sliding door

Abstract

To prevent a gap which is disadvantageous from a fire prevention standpoint from being formed on a door end side of a door body of a sliding door when the door body is in a fully closed position.SOLUTION: In a sliding door having a door body which opens and closes an opening by a suspension wheel unit 8 running on a rail 7, and in which a door end side portion of a door body 6 is retracted into a recess 11 when the opening is fully closed, the suspension wheel unit 8 comprises at least one roller 80 and a door body lowering amount restriction portion 9. In a normal state where the roller 80 contacts with the rail 70, the door body lowering amount restriction portion 9 is located at a predetermined distance D upward from a part of the rail member 7. When the roller 70 melts or deforms due to heat from the fire and the door body 6 is lowered by a predetermined distance, the door body lowering amount restriction portion 9 contacts the part of the rail member 7 to restrict the door body 6 from being lowered and to restrict the door body 6 from tilting excessively when the opening is fully closed, thus preventing a gap from being formed on the door end side of the door body 6 in a front view.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a sliding door, and more particularly to a sliding door having fire prevention capabilities. [Background technology]

[0002] A sliding door, typically an automatic door, slides left and right as the rollers of the left and right hanging wheel units installed at the upper end of the door body run on rails to open and close the opening. In order to reduce noise when the door body runs, plastic rollers are often used, but when the opening is fully closed, if the resin of the rollers melts due to the heat of a fire or the like, the height of the plastic rollers will decrease and the door body will drop. At this time, depending on the manner in which the plastic rollers melt (for example, if the height of the plastic roller of the hanging wheel unit on the door end side becomes lower than the height of the plastic roller of the hanging wheel unit on the door tail side), the door body in the fully closed position may tilt and a gap may occur on the door end side of the door body (for example, at the lower end of the door end side). If a gap occurs on the door end side of the door body in the fully closed position, a penetration part will be formed between the indoor and outdoor spaces partitioned by the door body, and the performance as a fire prevention facility will not be maintained.

[0003] In order to prevent the door body from sagging in the event of a fire, it is possible to use steel rollers for the hoist unit, but this makes it difficult to ensure quiet operation during normal opening and closing.

[0004] Patent Documents 1 and 2 describe fall-off prevention means for preventing rollers from falling off the rails in a sliding door. These documents prevent the rollers from falling off the rails, thereby preventing the door body from moving out of its normal position. [Patent Document 1] Patent No. 3084619 [Patent Document 2] Patent No. 4105330 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] An object of the present invention is to prevent the formation of a gap, which is disadvantageous in terms of fire prevention, on the door end side of a sliding door when the door body is in a fully closed position. [Means for solving the problem]

[0006] The technical means adopted in the present invention is a sliding door that has a door body that opens and closes an opening by running a hoist unit provided at the upper end on a rail, and when the opening is fully closed, the door end side portion of the door body is stored so as to form a swallowing portion in the height direction. The hoist unit includes at least one roller and a door body lowering amount regulating portion, In a normal state in which the roller is in contact with the rail, the door body lowering amount regulating portion is located a predetermined distance above the immovable member, When the roller melts or deforms due to heat during a fire and the door body lowers by a predetermined distance, the door body lowering amount regulating portion abuts against the portion of the immovable member, thereby regulating the lowering of the door body, This sliding door maintains the intake section throughout the height direction by regulating the sagging of the door body and regulating excessive inclination of the door body when the opening is fully closed, thereby preventing the formation of a gap on the door tip side of the door body when viewed from the front. In one aspect, the swallowing portion is formed by forming a recess in either the door-front portion of the door body or the portion into which the door-front portion fits when the opening is fully closed (for example, the vertical frame of a sliding door frame or the door-front vertical frame of a sliding door frame), and the other portion fitting into the recess. In one embodiment, when the opening is fully closed, the swallowing portion is formed by fitting the door end portion of the door body into the recess over the entire height direction, The door body sagging amount regulating portion abuts against the portion of the immovable member to regulate the sagging of the door body, and the door-end side portion of the door body is contained within the recess throughout the height direction, thereby maintaining the swallowing portion. In one embodiment, a recess is formed in the door end portion of the door body in the height direction, and when the opening is fully closed, a protrusion (for example, provided on a vertical frame of a sliding door frame or a vertical frame on the door end side of a sliding door) fits into the recess of the door body in the height direction to form the swallowing portion, The door body lowering amount regulating portion abuts against the portion of the immovable member to regulate the lowering of the door body, and the convex portion fits within the concave portion of the door body throughout the height direction, thereby maintaining the swallowing portion.

[0007] In a typical embodiment, the sliding door is an automatic door. In a typical embodiment, the roller is made of resin. In a typical embodiment, the door lowering amount regulating portion is made of metal (for example, steel). The above-mentioned "excessive inclination" means an inclination that creates a gap on the door edge side of the door body when viewed from the front. More specifically, the swallowing dimension at the swallowing portion is L (for example, when the opening is fully closed, the leading edge portion of the door body is contained within the recess by swallowing dimension L), and the door body lowering amount regulating portion is located a distance D above the immovable member. Here, distance D is the maximum amount of lowering of the door body. The swallowing dimension L and distance D are set to dimensions such that even when the door body is at its maximum inclination due to lowering, the swallowing portion is maintained throughout the height direction (the leading edge portion of the door body is contained within the recess throughout the height direction) and no gap is formed when viewed from the front. When a door body having a height dimension C and a first hoist unit and a second hoist unit spaced apart by a distance A in the door width direction constitutes a single-sliding door, the maximum drop amount of the door body is D, and the swallowing dimension L is set to satisfy L > (C / A) × D. The dimension (C / A) x D represents the horizontal movement of the lower or upper end of the door body at its maximum inclination (specifically, when only one of the first and second hoist unit is lowered to its maximum extent). As is clear from the formula L>(C / A)×D, the swallowing dimension L can be made small by setting the distance D to a small value.

