JPWO2020105073A1 - Elevator landing side door device - Google Patents

Abstract

Provided is an elevator landing side door device capable of suppressing the formation of a gap between the lower end surface of the landing side door and the threshold and suppressing the invasion of flames and smoke into the hoistway side. The lower end of the door panel 9 arranged so as to face the threshold 13 provided with the guide groove 18 on the side facing the hoistway has a length dimension substantially the same as the total width of the door panel in the lateral direction and has a predetermined strength. The door shoe bracket 11 is attached, and the lower end side of the door shoe bracket 11 extends so as to be located inside the guide groove of the sill. Since the long door shoe bracket 11 having a predetermined strength is provided, the deformation of the lower end side of the door panel 9 is suppressed and a gap is not formed, so that flames and smoke can be suppressed from entering the hoistway. Further, since the lower end side of the door shoe bracket 11 is located inside the guide groove 18 of the sill, it is possible to prevent flames and smoke from entering the hoistway from between the sill 13 and the door panel 9.

Description

The present invention relates to an elevator door device, and more particularly to an elevator landing side door device that opens and closes a landing side entrance / exit.

In a general elevator, a platform side entrance / exit is provided in the platform hall provided on each floor of the building so that passengers can get on and off. Similarly, the car is also provided with a car-side entrance for passengers to get on and off. The landing-side entrance / exit and the car-side entrance / exit are provided with a landing-side door and a car-side door that can be opened and closed, respectively.

By the way, when a fire breaks out in a building where an elevator is installed, the landing side door provided in the elevator landing hall is deformed by the heat of the flame, and the door stop of the landing side door or the lower end side of the landing side door. If an unintended opening is created between the sill and the sill, flames and smoke may enter the hoistway through this opening and spread to the other floors of the building due to the so-called "chimney effect".

Therefore, when a fire breaks out on the landing hall side, an elevator described in, for example, Japanese Patent Application Laid-Open No. 4-19790 (Patent Document 1) is used to prevent an unintended opening in the landing side door. It has been known. The elevator in Patent Document 1 is provided with a door shoe in which the upper end side of the landing side door is suspended from a door rail and the lower end side is guided by a guide groove of a sill, and the landing side door is opened and closed along the floor surface of the landing hall. It is an elevator.

Then, in this landing side door, a fixing pin that protrudes downward is provided on the lower end surface of the landing side door on the door stop side, and is fixed to the bottom of the guide groove of the sill facing the fixing pin with the landing side door closed. An engaging hole of a size that allows the pin to engage is provided, and the gap between the lower end of the fixing pin and the bottom of the guide groove of the sill is set smaller than the gap between the lower end surface of the landing side door and the upper end surface of the sill. It is said that it has a structure.

In the event of a fire in a building, the landing side door is exposed to the heat of the flame on the front side exposed to the landing hall, and the back side is exposed to the low temperature air of the hoistway, and is made of metal such as steel plate. The landing side door is rapidly expanded and at the same time deformed so as to protrude toward the surface side.

This is because the temperature difference between the front side and the back side of the landing side door and the upper end surface side and the lower end surface side of the landing side door are restrained by the door rail and the sill, thereby in the vertical direction of the landing side door. The extension of the door is suppressed, and the landing side door is deformed so as to project toward the surface side. This deformation increases with the time of exposure to the flame, and with this deformation, the door stop of the landing side door moves to the left and right in the direction of the door pocket, and the opening is widened.

However, in the landing side door described in Patent Document 1, the fixing pin is engaged with the engagement hole by the vertical extension action of the landing side door at the initial stage of heating by the flame, so that the landing side door is The movement that spreads to the left and right is restricted, and the expansion of the opening can be suppressed, and as a result, the intrusion of flames and smoke into the hoistway can be suppressed.

Japanese Unexamined Patent Publication No. 4-19790

By the way, in the landing side door described in Patent Document 1, the bracket for holding the door shoe and the bracket for holding the door shoe arranged adjacent to the bracket are arranged apart from each other, and between these brackets. Since a gap is formed between the lower end surface of the landing side door and the upper end surface of the sill, there is a problem that flames and smoke are likely to enter the hoistway through this gap.

