JP5937256B1 - Elevator landing door equipment - Google Patents

Abstract

Even if a door panel is deformed by receiving heat in the event of a fire, it is possible to reliably prevent a situation in which the phase stack structure is detached. A landing door device according to an embodiment of the present invention is a landing door device having a landing door that is provided in a three-way frame attached to an entrance of an elevator hall so as to be opened and closed via a door hanger. A door panel 14 constituting the main body of the door 10, and attached to the upper end of the door panel 14, with respect to a side surface 6 a on the door panel 14 side of the upper frame 6 of the three-sided frame 4. A flame shield member 20 having a flame shield portion 20a that hangs down, a protrusion 22 provided on the flame shield member 20 so as to stand on the opposite side of the flame shield portion 20, and a header case so as to be positioned immediately above the protrusion 22 12 and an engaging member 24 that engages the protrusion 22 to restrict the extension of the door panel 14 when the door panel 14 expands in the event of a fire. [Selection] Figure 2

Description

  Embodiments described herein relate generally to an elevator hall door device.

In the elevator hall, a three-way frame is attached to an opening serving as an entrance, and a sliding door type door that opens and closes the entrance is provided in the three-way frame. In buildings where elevators are installed, hoistways and elevator halls are fire protection zones. In the event of a fire in a building, if fire or smoke enters the hoistway, the hoistway works as a chimney and the fire becomes stronger and may spread to other floors.
Therefore, it is stipulated by law that the elevator hall be installed with landing doors having predetermined flame barrier performance and smoke barrier performance (Building Standard Act Enforcement Ordinance, Article 112, Paragraph 9 and Paragraph 14).
In addition, various improvements have been added to conventional landing doors in order to improve fire prevention performance.

  For example, in Patent Document 1, in order to prevent deformation of a landing door due to heat at the time of a fire, expansion of a gap between the door and a three-way frame due to deformation, and removal of the door, at least one of a hanger case and a door rail is used. A landing door device is proposed that is slidable upward to absorb thermal expansion of the door.

JP-A-11-11841

  Conventionally, in a landing door, the part where the landing door is in contact with the upper frame of the three-way frame has a so-called phased structure, and when the landing door is closed, the fire goes up and down from the gap between the upper frame of the three-way frame. I try not to enter the roadside. Such a phased structure is also a kind of specification defined by the fire prevention regulations of elevators.

  However, the door panel of the main body of the landing door may be stretched and deformed by heat during a fire. If the door panel is greatly deformed, there is a risk that the overlapped portion that has previously overlapped to close the gap will come off.

  The present invention has been made in view of the problems of the prior art, and even if the door panel is deformed by receiving heat in the event of a fire, it is possible to reliably prevent a situation in which the phase stack structure is detached. It is an object to provide a landing door device for an elevator.

  To achieve the above object, according to an embodiment of the present invention, there is provided a landing door device having a landing door provided on a three-way frame attached to an entrance of an elevator landing so as to be opened and closed via a door hanger. A door panel that constitutes the main body of the door, and a flame barrier part that is attached to the upper end of the door panel and hangs downward on the side of the upper frame of the three-side frame on the door panel side so as to overlap inside the upper frame. A flame shield member, a projection provided on the flame shield member so as to stand up to the opposite side of the flame shield portion, a header case so as to be positioned immediately above the projection portion, and the door panel in the event of a fire And an engaging member that engages with the projecting portion and restricts the extension of the door panel when expanded.

It is the front view which looked at the landing door apparatus of the elevator by embodiment of this invention from the hoistway side. It is the II-II sectional view taken on the line of FIG. It is a perspective view which shows the principal part of the landing door apparatus of the elevator by 1st Embodiment of this invention, and shows the positional relationship of the protrusion part of a flame-shielding part, and an engagement member. It is sectional drawing which shows the effect | action at the time of the fire of the elevator landing door apparatus by 1st Embodiment of this invention. It is a perspective view which shows the modification of the flame-shielding member used for the elevator landing door apparatus by 1st Embodiment of this invention. It is a perspective view which shows the other modification of a flame-shielding member. It is a perspective view which shows the principal part of the elevator landing door apparatus by 2nd Embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an elevator landing door device according to the present invention will be described with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a front view of an elevator hall door device according to the present embodiment as seen from a hoistway side. 2 is a cross-sectional view taken along line II-II in FIG.
In the elevator hall, an entrance to a car (not shown) is formed in the hoistway wall 2. A three-sided frame 4 is attached along the opening edge of the doorway. The three-way frame 4 is composed of a pair of vertical frames 5 and 5 along the left and right side edges of the doorway, and an upper frame 6 that is horizontally installed between the upper ends of the vertical frames 5 and 5. . A sill 7 is attached to the lower edge of the entrance. The landing door device of this embodiment includes a double door type landing door 10.