[0008] A component member of the sliding door (for example, a rail member forming the rail) may also serve as the immovable member. In one embodiment, the immovable member is a rail member that forms or supports the rail. That is, when the roller is melted or deformed, the door body lowering amount regulating portion comes into contact with a portion of the rail member. The portion of the rail member may be the rail. The immovable member may be, for example, a member prepared separately from the rail member and fixed to the rail member, or an immovable member supported by the upper case.

[0009] In one embodiment, the hoist unit includes a first hoist unit located on the door end side of the door body and a second hoist unit located on the door tail side of the door body, The door body lowering amount regulating portion is provided on either or both of the first hoist unit and the second hoist unit. In an embodiment described later, both the first hoist unit and the second hoist unit are provided with the door body lowering amount regulating portion. Depending on the conditions of the installation location of the sliding door, the door body sagging amount regulating portion may be provided only on one of the hanging wheel units. For example, when it is sufficient to regulate the sagging amount of the door body only on the door end side, the door body sagging amount regulating portion may be provided only on the hanging wheel unit on the door end side.

[0010] In one embodiment, the hoist unit has two rollers spaced apart in the opening width direction, an arm that rotatably supports the two rollers is supported at a midpoint in the longitudinal direction so as to be freely rotatable in the vertical direction, and the door body lowering amount regulating section is provided at a midpoint in the longitudinal direction of the arm. The above "vertical rotation" means that when one end of the arm moves up and down, the other end moves up and down. In one embodiment, the door body lowering amount regulating portion is fixed to the arm by utilizing a rotation axis of the arm, and rotates (swings) together with the rotation (swing) of the arm.

[0011] In one embodiment, the swallowing portion is formed by the door-front side portion of the door body and a vertical frame that constitutes a sliding door frame. In one embodiment, the recess is provided in a vertical frame that constitutes a sliding door frame. The recess may be a separate piece of material fixed to the projecting surface of the vertical frame, or it may be formed integrally with the vertical frame by providing a recess in the projecting surface of the vertical frame itself.

[0012] The sliding door is a separate sliding door consisting of a first door body and a second door body, A recess is provided in a door end portion of the second door body, and when the opening is fully closed, the door end portion of the first door body is accommodated in the recess over the height direction to form the swallowing portion, The door body sagging amount regulating portion abuts against the portion of the immovable member to regulate the sagging of the first door body and / or the second door body, and the door-end side portion of the first door body is contained within the recess throughout the height direction, thereby maintaining the swallowing portion. The recess may be a separate piece from the leading edge portion of the second door body and fixed to the leading edge portion of the second door body, or a recess may be provided in the leading edge portion of the second door body itself and formed integrally with the leading edge portion of the second door body. When the first and second door bodies constituting a sliding door have a height dimension C and are equipped with a first and a second hoist unit spaced apart by a distance A in the door width direction, and the maximum drop amount of the first and second door bodies is D, the swallowing dimension L is set to satisfy L > (C / A) × D × 2. The dimension (C / A) x D x 2 represents the horizontal separation between the lower ends or upper ends of the first and second door bodies when the door bodies are at their maximum inclination (specifically, when the first and second door bodies are most inclined in the direction in which their upper ends or lower ends move away from each other on the door leading sides). Effect of the Invention

[0013] In the present invention, in the event of a fire, the door body lowering amount regulating part regulates the amount of lowering of the door body to regulate excessive inclination of the door body when the opening is fully closed, thereby keeping the door end portion of the door body contained within the recess throughout the height direction and preventing the formation of a gap that is disadvantageous in terms of fire prevention on the door end side of the door body when viewed from the front. Therefore, the sliding door of the present invention maintains its performance as a fire prevention facility in the event of a fire. The door body sagging amount regulating section according to the present invention can be prepared as a simple component, for example, a metal plate of a specified shape and dimensions, and the door body sagging amount regulating section can be obtained by adding the above-mentioned metal plate to a normal hoist unit, thereby enabling the components of the hoist unit to be standardized. In the present invention, the door body lowering amount regulating portion limits the amount of lowering of the door body, thereby regulating excessive inclination of the door body when the opening is fully closed, and therefore the swallowing dimension of the door body's door-end side portion relative to the recess can be reduced, and therefore there is no need to increase the depth of the recess to ensure a large swallowing dimension. In the present invention, it is not prevented from making the recess deeper to ensure a sufficient swallowing dimension, but in cases where designing the recess deeper is not an option, it is useful to be able to reduce the swallowing dimension of the door body's door-end side portion relative to the recess. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a front view of a single sliding door according to the present embodiment (when the opening is fully closed), as viewed from the outdoor side. [Diagram 2] FIG. 2 is a cross-sectional view of the sliding door according to the present embodiment, with the upper side facing the outdoors and the lower side facing the indoors. [Diagram 3] FIG. 2 is a vertical cross-sectional view of the sliding door according to the present embodiment, with the left side facing the outdoors and the right side facing the indoors. [Figure 4] 4A and 4B are diagrams showing a driving mechanism for the sliding door according to the embodiment of the present invention. [Diagram 5] FIG. 2 is a diagram showing the upper end portion of the sliding door body and the hoist unit according to the present embodiment. [Figure 6]1A and 1B are diagrams showing a hoist unit of a sliding door according to this embodiment, in which the upper diagram is a front view seen from the outdoor side, the middle diagram is a plan view, and the lower diagram is a front view seen from the indoor side. [Figure 7] FIG. 2 is a front view of the separate sliding door according to the present embodiment (when the opening is fully closed), as viewed from the outdoor side. [Figure 8] FIG. 2 is a cross-sectional view of the sliding door according to the present embodiment, with the upper side facing the outdoors and the lower side facing the indoors. [Figure 9] 1 is a schematic diagram illustrating the relationship between the maximum amount of sagging of the door body and the swallowing dimension of the door leading portion of the door body. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a front view of a sliding door according to this embodiment (when the opening is fully closed) seen from the outdoor side, Fig. 2 is a cross-sectional view of the sliding door according to this embodiment, where the upper side is the outdoor side and the lower side is the indoor side, and Fig. 3 is a vertical cross-sectional view of the sliding door according to this embodiment, where the left side is the outdoor side and the right side is the indoor side. The sliding door according to this embodiment is an automatic door consisting of a top-hung sliding door.