Furthermore, if the time of exposure to the heat of the flame is long, the lower end surface of the door on the landing side is further deformed and protrudes toward the landing hall side to form a gap, and there is a high risk that flame or smoke will enter the hoistway through this gap. There is a problem. By the way, since the brackets of Patent Document 1 are arranged apart from each other, the effect of suppressing the deformation of the lower end surface of the landing side door cannot be expected so much.

Therefore, for any or both of the above reasons, it is assumed that flames and smoke enter the hoistway through the gap on the lower end surface of the landing side door, and further improvement is required.

An object of the present invention is to provide a new elevator landing-side door device capable of suppressing a gap between the lower end surface of the landing-side door and a threshold and suppressing flames and smoke from entering the hoistway side. To provide.

A feature of the present invention is that the lower end of the door panel arranged so as to face the threshold provided with the guide groove on the side facing the hoistway has a length dimension substantially the same as the total width of the door panel in the lateral direction, and is predetermined. A strong door shoe bracket is attached, where the lower end of the door shoe bracket extends to be located inside the guide groove of the sill.

Further, preferably, an engaging piece is provided at the lower end of the door shoe bracket on the door stop side of the door panel, and when the door panel is in the closed state, the engaging piece engages with the bottom of the guide groove at the position where the engaging piece exists. It is located where it has an engaging hole that can be used.

According to the present invention, since a long door shoe bracket having a predetermined strength having substantially the same length as the total width in the lateral direction of the door panel is provided, deformation of the lower end side of the door panel is suppressed and a gap is not formed. , It is possible to prevent flames and smoke from entering the hoistway. Further, since the lower end side of the door shoe bracket is located inside the guide groove of the sill, it is possible to prevent flames and smoke from entering the hoistway from between the sill and the door panel.

Further, when the door panel is thermally expanded and deformed due to a fire or the like, the engaging piece engages with the engaging hole provided at the bottom of the guide groove and fixes the lower end of the door panel on the door stop side to the sill. By suppressing the deformation of the lower end side of the door stop portion in the opening direction, a gap is not formed, and it is possible to prevent flames and smoke from entering the hoistway.

It is a block diagram which shows the schematic structure of the elevator to which this invention is applied. It is a front view which looked at the landing entrance in a landing hall from the front. It is a back view which looked at the landing side door which becomes 1st Embodiment of this invention from the hoistway side. FIG. 3 is a cross-sectional view showing a cross section in the direction of arrow AA shown in FIG. It is a perspective view of the door shoe bracket shown in FIG. It is the top view which looked at the sill which guides the lower end surface of a door from above. It is a perspective view which shows the modification of the door shoe bracket shown in FIG. It is explanatory drawing explaining the relationship between the lower end surface of a door in normal times, and the sill in the 1st Embodiment of this invention. FIG. 5 is a cross-sectional view showing a cross section in the direction of arrow BB in FIG. It is explanatory drawing explaining the relationship between the lower end surface of a door at the time of a fire, and the sill in the 1st Embodiment of this invention. It is sectional drawing which shows the cross section in the direction of CC arrow of FIG. It is sectional drawing explaining the relationship between the lower end surface of a door in normal times, and the sill in the 2nd Embodiment of this invention. It is sectional drawing explaining the relationship between the lower end surface of a door at the time of a fire, and the sill in the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following embodiments, and various modifications and applications are included in the technical concept of the present invention. Is also included in that range.

FIG. 1 shows a schematic configuration of an elevator to which the present invention applies. The elevator has a car 2 and a counterweight 3 that move up and down inside the hoistway 1 formed in the building, and both ends are fixed to the wall surface of the upper part of the hoistway, and the car 2 and the counterweight are located in the middle of the elevator. A main rope 4 for suspending the 3 and a hoisting machine 5 arranged below the hoistway 1 and having a sheave 5A on which the main rope 4 is wound are provided. Then, by hoisting and driving the main rope 4 by the hoisting machine 5, the car 2 and the counterweight 3 move up and down the hoistway 1 in opposite directions, and travel to the target destination floor. Further, a car side door 6 is provided at the entrance / exit of the car 2.

As described above, in the elevator, a platform side entrance / exit is provided in the platform hall (see Fig. 2) provided on each floor of the building so that passengers can get on and off. There is an entrance on the car side where you can get on and off. A landing-side door 8 and a car-side door 6 that can be opened and closed are provided at the landing-side entrance / exit and the car-side entrance / exit, respectively.

