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Title:
CLOSING ARRANGEMENT FOR ELEVATOR LANDING DOOR
Document Type and Number:
WIPO Patent Application WO/2019/058016
Kind Code:
A1
Abstract:
The invention relates to a closing arrangement for an elevator landing door (1), which landing door structure comprises at least a top track (6), a first door panel (4a) suspended by the top track (6), and a closing mechanism (8) arranged to move the door panels (4a, 4b) for closing the landing door (1). The closing mechanism (8) comprises a power storage (9) that is fastened at its first end to the top track (6) and at its second end to move the first door panel (4a).

Inventors:
RÄSÄNEN, Matti (Kartanontie 1, Helsinki, 00330, FI)
HAAPANIEMI, Markku (Kartanontie 1, Helsinki, 00330, FI)
VIITA-AHO, Tarvo (Kartanontie 1, Helsinki, 00330, FI)
HAIKONEN, Aki (Kartanontie 1, Helsinki, 00330, FI)
LINDSTRÖM, Leo (Kartanontie 1, Helsinki, 00330, FI)
Application Number:
FI2017/050668
Publication Date:
March 28, 2019
Filing Date:
September 22, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KONE CORPORATION (Kartanontie 1, Helsinki, 00330, FI)
International Classes:
B66B13/08; E05F1/16
Foreign References:
JPS6013180A1985-01-23
JPS5761060U1982-04-10
US20030221370A12003-12-04
FR2265956A11975-10-24
Attorney, Agent or Firm:
KONE CORPORATION/PATENT DEPARTMENT (P.O.Box 677, Hyvinkää, 05801, FI)
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Claims:
CLAIMS

1. Closing arrangement for an elevator landing door (1), which landing door structure comprises at least a top track (6) , a first door panel (4a) suspended by the top track (6) , and a closing mechanism (8) arranged to move the door panel (4a) for closing the landing door (1), characterized in that the closing mechanism (8) comprises a power storage (9) that is fastened at its first end to the top track (6) and at its second end to move the first door panel (4a) .

2. Closing arrangement for an elevator landing door (1) according to claim 1, characterized in that the power storage (9) has a static part (10a) and a moving part (10b) , and that the static part (10a) of the power storage (9) is fastened at its closed end to the top track (6) with a first fastening element (11), and the moving part (10b) of the power storage (9) is fastened at its free end with a second fastening element (12) to the supporting carriage (5a) of the first door panel (4a) .

3. Closing arrangement for an elevator landing door (1) according to claim 1 or 2, characterized in that the arrangement comprises one or more second door panels (4b) , and the first door panel (4a) is arranged to move the second door panel (4b) .

4. Closing arrangement for an elevator landing door (1) according to claim 1, 2 or 3, characterized in that the power storage (9) is substantially at the upper part of the top track (6) .

5. Closing arrangement for an elevator landing door (1) according to claim 4, characterized in that the power storage (9) is substantially in a horizontal position substantially parallel with the top track (6) .

6. Closing arrangement for an elevator landing door (1) according to any of the claims above, characterized in that the power storage (9) is pre-assembled and pre-adjusted in the manufacturing factory.

7. Closing arrangement for an elevator landing door (1) according to any of the claims above, characterized in that the power storage (9) is a linear actuator. 8. Closing arrangement for an elevator landing door (1) according to claim 7, characterized in that the linear actuator is a gas spring, a pneumatic cylinder, an electric linear actuator equipped with an electric motor, a hydraulic cylinder, or some other properly working actuator that at least automatically closes the landing door (1) .

Description:
CLOSING ARRANGEMENT FOR ELEVATOR LANDING DOOR

The present invention relates to a closing arrangement an elevator landing door as defined later in the preamble claim 1.

In prior art solutions closing arrangements of elevator landing doors are typically based on gravity. In arrangements where gravity is used to close a landing door a weight is typically used as assistance. In that case a proper weight, which is usually guided in a vertical guiding tube is connected to door panels of the landing door for instance with a cable or wire and when the door panels are released from holding the weight pulls the landing door panels so that the door closes. One problem with these kinds of arrangements is that the vertical guiding tube adjacent to a door jamb is an additional component, separated from the top track of the landing door, and its installation requires accuracy and additional installation time. Also it requires its own room in the elevator shaft, which room might be needed for other purposes. Another problem is that the installation of the guiding tube and the weight in the shaft for all the landing doors is not an easy task. In addition, the tube and weight systems often make additional noise.