[0016] The sliding door is provided with a sliding door frame formed of a leading edge vertical frame 1, a trailing edge vertical frame 2, an upper case 3, and a lower frame 4. A vertical rectangular fixed panel 5 is provided in the trailing edge half of the sliding door frame, and a building opening is formed in the leading edge half (between the leading edge vertical frame 1 of the sliding door frame and the leading edge vertical frame 50 of the fixed panel 5). The surface of the fixed panel 5 is formed of a glass panel G. In this embodiment, the leading edge vertical frame 1 and the trailing edge vertical frame 2 of the sliding door frame extend upward beyond the upper case 3, and the upper ends of the leading edge vertical frame 1 and the trailing edge vertical frame 2 are connected by an upper frame 3'. A glass panel G is fitted into the space between the upper frame 3' and the upper case 3.

[0017] The sliding door has a vertically rectangular door body 6, which slides left and right to open and close the building opening. The door body 6 has a leading edge vertical frame 60, a trailing edge vertical frame 61, an upper frame 62, and a lower frame 63. A glass panel G is fitted into the vertically rectangular area surrounded by the leading edge vertical frame 60, the trailing edge vertical frame 61, the upper frame 62, and the lower frame 63, and the glass panel G forms the surface.

[0018] The upper case 3 is a box-shaped body extending in the opening width direction as a whole, and a rail member 7 is provided in the internal space across substantially the entire width of the upper case 3, with a portion of the rail member 7 forming a rail 70 extending in the opening width direction. The rail member 7 is an elongated member having a predetermined width extending in the front-rear direction (indoor / outdoor direction) and a predetermined length extending in the opening width direction, and is a stationary member fixed inside the upper case 3. The rail member 7 according to this embodiment has a substantially L-shape in cross section formed by a horizontal side 71 and a vertical side 72.

[0019] More specifically, as shown in FIG. 5, the rail member 7 includes a horizontal side 71 on which a rail 70 is formed at one end in the front-rear direction, and a vertical side 72 rising from the other end in the front-rear direction of the horizontal side 71. In this embodiment, the vertical side 72 of the rail member 7 is located inside the outdoor facing surface 30 of the upper case 3, the outdoor side portion of the horizontal side 71 is integrally formed at the lower end of the vertical side 72, and the rail 70 is integrally formed at the indoor side end of the horizontal side 71. The horizontal side 71 according to this embodiment is composed of a first portion 710 on which the rail 70 is formed and a second portion 711 on the lower end side of the vertical side 72, and the first portion 710 is located higher than the second portion 711. The rail member 7 shown in FIG. 5 is an example, and the shape of the rail member 7 is not limited to the one shown in the figure. For example, in the illustrated embodiment, the rail 70 is integrally formed with the rail member 7, but the rail may be prepared as a separate member and supported by the rail member. In the illustrated embodiment, the rails 70 are convex, but for example, a groove-like rail may be formed from a concave.

[0020] A hoisting wheel unit 8 is provided on the upper end of the door body 6, i.e., on the upper surface of the upper frame 62. In this embodiment, the hoisting wheel unit 8 is composed of a first hoisting wheel unit (end-side hoisting wheel unit) 8A provided at a position closer to the end of the upper end of the door body 6, and a second hoisting wheel unit (end-side hoisting wheel unit) 8B provided at a position closer to the trailing edge of the upper end of the door body 6 (see FIG. 4). In this specification, the first hoisting wheel unit 8A and the second hoisting wheel unit 8B are represented by the hoisting wheel unit 8, and the terms first hoisting wheel unit 8A and second hoisting wheel unit 8B are used when distinguishing and describing the two hoisting wheel units.

[0021] The hoisting wheel unit 8 includes two resin rollers 80 spaced apart in the opening width direction (the width direction of the door body 6 or the length direction of the rail member 7), and the two resin rollers 80 are rotatably supported by an arm 81 extending in the opening width direction (the width direction of the door body 6 or the length direction of the rail member 7). One of the resin rollers 80 is rotatably supported at one end of the arm 81, and the other resin roller 80 is rotatably supported at the other end of the arm 81, and the arm 81 is rotatably supported by a support part 82 at the midpoint between the two support parts. The hoisting wheel unit 8 further includes an L-shaped base in a side view, which is composed of a vertical base 83 and a horizontal base 84 integrally formed at the lower end of the vertical base 83, and the support part 82 on which the arm 81 is rotatably supported is fixed to the vertical base 83. The hoisting wheel unit 8 is fixed to the upper end of the door body 6 via the horizontal base 84.

[0022] The door body 6 is capable of sliding in the opening width direction (left and right direction) by the plastic rollers 80 of the hoist unit 8 rolling on the rails 70 of the rail member 7. As shown in Fig. 3, an anti-sway protrusion 630 is formed on the lower end of the door body 6, i.e., the lower surface of the lower frame 63, and when the door body 6 slides, the anti-sway protrusion 630 at the lower end moves along the guide groove 40 formed in the lower frame 4.