  As shown in FIG. 2, a header case 12 is attached to the upper frame 6 of the three-way frame 4 in a vertical posture. A door rail 13 is supported horizontally on the header case 12. The main body of the landing door 10 is constituted by a door panel 14, and a door hanger 15 is attached to the upper end portion of the door panel 14 in parallel with the header case 12.

  Since the roller 16 that rolls on the door rail 13 is rotatably attached to the door hanger 15, the door panel 14 opens and closes while being suspended by the door hanger 15 via the roller 16.

  Further, a flame shield member 20 having the following flame shield portion is attached to the upper end portion of the door panel 14. The flame shield member 20 is composed of a long angle member having an L-shaped cross section having a length corresponding to the entire width of the door panel 14, and when a fire breaks out, the flame is introduced to the hoistway side from the gap between the door panel 14 and the upper frame 6. It is a member for preventing entry.

  When the flame shield member 20 is attached to the door panel 14, the flame shield portion 20a, which is one side surface portion, is parallel to the vertical plane. The flame shield 20a overlaps the inner side of the upper frame 6 with respect to the side surface of the upper frame 6 of the three-way frame 4, in this case, the side surface 6a in which a gap is formed with the door panel 14. . Specifically, the side surface portion 6a of the upper frame 6 rises upward, and the flame shield 20a hangs downward, so that the structure has an overlapping portion so as to extend toward each other (compounding) Structure). In this case, the side surface portion 6a and the flame shield portion 20a may be in contact with each other at overlapping portions or may not necessarily be in contact with each other.

  As shown in FIG. 3, in the flame shield member 20 of the present embodiment, a protrusion 22 is formed in the center portion so that the flame shield 20 a is folded back and protrudes further upward from the horizontal plane portion 20 b.

  On the other hand, when the door panel 14 expands in the event of a fire, an engagement member 24 that can engage with the protrusion 22 of the flame shield member 20 is attached to the header case 12 at a position directly above the protrusion 22. In the example shown in FIG. 3, the engaging member 24 is a metal fitting having an L-shaped cross section having a flange portion 24 a that hangs downward.

  In the case of this embodiment, a gap of a predetermined dimension is set between the tip of the protrusion 22 of the flame shield member 20 and the lower surface of the engagement member 24, and the upward extension of the door panel 14 is constant. In other words, the flame shield 20a of the flame shield 20 is allowed within the range where the flame shield 20a does not come off from the side 6a of the upper frame 6.

  The elevator hall door device according to the present embodiment is configured as described above, and the operation and effect thereof will be described next.

  When a fire occurs on the floor of a building, the fire may spread from the source of fire to the landing. At this time, the landing door 10 is closed and the doorway is closed. When the fire approaches the landing door 10, the door panel 14 is stretched or warped due to heat from the flame. As shown in FIG. 4A, under this situation, the door panel 14 is deformed so as to project to the hoistway side.

  On the other hand, at the elevator hall, not only does the fire heat the door panel 14, but the fire with increased momentum tries to enter the hoistway side through the gap between the upper frame 6 of the three-way frame 4 and the door panel 14 as indicated by the arrows. To do. In the present embodiment, the upper end portion of the door panel 14 is provided with a flame shield portion 20a for preventing such a flame from entering, and functions as follows.

  That is, as shown in FIG. 4 (A), due to the deformation of the door panel 14, the tip of the flame shield 20a comes into contact with the side surface 6a of the upper frame 6 so as to cover from above. Due to the contact between the flame shield 20a and the inner surface of the side surface 6a, the intrusion path of the flame that goes around from the outside of the side surface 6a and enters the hoistway side is blocked.

  Thereafter, there is a concern that the fire-shielding portion 20a may come off from the side surface portion 6a of the upper frame and the flame-shielding function will not work due to the increase in the fire force and the deformation of the door panel 14, particularly the elongation.

  However, as shown in FIG. 4B of this embodiment, when the door panel 14 extends further upward, the protrusion 22 of the flame shield member 20 contacts the lower surface of the engagement member 24. Accordingly, the upward extension of the door panel 14 is restricted, and the flame shield 20a can be prevented from coming off from the side surface 6a of the upper frame, so that the flame shield function by the phase stack structure can be maintained. .

By the way, in FIG. 2, the roller 16 of the door hanger 15 may come off from the door rail 13 due to the extension of the door panel 14, and the door panel 14 may fall into the hoistway.
However, in this embodiment, the protrusion 22 of the flame shield 20a and the flange 24a of the engagement member 24 are engaged with each other. Since the flange portion 24a engages with the protruding portion 22 in a direction that prevents the door panel 14 from dropping off, the door panel 14 can be prevented from falling into the hoistway.

