact mitigation means (inclined portion) to be located at a position where the operator's hand is likely to be positioned. In one aspect, in the fully closed position of the opening, a third portion extending in the width direction above the first door body and a fourth portion extending in the width direction above the second door body are closely opposed to each other, and a fifth portion extending in the width direction below the first door body and a sixth portion extending in the width direction below the second door body are closely opposed to each other, and the elements of the connecting means may be provided at the opposed portions extending in the width direction (the third portion and the fourth portion, or the fifth portion and the sixth portion). Effect of the Invention

[0013] In the present invention, in the fully closed position of the opening, a first portion extending in the height direction at the door end side of the first door body and a second portion extending in the height direction at the door tip side of the second door body are close to and opposed to each other, and a finger pinch shock mitigation means is provided in at least a portion of at least one of the first portion and the second portion, thereby ensuring safety in the unlikely event that a finger is pinched between the first portion and the second portion. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a front view of the door device according to the present embodiment (with the opening fully closed), as viewed from the first space side. [Diagram 2] FIG. 2 is a front view of the door device according to the present embodiment (with the opening fully closed), as viewed from the second space side. [Diagram 3] FIG. 4 is a front view of the first door according to the embodiment, as viewed from the first space side. [Figure 4] FIG. 4 is a front view of the second door body according to the embodiment, as viewed from the first space side. [Diagram 5] The left figure is a vertical cross-sectional view seen from direction A in Fig. 1. The right figure is a vertical cross-sectional view seen from direction B in Fig. 1. [Figure 6] The upper, middle, and lower figures are cross-sectional views taken along directions C, D, and E in FIG. 1, respectively. [Figure 6A] 7 is a partial enlarged view of the locking portion (connecting portion) of the first door body and the second door body in the middle diagram of FIG. 6. FIG. [Figure 7] The left figure is a partial side view of the latch lock provided on the rear end of the first door body in Figure 3, viewed from direction C, and the right figure is a partial side view of the electric strike provided on the front end of the second door body in Figure 4, viewed from direction C. [Figure 8] 4 is a cross-sectional view of the trailing edge portion of the first door body, the upper view being a cross-sectional view seen from direction A in FIG. 3, and the lower view being a cross-sectional view seen from direction B in FIG. [Figure 9] 5 is a cross-sectional view of the door front portion of the second door body, the upper figure being a cross-sectional view seen from direction A in FIG. 4, and the lower figure being a cross-sectional view seen from direction B in FIG. [Figure 10]FIG. 7 is a partially enlarged view of the lower diagram of FIG. 6, showing the alignment between the trailing edge side projecting surface of the first door body and the leading edge side projecting portion of the second door body. [Figure 11] A diagram showing another embodiment of the front door side projection portion of the second door body. [Figure 12] 11A and 11B are diagrams illustrating a finger pinch reducing means according to the embodiment. [Figure 13] FIG. 13 is a diagram for explaining a problem caused by a gap that occurs between a first door body and a second door body in a conventional door device equipped with a differential pressure mitigation mechanism in which the door is composed of a first door body and a second door body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The door device according to the present embodiment is installed in an opening provided in a building structure that separates a first space from a second space. The building in which the door device is installed is equipped with smoke control means such as a smoke exhaust system or a pressurized smoke control system that prevents smoke from entering by creating a pressure difference between adjacent rooms in the event of a fire, and when the opening is fully closed, the pressure in the first space may be greater than the pressure in the second space. That is, in the present embodiment, when the opening is fully closed, the air pressures in the first space and the second space are generally the same under normal circumstances, but in an emergency such as a fire, the smoke control means causes the first space to be higher in pressure than the second space. The door device according to the present embodiment is equipped with a pressure difference mitigation mechanism, and thus allows the door to be opened smoothly even when an air pressure difference occurs between the first space and the second space.

[0016] The door device according to this embodiment opens and closes an opening formed by a door frame 1, and is equipped with a door composed of a first door body (leading door body) 2 located on the leading side and a second door body (trailing door body) 3 located on the trailing side, the first door body 2 being rotatably attached to the second door body 3, which is rotatably attached to the door frame 1. The door (first door body 2, second door body 3) according to this embodiment is a hinged door that opens an opening in a building by rotating from a fully closed position of the opening to the first space side. In this specification, the side on which the door opens is referred to as the "first space side" or "first side", and the opposite side is referred to as the "second space side" or "second side". As will be described later, the door device in this embodiment is a parent-child double-leaf door, and the opening is closed by a door body consisting of a first door body 2 and a second door body 3, and a third door body 4, but the door device may be a single-leaf door or a double-leaf door, and a single-leaf door closes the opening only by the door body consisting of the first door body 2 and the third door body (see Figure 12).

[0017] The door frame 1 is a rectangular frame consisting of an upper frame 10, a first vertical frame 11, a second vertical frame 12, and a lower frame 13, and has an opening formed therein. In the door consisting of the first door body 2 and the second door body 3, the second vertical frame 12 is a vertical frame at the end of the door, and in the third door body 4, the first vertical frame 11 is a vertical frame at the end of the door. The door consisting of the first door body 2 and the second door body 3 is wider than the third door body 4, but is not limited to this and may be narrower or the same width. The door consisting of the first door body 2 and the second door body 3 is used as a main door. In one embodiment, the third door body 4 is normally in a closed position, and the door consisting of the first door body 2 and the second door body 3 opens and closes a vertical rectangular opening formed on the door end side of the third door body 4 in the closed position (the door end side part of the third door body 4 is the door end side part of the opening). The first door body 2 and the second door body 3 form a vertically rectangular door when the first door body 2 is in a closed position relative to the second door body 3 and is integrated together, thereby closing the vertically rectangular opening.