[0023] The arm 81 is supported so as to be rotatable up and down around the midpoint in the length direction as a rotation fulcrum. More specifically, the arm 81 is rotatable (swingable) so that when one end of the arm 81 moves up and down, the other end moves up and down. When the door body 6 is moving, the end in the length direction of the arm 81 (i.e., the resin roller 80) can move slightly up and down as needed, allowing the door body 6 to slide smoothly.

[0024] The horizontal base 84 of the hoisting wheel unit 8 is provided with a sliding contact portion 85 having good sliding properties, located below the intermediate portion in the longitudinal direction of the arm 81 (the pivot point of the arm). The sliding contact portion 85 according to this embodiment is made of resin, and is supported by a support portion 850 fixed to the vertical base 83 of the base. In the hoisting wheel unit 8, the sliding contact portion 85 is close to the lower surface of the rail 70 of the rail member 7, and in combination with the two resin rollers 80 contacting the upper surface of the rail 70, prevents the resin rollers 80 of the hoisting wheel unit 8 from coming off the rail 70. All of the components of the hoisting wheel unit 8 according to this embodiment, except for the resin rollers 80 and the sliding contact portion 85, are made of metal (steel).

[0025] The sliding door according to this embodiment is an automatic door, and a drive mechanism is provided in the upper case 3 of the sliding door frame. The drive mechanism includes a motor 32, a drive sprocket 33, a driven sprocket 34, and a timing belt 35 wound around the drive sprocket 33 and the driven sprocket 34, and moves the hoist unit 8 on the rail 70 as the timing belt 35 moves. For example, one of the first hoist unit 8A and the second hoist unit 8B is the drive hoist unit, and the other is the driven hoist unit. The drive mechanism of an automatic door is well known, so further detailed description is omitted. The indoor facing surface 31 of the upper case 3 forms an inspection cover, and by removing the inspection cover, the internal space of the upper case 3 is exposed, making it possible to perform maintenance on the drive mechanism.

[0026] An activation sensor S1 is provided on the outdoor facing surface 30 and the indoor facing surface 31 of the upper case 3, located above the building opening, and when the activation sensor S1 detects a person positioned in front of the building opening, the motor 30 is driven to open the door body 6, which is in the fully closed position. A touch sensor S2 is provided on the outdoor facing surface 600 and the indoor facing surface 601 of the door end vertical frame 60 of the door body 6, and when the touch sensor S2 is touched, the motor 30 is driven to open the door body 6, which is in the fully closed position. Either the activation sensor S1 or the touch sensor S2 can be used depending on the installation location of the automatic door, etc.

[0027] The hoist unit 8 has a door body lowering amount regulating portion 9. The door body lowering amount regulating portion 9 according to this embodiment is made of a metal plate. More specifically, as shown in FIG. 6, the door body lowering amount regulating portion 9 is a metal plate having a substantially rectangular shape, and the lower end edge is a curved edge 90 that bulges downward. The door body lowering amount regulating portion 9 is attached to the arm 81 by fixing the widthwise center portion to the rotation shaft portion 810 of the arm 81. The lowest point of the curved edge 90 of the door body lowering amount regulating portion 9 is located directly below the rotation fulcrum of the arm 81. As shown in the center diagram of FIG. 6, the longitudinal center portion of the arm 81 is concave, and the door body lowering amount regulating portion 9 made of a metal plate is attached to this concave portion. As shown in Figure 5, the door body lowering amount regulating section 9 in this embodiment is provided in the hoist unit 8 at a position offset from the resin roller 80 (in this embodiment, offset toward the outdoors), so that when the door body 6 is lowered, it does not abut against the rail 70, but rather abuts against the part of the rail member 7 that supports the rail 70 (specifically, the first part 710 of the horizontal edge 71).

[0028] During normal opening / closing and fully closing of the door body 6, specifically, when the plastic roller 80 of the hoist unit 8 is placed on the rail 70, the lowest point of the curved edge 90 of the door body lowering amount regulating portion 9 is spaced a distance D from the upper surface of the first portion 710 of the horizontal side 71 of the rail member 7. Since the lower end of the curved edge 90 of the door body lowering amount regulating portion 9 of the hoist unit 8 is spaced a distance D from the upper surface of the first portion 710 of the horizontal side 71 of the rail member 7, when the plastic roller 80 of the hoist unit 8 of the door body 6 runs on the rail 70, the door body lowering amount regulating portion 9 does not come into contact with the rail member 7. The door body lowering amount regulating portion 9 is fixed to the arm 81 and rotates (swings) integrally with the arm 81, but the lowest point of the curved edge 90 of the door body lowering amount regulating portion 9 is located directly below the pivot point of the arm 81, so the height position of the lowest point of the curved edge 90 of the door body lowering amount regulating portion 9 is constant, and the door body lowering amount regulating portion 9 does not come into contact with the rail member 7 regardless of the posture of the arm 81 (door body lowering amount regulating portion 9) when the door body 6 is traveling or when it is fully closed and stopped. The hoist unit 8 according to this embodiment can be obtained by adding the door lowering amount regulating portion 9 made of a metal plate to a normal hoist unit, and the parts of the hoist unit can be shared. The door body lowering amount regulating portion 9 is not limited to a metal plate, and the shape, etc. are not limited as long as it has an abutting portion that abuts against a non-moving member such as the rail member 7.