In other prior art solutions the closing arrangements of elevator landing doors are based on spring forces . In these systems usually rather long spiral springs are used in order to achieve as smooth as possible force to close the panels of the landing doors. These kinds of long spiral springs are also installed in a vertical position, adjacent to a door jamb and separated from the top track, and connected to door panels of the landing door for instance with a cable or wire and when the door panels are released from holding the spring pulls the landing door panels so that the door closes. These arrangements suffer from the same problems as the weight based arrangements mentioned earlier.

One object of the present invention is to eliminate the drawbacks described above and to achieve a reliable and cost-efficient closing arrangement for an elevator landing door. Another object of the present invention is to achieve a closing arrangement for an elevator landing door, which can be pre-assembled and pre-adjusted in a manufacturing factory. In that case no installation time for the door closing arrangement is needed when the landing door is in- stalled. The closing arrangement for an elevator landing door according to the invention is characterized by what is presented in the characterization part of claim 1. Other embodiments of the invention are characterized by what is presented in the other claims.

The inventive content of the application can also be defined differently than in the claims presented below. The inventive content may also consist of several separate inventions, especially if the invention is considered in the light of expressions or implicit sub-tasks or from the point of view of advantages or categories of advantages achieved. In this case, some of the attributes contained in the claims below may be superfluous from the point of view of separate inventive concepts. Likewise, the different details present- ed in connection with each embodiment can also be applied in other embodiments. In addition, it can be stated that at least some of the subordinate claims can, in at least some situations, be deemed to be inventive in their own right.

In order to achieve the objectives mentioned above, the pre- sent invention provides a closing arrangement for an elevator landing door, which landing door structure comprises at least a top track, a first door panel suspended by the top track, and a closing mechanism arranged to move the door panels for closing the landing door. Advantageously the closing mechanism comprises a power storage that is fastened at its first end to the top track and at its second end to move the first door panel.

Preferably the power storage is a linear actuator, such as a gas spring. This kind of power storage is arranged to receive energy from the opening motion of the landing door panels and to release energy for closing the landing door panels. And advantageously, the horizontal position of the power storage is such that the direction of the motion of the moving part is essentially parallel with the direction of the motion of the door panels when they are opening or closing. The power storage could be or comprise also an actuator of another type than a gas spring, for example a pneumatic cylinder, electric linear actuator equipped with an electric motor, hydraulic cylinder, or some other properly working actuator that at least automatically closes the landing door and is capable to accumulate energy from door opening action and release energy for door closing. For example a power storage comprising an electric motor would comprise in addition a battery or other device to accumulate energy from the generative working mode of the electric motor. Due to the losses in storing and releasing of energy an additional energy supply could be associated with the power storage, for example a battery charger could be arranged to maintain suitable working of an electric motor-battery assembly.

The closing arrangement for the elevator landing door according to the invention has the advantage among other things that it saves a lot of work and time when installing landing doors because the door closing mechanism can be pre- assembled and pre-adjusted already in the manufacturing factory. Further advantage is that the closing arrangement according to the invention is cost effective and requires only a little room in an elevator shaft. On more advantage is that the closing arrangement according to the invention is very reliable component that works reliably and whose lifetime is long. Yet one advantage is that the opening and closing force is linear, and the force to the opening direction can be different from the force to the closing direction .