[0018] The door device of this embodiment is equipped with a differential pressure relief mechanism or differential pressure relief means, and during normal door opening from the fully closed position of the opening, the rotation of the first door body 2 relative to the second door body 3 is restricted so that the first door body 2 and the second door body 3 can rotate together, and if a differential pressure that acts as resistance to door opening is generated during the initial movement of opening the door from the fully closed position of the opening, only the first door body 2 is rotated first to eliminate the differential pressure, and then the first door body 2 and the second door body 3 are rotated to open the opening.

[0019] In this embodiment, the differential pressure mitigation means includes a coupling device consisting of a first member provided on the first door body 2 and a second member provided on the second door body 3, and the coupling device is capable of coupling the first door body 2 in the closed position to the second door body 3. The coupling device is normally in a locked state and restricts the rotation of the first door body 2 relative to the second door body 3, allowing the first door body 2 and the second door body 3 to rotate together, and the coupling device is released from the locked state based on a signal generated in an emergency such as a fire, allowing the first door body 2 to rotate relative to the second door body 3, and when a differential pressure that acts as a resistance to door opening occurs at the initial opening movement of the door from the fully closed position of the opening, only the first door body 2 is allowed to rotate. Note that the differential pressure mitigation means is not limited to one that uses such a coupling device, and for example, a known differential pressure mitigation means (for example, a differential pressure mitigation mechanism disclosed in Patent Document 1) may be used.

[0020] Fig. 1 is a front view of the door device according to this embodiment as seen from the first space side, and Fig. 2 is a front view of the door device as seen from the second space side. In the door device according to this embodiment, the door that opens and closes the opening formed by the door frame 1 is a double-leaf door consisting of a main door made up of a first door body 2 and a second door body 3, and a third door body 4. The first door body 2 is a door-end side door body that is mainly located on the door-end side, and the second door body 3 is a door-end side door body that is mainly located on the door-end side. The first door body 2 is rotatably attached to the second door body 3, and the second door body 3 is rotatably attached to the second vertical frame 12 of the door frame 1. The third door body 4 is rotatably attached to the first vertical frame 11 of the door frame 1.

[0021] As shown in Figures 1 to 3, the first door body 2 has a first visible surface 20 facing the first space, a second visible surface 21 facing the second space, a vertically extending leading edge side visible surface 22, a vertically extending trailing edge side visible surface 23, a horizontally extending leading edge side upper surface 24, a horizontally extending trailing edge side upper surface 25, an upper intermediate visible surface 26 extending vertically between the trailing edge side end of the leading edge side upper surface 24 and the leading edge side end of the trailing edge side upper surface 25, a horizontally extending leading edge side lower surface 27, a horizontally extending trailing edge side lower surface 28, and a lower intermediate visible surface 29 extending vertically between the trailing edge side end of the leading edge side lower surface 27 and the leading edge side end of the trailing edge side lower surface 28. The height dimension of leading edge side projected surface 22 is greater than the height dimension of trailing edge side projected surface 23, leading edge side upper surface 24 is located higher than trailing edge side upper surface 25, and leading edge side lower surface 27 is located lower than trailing edge side lower surface 28. The first door body 2 has a stepped upper surface (leading edge side upper surface 24 and trailing edge side upper surface 25) and a stepped lower surface (leading edge side lower surface 27 and trailing edge side lower surface 28), and has a horizontally convex shape when viewed from the front.

[0022] A cutout part having a rectangular shape in a front view is formed at the lower end part of the first door body 2 on the door end side, and a closing body 5 having a rectangular shape in a front view is rotatably provided in the cutout part. In the opening closed state, the closing body 5 can be rotated to form an opening for inserting a fire hose. The first visible surface 50 of the closing body 5 forms a part of the first visible surface 20 of the first door body 2, the second visible surface 51 of the closing body 5 forms a part of the second visible surface 21 of the first door body 2, the first side end surface 52 of the closing body 5 forms a part of the door end side visible surface 22 of the first door body 2, the second side end surface 53 of the closing body 5 is close to the side end surface of the cutout part, the upper end surface 54 of the closing body 5 is close to the upper end surface of the cutout part, and the lower end surface 55 of the closing body 5 forms a part of the door end side lower surface 27 of the first door body 2. The gap between the closing body 5 and the cutout portion is a stepped portion, so that a gap passing linearly between the first space and the second space is not formed.

[0023] As shown in FIG. 1, FIG. 2, and FIG. 4, the second door body 3 has a first visible surface 30 facing the first space, a second visible surface 31 facing the second space, a vertically extending upper door front side visible surface 32, a vertically extending lower door front side visible surface 33, a door front side visible portion 34 located on the door trailing side relative to the upper door front side visible surface 32 and the lower door front side visible surface 33, and an upper door front side visible portion 34 extending horizontally between the lower end of the upper door front side visible surface 32 and the upper end of the door front side visible portion 34. It has a horizontal surface 35, a lower horizontal surface 36 extending horizontally between the upper end of the lower front door side projected surface 33 and the lower end of the front door side projected portion 34, a vertically extending trailing edge side projected surface 37, an upper end surface 38 extending horizontally between the upper end of the upper front door side projected surface 32 and the upper end of the trailing edge side projected surface 37, and a lower end surface 39 extending horizontally between the lower end of the lower front door side projected surface 33 and the lower end of the trailing edge side projected surface 37, and in other words has a horizontally concave shape.