FIG. 2 shows a state in which the entrance 7B of the landing hall 7 on which the car 2 shown in FIG. 1 lands is viewed from the front. An entrance / exit 7B is formed on the wall surface 7A of the landing hall 7, and a pair of landing-side doors 8 are provided at the entrance / exit 7B. In the landing side door 8, the engaging member of the car side door 6 engages with the engaged member of the landing side door 8 in a state where the car 2 (see FIG. 1) arrives at the landing hall 7 and is stopped. It is configured to do. Then, when the car side door 6 is opened and closed by the door drive mechanism, this opening / closing operation is transmitted by engaging the engaging member with the engaged member, and the landing side door 8 is interlocked with the car side door 6. It opens and closes as indicated by the arrow.

Next, an embodiment of the present invention will be described with reference to FIGS. 3 to 6. Here, FIG. 3 is a view of the landing side door from the hoistway side, FIG. 4 is a view from the direction of arrow AA shown in FIG. 3, and FIG. 5 is a door shoe bracket shown in FIG. The whole is viewed from an angle, and FIG. 6 is a top view of the threshold on which the lower end surface of the landing side door is guided.

As shown in FIG. 3, the landing side door device was fixed with bolts 10 to at least two door panels 9 approaching and separating from each other and the lower end side of the door panel 9 facing the hoistway. The door shoe bracket 11 and the door shoe 12 held at a predetermined interval so as to sandwich the door shoe bracket 11 on the lower end side of the door shoe bracket 11 are arranged so as to face the lower end side of the door panel 9. The door shoe bracket 11 is provided with a threshold 13 provided in the landing hall for guiding the door shoe bracket 11, and a rail frame 14 for suspending and holding the upper end side of the door panel 9. The rail frame 14 is fixed to the upper part of the landing side entrance / exit 7B.

The door panel 9 constitutes the landing side door 8, is a substantially rectangular plate material made of metal such as a steel plate, and is provided with a hanger 15 at the upper end portion. The hanger 15 has two hanger rollers 16 and is suspended from the door rail 17 of the rail frame 14. Therefore, in the door panel 9, the hanger roller 16 is rolled on the door rail 17 according to the moving direction of the hanger 15, and the opening / closing operation is executed.

The door shoe bracket 11 is a long bracket that is attached and fixed to the lower part of the door panel 9 by bolts 10, and has substantially the same length dimension as the total width (Lh) in the lateral direction of the door panel 9. Here, the lateral direction means a direction along the floor surface of the landing hall 7, that is, a direction orthogonal to the direction of gravity when the elevator is installed in the building.

Further, the lower end side of the door shoe bracket 11 is housed in the groove of the guide groove 18 of the threshold 13 together with the door shoe 12, and can freely move in the groove of the guide groove 18 in response to the movement of the door panel 9. The door shoe 12 is formed of a fluororesin such as polytetrafluoroethylene having excellent lubricity, whereby the door shoe bracket 11 can smoothly slide in the guide groove 18 of the threshold 13.

Then, as shown in FIGS. 3 and 4, as one of the important viewpoints of the present embodiment, the lower end side of the door shoe bracket 11 exceeds the upper end surface 13U of the sill 13 and is inside the guide groove 18. It extends to and extends to. As a result, the gap between the upper end surface 13U of the sill 13 and the lower end surface of the door panel 9 formed over substantially the entire length of the lower end surface of the door panel 9 is closed. As shown in FIG. 4, the lower end side of the door shoe bracket 11 does not reach the bottom 18B of the guide groove 18 and faces the bottom 18B with a predetermined gap.

Further, as shown in FIGS. 3 and 4, as one of the important viewpoints of the present embodiment, the door shoe bracket 11 is made by processing a metal, for example, a steel plate into a bent shape, and has a predetermined strength. have. Here, in order to obtain a predetermined strength, the thickness of the steel plate is set to be thicker than that of the steel plate constituting the door panel 9, and preferably the thickness is set to about 1.3 to 2 times, and the strength is set. Has been improved.

Further, since the door shoe bracket 11 is formed in a bent shape that is bent a plurality of times (here, twice) toward the side of the threshold 13, the strength against bending is improved. By making the thickness of the steel plate thicker than that of the door panel 9 and making it a bent shape in this way, the strength of the door shoe bracket 11 can be sufficiently ensured.

As shown in FIGS. 4 and 5, the door shoe bracket 11 is a bracket composed of three bent surfaces.

