WO2023218258A1 - A roller for an elevator door - Google Patents
A roller for an elevator door Download PDFInfo
- Publication number
- WO2023218258A1 WO2023218258A1 PCT/IB2023/052770 IB2023052770W WO2023218258A1 WO 2023218258 A1 WO2023218258 A1 WO 2023218258A1 IB 2023052770 W IB2023052770 W IB 2023052770W WO 2023218258 A1 WO2023218258 A1 WO 2023218258A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roller
- zamak
- elevator door
- roller body
- rollers
- Prior art date
Links
- 229910000842 Zamak Inorganic materials 0.000 claims abstract description 22
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 239000010974 bronze Substances 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 230000009970 fire resistant effect Effects 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- -1 iron Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/06—Door or gate operation of sliding doors
- B66B13/08—Door or gate operation of sliding doors guided for horizontal movement
Definitions
- the present invention relates to a roller for an elevator door.
- Elevator door leaves usually move guided by special guides that determine their sliding direction.
- the sliding action is facilitated by the presence of wheels (or rollers) fixed on the door that roll on said guide.
- the roller is joined to the door by means of a pin which, through a suitable fastening system, results integral with the door.
- a suitable fastening system Through an appropriate rolling system, ball bearing or bushing, the external part of the wheel is allowed to roll on the guide.
- rollers use different forms of pin so that the assembly of the roller on the support takes place in an optimal way in consideration of the particular type of door.
- rollers involve the use of spacers that compensate for the geometric variations of the door structure.
- Rollers for elevators may differ in dimensions and design depending on the specific use and application.
- Rollers for elevators are also manufactured in metals, such as iron, and preferably coated with Vulkollan ®, that is a polyurethane elastomer.
- Aluminium and bronze may be used in some applications.
- Bronze rollers are heavy and prone to wear in sliding on iron guides.
- bronze rollers are usually provided with felt pads impregnated with oil in order to prevent dust from accumulating on the guides.
- the technical task underlying the present invention is to propose a roller for an elevator door which overcomes the drawbacks in the prior art as described above.
- an object of the present invention is to provide a roller for an elevator door, which is less subject to wear than prior art solutions.
- Another object of the present invention is to provide a roller for an elevator door that is both mechanically resistant and light.
- Another object of the present invention is to make available a roller for an elevator door, which may be manufactured easily and at lower costs.
- Another object of the present invention is to provide a roller for an elevator door, which is fire-resistant, and less noisy.
- a roller for an elevator door comprising a roller body rotatable around a central rotation axis.
- the roller body has an outer groove destined to move along a guide rail.
- the roller body is made of a Zamak alloy.
- the Zamak alloy is chosen amongst: Zamak 12, Zamak 13, Zamak 15.
- the roller body is die-casted.
- the roller body is coated with a layer of polyurethane elastomer.
- the coating layer is made of Vulkollan ®.
- FIG. 1 illustrates a roller for an elevator door, according to the present invention, in a frontal view
- - figure 2 illustrates the roller of figure 1 , in a perspective view
- - figure 3 illustrates the roller of figure 1 , in cross-sectional view according to direction A-A;
- - figures 4 and 5 illustrates different rollers according to the present invention, applied to guide rails.
- number 1 indicates a roller for an elevator door.
- the roller 1 comprises a roller body 2 rotatable around a central rotation axis X.
- the roller body 2 has an outer groove 3 destined to move along a guide rail.
- the roller body 2 has a disk shape with a through hole 4 in a central portion.
- the axis of the through hole 3 is substantially parallel to the central rotation axis X of the roller body 2. More preferably, the two axes are coincident.
- the roller body 2 has the shape of a ring or an annulus having a lateral surface 2a following the circumferential development of annulus.
- the lateral surface 2a of the roller body 2 has an inward portion defining a recess - the outer groove 3 - that follows its circumferential development.
- the outer groove 3 is shaped to partially receive a guide rail 10, as shown in figure 5.
- an upper roller 1 is shown, having two contact points P, Q with the rail 10. When the lateral surface 2a contacts the rail 10 in further contact points, it means that the roller 1 has worn out and shall be replaced.
- the roller body 2 is made of a die-casted alloy.
- the roller body 2 is made of a Zamak alloy.
- Zamak indicates a family of alloys with a base metal of zinc and alloying elements of aluminium, magnesium, and copper.
- Zamak alloys are part of the zinc-allumiunm alloy family. They are distinguished from the other zinc-aluminium alloys because of their constant 4% aluminium composition.
- Zamak comes from the German acronym, where Z stands for Zink (zinc) A for Aluminium, MA for Magnesium, and K for Kupfer, that is German word for copper.
- Zamak alloys have good mechanical properties, in particular they have high wear resistance and high resistance to corrosion.
- Zamak alloys are very ductile and has an excellent performance in being die-casted.
- roller body 2 results in a well-defined shape, with low limits of tolerance.
- elevator rollers made by turning are not so well-defined in their geometric shape.