[0029] When the opening is fully closed, if the resin roller 80 of the hoist unit 8 melts or deforms due to heat during a fire, the height dimension of the resin roller 80 may decrease. At this time, the door body 6 will be lowered by the amount of the decrease in the height of the resin roller 80, but when the door body 6 is lowered by a distance D in the vertical direction, the lowest point of the curved edge 90 of the door body lowering amount regulating portion 9 abuts on the upper surface of the first portion 710 of the horizontal side 71 of the rail member 7, thereby restricting the amount of lowering of the door body 6. In other words, the distance D defines the maximum amount of lowering of the door body 6.

[0030] The sliding door according to this embodiment can be used as a fire prevention facility, and when the opening is fully closed, no gaps penetrating from the inside to the outside are formed on the leading edge and trailing edge sides of the door body 6. On the trailing edge side of the door body 6, the trailing edge side vertical frame 61 of the door body 6 overlaps with the leading edge side vertical frame 50 of the fixed panel 5, and a clash structure is formed between the first side 61a formed on the trailing edge side vertical frame 61 and the second side 50a formed on the leading edge side vertical frame 50.

[0031] At the door end side of the door body 6, the door end side portion of the door body 6 (the door end side portion of the door end vertical frame 60) fits into a recess 11 formed in the door end vertical frame 1 of the sliding door frame to form a swallowing portion. In this embodiment, the recess is formed by a member 11' that is concave in cross section and provided in the height direction on the projected surface 10 of the door end vertical frame 1 of the sliding door frame, as shown in Fig. 2. The member 11' has a concave shape in cross section formed by an outdoor side edge 110', an indoor side edge 111', and a bottom edge 112', and the bottom edge 112' is fixed to the projected surface of the door end vertical frame 1, and the recess 11 is formed by the area surrounded by the outdoor side edge, the indoor side edge, and the bottom edge. A convex portion 602 is formed along the height direction on the end face of the leading edge vertical frame 60 of the door body 6, and when the opening is fully closed, the convex portion 602 of the leading edge vertical frame 60 of the door body 6 is fitted into a recess 11 formed on the projected surface 10 of the leading edge vertical frame 1 with a swallowing dimension L.

[0032] When the opening is fully closed, if the plastic rollers 80 melt or deform due to heat during a fire and the door body 6 lowers, when the door body 6 has lowered by the distance D, the door body lowering amount regulating portion 9 comes into contact with the upper surface of the first portion 710 of the horizontal side 71 of the rail member 7, thereby restricting the door body 6 from lowering further. Here, if there is a difference in the degree of melting or deformation of the plastic rollers 80 of the first hoist unit 8A and the second hoist unit 8B, there will be a difference in height between the leading edge and trailing edge of the door body 6 in the fully closed position, which may cause the door body 6 to tilt.

[0033] In this embodiment, by regulating the amount of sagging of the door body 6 using the door body sagging amount regulating section 9, even if there is a difference in height between the door tip side and the door tail side of the door body 6 in the fully closed position, excessive tilt of the door body 6 when the opening is fully closed (tilt that would form a gap on the door tip side of the door body 6 when viewed from the front) can be regulated, and the convex portion 602 on the door tip side of the door body 6 remains contained within the recess 11 throughout the height direction, preventing the formation of a gap penetrating from indoors to outdoors on the door tip side of the door body 6 when viewed from the front.

[0034] Specifically, when the opening is fully closed, the protrusion 602 of the door body 6 at the door end side portion is accommodated in the recess 11 with a swallowing dimension L, and the door body lowering amount regulating portion 9 is located at a distance D above the upper surface of the first portion 710 of the horizontal side 71 of the rail member 7. Here, the distance D is the maximum amount of lowering of the door body. The swallowing dimension L and the distance D are set to dimensions such that even when the door body 6 is at its maximum inclination due to the door body 6 lowering, the protrusion 602 of the door end side portion of the door body 6 is accommodated in the recess 11 over the entire height direction, and no gap is formed in the front view. In practice, the swallowing dimension L can be reduced by setting the distance D to a small value. By limiting the amount of lowering of the door body 6 in the fully closed position, the swallowing dimension L of the door end side portion (protrusion 602) of the door body 6 relative to the recess 11 can be reduced, and therefore it is not necessary to increase the depth dimension of the recess 11. The recess 11 may have a sufficient depth, but when it is difficult to design the recess 11 deep, it is useful to be able to reduce the swallowing dimension of the door body 6's door-end side portion relative to the recess 11. In this embodiment, the swallowing portion is formed by fitting the door-end side end of the door body 5 into the recess of the door-end side vertical frame 1 of the sliding door frame when the opening is fully closed, but a recess or recessed groove may be formed in the door-end side end face of the door body 5 along the height direction, and a protrusion may be formed in the projected face of the door-end side vertical frame 1 of the sliding door frame along the height direction, so that the swallowing portion is formed by fitting the protrusion of the door-end side vertical frame 1 of the sliding door frame into the recess of the door-end side end of the door body 5 when the opening is fully closed.

[0035] Another embodiment of the present invention will be described with reference to Fig. 7 and Fig. 8. Fig. 7 is a front view of a sliding door according to this embodiment (when the opening is fully closed) seen from the outdoor side, and Fig. 2 is a cross-sectional view of the sliding door according to this embodiment, with the upper side facing the outdoor side and the lower side facing the indoor side. The sliding door according to this embodiment is an automatic door consisting of a top-hung type split sliding door.

[0036] The sliding door is provided with a sliding door frame formed of a first vertical frame 1', a second vertical frame 2', an upper case 3, and a lower frame 4. A first fixed panel 5A and a second fixed panel 5B are provided on both sides of the width direction of the sliding door frame, and a building opening is formed between the door end side vertical frame 50A of the first fixed panel 5A and the door end side vertical frame 50B of the second fixed panel 5B. The surfaces of the first fixed panel 5A and the second fixed panel 5B are formed of glass panels G. In this embodiment, the door end side vertical frame 1' and the door end side vertical frame 2' of the sliding door frame extend upward beyond the upper case 3, and the upper ends of the door end side vertical frame 1' and the door end side vertical frame 2' are connected by the upper frame 3'. A glass panel G is fitted into the space between the upper frame 3' and the upper case 3.