The door panel mounting surface 11A is a surface fixed to the side surface 9S of the door panel 9 by bolts 10, and a plurality of bolt insertion holes 19 are provided. Further, the door panel receiving surface 11B bent at a right angle to the door panel mounting surface 11A is a surface for receiving the lower end surface 9B of the door panel 9, and is a surface to which the door panel 9 is deformed by thermal expansion.

Further, the sliding surface 11C bent at a right angle to the door panel receiving surface 9B on the side opposite to the door panel mounting surface 9A is a surface that slides in the guide groove 18 of the threshold 13. Here, the door shoe 12 is fixed to the sliding surface 11C so as to sandwich both sides of the sliding surface 11C.

Further, as shown in FIGS. 3 to 5, as one of the important viewpoints of the present embodiment, the door shoe bracket 11 projects downward (in the direction of gravity) to the lower end of the sliding surface 11C on the door stop side. An engaging piece 20 is provided. The engaging piece 20 is firmly fixed to the sliding surface 11C of the door shoe bracket 11 by a fixing means such as welding.

When the door panel 9 is deformed due to a fire or the like, the engaging piece 20 engages with the engaging hole 21 provided in the guide groove 18 of the sill 13 to fix the lower end of the door panel 9 on the door stop side to the sill 13. It has a function. The thickness of the engaging piece 20 is the same as the thickness of the door shoe bracket 11.

As shown in FIG. 6, two engaging holes 21 are formed in the bottom portion 18B of the guide groove 18 of the threshold 13. One engaging hole 20 corresponds to one door panel 9 and the other engaging hole 20 corresponds to the other door panel 9.

Then, with the two door panels 9 closed, the two engaging holes 20 are formed at positions where they can engage with the engaging piece 20 provided at the lower end of the sliding surface 11C of the door shoe bracket 11 on the door stop side. Has been done. The engaging hole 20 can use a "dust removal hole" for sweeping out dust accumulated in the guide groove 18.

Next, based on FIG. 4, the gap distance (g1) between the bottom 18B of the guide groove 18 of the sill 13 and the lower end surface of the sliding surface 11C of the door shoe bracket 11 and the upper end surface 13U of the sill 13 and the door shoe bracket The relationship between the gap distance (g2) between the door panel receiving surface 11B of 11 and the gap distance (g3) between the bottom 18B of the guide groove 18 of the sill 13 and the lower end surface of the engaging piece 20 will be described.

The gap distance (g1), the gap distance (g2), and the gap distance (g3) have a relationship of "g1> g2> g3". That is, when the door panel 9 is deformed by the heat of a fire or the like and the door panel receiving surface 11B of the door shoe bracket 11 moves the gap distance (g2) and comes into contact with the upper end surface 13U of the sill 13, the gap distance (g1). Is longer than the gap distance (g2), so that the bottom portion 18B of the guide groove 18 of the threshold 13 and the lower end surface of the sliding surface 11C of the door shoe bracket 11 do not come into contact with each other and the movement of the door shoe bracket 11 is not hindered.

On the other hand, when the door panel receiving surface 11B of the door shoe bracket 11 moves the gap distance (g2) and comes into contact with the upper end surface 13U of the threshold 13, the gap distance (g3) is shorter than the gap distance (g2). The lower end surface of the sliding surface 11C of the door shoe bracket 11 moves beyond the bottom portion 18B of the guide groove 18 into the engaging hole 21, and as a result, the door shoe bracket is moved through the engaging piece 20. 11 and the threshold 13 are engaged and fixed.

Here, in the present embodiment, the engaging piece 20 and the sliding surface 11C of the door shoe bracket 11 are fixed by welding, but as shown in FIG. 7, they are engaged with the sliding surface 11C of the door shoe bracket 11. The piece 20 can also be integrally formed by punching. According to this, there is an effect that the man-hours for manufacturing the shoe bracket 11 can be reduced.

Next, the operation of the door device on the landing side of the elevator according to the present embodiment during normal times and during a fire will be described.
≪Normal times≫
FIG. 8 shows the relationship between the door panel 9 and the sill 13 in a normal state, and FIG. 9 shows a BB cross section of FIG. Although two door panels 9 are provided, only one door panel 9 is shown because it has the same configuration.