- upper rollers 1 for elevators have a roller body 2 made of Zamak 12 or Zamak 13 or Zamak 15.
- lower rollers 1 for elevator have a roller body 2 made of Zamak 15.
- the roller 1 has an inner bearing 5, that is already known in the art and will not be futher described.
- Figure 4 illustrates an hybrid mechanism with rollers according to the present invention, but configured for different functions.
- a closing roller 1 a there is a a closing roller 1 a, a sliding roller 1 b, a cut roller 1 c, and a counter roller 1d.
- the use of a Zamak alloy for the roller body results in a mechanically resistant and light roller.
- the roller is fire-resistant and less noisy than the prior art.
- the roller is easily manufactured by die-casting, that results also in well- defined shaped and dimensions.
Abstract
A roller (1) for an elevator door, comprising a roller body (2) that is made of a Zamak alloy.
Description
DESCRIPTION
A ROLLER FOR AN ELEVATOR DOOR
Technical field
The present invention relates to a roller for an elevator door.
Background art
Elevator door leaves usually move guided by special guides that determine their sliding direction.
To minimize friction during movement, the sliding action is facilitated by the presence of wheels (or rollers) fixed on the door that roll on said guide. The roller is joined to the door by means of a pin which, through a suitable fastening system, results integral with the door. Through an appropriate rolling system, ball bearing or bushing, the external part of the wheel is allowed to roll on the guide.
Some rollers use different forms of pin so that the assembly of the roller on the support takes place in an optimal way in consideration of the particular type of door.
Other rollers involve the use of spacers that compensate for the geometric variations of the door structure.
Rollers for elevators may differ in dimensions and design depending on the specific use and application.
There are already known in the elevator field rollers made of plastic material. The main drawback of plastic is that it is likely to wear with heavy panels door.
Rollers for elevators are also manufactured in metals, such as iron, and preferably coated with Vulkollan ®, that is a polyurethane elastomer.
Aluminium and bronze may be used in some applications.
Bronze rollers are heavy and prone to wear in sliding on iron guides. In addition, bronze rollers are usually provided with felt pads impregnated with oil in order to prevent dust from accumulating on the guides.
There is felt the need of rollers that are less likely to wear and are lighter and easier to manufacture with respect to the prior art solutions.
In this context, the technical task underlying the present invention is to propose a roller for an elevator door which overcomes the drawbacks in the prior art as described above.
Disclosure of the invention
In particular, an object of the present invention is to provide a roller for an elevator door, which is less subject to wear than prior art solutions.
Another object of the present invention is to provide a roller for an elevator door that is both mechanically resistant and light.
Another object of the present invention is to make available a roller for an elevator door, which may be manufactured easily and at lower costs.
Another object of the present invention is to provide a roller for an elevator door, which is fire-resistant, and less noisy.
The stated technical task and specified objects are substantially achieved by a roller for an elevator door, the roller comprising a roller body rotatable around a central rotation axis.
The roller body has an outer groove destined to move along a guide rail.
The roller body is made of a Zamak alloy.
In particular, the Zamak alloy is chosen amongst: Zamak 12, Zamak 13, Zamak 15.
In according to one aspect of the invention, the roller body is die-casted.
According to an embodiment of the invention, the roller body is coated with a layer of polyurethane elastomer.
For example, the coating layer is made of Vulkollan ®.
Brief description of drawings
Additional features and advantages of the present invention will become more apparent from the non-limiting, description of a preferred, but nonexclusive embodiment of a roller for an elevator door, as illustrated in the appended drawings, in which:
- figure 1 illustrates a roller for an elevator door, according to the present invention, in a frontal view;
- figure 2 illustrates the roller of figure 1 , in a perspective view;
- figure 3 illustrates the roller of figure 1 , in cross-sectional view according to direction A-A;
- figures 4 and 5 illustrates different rollers according to the present invention, applied to guide rails.
Detailed description of preferred embodiments of the invention
With reference to the figures, number 1 indicates a roller for an elevator door.
The roller 1 comprises a roller body 2 rotatable around a central rotation axis X.
The roller body 2 has an outer groove 3 destined to move along a guide rail.
In particular, the roller body 2 has a disk shape with a through hole 4 in a central portion. Preferably, the axis of the through hole 3 is substantially parallel to the central rotation axis X of the roller body 2. More preferably, the two axes are coincident.
In other words, the roller body 2 has the shape of a ring or an annulus having a lateral surface 2a following the circumferential development of annulus.
The lateral surface 2a of the roller body 2 has an inward portion defining a recess - the outer groove 3 - that follows its circumferential development. The outer groove 3 is shaped to partially receive a guide rail 10, as shown in figure 5. In particular, an upper roller 1 is shown, having two contact points P, Q with the rail 10. When the lateral surface 2a contacts the rail 10 in further contact points, it means that the roller 1 has worn out and shall be replaced.
Advantageously, the roller body 2 is made of a die-casted alloy.
According to a preferred embodiment, the roller body 2 is made of a Zamak alloy.