[0024] The trailing edge portion of the second door body 3 (the trailing edge prospective surface 37 in this embodiment) is rotatably attached to the second vertical frame 12 of the door frame 1 by a hinge 14. The second door body 3 is biased in the closing direction relative to the door frame 1 by a door closer 15 provided adjacent to the trailing edge portion of the upper frame 10 of the door frame 1. In the illustrated embodiment, the trailing edge portion of the second door body 3 is attached to the second vertical frame 12 by the hinge 14, but for example, the second door body 3 may be rotatably attached to the trailing edge portions of the upper frame 10 and the lower frame 13 using a pivot hinge (for example, a center-hung type or a support-hung type).

[0025] 1, 2, and 6, the third door body 4 is composed of a first visible surface 40 facing the first space, a second visible surface 41 facing the second space, a vertically extending leading edge visible surface 42, a vertically extending trailing edge visible surface 43, a horizontally extending upper end surface 44, and a horizontally extending lower end surface 45. The trailing edge portion of the third door body 4 (the trailing edge visible surface 43 in this embodiment) is rotatably attached to the first vertical frame 11 of the door frame 1 by a hinge 14.

[0026] The first door body 2 is rotatably attached to the second door body 3, and when the first door body 2 is in a closed position relative to the second door body 3, the first door body 2 and the second door body 3 are integrated to form a single door. The shapes of the first door body 2 and the second door body 3 shown in the figure are examples, and the shapes of the first door body 2 and the second door body 3 are not limited to the illustrated form as long as the first door body 2 is allowed to rotate relative to the second door body 3, and when the first door body 2 is in a closed position relative to the second door body 3, the first door body 2 and the second door body 3 are integrated to form a single door. For example, in a door formed from the first door body and the second door body, the height dimension of the first door body may be lower than the height dimension of the door, and the upper and lower door front end side prospective surfaces of the second door body may form the upper and lower parts of the door front end side prospective surface of the door.

[0027] In this embodiment, when the first door body 2 is in a closed position relative to the second door body 3, the upper intermediate projected surface 26 of the first door body 2 and the upper leading edge projected surface 32 of the second door body 3, the lower intermediate projected surface 29 of the first door body 2 and the lower leading edge projected surface 33 of the second door body 3, the peripheral surfaces of the convex portion of the first door body 2 (tail end side upper surface 25, tail end side projected surface 23, tail end side lower surface 28) and the peripheral surfaces of the concave portion of the second door body 3 (upper horizontal surface 35, leading edge side projected portion 34, lower horizontal surface 36) are closely opposed to each other with gaps between them.

[0028] When the first door body 2 is in a closed position relative to the second door body 3, the leading edge side prospective surface 22 of the first door body 2 becomes the leading edge side prospective surface of the main door, the trailing edge side prospective surface 37 of the second door body 3 becomes the trailing edge side prospective surface of the main door, the leading edge side upper surface 24 of the first door body 2 and the upper end surface 38 of the second door body 3 become the upper end surfaces of the main door, and the leading edge side lower surface 27 of the first door body 2 and the lower end surface 39 of the second door body 3 become the lower end surfaces of the main door.

[0029] A handle H is provided at the door-end side of the first door body 2's first visible surface 20 and second visible surface 21 at a position intermediate in the height direction. A latch (not shown) is built into the door-end side of the first door body 2, and the latch can move between an engagement position protruding from the door-end side visible surface 22 and a retracted position retracted into the door-end side visible surface 22. The latch is biased to maintain the engagement position, and when the first door body 2 is in the closed position, the latch is engaged with a latch receiver (not shown) formed on the door-end side visible surface 42 of the third door body 4, thereby maintaining the closed position of the first door body 2. By operating the handle H, the latch in the engagement position is moved to the retracted position, and the engagement state of the door-end side of the first door body 2 is released, and the first door body 2 can be opened. When the first door body 2 and the second door body 3 are connected and integrated, the latch can be released by operating the handle H, allowing the main door (first door body 2 + second door body 3) to be opened.

[0030] The first door body 2 is attached to be rotatable by a hinge closer consisting of an upper hinge part P1 and a lower hinge part P2 at a door leading part of the trailing edge upper surface 25 and a door leading part of the trailing edge lower surface 28 relative to a door leading part of an upper horizontal surface 35 and a door leading part of a lower horizontal surface 36 of the second door body 3. In this embodiment, the rotation axis P (see FIG. 6) is located in the center of the width of the first door body 2, but the position of the rotation axis P may be offset toward the door leading side or the trailing edge side from the center in the width direction of the first door body 2.

[0031] The first door body 2 is biased in a direction (closing direction) to maintain the closed posture relative to the second door body 3. In this embodiment, the hinge closer is a hinge closer equipped with a spring that biases the first door body 2 in the closing direction, and also functions as a closing means for the first door body 2. More specifically, a spring constituting the closing means for the first door body 2 is built into at least one of the upper and lower hinge parts (in the illustrated embodiment, the lower hinge part P2), and the first door body 2 is biased in the closing direction by the spring. In this embodiment, the closing force of the first door body 2 (hinge closer) is set smaller than the closing force of the second door body 3 (door closer 15), but is not limited to this. In this embodiment, the closing means for the first door body 2 is built into the hinge closer, but the closing means may be provided independently of the rotating part (hinge) of the first door body 2. For example, instead of a hinge closer, a pivot hinge (such as a center-suspended type or a support-suspended type) that does not have a closing means may be employed, and a part (closing means) that has a separate biasing force may be provided.