In the normal state, the door panel 9 is in the state shown in FIGS. 8 and 9. That is, since the temperature of the landing hall 7 is the normal temperature (generally the air conditioning temperature), the distance to the lower end edge of the door shoe bracket 11 of the door panel 9 is the height dimension (Lv) as designed. ). In this state, as shown in FIG. 4, the bottom surface 18B of the guide groove 18 of the sill 13 and the lower end surface of the sliding surface 11C of the door shoe bracket 11 have a gap distance (g1), and similarly, the upper end surface 13U of the sill 13 The door panel receiving surface 11B of the door shoe bracket 11 has a gap distance (g2).

Therefore, since the engaging piece 20 does not engage with the engaging hole 21 formed in the bottom 18B of the guide groove 18 of the threshold 13, the door panel 9 is opened and closed according to the movement of the hanger 15 as usual. .. Here, the sliding surface 11C of the door shoe bracket 11 is housed in the guide groove 18 of the threshold 13 as described above.
≪In case of fire≫
Next, FIG. 10 shows the relationship between the door panel 9 and the threshold 13 in a state where a fire has occurred, and FIG. 11 shows a CC cross section of FIG.

When a fire breaks out, the heat of the flame causes the door panel 9 to change to the state shown in FIGS. 10 and 11. That is, when a fire breaks out in the vicinity of the entrance 7B of the landing hall 7 and the door panel 9 is heated by the flame, the door panel 9 is deformed so as to protrude toward the landing hall 7.

This phenomenon is caused by the fact that the surface of the door panel 9 on the landing hall 7 side is rapidly heated by the flame, and conversely, the surface of the door panel 9 on the hoistway side is cooled by the low temperature air in the hoistway. doing. In this way, the door panel 9 is deformed by the temperature difference between the landing hall 7 side and the hoistway side of the door panel 9.

Further, the door panel 9 made of steel plate extends in the longitudinal direction (gravitational direction) due to thermal expansion, but the upper part of the door panel 9 is restrained by the hanger 15, and the lower part of the door shoe bracket 11 is restrained by the guide groove 18 of the threshold 13. Has been done. Therefore, when the door panel 9 extends in the height direction (longitudinal direction) in the height dimension (Lv + ΔLv), the door panel 9 is further deformed so as to project toward the landing hall 7.

Therefore, in this state, the hook of the door lock mechanism (not shown) is engaged with the upper end side of the door panel 9, so that the movement of the door panel 9 in the opening direction is restricted. However, when the lower end side of the door panel 9 is not restrained, if the deformation of the door panel 9 further progresses, the lower end side of the two door panels 9 moves left and right, causing a phenomenon that an opening is generated in the door stop portion.

On the other hand, according to the present embodiment, when the door panel 9 extends like the height dimension (Lv + ΔLv) due to the thermal expansion of the door panel 9, the door shoe bracket 11 also follows this movement and sets the guide groove 18 of the sill 13 to the bottom 18B. Move towards. Then, when the lower end surface of the sliding surface 11C of the door shoe bracket 11 moves beyond the gap distance (g1), the engaging piece 20 fixed to the sliding surface 11C of the door shoe bracket 11 is moved to the guide groove 18 of the threshold 13. It is engaged with the engagement hole 21 formed in the bottom portion 18B.

Therefore, on the upper end side of the door panel 9, the hook of the door lock mechanism is engaged to restrain the movement in the opening direction, and on the lower end side of the door panel 9, the engaging piece 20 of the door shoe bracket 11 engages with the threshold 13. It is engaged with the hole 21 and the movement in the opening direction is restricted.

According to the present embodiment having such a configuration, since the door shoe bracket 11 as shown in FIG. 4 is attached to the lower end side of the door panel 9, the following actions and effects can be obtained.

First, in the event of a fire, the lower end side of the door shoe bracket 11 extends beyond the upper end surface 13U of the threshold 13 to the inside of the guide groove 18. As a result, the gap between the upper end surface 13U of the threshold 13 and the lower end surface of the door panel 9 is closed. Therefore, unlike Patent Document 1, since the door shoe brackets are not separated and arranged apart from each other, a gap is not formed between the lower end surface of the landing side door 8 and the upper end surface 13U of the sill 13, and a flame is formed. It is possible to prevent smoke and smoke from entering the hoistway.

