JP7489764B2 - sliding door - Google Patents

Description

The present invention relates to sliding doors, and more specifically to sliding doors that function as fire protection equipment.

Sliding doors, such as automatic doors, slide left and right as the rollers of the left and right hanging wheel units installed at the top end of the door body run on rails to open and close the opening. Plastic rollers are often used to reduce noise when the door body runs, but if the resin of the rollers melts due to the heat of a fire or other event when the opening is fully closed, 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 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.

In order to prevent the gate 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.

Patent Documents 1 and 2 describe fall-off prevention means for preventing rollers from falling off rails in sliding doors. These documents prevent the rollers from falling off the rails, thereby preventing the door body from moving out of its normal position.
Patent No. 3084619 Patent No. 4105330

The purpose of this invention is to prevent the formation of gaps that are disadvantageous in terms of fire prevention at the door edge of a sliding door when the door body is in a fully closed position.

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 aspect, 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 aspect, 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.

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 of the swallowing portion is L (for example, when the opening is fully closed, the door tip side portion of the door body is contained within the recess by the swallowing dimension L), and the door body lowering amount regulating portion is located a distance D above the immovable member. 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 the swallowing portion is maintained throughout the height direction (the door tip side portion of the door body is contained within the recess throughout the height direction) and no gap is formed when viewed from the front, even when the door body is at its maximum inclination due to lowering.
When a single-sliding door is formed by 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, the maximum drop amount of the door body is D, and the swallowing dimension L is set to satisfy L > (C/A) x D.
The dimension (C/A) x D represents the horizontal movement of the lower end or upper end of the door body on the leading edge side when the door body is at its maximum inclination (specifically, when only one of the first and second hoist unit is lowered by the maximum amount).
As is clear from the formula L>(C/A)×D, the swallow dimension L can be made small by setting the distance D small.

A component 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 may be an immovable member supported by the upper case.

In one aspect, 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 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.

In one aspect, 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 or down, the other end moves up or 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.

In one aspect, the swallowing portion is formed by the door front side portion of the door body and a vertical frame that constitutes the sliding door frame.
In one aspect, 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.

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 a 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 side projecting surface of the second door body, or a recess may be provided in the leading edge side projecting surface 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, the maximum drop amount of the first and second door bodies is D, the swallowing dimension L is set to satisfy L > (C/A) x D x 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 the upper ends or lower ends of the door body sides move away from each other).

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 of 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 parts of the hoist unit to be standardized.
In the present invention, the door body sagging amount is limited by the door body sagging amount regulating portion, so that excessive inclination of the door body when the opening is fully closed can be regulated, and therefore the swallowing dimension of the door body's door edge 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 edge side portion relative to the recess.

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. 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. 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. FIG. 2 is a diagram showing a driving mechanism for the sliding door according to the embodiment. FIG. 2 is a diagram showing the upper end portion of the sliding door body and the hoist unit according to the present embodiment. 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. FIG. 2 is a front view of the separate sliding door according to the embodiment (when the opening is fully closed) as viewed from the outdoor side. 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. 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.

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) viewed from the outdoor side, Fig. 2 is a cross-sectional view of the sliding door according to this embodiment, with the upper side being the outdoor side and the lower side being the indoor side, and Fig. 3 is a vertical cross-sectional view of the sliding door according to this embodiment, with the left side being the outdoor side and the right side being the indoor side. The sliding door according to this embodiment is an automatic door consisting of a top-hung sliding door.

The sliding door is equipped 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 vertically 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 from a glass panel G. In this embodiment, the leading edge vertical frame 1 and 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 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.

The sliding door has a vertically rectangular door body 6 that 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.

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

More specifically, as shown in FIG. 5, the rail member 7 has 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. 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 rail 70 is a convex portion, but for example, a groove-shaped rail may be formed from a concave portion.

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 tail of the upper end of the door body 6 (see Figure 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.

The hoisting wheel unit 8 has 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 has 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.

The door body 6 can slide 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, a vibration prevention 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 vibration prevention protrusion 630 at the lower end moves along the guide groove 40 formed in the lower frame 4.

The arm 81 is supported so that it can rotate up and down with its midpoint in the length direction as a pivot point. More specifically, the arm 81 can rotate (swing) 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 of the arm 81 in the length direction (i.e., the resin roller 80) can move slightly up and down as needed, allowing the door body 6 to slide smoothly.