In the following, the invention will be described in detail by the aid of embodiment examples by referring to the attached simplified and diagrammatic drawings, wherein presents in a simplified and diagrammatic oblique top view a landing door according to an advantageous embodiment of the invention in a floor of a building,

presents in a simplified and diagrammatic front view the elevator landing door according to Fig. 1, equipped with the door closing arrangement according to the invention, seen from the elevator shaft, and in the situation where the landing door is closed,

presents in a simplified and diagrammatic front view the elevator landing door according to Fig. 2, equipped with the door closing arrangement according to the invention, seen from the elevator shaft, and in the situation where the landing door is open,

presents in a simplified and diagrammatic front view another advantageous embodiment of the elevator landing door, equipped with the door closing arrangement according to the invention, seen from the elevator shaft, and in the situation where the landing door is closed,

presents in a simplified and diagrammatic front view the elevator landing door according to Fig. 4, equipped with the door closing arrangement according to the invention, seen from the elevator shaft, and in the situation where the landing door is open,

presents in a simplified and diagrammatic top view the elevator landing door according to Fig. 2, equipped with the door closing arrangement according to the invention, in the situation where the landing door is closed,

presents in a simplified and diagrammatic top view the elevator landing door according to Fig. 2, equipped with the door closing arrangement according to the invention, in the situation where the landing door is open,

presents in a simplified and diagrammatic top view the elevator landing door according to Fig. 4, equipped with the door closing arrangement according to the invention, in the situation where the landing door is closed, and

Fig. 9 presents in a simplified and diagrammatic top view the elevator landing door according to Fig. 4, equipped with the door closing arrangement according to the invention, in the situation where the landing door is open. Figure 1 presents in a simplified and diagrammatic oblique top view an installed elevator landing door in a floor of a building, in which the landing door closing arrangement according to the invention can be used. The landing door 1 with its top track 6, door panels 4a and 4b and door sill 7 has been installed into a base door opening 3 formed in a wall 2 of the building, which base door opening 3 opens to the elevator shaft. The type of the landing door is such that the door panels 4a, 4b open to the same first direction and close the same second direction. Thus, the landing door 1 opens from one side.

In the landing door 1 according to Figure 1 the door panels 4a, 4b are suspended from the top track 6 by supporting carriages 5a and 5b of which only the supporting carriage 5b for the second door panel 4b is seen in Figure 1. The other supporting carriage 5a for the first door panel 4a is not very well seen on the other side of the top track 6.

In Figure 1 the landing door installation is not yet com- plete, so the top track 6 is seen above the door panels 4a and 4b, and also a part of the doorsill 7 is seen. The structure of the landing door 1 does not necessarily cover the whole base door opening 3, but the final covering is implemented with covering plates or corresponding structures that are fitted to close all the gaps between edges of the base door opening 3 and the door panels 4a, 4b and other door components both at the sides of the base door opening 3 and above it .

The landing door structure comprises a first door panel 4a that usually has a coupling means for the elevator car door to open and close the first landing door panel 4a at the same time when the elevator car door is opening and closing. In narrow landing door usually the first door panel 4a is sufficient. Thus, the landing door has then only one door panel. In wider landing doors, preferably more than one door panel is used. In those cases the landing door comprises one or more additional door panels, advantageously second door panels 4b that may have no coupling means for the elevator car door to open and close the second landing door panel 4b. In those cases the motion of the second door panel 4b or panels is synchronized with the first door panel 4a, which moves the second door panel 4b or panels.

Figures 2 and 3 present in a simplified and diagrammatic front view the elevator landing door 1 according to Figure 1, equipped with a landing door closing mechanism 8 according to the invention. The landing door 1 is seen from the elevator shaft, and in the situation of Figure 2 the landing door is closed, and in the situation of Figure 3 the landing door is opened to one side of the landing door opening.

The closing mechanism 8 of the landing door 1 comprises at least a power storage 9 that has a static part 10a and a linearly moving part 10b, which when moving changes the active length of the power storage 9. Preferably the power storage 9 is a linear actuator, advantageously a gas spring but it can also be a pneumatic cylinder, electric linear ac- tuator equipped with an electric motor, hydraulic cylinder, or some other properly working actuator that at least automatically closes the landing door. This kind of power storage 9 is arranged to receive energy from the opening motion of the landing door panels 4a, 4b and to release energy for closing the landing door panels 4a, 4b.