The word “Zamak” indicates a family of alloys with a base metal of zinc and alloying elements of aluminium, magnesium, and copper.
Zamak alloys are part of the zinc-allumiunm alloy family.
They are distinguished from the other zinc-aluminium alloys because of their constant 4% aluminium composition.
The word “Zamak” comes from the German acronym, where Z stands for Zink (zinc) A for Aluminium, MA for Magnesium, and K for Kupfer, that is German word for copper.
Zamak alloys have good mechanical properties, in particular they have high wear resistance and high resistance to corrosion.
In addition, they are fire-resistant and they may be easily die-casted.
Indeed, Zamak alloys are very ductile and has an excellent performance in being die-casted.
It must be noticed that die-casting manufacturing of the roller body 2 results in a well-defined shape, with low limits of tolerance. On the contrary, elevator rollers made by turning are not so well-defined in their geometric shape.
In one embodiment, upper rollers 1 for elevators have a roller body 2 made of Zamak 12 or Zamak 13 or Zamak 15.
In one embodiment, lower rollers 1 for elevator have a roller body 2 made of Zamak 15.
Preferably, the roller 1 has an inner bearing 5, that is already known in the art and will not be futher described.
Figure 4 illustrates an hybrid mechanism with rollers according to the present invention, but configured for different functions.
In particular, there is a a closing roller 1 a, a sliding roller 1 b, a cut roller 1 c, and a counter roller 1d.
The characteristics of the roller for an elevator door, according to the present invention, emerge clearly from the above description, as do the advantages.
In particular, the use of a Zamak alloy for the roller body results in a mechanically resistant and light roller. In addition, the roller is fire-resistant and less noisy than the prior art.
The roller is easily manufactured by die-casting, that results also in well-
defined shaped and dimensions.
Claims
1 . A roller (1 ) for an elevator door, said roller (1 ) comprising: a roller body (2) rotatable around a central rotation axis (X), said roller body (2) having an outer groove (3) destined to move along a guide rail, characterized in that the roller body (2) is made of a Zamak alloy.
2. The roller (1 ) according to claim 1 , wherein the roller body (1 ) is coated with a layer of polyurethane elastomer.
3. The roller (1 ) according to claim 2, wherein said layer is made of Vulkollan ®.
4. The roller (1 ) according to any one of the preceding claims, wherein the roller body (2) is die-casted.
5. The roller (1 ) according to any one of the preceding claims, wherein the Zamak alloy is chosen amongst: Zamak 12, Zamak 13, Zamak 15.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102022000009647 | 2022-05-10 | ||
| IT102022000009647A IT202200009647A1 (en) | 2022-05-10 | 2022-05-10 | A WHEEL FOR AN ELEVATOR DOOR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023218258A1 true WO2023218258A1 (en) | 2023-11-16 |
Family
ID=82385636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2023/052770 WO2023218258A1 (en) | 2022-05-10 | 2023-03-21 | A roller for an elevator door |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | IT202200009647A1 (en) |
| WO (1) | WO2023218258A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB647141A (en) * | 1947-07-07 | 1950-12-06 | Robert Mawby | Improvements in and relating to the manufacture of rubber-tyred wheels, buffers or other articles having a peripheral cushioning ring or arc |
| EP0838570A2 (en) * | 1996-10-25 | 1998-04-29 | C. HAUSHAHN GmbH & Co. | Device for slidingly supporting elevator door leaves |
| CN110510490A (en) * | 2019-09-24 | 2019-11-29 | 扬州大学 | A kind of special combined idler wheel of elevator, idler wheel processing unit (plant) and idler wheel processing method that can be used in large temperature range |
| US20210115718A1 (en) * | 2018-04-06 | 2021-04-22 | Terno Scorrevoli S.P.A. Unipersonale | Carriage with elastic compensation elements for moving sliding doors |
-
2022
- 2022-05-10 IT IT102022000009647A patent/IT202200009647A1/en unknown
-
2023
- 2023-03-21 WO PCT/IB2023/052770 patent/WO2023218258A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB647141A (en) * | 1947-07-07 | 1950-12-06 | Robert Mawby | Improvements in and relating to the manufacture of rubber-tyred wheels, buffers or other articles having a peripheral cushioning ring or arc |
| EP0838570A2 (en) * | 1996-10-25 | 1998-04-29 | C. HAUSHAHN GmbH & Co. | Device for slidingly supporting elevator door leaves |
| US20210115718A1 (en) * | 2018-04-06 | 2021-04-22 | Terno Scorrevoli S.P.A. Unipersonale | Carriage with elastic compensation elements for moving sliding doors |
| CN110510490A (en) * | 2019-09-24 | 2019-11-29 | 扬州大学 | A kind of special combined idler wheel of elevator, idler wheel processing unit (plant) and idler wheel processing method that can be used in large temperature range |
Also Published As
| Publication number | Publication date |
|---|---|
| IT202200009647A1 (en) | 2023-11-10 |
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