[0037] The sliding door is equipped with a first door body 6A and a second door body 6B, which are vertically rectangular, and the first door body 6A and the second door body 6B slide to open and close the building opening. The first door body 6A is equipped with a door-end vertical frame 60A, a door-end vertical frame 61A, an upper frame 62A, and a lower frame 63A, and a glass panel G is fitted into the vertically rectangular area surrounded by the door-end vertical frame 60A, the door-end vertical frame 61A, the upper frame 62A, and the lower frame 63A, and the glass panel G forms a surface portion. The second door body 6B comprises a leading edge vertical frame 60B, a trailing edge vertical frame 61B, an upper frame 62B, and a lower frame 63B, and a glass panel G is fitted into the vertical rectangular area surrounded by the leading edge vertical frame 60B, the trailing edge vertical frame 61B, the upper frame 62B, and the lower frame 63B, and the glass panel G forms the surface portion.

[0038] An activation sensor S1 is provided on the exterior side facing surface 30 and the interior side facing surface 31 of the upper case 3, located above the building opening. When the activation sensor S1 detects a person in front of the building opening, the motor 30 is driven to open the first door body 6A and the second door body 6B, which are in the fully closed position, by pulling them apart. A touch sensor S2 is provided on the facing surface of the vertical frames 60A and 60B on the door end side of the door body 6 of the first door body 6A and the second door body 6B. When the touch sensor S2 is touched, the motor 30 is driven to open the first door body 6A and the second door body B, which are in the fully closed position. When either of the touch sensors S2 is touched, both the first door body 6A and the second door body B are pulled apart and opened. Either the activation sensor S1 or the touch sensor S2 may be used depending on the installation location of the automatic door, etc.

[0039] The first door body 6A and the second door body 6B are equipped with a hoist unit 8 equipped with a door body lowering amount regulating portion 9, and the above description can be used for the configuration of the rail member 7 and the hoist unit 8 equipped with the door body lowering amount regulating portion 9. In addition, the automatic door itself consisting of a pull-out type and top-hung sliding door is well known, so a description of the drive mechanism will be omitted.

[0040] The sliding door according to this embodiment can be used as a fire prevention facility, and when the opening is fully closed, no gap is formed on the leading edge and trailing edge of the first door body 6A and the second door body 6B that penetrate the interior side. On the trailing edge of the first door body 6A, the trailing edge vertical frame 61A of the first door body 6A overlaps with the leading edge vertical frame 50A of the fixed panel 5A, and a gap between the trailing edge vertical frame 61A and the leading edge vertical frame 50A is formed with a hook structure (see Fig. 2 and Fig. 8). On the trailing edge of the second door body 6B, the trailing edge vertical frame 61B of the second door body 6B overlaps with the leading edge vertical frame 50B of the fixed panel 5B, and a hook structure (see Fig. 2 and Fig. 8) is formed between the trailing edge vertical frame 61B and the leading edge vertical frame 50B.

[0041] In this embodiment, as shown in Fig. 8, a joint is formed from the door-end side portion of the first door body 6A and the door-end side portion of the second door body 6B, and the joint is a swallowing portion. More specifically, a convex portion 600A is formed in the door-end side vertical frame 60A of the first door body 6A along the height direction, and a concave portion 600B is formed in the door-end side vertical frame 60B of the second door body 6B along the height direction, and when the opening is fully closed, the convex portion 602 of the door-end side vertical frame 60A of the first door body 6A is accommodated in the concave portion 600B formed in the door-end side vertical frame 60B of the second door body 6B with a swallowing dimension L.

[0042] In this embodiment, the door body lowering amount regulating unit 9 regulates the lowering amount of the first door body 6A and the second door body 6B. This prevents excessive inclination of the first door body 6A and / or the second door body 6B when the opening is fully closed (when viewed from the front, the first door body 6A is lowered) even when there is a difference in height between the leading edge side and the trailing edge side of the first door body 6A in the fully closed position and / or when there is a difference in height between the leading edge side and the trailing edge side of the second door body 6B in the fully closed position. This can regulate the inclination (angle at which a gap would be formed) at the joint formed by the convex portion 600A of the first door body 6A and the concave portion 600B of the second door body 6B, thereby maintaining the convex portion 600A of the door-end side portion of the first door body 6A contained within the concave portion 600B of the door-end side portion of the second door body 6B over the entire height direction, and prevents the formation of a gap penetrating from indoors to outdoors at the joint formed by the convex portion 600A of the first door body 6A and the concave portion 600B of the second door body 6B when viewed from the front.

[0043] FIG. 9 is a schematic diagram for explaining the relationship between the maximum lowering amount of the door body and the swallowing dimension of the door body at the door edge side. In FIG. 9, the distance between the first and second hoisting wheel units is A, the distance from the first hoisting wheel unit on the door edge side to the door edge side edge of the door body is B, the height dimension of the door body is C, the maximum lowering amount of the door body is D, and the movement width of the lower end of the door body at the maximum inclination of the door body is S. In this embodiment (the single-sliding type sliding door shown in FIG. 1 to FIG. 4 and the double-sliding type sliding door shown in FIG. 7 and FIG. 8), both the first and second hoisting wheel units are provided with two rollers, and the distance A between the first and second hoisting wheel units can be, for example, the distance between the rotation center of the arm of the first hoisting wheel unit and the rotation center of the arm of the second hoisting wheel unit.