[0032] In this embodiment, the lower hinge part P2 has a built-in torque and speed adjustment mechanism for the hinge closer, and a square opening is formed in the first mounting surface 20 of the first door body 2 at the lower hinge part P2, and a steel or stainless steel cover plate 200 is removably fixed to the opening with screws (see Figure 3).

[0033] The door device is equipped with a connecting device for connecting the first door body 2 and the second door body 3 in the closed position. As described above, the first door body 2 is biased in a direction to maintain the closed position relative to the second door body 3, but when the connecting device is in a locked state, the closed position of the first door body 2 relative to the second door body 3 is fixed, and the rotation of the first door body 2 relative to the second door body 3 is restricted. Under normal circumstances, the connecting device is in a locked state, the first door body 2 is fixed to the second door body 3 in the closed position, and the first door body 2 and the second door body 3 rotate together as a single door.

[0034] In this embodiment, the connecting device is configured so that the locked state is released based on a signal generated in an emergency such as a fire. When the locked state is released (i.e., when the fixed state of the first door body 2 relative to the second door body 3 is released), the first door body 2 becomes rotatable relative to the second door body 3, and only the first door body 2 can rotate when the door first moves to open from the fully closed position of the opening.

[0035] The connecting device is composed of a first member provided on the first door body 2 and a second member provided on the second door body 3, and the connecting device is locked when the first member and the second member are fixed together. The first member and the second member are provided at predetermined positions on the first door body 2 and the second door body 3, respectively, so as to face each other when the first door body is in a closed position relative to the second door body 3.

[0036] In one embodiment, the coupling device is an electric lock, and the combination of the first member and the second member is selected from, for example, a combination of an electric strike and a latch lock, a combination of a motor lock and a strike, and a combination of an electromagnet and a magnetic body. In this embodiment, as described later, a combination of an electric strike and a latch lock is adopted.

[0037] In the fully closed position of the opening, the gaps between the door frame 1 and the main door (first door body 2, second door body 3) and the third door body 4, and the gap between the first door body 2 and the second door body 3 are sealed by the airtight member S.

[0038] As shown in Figure 6, in the first vertical frame 11 of the door frame 1, a groove portion that opens toward the first space is formed along the opening height direction on the second space side of the projected surface 110 that closely faces the trailing edge side projected surface 43 of the third door body 4 in the closed position, and an airtight member S is provided in the groove portion, so that the second side corner portion on the trailing edge side of the third door body 4 in the closed position abuts against the airtight member S.

[0039] As shown in Figure 6, in the second vertical frame 12 of the door frame 1, a groove portion that opens toward the first space is formed along the opening height direction on the second space side of the projected surface 120 that closely faces the trailing edge side projected surface 37 of the second door body 3 in the closed position, and an airtight member S is provided in the groove portion, so that the second side corner portion on the trailing edge side of the second door body 3 in the closed position abuts against the airtight member S.

[0040] As shown in Figure 5, in the upper frame 10, a groove portion opening toward the first space is formed along the opening width direction on the second space side of the lower surface 100 where the door-end side upper surface 24 and upper end surface 38 of the first door body 2 and the second door body 3 in the closed position are closely opposed, and an airtight member S is provided in the groove portion, so that the second side corner portions of the upper ends of the first door body 2 and the second door body 3 in the closed position abut against the airtight member S.

[0041] As shown in Figure 5, an airtight member S is provided in the lower portions of the first door body 2 and the second door body 3, which protrudes downward beyond the lower surface 27 on the door end side of the first door body 2 and the lower end surface 39 of the second door body 3 when the main door is in a fully closed position, and the airtight member S is adapted to be in close contact with the upper surface 130 of the lower frame 13 when the opening is fully closed.

[0042] As shown in Fig. 6, the first side in the projection direction of the leading-side projected surface 42 of the third door body 4 is a concave step, and a groove opening toward the first space is formed in the height direction in the second side portion, and an airtight member S is provided in the groove. The leading-side projection 220 is formed on the first side in the projection direction of the leading-side projected surface 22 of the first door body 2, and a concave step is formed on the second side, so that when the first door body 2 and the third door body 4 are in the closed position, the leading-side projected surface 22 of the first door body 2 and the leading-side projected surface 42 of the third door body 4 are close to each other, the leading-side projection 220 of the first door body 2 is located in the step on the first side of the third door body, and the corner of the step on the second side of the first door body 2 is in close contact with the airtight member S provided in the groove of the third door body 4.

[0043] When the first door body 2 is in a closed position relative to the second door body 3, the upper intermediate projected surface 26 of the first door body 2 and the upper front end projected surface 32 of the second door body 3, the lower intermediate projected surface 29 of the first door body 2 and the lower front end projected surface 33 of the second door body 3, the peripheral surfaces of the convex portion of the first door body 2 (tail end side upper surface 25, tail end side projected surface 23, tail end side lower surface 28) and the peripheral surfaces of the concave portion of the second door body 3 (upper horizontal surface 35, front end side projected portion 34, lower horizontal surface 36) are closely opposed to each other with gaps between them.

[0044] As shown in the upper diagram of Figure 6, a vertically extending groove is formed in the second side portion of the upper intermediate projected surface 26, located in the gap between the upper intermediate projected surface 26 of the first door body 2 and the upper door front side projected surface 32 of the second door body 3, and an airtight member S is provided in the groove along the height direction so that the second side portion of the upper door front side projected surface 32 of the second door body 3 is in close contact with the airtight member S.