Second, the door shoe bracket 11 is attached to the lower end side of the door panel 9, is long and extends over the entire width of the door panel 9 in the lateral direction, and the thickness of the steel plate is thicker than that of the steel plate constituting the door panel 9. Further, since the door shoe bracket 11 is formed in a bent shape, the overall strength against bending is improved. Therefore, the deformation of the lower end side of the door panel 9 can be reduced, and as a result, a gap is suppressed between the lower end side of the door panel 9 and the upper end surface 13U of the sill 13, and flames and smoke invade the hoistway. You can prevent it from happening. In particular, in the present embodiment, the sliding surface 11C of the door shoe bracket 11, which is formed with a thick steel plate, is housed in the guide groove 18 of the threshold 13 over the entire surface, so that the lower end side of the door panel 9 is further accommodated. Deformation can be reduced.

Thirdly, an engaging piece 20 projecting downward is provided at the lower end of the sliding surface 11C of the door shoe bracket 11 on the door stop side, and the door panel 9 is deformed by thermal expansion of the engaging piece 20 due to a fire or the like. Then, the lower end of the door panel 9 on the door stop side is fixed to the threshold 13 by engaging with the engagement hole 21 provided in the bottom portion 18B of the guide groove 18. Therefore, since the lower end side of the door stop portion of the door panel 9 is deformed in the opening direction and no gap is formed, it is possible to prevent flames and smoke from entering the hoistway.

Further, the above-mentioned actions and effects can be achieved with a single door shoe bracket 11, and the number of parts and man-hours for processing can be reduced, so that the manufacturing cost of the product can be reduced.

Next, a second embodiment of the present invention will be described. FIG. 12 shows a cross section explaining the relationship between the lower end surface of the door and the threshold in normal times, and FIG. 13 shows a cross section explaining the relationship between the lower end surface of the door and the threshold in the event of a fire.

The landing side door device according to the second embodiment basically has the same configuration as that shown in the first embodiment described above. However, as shown in FIG. 12, in addition to the engaging piece 20, an auxiliary engaging piece 22 projecting toward the hoistway side is provided. Correspondingly, in the state where the door panel 9 is closed, the auxiliary engaging hole 23 is provided on the side wall 18S on the hoistway side of the guide groove 18 facing the auxiliary engaging piece 22. Note that FIG. 12 shows a normal state.

Then, when the door panel 9 is heated by the flame of the fire, as shown in FIG. 13, the door panel 9 thermally expands and expands, and at the same time, deforms so as to project toward the landing hall 7. In this state, the engaging piece 20 moves downward and is engaged with the engaging hole 21 according to the initial extension of the door panel 9 as in the first embodiment.

However, for example, depending on the deformation speed and the amount of deformation of the door panel 9 toward the landing hole 7, it is assumed that the engaging piece 20 cannot engage with the engaging hole 21. In this case, in the configuration of the second embodiment, as shown in FIG. 13, the auxiliary engaging piece 22 protruding toward the hoistway side engages with the auxiliary engaging hole 23 formed in the side wall 18S on the hoistway side of the guide groove 18. Since they are combined, the lower end of the door panel 9 on the door stop side can be fixed to the threshold 13. As a result, as in the first embodiment, a gap is not formed due to the lower end side of the door stop portion of the door panel 9 being deformed in the opening direction, so that it is possible to prevent flames and smoke from entering the hoistway. can.

According to such a configuration, when the door panel 9 is deformed due to thermal expansion, the lower end of the door shoe bracket 11 on the door stop side and the sill 13 are engaged with the engaging piece 20 and the engaging hole 21, or the auxiliary engaging piece 22. It can be configured so that it can be engaged with either one of the door shoe bracket 23 and the auxiliary engaging hole 23, and the engagement between the lower end of the door shoe bracket 11 on the door stop side and the threshold 13 can be made more reliable.

As described above, according to the present invention, the lower end of the door panel arranged so as to face the threshold provided with the guide groove on the side facing the hoistway is provided with a length dimension substantially equal to the total width of the door panel in the lateral direction. A door shoe bracket having a predetermined strength is attached, and the lower end side of the door shoe bracket extends so as to be located inside the guide groove of the sill. Further, preferably, an engaging piece is provided at the lower end of the door shoe bracket on the door stop side of the door panel, and when the door panel is in the closed state, the engaging piece engages with the bottom of the guide groove at the position where the engaging piece exists. The configuration is provided with an engaging groove that can be used.