The embodiment described above is a form in which the flame shield member 20 made of an angle member having an L-shaped cross section is provided with the flame shield portion 20a and the protruding portion 22. However, FIGS. 5 and 6 show modified examples of the flame shield member. FIG.
FIG. 5 shows a modification in which the flame shield member is divided into two flame shield members 30A and 30B.
These flame shield members 30 </ b> A and 30 </ b> B are joined by welding via an L-shaped member 32 that functions as the projecting portion 22, thereby forming one flame shield member having the flame shield portion 20 a and the projecting portion 22. ing.

  Instead of dividing the flame shield member as shown in FIG. 5, as shown in FIG. 6, an L-shaped member 32 functioning as the protruding portion 22 is fixed to one flame shield member 20 by welding or the like. May be.

  According to the modified example as described above, there is an advantage that the bending process of turning back the protruding portion 22 is not necessary, and only welding by combining components is required.

(Second Embodiment)
Next, an elevator landing door apparatus according to a second embodiment of the present invention will be described with reference to FIG. In FIG. 7, the same components as those in FIG. 3 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the second embodiment, as a member that engages with the protruding portion 22 of the flame shield portion 20a, an engaging protrusion using a screw or the like is used instead of the L-shaped engaging member 24 shown in FIG. 12 is an embodiment in which the apparatus is attached to the Twelve.

  As shown in FIG. 7, a screw 34 as an engaging protrusion is fastened to the header case 12 so that the head 34 a protrudes from the header case 12. A notch groove 35 is formed in the projecting portion 22 in the vertical direction, and a shaft of a screw 34 can be fitted into the notch groove 35. The width of the notch groove 35 is set to be smaller than the diameter of the head 34 a of the screw 34.

The operation of the second embodiment as described above will be described.
When the door panel 14 extends upward, the shaft of the screw 34 enters the notch groove 35 of the protrusion 22, and the shaft of the screw 34 contacts the lower edge of the notch groove 35. Accordingly, the upward extension of the door panel 14 is restricted, and the flame shield member 20a can be prevented from coming off from the side surface portion 6a of the upper frame, so that the flame shield function by the phase stack structure can be maintained. .

  Further, the projecting portion 22 of the flame shield member 20a and the head portion 34a of the screw 34 come to engage with each other, and the screw 34 engages with the projecting portion 22 in a direction that prevents the door panel 14 from falling off. It is possible to prevent the door panel 14 from falling into the hoistway.

  As mentioned above, although the landing door apparatus of the elevator which concerns on this invention was given and demonstrated with suitable embodiment, these embodiment was given as an illustration and does not intend the restriction | limiting of the range of invention. Of course, the novel apparatus, method and system described in the specification can be implemented in various forms, and various omissions, substitutions and changes can be made without departing from the spirit of the present invention. is there. The claims and their equivalents are intended to cover the embodiments or improvements thereof within the spirit of the invention.

2 ... hoistway wall, 4 ... three-way frame, 5 ... vertical frame, 6 ... upper frame, 7 ... sill, 10 ... landing door, 12 ... header case, 13 ... door rail, 14 ... door panel, 15 ... door hanger, 16 ... Roller, 20 ... Flame shield member, 20a ... Flame shield portion, 22 ... Projection portion, 24 ... Engagement member, 24a ... Gutter, 30A, 30B ... Flame shield member, 34 ... Screw, 34a ... Screw head

Claims (5)

In a landing door device having a landing door that can be freely opened and closed via a door hanger in a three-way frame attached to the entrance of an elevator landing,
A door panel constituting a main body of the landing door;
A flame shield member attached to the upper end of the door panel, and having a flame shield part that hangs downward so as to overlap the inner side of the upper frame with respect to the side surface on the door panel side of the upper frame of the three-way frame;
A protrusion provided on the flame shield member so as to stand on the opposite side of the flame shield part;
An engaging member that is provided on the header case so as to be positioned immediately above the protruding portion, and that engages the protruding portion and restricts the extension of the door panel when the door panel expands in the event of a fire. Elevator hall door device characterized by this.   The said flame shield member is formed of an angle member having an L-shaped cross section with one side surface portion serving as a flame shield portion, and a part of the flame shield portion is folded back to form the protruding portion. Elevator landing door equipment.   The elevator landing door device according to claim 2, wherein the engaging member has a flange portion that restrains the protruding portion in a direction that prevents the door panel from falling off when the protruding portion is engaged. .   The said engaging member consists of an engaging projection part using a screw, The notch groove which the shaft of the said screw can fit in is formed in the said flame-shielding part. The elevator landing door device described.   3. The elevator hall according to claim 2, wherein the flame shield member is divided into two angle members, and an L-shaped member functioning as the projecting portion is welded to the two angle members. Door device.

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