[0045] Located in the gap between the lower intermediate projected surface 29 of the first door body 2 and the lower door-end side projected surface 33 of the second door body 3, a vertically extending groove is formed in the second side portion of the lower intermediate projected surface 29, and an airtight member is provided in the groove along the height direction so that the second side portion of the lower door-end side projected surface 33 of the second door body 3 is in close contact with the airtight member (similar to the configuration shown in the upper diagram of Figure 6).

[0046] 5, a horizontally extending groove is formed in the gap between the trailing edge upper surface 25 of the first door body 2 and the upper horizontal surface 35 of the second door body 3, and an airtight member S is provided in the groove in the horizontal direction. The second space side portion of the upper horizontal surface 35 of the second door body 3 is a recessed portion consisting of a horizontal surface 350 and a vertical surface 351, and when the opening is fully closed, the groove is located in the recessed portion, and the airtight member S is in close contact with the vertical surface 351 to block the second side portion of the gap between the trailing edge upper surface 25 of the first door body 2 and the upper horizontal surface 35 of the second door body 3.

[0047] 5, a horizontally extending groove is formed in the gap between the trailing edge lower surface 28 of the first door body 2 and the lower horizontal surface 36 of the second door body 3, and an airtight member S is provided in the groove in the horizontal direction. The second space side portion of the lower horizontal surface 36 of the second door body 3 is a recessed portion consisting of a horizontal surface 360 ​​and a vertical surface 361, and when the opening is fully closed, the groove is located in the recessed portion, and the airtight member S is in close contact with the vertical surface 361 to block the second side portion of the gap between the trailing edge lower surface 28 of the first door body 2 and the lower horizontal surface 36 of the second door body 3.

[0048] As shown in Figures 3 and 6, the first visible surface 20 of the first door body 2 has protrusions 260, 290 that protrude toward the door end beyond the upper middle visible surface 26 and the lower middle visible surface 29, and when the opening is fully closed, the tips of the protrusions 260, 290 are close to the upper door front side visible surface 32 and the lower door front side visible surface 33 of the second door body 3.

[0049] As shown in Figures 4 and 6, the upper door front prospective surface 32 and the lower door front prospective surface 33 of the second door body 3 are provided with a rotation restricting member 8 that protrudes in the prospective direction, and the upper middle prospective surface 26 and the lower middle prospective surface 29 of the first door body 2 are formed with an opening 9 that receives the rotation restricting member 8 and limits the movement range of the rotation restricting member 8. The rotation restricting member 8 and the opening 9 constitute a rotation angle restricting means, which allows the first door body 2 to rotate to an extent that the pressure difference can be eliminated, and restricts the rotation of the first door body 2 relative to the second door body 3 when only the first door body 2 rotates a predetermined angle from when the opening is fully closed.

[0050] As shown in the middle figure of Figure 6, Figures 8 and 9, the second visible surface 21 of the first door body 2 is a protrusion 210 that protrudes beyond the door end side visible surface 23 toward the door end side, and an airtight member 211 is provided on the inner surface at the tip side of the protrusion 210 along the height direction.

[0051] A latch lock 6 constituting the first member of the coupling device is provided at the upper end of the trailing edge projecting surface 23 of the first door body 2. A protrusion is formed at the upper end of the trailing edge projecting surface 23 of the first door body 2, and a latch L of the latch lock 6 is biased so as to protrude from an end face 23' of the protrusion. As described later, an electric strike 7 constituting the second member of the coupling device is provided opposite the latch lock 6 at the upper end of the leading edge projecting portion 34 of the second door body 3.

[0052] As shown in Fig. 9, the door-leading-side projection 34 of the second door body 3 has a door-leading-side projection surface 34' consisting of a frame body having a U-shape in cross section, and the first projection surface 30 of the second door body 3 has a protruding piece 300 that protrudes beyond the door-leading-side projection surface 34' toward the door-leading side. As shown in the lower diagram of Fig. 9, the tip of the protruding piece 300 has a first inclined surface 340 that extends in an inclined manner from the tip toward the second side and the door trailing end side in a plan view.

[0053] As shown in Fig. 9, the second visible surface 31 of the second door body 3 extends to the door-end side visible surface 34', and a second inclined surface 341 is formed at the end of the door-end side visible surface 34', which extends in a slanted manner toward the first side and the door-end side beyond the door-end side visible surface 34' in a plan view. The second inclined surface 341 extends over the entire height of the door-end side visible portion 34, and forms a U-shaped periphery in a front view together with a horizontal surface 350 of the recessed portion of the upper horizontal surface 35 and a horizontal surface 360 ​​of the recessed portion of the lower horizontal surface 36.

[0054] A protrusion 16 is provided along the height direction of the leading-side visible surface 34', except for the upper end portion. As shown in the lower diagram of Fig. 9, the protrusion 16 has a first visible surface 160 located on the first side and a second visible surface 161 located on the second side, and the width dimension of the first visible surface 160 is larger than the visible width dimension of the second visible surface 161. The protrusion 16 further has a visible surface 162 extending from the leading-side side of the first visible surface 160 to the second side, and an inclined surface 163 extending obliquely from the visible surface 162 toward the second visible surface 161 toward the trailing-side side.