In the preferred embodiment of this invention the power storage 9 is preferably a gas spring as mentioned above. The static part 10a of the gas spring is fastened at its closed end to the top track 6 with a first fastening element 11, and the moving part 10b is fastened at its free end with a second fastening element 12 to the supporting carriage 5a of the first door panel 4a. That means that the power storage 9 is fastened at its first end to the top track 5 and at its second end to the supporting carriage 5a of the first door panel 4a, to move the first door panel 4a. Advantageously, the horizontal position of the power storage 9 is such that the direction of the motion of the moving part 10b is essentially parallel with the direction of the motion of the door panels 4a, 4b when they are opening or closing.

The locations of the fastening elements 11 and 12 of the gas spring are so situated that the moving part 10b comes tele- scopically out from the static part 10a when the landing door 1 is opened, and the gas spring lets the door panels 4a, 4b open to their far end. Correspondingly, when the landing door panels 4a, 4b are let to close the gas spring draws the door panels 4a, 4b to the closing position so that the landing door 1 closes. Preferably the gas spring is substantially at the upper part of the top track 6 and is situated substantially in a horizontal position substantially parallel with the top track 6.

The structure of the landing door assembly of Figures 1-3 is such that both the door panels 4a, 4b open to the same first direction and close the same second direction. The landing door 1 comprises a gripping mechanism, preferably in the top track 6, which gripping mechanism is connected with the supporting carriage 5a of the first door panel 4a. When the first door panel 4a is opening or closing the gripping mechanism moves together with the supporting carriage 5a and grips to the supporting carriage 5b of the second door panel 4b. In that case the second door panel 5b opens to the same direction together with the first door panel 4a but with the double speed, so that both the door panels 4a, 4b are totally open substantially at the same time. The same applies when the first door panel 4a is closing. In that case the second door panel is closing to the same direction as the first door panel 4a but with the double speed, so that they both are totally closed substantially at the same time. The gripping mechanism is a customary structure in elevator landing doors and therefore it is not presented in the figures .

Figures 4 and 5 present in a simplified and diagrammatic front view another advantageous embodiment of the elevator landing door, equipped with a landing door closing mechanism 8 according to the invention. The landing door 1 is seen from the elevator shaft, and in the situation of Figure 4 the landing door is closed, and in the situation of Figure 5 the landing door is opened to both sides of the landing door opening . The closing mechanism 8 of the landing door 1 and its location is substantially similar to what is presented above in connection with the description of Figures 2 and 3. In addition, the power storage 9, preferably the gas spring, is fastened to the supporting carriage 5a of the first door panel 4a substantially in the same way as in the structure according to Figures 2 and 3.

The difference between the landing door structure of Figures 2 and 3 compared to the landing door structure of Figures 4 and 5 is that in Figures 2 and 3 the first door panel 4a opens and closes to the same direction compared to the second door panel 4b, and the door panels 4a, 4b open from one side of the door opening. But now, in Figures 4 and 5 both the door panels 4a, 4b open from the middle of the landing door and they open to opposite directions and close to opposite directions.

Because the door panels 4a, 4b move simultaneously to opposite directions the gripping mechanism 13 is now different from the gripping mechanism of the landing door according to Figures 1-3. However, the gripping mechanism 13 itself is a customary structure. The gripping mechanism 13 comprises at least two deflection sheaves 15, one at each end of the top track 6, and a moving element 14 such as a chain or wire that is installed as a closed loop to run over the deflection sheaves 15. Thus, the moving element 14 has an upper part and a lower part that move simultaneously to opposite directions. The first door panel 4a is fastened to the lower part of the moving element 14 with a fastening element 16 and the second door panel 4b is fastened to the upper part of the moving element 14 with a fastening element 17. Thus, the door panels 4a, 4b move simultaneously to opposite directions at the same speed when the landing door 1 is opening or closing. Thanks to the gripping mechanism 13 the second door panel 4b moves when the first door panel 4a is moved by some way, for instance, by an elevator car door in normal situations, by a service person with hands or by the gas spring 9 of the closing mechanism 8.

Figure 6 presents the situation of Figure 2 from top, and Figure 7 presents the situation of Figure 3 from top. Corre- spondingly, Figure 8 presents the situation of Figure 4 from top, and Figure 9 presents the situation of Figure 5 from top .

It is obvious to the person skilled in the art that the in- vention is not restricted to the example described above but that it may be varied within the scope of the claims presented below.