[0044] (A) In the left diagram of FIG. 9, the movement width S is S=X+Y as shown in equation (1). (a) In the right diagram of Figure 9, if the distance between points α and β is E, then X = (A + B) - E, as shown in equation (2). (c) In the right diagram of Figure 9, if we consider a right triangle with hypotenuse A+B, short side {(A+B) / A}×D, and long side E, the spacing E can be expressed as in equation (3). (e) From the two right-angled triangles in the left diagram of Figure 9, Y = (C / A) × D, as shown in equation (4). (O) When D is sufficiently small relative to A+B, X can be considered to be X≒0, and in fact, D is sufficiently small relative to A+B. (f) Therefore, as shown in equation (5), S ≒ (C / A) × D.

[0045] For example, if the distance A between the first and second hoist unit is 750mm, the distance B from the first hoist unit on the door edge side to the door edge of the door body is 150mm, the height of the door body is C = 2000mm, and the maximum drop amount of the door body is D = 5mm, then X = 0.02mm, Y = 13.33mm, and the movement width of the bottom end of the door body is S = 13.35mm. If we consider X ≒ 0, then the movement width of the bottom end of the door body is S ≒ 13.33mm. If the maximum drop amount of the door body is D = 2mm, then X ≒ 0, Y = 5.33mm, and the movement width of the bottom end of the door body is S ≒ 5.33mm.

[0046] The swallowing dimension L and maximum lowering amount D are set to dimensions such that the swallowing portion is maintained throughout the height direction (for example, the leading edge portion of the door body is contained within the recess throughout the height direction) even when the door body is at its maximum inclination due to being lowered.

[0047] In the case of a single-sliding door, the case where the door body is most inclined as shown in the left diagram of FIG. 9 is when the first hoist unit on the door end side is lowered by D and the height of the second hoist unit on the door tail side does not change. In the opposite case, specifically, when the second hoist unit on the door tail side is lowered by D and the height of the first hoist unit on the door end side does not change, the inclination angle (although the direction is different) is substantially the same. When a single-sliding door is constituted by a door body having a height dimension C and a first hoist unit and a second hoist unit spaced apart by an interval A in the door width direction, the swallow dimension L is set to satisfy L>(C / A)×D. Therefore, in the case of a single-sliding door, if D and L are designed to satisfy L>S≒(C / A)×D, even when the door body is at its maximum inclination due to the door body being lowered, the door end side part of the door body is contained within the recessed portion throughout the height direction, and no gap is formed when viewed from the front. In the above example, when D=2mm, L>5.33mm.

[0048] For a sliding door, it is necessary to consider the case where the first door body and the second door body are inclined the most in the opposite direction. Specifically, it is necessary to consider the combination of the case where the first hoist unit on the door end side of the first door body is lowered by D and the height of the second hoist unit on the door end side does not change, and the case where the first hoist unit on the door end side of the second door body is lowered by D and the height of the second hoist unit on the door end side does not change. The same applies to the combination of the case where the second hoist unit on the door end side of the first door body is lowered by D and the height of the first hoist unit on the door end side does not change, and the case where the second hoist unit on the door end side of the second door body is lowered by D and the height of the first hoist unit on the door end side does not change. Therefore, it is necessary to consider the case where the lower ends (or upper ends) of the first and second door bodies are moved by S so that they are separated from each other. When configuring the first and second door bodies with height dimension C and the first and second hoist unit spaced apart by distance A in the door width direction, the swallow dimension L is set to satisfy L>(C / A)×D×2. Therefore, in the case of a sliding door, if D and L are designed to satisfy L>2S≒(C / A)×D×2, no gap will be formed in the front view at the joint formed by the door edge side part of the first door body and the door edge side part of the second door body. In the above example, when D=2mm, L>10.66mm.