[0055] The tip of the first inclined surface 340 abuts or is close to the visible surface 162, and a second side portion 1620 of the visible surface 162 is the exposed surface. The second inclined surface 341 extends over the entire height of the leading-side visible surface 34', and the tip of the second inclined surface 341 abuts or is close to the second visible surface 161, and a leading-side portion 1610 of the second visible surface 161 is the exposed surface.

[0056] In this embodiment, the door-end side projection 34 of the second door body 3 consists of a first inclined surface 340, a second inclined surface 341, a second side portion 1620 of the projection surface 162, a door-end side portion 1610 of the second projection surface 161, and an inclined surface 163, and in a plan view, as a whole, is an inclined portion extending toward the door-end side from the second side toward the first side.

[0057] In this embodiment, the first inclined surface 340 and the second inclined surface 341 extend on the same inclined surface in a plan view, and the door-end side projection 34 of the second door body 3 consists of the inclined surface and a trapezoidal convex portion in a plan view protruding from the inclined surface (a portion consisting of the second side portion 1620 of the projection surface 162, the door-end side portion 1610 of the second projection surface 161, and the inclined surface 163), and the inclined surface 163 extends parallel to the inclined surface consisting of the first inclined surface 340 and the second inclined surface 341, with a step therebetween.

[0058] A convex portion 17 having a rectangular shape in plan view is provided at the upper end of the door-end side visible surface 34'. The convex portion 17 has a first visible surface 170, a second visible surface 171, and a visible surface 172. The first visible surface 170 abuts against the inner surface of the protruding piece 300, and the tip of the second inclined surface 341 abuts or is close to the second visible surface 171. The visible surface 172 is located inside the tip of the protruding piece 300, and the first inclined surface 340 does not extend to the height position where the convex portion 17 is formed (see the right diagram in FIG. 7). As shown in FIG. 4 and FIG. 7, the upper end 3400 of the first inclined surface 340 and the upper end of the inclined surface 163 are located at the same height. The first visible surface 160 of the convex portion 16 and the first visible surface 170 of the convex portion 17 are located on the same vertical plane, the second visible surface 161 of the convex portion 16 and the second visible surface 171 of the convex portion 17 are located on the same vertical plane, and the visible surface 162 of the convex portion 16 and the visible surface 172 of the convex portion 17 are located on the same vertical plane.

[0059] An electric strike 7 is provided on a protrusion 17 provided at the upper end of the leading edge projection 34 of the second door body 3, and together with a latch lock 6 provided at the upper end of the trailing edge projection 23 of the first door body 2, this constitutes a connecting device. The connecting device consisting of the latch lock 6 and the electric strike 7 may be either an unlocking type during a power outage (locking type when power is applied) or an unlocking type during a power outage (unlocking type when power is applied). The connecting device may be comprised of a strike plate (not shown) provided on the first door body 2 and an electromagnetic lock (not shown) provided on the second door body 3.

[0060] In this embodiment, the connecting device is provided at the upper end of the trailing edge side projected surface 23 of the first door body 1 and the leading edge side projected portion 34 of the second door body 3, so that the protruding portion 16 (i.e., the inclined surface 163) is formed in the leading edge side projected portion 34 of the second door body 3 at a portion including the central portion in the height direction of the main door (first door body 2 + second door body 3) (i.e., the height position where the operator's hands are easily positioned). For example, the connecting device may be provided between the trailing edge side upper surface 25 of the first door body 2 and the upper horizontal surface 35 of the second door body 3, so that the protruding portion 16 (i.e., the inclined surface 163) is formed over the entire height of the trailing edge side projected surface 23 and the leading edge side projected surface 34 including the central portion in the height direction of the main door (first door body 2 + second door body 3) (i.e., the height position where the operator's hands are easily positioned).

[0061] As shown in Figure 10, when the first door body 2 and the second door body 3 are integrated, the tip of the protrusion 210 of the first door body 2 is close to the base end portion of the second inclined surface 341 of the second door body 3 via a clearance c2, the airtight member 211 provided on the inner surface of the protrusion 210 is in close contact with the door-front portion 1610 of the second visible surface 161 of the convex portion 16 of the second door body 3, and the tip of the protrusion 300 of the second door body 3 is close to the first side portion of the door-tail side visible surface 23 of the first door body 2 via a clearance c1. In this embodiment, the first inclined surface 340 and the second inclined surface 341 are located on a common inclined surface, but between the first inclined surface 340 and the second inclined surface 341, an inclined surface 163 is provided that extends in a stepped manner parallel to the first inclined surface 340 and the second inclined surface 341, so that the clearances c1 and c2 do not communicate in a straight line, which is advantageous in terms of fire prevention. Fig. 6A shows a cross-sectional view of the locking portion when the first door body 2 and the second door body 3 are integrated, and the latch lock 6 of the first door body 2 and the electric strike 7 of the second door body 3 are in the locked state. The tip of the protrusion 210 of the first door body 2 is close to the base end of the second inclined surface 341 of the second door body 3 via a clearance c2, the protrusion 210 and the second visible surface 171 of the convex portion 17 of the second door body 3 face each other, and the airtight member 211 provided on the inner surface of the protrusion 210 is in close contact with the second visible surface 171 of the convex portion 17. The tip of the protrusion 300 of the second door body 3 is close to the first side portion of the trailing edge side visible surface 23 of the first door body 2 via a clearance c1, and the inner surface of the protrusion 300 faces the visible surface 23'' of the protrusion formed at the upper end of the trailing edge side visible surface 23 of the first door body 2. The end surface 23' of the protrusion formed at the upper end of the trailing edge side visible surface 23 of the first door body 2 faces closely to the visible surface 172 of the protrusion 17 of the second door body 3. As shown in FIG. 6A, even in the locked portion, the clearance c1 and the clearance c2 do not communicate in a straight line, which is advantageous in terms of fire prevention.