The horizontal base 84 of the hoisting wheel unit 8 is provided with a sliding contact portion 85 with good sliding properties, located below the middle part of the arm 81 in the longitudinal direction (the pivot point of the arm). The sliding contact portion 85 in 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 underside of the rail 70 of the rail member 7, and together with the two resin rollers 80 that contact the upper surface of the rail 70, it prevents the resin roller 80 of the hoisting wheel unit 8 from coming off the rail 70. All of the components of the hoisting wheel unit 8 in this embodiment, except for the resin rollers 80 and the sliding contact portion 85, are made of metal (steel).

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 between 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. Since the drive mechanism of an automatic door is well known, 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.

An activation sensor S1 is provided on the outdoor facing surface 30 and indoor facing surface 31 of the upper case 3, located above the building opening. When the activation sensor S1 detects a person positioned in front of the building opening, the motor 30 is activated to open the door body 6, which is in a fully closed position. A touch sensor S2 is provided on the outdoor facing surface 600 and 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 activated to open the door body 6, which is in a 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.

The hoist unit 8 has a door body sagging amount control section 9. The door body sagging amount control section 9 in this embodiment is made of a metal plate. More specifically, as shown in FIG. 6, the door body sagging amount control section 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 sagging amount control section 9 is attached to the arm 81 by fixing the widthwise center portion to the pivot shaft portion 810 of the arm 81. The lowest point of the curved edge 90 of the door body sagging amount control section 9 is located directly below the pivot point 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 sagging amount control section 9 made of a metal plate is attached to this concave portion. As shown in FIG. 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 outside), so that when the door body 6 is lowered, it does not abut against the rail 70, but rather against the portion of the rail member 7 that supports the rail 70 (specifically, the first portion 710 of the horizontal edge 71).

When the door body 6 is normally opened/closed and fully closed, 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 sagging amount regulating section 9 is spaced a distance D from the upper surface of the first part 710 of the horizontal side 71 of the rail member 7. Since the lower end of the curved edge 90 of the door body sagging amount regulating section 9 of the hoist unit 8 is spaced a distance D from the upper surface of the first part 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 sagging amount regulating section 9 does not come into contact with the rail member 7. The door body lowering amount regulating part 9 is fixed to the arm 81 and rotates (swings) together with the arm 81, but the lowest point of the curved edge 90 of the door body lowering amount regulating part 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 part 9 is constant, and the door body lowering amount regulating part 9 does not come into contact with the rail member 7 regardless of the position of the arm 81 (door body lowering amount regulating part 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 part 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 part 9 is not limited to a metal plate, and the shape, etc. are not limited as long as it has an abutment part that abuts against a non-moving member such as the rail member 7.

When the opening is fully closed, if the heat of a fire melts or deforms the plastic roller 80 of the hoist unit 8, the height dimension of the plastic roller 80 may decrease. At this time, the door body 6 will drop by the amount of the reduction in the height of the plastic roller 80, but when the door body 6 has dropped vertically by a distance D, the lowest point of the curved edge 90 of the door body drop amount control section 9 abuts against the upper surface of the first part 710 of the horizontal edge 71 of the rail member 7, limiting the amount of drop of the door body 6. In other words, the distance D defines the maximum amount of drop of the door body 6.

The sliding door according to this embodiment can be used as a fire prevention device, and when the opening is fully closed, no gaps that penetrate from indoors to outdoors are formed on the leading and trailing ends of the door body 6. On the trailing end of the door body 6, the trailing end vertical frame 61 of the door body 6 overlaps with the leading end vertical frame 50 of the fixed panel 5, and a clash structure is formed between the first edge 61a formed on the trailing end vertical frame 61 and the second edge 50a formed on the leading end vertical frame 50.

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 side 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 side vertical frame 1 of the sliding door frame, as shown in Figure 2. The member 11' has a concave shape in cross section from the outdoor side edge 110', the indoor side edge 111', and the bottom edge 112', and the bottom edge 112' is fixed to the projected surface of the door end side vertical frame 1, and the recess 11 is formed from the area surrounded by the outdoor side edge, the indoor side edge, and the bottom edge. A protrusion 602 is formed along the height direction on the end surface of the leading edge vertical frame 60 of the door body 6, and when the opening is fully closed, the protrusion 602 of the leading edge vertical frame 60 of the door body 6 fits into the recess 11 formed on the projected surface 10 of the leading edge vertical frame 1 with a swallowing dimension L.