[0049] Although the above embodiment relates to an automatic door, the present invention can also be applied to a manual sliding door. In the above embodiment, a single sliding door with one door body 6 is shown, but the present invention can also be applied to a so-called double single sliding door. In the above embodiment, a bifurcated sliding door with two door bodies 6A, 6B is shown, but the present invention can also be applied to a so-called double bifurcated sliding door. [Note] [Concept 1] A sliding door having a door body that opens and closes an opening by running a hoist unit provided at an upper end on a rail, and when the opening is fully closed, a door end portion of the door body is stored so as to form a swallow portion in the height direction. The swallowing portion is formed by fitting the leading edge portion of the door body into a recess formed in the leading edge vertical frame in the height direction, or fitting a protrusion formed in the leading edge vertical frame into a recess formed in the leading edge portion of the door body in the height direction, The hoist unit includes at least one roller and a door body lowering amount regulating portion, In a normal state in which the roller is in contact with the rail, the door body lowering amount regulating portion is located a predetermined distance above the immovable member, When the roller melts or deforms due to heat during a fire and the door body lowers by a predetermined distance, the door body lowering amount regulating portion abuts against the portion of the immovable member, thereby regulating the lowering of the door body, The door body sagging amount regulating portion forms a door body inclination regulating means that regulates the amount of sagging of the door body and regulates excessive inclination of the door body when the opening is fully closed, thereby maintaining the swallowing portion in the height direction and preventing the formation of a gap on the door tip side of the door body when viewed from the front. sliding door. [Concept 2] The door lowering amount regulating portion is an element other than the roller, The sliding door according to concept 1, wherein the immovable member is a rail member that forms or supports the rail. [Concept 3] The hoist unit includes a first hoist unit located on the door tip side of the door body and a second hoist unit located on the door tail side of the door body, The door body lowering amount regulating portion is provided in either one or both of the first hoist unit and the second hoist unit. A sliding door as described in any one of concepts 1 and 2. [Concept 4] The hoist unit has two rollers spaced apart in the opening width direction, and an arm that rotatably supports the two rollers is supported at a longitudinal center portion so as to be rotatable in the vertical direction, and the door body lowering amount regulating portion is provided at a longitudinal center portion of the arm. A sliding door according to any one of concepts 1 to 3. [Concept 5] When the opening is fully closed, if the door end side portion or the protrusion of the door body is contained within the recess with the swallowing dimension L, the door body lowering amount regulating portion is located a distance D above the portion of the immovable member, In a door body having a height dimension C and a first hoist unit and a second hoist unit spaced apart by an interval A in the door width direction, the swallow dimension L and distance D are set to satisfy L>(C / A)×D. A sliding door according to any one of concepts 1 to 4. [Concept 6] The sliding door is a separate sliding door consisting of a first door body and a second door body, The swallowing portion is formed from the leading edge portion of the first door body and the leading edge portion of the second door body instead of being formed from the leading edge portion of the door body and the leading edge vertical frame, and is formed by fitting a protrusion formed in the leading edge portion of the first door body into a recess formed in the leading edge portion of the second door body over the height direction, When the opening is fully closed, the door end portion of the first door body is accommodated in the recess over the entire height direction to form the swallowing portion, The door body lowering amount regulating portion abuts against the portion of the immovable member to regulate the lowering of the first door body and / or the second door body, and the door end side portion of the first door body is contained within the recess in the height direction, thereby maintaining the swallowing portion. A sliding door according to any one of concepts 1 to 4. [Concept 7] When the opening is fully closed, if the protrusion formed on the door end side portion of the first door body is accommodated in the recess formed on the door end side portion of the second door body with a swallowing dimension L, and the door body lowering amount regulating portion of the first door body and the second door body are located a distance D above the portion of the immovable member, When the first door body and the second door body have a height dimension C and a first hoist unit and a second hoist unit spaced apart by a distance A in the door width direction, the swallowing dimension L and the distance D are set to satisfy L>(C / A)×D×2. 13. A sliding door as described in concept 6. [Explanation of symbols]

[0050] 1 Door end vertical frame 6 Door body 7 Rail parts 70 Rail 8 Hoist Unit 80 Plastic roller 81 Arm 9. Door body drop amount control section 90 curved edge D Maximum drop amount L Swallowing dimension

Claims

1. A sliding door having a door body that opens and closes an opening by running a hoist unit provided at an upper end on a rail, and when the opening is fully closed, a door end portion of the door body is stored so as to form a swallow portion in the height direction. The swallowing portion is formed by fitting the leading edge portion of the door body into a recess formed in the leading edge vertical frame in the height direction, or fitting a protrusion formed in the leading edge vertical frame into a recess formed in the leading edge portion of the door body in the height direction, The hoist unit comprises a hoist unit on the door end side including at least one roller, and a hoist unit on the door tail side including at least one roller, Either one or both of the hoist units are provided with a gate body lowering amount regulating portion, The door body lowering amount regulating portion is located a predetermined distance above the immovable member in a normal state in which the roller of the hoist unit equipped with the door body lowering amount regulating portion is in contact with the rail, and when the roller melts or deforms due to heat during a fire and the hoist unit lowers a predetermined distance, the roller abuts against the immovable member, thereby regulating the amount of lowering of the door body, The door body sagging amount regulating portion regulates the amount of sagging of the door body in the event of a fire, when there is a difference in height between the door tip side and the door tail side of the door body in the fully closed position, thereby regulating the excessive inclination of the door body when the opening is fully closed, thereby maintaining the swallowing portion throughout the height direction and preventing the formation of a gap on the door tip side of the door body when viewed from the front. sliding door.

2. The sliding door of claim 1 , wherein the portion of the stationary member is an element other than a rail on which a roller rests.

3. A sliding door as described in any one of claims 1 and 2, wherein the door body sagging amount regulating section is an element other than a roller.

4. The door body lowering amount regulating portion is provided on both the hanging wheel unit on the door end side and the hanging wheel unit on the door tail side. A sliding door according to any one of claims 1 to 3.

5. When the opening is fully closed, if the door end side portion or the protrusion of the door body is contained within the recess with a swallowing dimension L, the door body lowering amount regulating portion is located a distance D above the portion of the immovable member, In a door body having a height dimension C and a first hoist unit and a second hoist unit spaced apart by an interval A in the door width direction, the swallow dimension L and the distance D are set to satisfy L>(C / A)×D. A sliding door according to any one of claims 1 to 4.

6. The sliding door is a sliding door consisting of a first door body and a second door body, The swallowing portion is formed from the leading edge portion of the door body and the leading edge vertical frame, but is formed from the leading edge portion of the first door body and the leading edge portion of the second door body, and is formed by fitting a protrusion formed in the leading edge portion of the first door body into a recess formed in the leading edge portion of the second door body over the height direction, When the opening is fully closed, the door end portion of the first door body is accommodated in the recess over the height direction to form the swallowing portion, The door body lowering amount regulating portion abuts against the portion of the immovable member to regulate the lowering of the first door body and / or the second door body, and the door end side portion of the first door body is contained within the recess in the height direction, thereby maintaining the swallowing portion. A sliding door according to any one of claims 1 to 4.

7. When the opening is fully closed, if the protrusion formed on the door end side portion of the first door body is accommodated in the recess formed on the door end side portion of the second door body with a swallowing dimension L, and the door body lowering amount regulating portion of the first door body and the second door body are located a distance D above the portion of the immovable member, When the first door body and the second door body have a height dimension C and a first hoist unit and a second hoist unit spaced apart by an interval A in the door width direction, the swallowing dimension L and the distance D are set to satisfy L>(C / A)×D×2. The sliding door according to claim 6.

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