[0062] With reference to FIG. 11, the door-end side projection 34' of the second door body 3 according to another embodiment will be described. The same reference numbers are given to the same elements as in the above-mentioned embodiment, and the above-mentioned description can be used for the elements to which the same reference numbers are given. The door-end side projection 34' has a protrusion 16' provided in the height direction, except for the upper end portion. As shown in the lower diagram of FIG. 11, the protrusion 16' has a first visible surface 160' located on the first side and a second visible surface 161' located on the second side. The protrusion 16' further has a visible surface 162' extending from the door-end side of the first visible surface 160' to the second side, and an inclined surface 163' extending in an inclined manner from the visible surface 162' to the door-end side toward the second visible surface 161'. The inclined surface 341' extends over the entire height of the door-end side visible surface 34', and the tip of the inclined surface 341' abuts or is close to the second visible surface 161', with the door-end side portion 1610' of the second visible surface 161' being the exposed surface.

[0063] In the present embodiment shown in Fig. 11, the door-end-side projecting portion 34' of the second door body 3 is composed of an inclined surface 341', a door-end-side portion 1610' of the second projecting surface 161', a projecting surface 162', and an inclined surface 163', and is an inclined portion that extends from the second side toward the first side in a plan view. The inclined surface 163' and the inclined surface 341' extend parallel to each other with a step.

[0064] As shown in Fig. 11, when the first door body 2 and the second door body 3 are integrated, the tip of the protruding piece 210 of the first door body 2 is close to the base end of the inclined surface 341' of the second door body 3 via a clearance c2, the airtight member 211 provided on the inner surface of the protruding piece 210 is in close contact with the door-front side portion 1610' of the second visible surface 161' of the convex portion 16' of the second door body 3, and the tip of the protruding piece 300' of the second door body 3 is close to the first side portion of the door-tail side visible surface 23 of the first door body 2 via a clearance c1. The inclined surface 163' and the inclined surface 341' extend parallel to each other at different levels, and the clearances c1 and c2 do not communicate linearly, which is advantageous in terms of fire prevention.

[0065] In this embodiment, when the lock state of the connecting device is released based on a signal generated in an emergency such as a fire in the opening fully closed position (i.e., when the fixed state of the first door body 2 relative to the second door body 3 is released), the first door body 2 becomes rotatable relative to the second door body 3, and when a pressure difference is generated, the first door body 2 rotates around the rotation axis P so that the door front side portion moves to the first side and the door trailing side portion moves to the second side. In this way, when a pressure difference is generated, only the first door body 2 rotates by a predetermined angle at the initial opening movement of the door from the opening fully closed position, but when the pressure difference is eliminated, the first door body 2 rotates in a direction to be integrated with the second door body 3 due to the biasing force of the hinge closer.

[0066] When the first door body 2 rotates relative to the second door body 3, the first side portion of the trailing edge side projected surface 23 of the first door body 2 moves away from the leading edge side projected portion 34 of the second door body 3 to the second side, but when the pressure difference is eliminated, the first door body 2 rotated relative to the second door body 3 rotates so that the first side portion of the trailing edge side projected surface 23 approaches the leading edge side projected portion 34 of the second door body 3. A little before the first door body 2 becomes closed relative to the second door body 3, a narrow gap is formed between the first side portion of the trailing edge side projected surface 23 of the first door body 2 and the leading edge side projected portion 34 of the second door body 3, so that a finger can be pinched. More specifically, when the first corner of the tail-side projected surface 23 of the first door body 2 rotated relative to the second door body 3 approaches the leading-side projected portion 34 of the second door body 3, the first corner and the inclined portion (first inclined surface 340, second inclined surface 341, inclined surface 163) of the leading-side projected portion 34 face each other, forming a gap between them. Even if the operator's finger is positioned in this gap, one of the portions forming the gap is the inclined portion (first inclined surface 340, second inclined surface 341, inclined surface 163), so that even if the finger is pinched, the impact is mitigated. By ensuring a space for providing the electric strike 7 at the upper end of the leading-side projected portion 34 of the second door body 3, the inclined portion (first inclined surface 340, inclined surface 163) is not formed, but the electric strike 7 is located at a height position that is difficult to reach, so that the possibility of the finger being pinched by mistake is extremely low.

[0067] This will be explained by comparing Fig. 12 and Fig. 13. In the embodiment shown in Fig. 12 and Fig. 13, the door device is a single-leaf door, and the opening formed by the frame is opened and closed by a door consisting of a first door body and a second door body. The door is rotatable with respect to the second vertical frame 12 by a pivot hinge 14'. Fig. 13 shows a case where a finger is placed in a gap between the first door body 2' and the second door body 3' in a conventional door device equipped with a differential pressure mitigation mechanism consisting of a first door body and a second door body. Just before the first door body 2' is closed relative to the second door body 3', a narrow gap is formed between the trailing edge portion of the first door body 2' and the leading edge portion of the second door body 3', but since this gap is formed between a corner of the trailing edge portion of the first door body and a corner of the leading edge portion of the second door body, a finger placed in this gap will be pinched between the corners.