When the opening is fully closed, the plastic roller 80 melts or deforms due to the heat of a fire, causing the door body 6 to lower. When the door body 6 has lowered by a distance D, the door body lowering amount regulating part 9 comes into contact with the upper surface of the first part 710 of the horizontal edge 71 of the rail member 7, thereby restricting the door body 6 from lowering further. 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.

In this embodiment, the door body sagging amount regulating section 9 regulates the amount of sagging of the door body 6, so that even if there is a difference in height between the leading edge and trailing edge of the door body 6 when 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 leading edge of the door body 6 when viewed from the front) can be regulated, and the protrusion 602 on the leading edge of the door body 6 remains within the recess 11 throughout the height direction, preventing the formation of a gap on the leading edge of the door body 6 that penetrates from indoors to outdoors when viewed from the front.

Specifically, when the opening is fully closed, the protrusion 602 of the door body 6 at the door end side is contained within 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 part 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 contained within the recess 11 over the height direction, and no gap is formed when viewed from the front. In practice, the swallowing dimension L can be reduced by setting the distance D small. 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 there is no need to increase the depth dimension of the recess 11. The recess 11 may be sufficiently deep, 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, when the opening is fully closed, 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, but it is also possible to form a recess or groove in the height direction on the door-end side end face of the door body 5, form a convex part in the height direction on the projected surface of the door-end side vertical frame 1 of the sliding door frame, and form the swallowing portion by fitting the convex part 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.

With reference to Figures 7 and 8, another embodiment of the present invention will be described. Figure 7 is a front view of the sliding door according to this embodiment (when the opening is fully closed) as seen from the outdoor side, and Figure 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.

The sliding door has 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 of the sliding door frame, and a building opening is formed between the leading edge vertical frame 50A of the first fixed panel 5A and the leading edge 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 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 the upper frame 3'. A glass panel G is fitted into the space between the upper frame 3' and the upper case 3.

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 leading edge vertical frame 60A, a trailing edge 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 leading edge vertical frame 60A, the trailing edge vertical frame 61A, the upper frame 62A, and the lower frame 63A, and the glass panel G forms the surface portion. The second door body 6B has a leading edge vertical frame 60B, a trailing edge vertical frame 61B, an upper frame 62B, and a lower frame 63B. 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.

The outdoor facing surface 30 and the indoor facing surface 31 of the upper case 3 are provided with an activation sensor S1 located above the building opening. When the activation sensor S1 detects a person in front of the building opening, the motor 30 is activated to pull open the first door body 6A and the second door body 6B, which are in the fully closed position. 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 activated 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 open. Either the activation sensor S1 or the touch sensor S2 can be used depending on the installation location of the automatic door, etc.

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 section 9, and the configuration of the rail member 7 and the hoist unit 8 equipped with the door body lowering amount regulating section 9 can be referenced from the above description. In addition, the automatic door itself, which is a pull-out type and consists of a top-hung sliding door, is well known, so a description of the drive mechanism will be omitted.

The sliding door according to this embodiment can be used as a fire prevention device, and when the opening is fully closed, no gaps are formed on the leading and trailing ends of the first and second door bodies 6A and 6B that penetrate to the indoor side. On the trailing end of the first door body 6A, the trailing end vertical frame 61A of the first door body 6A overlaps with the leading end vertical frame 50A of the fixed panel 5A, and a gap is formed between the trailing end vertical frame 61A and the leading end vertical frame 50A (see Figs. 2 and 8). On the trailing end of the second door body 6B, the trailing end vertical frame 61B of the second door body 6B overlaps with the leading end vertical frame 50B of the fixed panel 5B, and a gap is formed between the trailing end vertical frame 61B and the leading end vertical frame 50B (see Figs. 2 and 8).