According to this, since a long door shoe bracket having a predetermined strength having substantially the same length as the total width in the lateral direction of the door panel is provided, deformation of the lower end side of the door panel is suppressed and a gap is not formed. It is possible to prevent flames and smoke from entering the hoistway. Further, since the lower end side of the door shoe bracket is located inside the guide groove of the sill, it is possible to prevent flames and smoke from entering the hoistway from between the sill and the door panel.

Further, when the door panel is thermally expanded and deformed due to a fire or the like, the engaging piece engages with the engaging hole provided at the bottom of the guide groove and fixes the lower end of the door panel on the door stop side to the sill. By suppressing the deformation of the lower end side of the door stop portion in the opening direction, a gap is not formed, and it is possible to prevent flames and smoke from entering the hoistway.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described examples have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. It is also possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

2 ... Car, 6 ... Car side door, 7 ... Landing hall, 8 ... Landing side door, 9 ... Door panel, 10 ... Bolt, 11 ... Door shoe bracket, 11A ... Door panel mounting surface, 11B ... Door panel receiving surface, 11C ... Sliding surface, 12 ... door shoe, 13 ... sill, 13U ... upper end surface of sill, 14 ... guide rail, 18 ... guide groove, 18B ... guide groove bottom, 20 ... engagement piece, 21 ... engagement hole.

Claims (10)

An elevator landing-side door device equipped with a landing-side door consisting of a door panel that opens and closes the landing-side entrance / exit of a landing hall provided on the floor of a building.
It is attached to a sill provided with a guide groove provided in the landing hall and the lower end of the door panel arranged so as to face the sill on the side facing the hoistway, and is substantially the same as the total width of the door panel in the lateral direction. An elevator landing that includes a door shoe bracket having a length dimension and a predetermined strength, and the lower end side of the door shoe bracket extends so as to be located inside a guide groove of the threshold. Side door device. In the elevator landing side door device according to claim 1,
An engaging piece is provided at the lower end of the door shoe bracket on the door stop side of the door panel, and when the door panel is in the closed state, the engaging piece is located at the bottom of the guide groove at the position where the engaging piece is present. An elevator landing-side door device, characterized in that an engaging hole is formed in which the door can be engaged. In the elevator landing side door device according to claim 2.
The door shoe bracket is formed of a steel plate, and the thickness of the door shoe bracket is set to be thicker than the thickness of the steel plate constituting the door panel, and is formed in a bent shape bent toward the side of the sill. The door device on the landing side of the elevator, which is characterized by being In the elevator landing side door device according to claim 3.
The bent shape of the door shoe bracket is bent from the door panel mounting surface fixed to the side surface of the door panel, the door panel mounting surface, and the door panel receiving surface that receives the lower end surface of the door panel, and the door panel receiving surface. An elevator landing side door device, which is formed from a sliding surface housed inside the guide groove, and is provided with the engaging piece on the sliding surface. In the elevator landing side door device according to claim 4.
An elevator landing-side door device characterized in that the gap distance between the lower end of the engaging piece and the bottom of the guide groove of the sill is set smaller than the gap distance between the door panel receiving surface and the upper end surface of the sill. .. In the elevator landing side door device according to claim 5.
When the door panel is thermally expanded by the heat of a fire, the engaging piece provided on the sliding surface engages with the engaging hole formed in the bottom of the guide groove of the threshold. Landing side door device. In the elevator landing side door device according to claim 3,
An elevator landing-side door device, wherein the engaging piece is fixed to the lower end of the door shoe bracket by welding or is integrally formed with the door shoe bracket. In the elevator landing side door device according to claim 3,
The door device on the landing side of an elevator, wherein the engaging hole is a dust drop hole formed in the guide groove of the threshold. In the elevator landing side door device according to claim 3.
An auxiliary engaging piece projecting toward the hoistway side is provided at the lower end of the door shoe bracket, and when the door panel is in the closed state, the guide groove at a position where the auxiliary engaging piece is present. An elevator landing-side door device characterized in that an auxiliary engaging hole through which the auxiliary engaging piece can be engaged is formed on a side wall. In the elevator landing side door device according to claim 9.
When the door panel is thermally expanded by the heat of a fire, the auxiliary engaging piece provided on the door shoe bracket engages with the auxiliary engaging hole formed in the side wall of the guide groove of the sill. Door device on the landing side of the elevator.

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