[0068] In contrast, in this embodiment, as shown in Figure 12, shortly before the first door body 2 is closed relative to the second door body 3, a gap narrow enough for a finger to be pinched is formed between the trailing edge portion of the first door body 2 and the leading edge portion of the second door body 3. However, this gap is formed between the first corner of the trailing edge side projected surface 23 of the first door body 2 of the first door body 2 and the inclined portion of the leading edge side projected portion 34 of the second door body 3 (first inclined surface 340, second inclined surface 341, inclined surface 163). Therefore, a finger placed in this gap comes into contact with the inclined portion of the leading edge side projected portion 34 of the second door body 3, so the impact is mitigated compared to when the finger is pinched between the corners on both sides, and the impact when the finger is removed from the gap is also mitigated. [Explanation of symbols]

[0069] 1 Door frame 2 First door 23 Door end side (first section) 210 Projection piece 3 Second door 16 Convex part 34 Front of the house (second section) 340 First inclined surface (inclined portion, first inclined portion, finger pinching impact mitigation means) 341 Second inclined surface (inclined portion, second inclined portion, finger pinching impact mitigation means) 163 Inclined surface (inclined portion, third inclined portion, finger pinching impact mitigation means) 341´ Inclined surface (inclined portion, finger pinching impact mitigation means) 163´ Inclined surface (inclined portion, finger pinching impact mitigation means) 6 Latch lock (connection means element) 7 Electric strike (element of connecting means)

Claims

1. The door for opening and closing the opening portion is composed of a first door body and a second door body, The opening can be opened by rotating the first door body and the second door body together toward the first side from a fully closed position of the opening, In the fully closed position of the opening, a first portion extending in the height direction at the door end side of the first door body and a second portion extending in the height direction at the door end side of the second door body are close to each other and face each other, The first door is rotatable such that the first portion is separated toward a second side with respect to a second portion of the second door in a closed position, At least a portion of at least one of the first portion and the second portion is provided with a finger pinching shock absorbing means, The finger pinching impact mitigation means is an inclined portion extending from the second side toward the first side in a plan view, When the first portion of the first door body rotated relative to the second door body approaches the second portion, the inclined portion is located in a gap formed between the first portion and the second portion, The inclined portion includes at least two inclined portions extending in a stepped manner in a plan view. Door device.

2. The door for opening and closing the opening portion is composed of a first door body and a second door body, The opening can be opened by rotating the first door body and the second door body together toward the first side from a fully closed position of the opening, In the fully closed position of the opening, a first portion extending in the height direction at the door end side of the first door body and a second portion extending in the height direction at the door end side of the second door body are close to each other and face each other, The first door is rotatable such that the first portion is separated toward a second side with respect to a second portion of the second door in a closed position, At least a portion of at least one of the first portion and the second portion is provided with a finger pinching shock absorbing means, The finger pinching impact mitigation means is an inclined portion extending from the second side toward the first side in a plan view, When the first portion of the first door body rotated relative to the second door body approaches the second portion, the inclined portion is located in a gap formed between the first portion and the second portion, The inclined portion is formed in the second portion, the first portion comprises a trailing edge side projected surface and a protruding piece extending from a second side of the trailing edge side projected surface toward the trailing edge side, and when the first door body and the second door body are integrated, a tip of the protruding piece is adjacent to a second side portion of the inclined portion, and a first side portion of the trailing edge side projected surface is adjacent to the first side portion of the inclined portion, When the first portion of the first door body rotated relative to the second door body approaches the second portion, the inclined portion faces the first side portion of the first portion. Door device.

3. The door for opening and closing the opening portion is composed of a first door body and a second door body, The opening can be opened by rotating the first door body and the second door body together toward the first side from a fully closed position of the opening, In the fully closed position of the opening, a first portion extending in the height direction at the door end side of the first door body and a second portion extending in the height direction at the door end side of the second door body are close to each other and face each other, The first door is rotatable such that the first portion is separated toward a second side with respect to a second portion of the second door in a closed position, At least a portion of at least one of the first portion and the second portion is provided with a finger pinching shock absorbing means, The finger pinching impact mitigation means is an inclined portion extending from the second side toward the first side in a plan view, When the first portion of the first door body rotated relative to the second door body approaches the second portion, the inclined portion is located in a gap formed between the first portion and the second portion, an intermediate portion in the inclination direction of the inclined portion forms a convex portion extending in a height direction, the inclined portion being formed of a first inclined portion on a first side, a second inclined portion on a second side, and a third inclined portion formed on the convex portion; Door device.

4. The door for opening and closing the opening portion is composed of a first door body and a second door body, The opening can be opened by rotating the first door body and the second door body together toward the first side from a fully closed position of the opening, In the fully closed position of the opening, a first portion extending in the height direction at the door end side of the first door body and a second portion extending in the height direction at the door end side of the second door body are close to each other and face each other, The first door is rotatable such that the first portion is separated toward a second side with respect to a second portion of the second door in a closed position, At least a portion of at least one of the first portion and the second portion is provided with a finger pinching shock absorbing means, The finger pinching impact mitigation means is an inclined portion extending from the second side toward the first side in a plan view, When the first portion of the first door body rotated relative to the second door body approaches the second portion, the inclined portion is located in a gap formed between the first portion and the second portion, The inclined portion is formed in a portion including a central portion in a height direction of at least one of the first portion and the second portion, The first door body and the second door body are integrated by a connecting means to form a door body, and when the connecting means is released, only the first door body can rotate, The elements of the connecting means are provided at a portion other than the inclined portion. Door device.

5. The element of the connecting means is provided at an upper end portion of at least one of the first portion and the second portion. The door device according to claim 4.

Images