In this embodiment, as shown in FIG. 8, a joint is formed from the leading edge portion of the first door body 6A and the leading edge portion of the second door body 6B, and the joint serves as a swallowing portion. More specifically, a convex portion 600A is formed in the leading edge vertical frame 60A of the first door body 6A along the height direction, and a concave portion 600B is formed in the leading edge vertical frame 60B of the second door body 6B along the height direction, so that when the opening is fully closed, the convex portion 602 of the leading edge vertical frame 60A of the first door body 6A fits into the concave portion 600B formed in the leading edge vertical frame 60B of the second door body 6B with a swallowing dimension L.

In this embodiment, the door body lowering amount regulating unit 9 regulates the amount of lowering of the first door body 6A and the second door body 6B. Even if there is a difference in height between the leading edge side and trailing edge side of the first door body 6A in the fully closed position, and/or there is a difference in height between the leading edge side and trailing edge side of the second door body 6B in the fully closed position, excessive inclination of the first door body 6A and/or the second door body 6B when the opening is fully closed (first door body 6A in front view) is prevented. This can regulate the tilt that would cause a gap to form in the joint formed by the protrusion 600A of the first door body 6A and the recess 600B of the second door body 6B, keeping the protrusion 600A of the door end side part of the first door body 6A contained within the recess 600B of the door end side part of the second door body 6B throughout the height direction, and prevents the formation of a gap that penetrates from indoors to outdoors in the joint formed by the protrusion 600A of the first door body 6A and the recess 600B of the second door body 6B when viewed from the front.

Figure 9 is a schematic diagram explaining the relationship between the maximum amount of sagging of the door body and the swallowing dimension of the door body's door edge side portion. In Figure 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 amount of sagging of the door body is D, and the movement width of the lower end of the door body when the door body is at its maximum inclination is S. In this embodiment (the single-sliding type sliding door shown in Figures 1 to 4 and the sliding type sliding door shown in Figures 7 and 8), both the first and second hoisting wheel units have two rollers, but 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.

(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 FIG. 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 FIG. 9, if we consider a right triangle with hypotenuse A+B, short side {(A+B)/A}×D, and long side E, the interval E can be expressed as in equation (3).
(d) From the two right-angled triangles in the left diagram of Figure 9, Y = (C/A) x D, as shown in equation (4).
(E) When D is sufficiently small relative to A+B, X can be considered as X≒0, and in fact, D is sufficiently small relative to A+B.
(f) Therefore, as shown in equation (5), S ≈ (C/A) × D.

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

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 fits within the recess throughout the height direction) even when the door body is at its maximum inclination due to being lowered.

In the case of a single-sliding door, the door body is most inclined as shown in the left figure of Figure 9 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 a distance A in the door width direction, the swallow dimension L is set to satisfy L > (C/A) x D. Therefore, in the case of a single-sliding door, if D and L are designed to satisfy L > S ≒ (C/A) x 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 fits into the recess over the entire height direction, and no gap is formed when viewed from the front. In the above example, when D = 2 mm, L > 5.33 mm.

For sliding doors, it is necessary to consider the case where the first door body and the second door body are each most tilted 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 combination 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 a first and second door body with a height dimension C and a first and second hoist unit that are separated by a distance A in the door width direction, the swallow dimension L is set to satisfy L > (C/A) x D x 2. Therefore, in the case of a sliding door, if D and L are designed to satisfy L > 2S ≒ (C/A) x D x 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 = 2 mm, L > 10.66 mm.

The above embodiment relates to an automatic door, but 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 split sliding door with two door bodies 6A and 6B is shown, but the present invention can also be applied to a so-called double split sliding door.

Reference Signs List 1 Door end vertical frame 6 Door body 7 Rail member 70 Rail 8 Suspension wheel unit 80 Resin roller 81 Arm 9 Door body lowering amount control portion 90 Curved edge D Maximum lowering amount L Swallowing dimension

Claims (7)

A sliding door having 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, a door end portion of the door body is stored so as to form a swallow portion over 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. The door lowering amount regulating portion is an element other than the roller,
2. The sliding door according to claim 1, wherein the immovable member is a rail member that forms or supports the rail. 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 according to claim 1 or 2. The hoist unit includes two rollers spaced apart in the width direction of the opening, and an arm that rotatably supports the two rollers is supported at a middle portion in the length direction so as to be rotatable in the up and down direction, and the door body lowering amount regulating portion is provided at a middle portion in the length direction of the arm.
A sliding door according to any one of claims 1 to 3. 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 swallowing 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. 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 claims 1 to 4. 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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