EP4359337A1

EP4359337A1 - Roller guide shoe for guiding an elevator cab of an elevator

Info

Publication number: EP4359337A1
Application number: EP22734319.1A
Authority: EP
Inventors: Romeo LO JACONO; Volker Zapf; Alessandro D'apice
Original assignee: Inventio AG
Current assignee: Inventio AG
Priority date: 2021-06-25
Filing date: 2022-06-23
Publication date: 2024-05-01
Also published as: CN117545707A; WO2022268949A1

Abstract

Disclosed is an elevator (10) comprising an elevator cab (2) which is guided on two opposite guide rails (3). The guide rails (3) each contain a U-shaped guide channel (11) having a front guide face (12) and lateral guide faces (13). In order to guide an elevator cab (2), roller guide shoes (1) are provided which each comprise two running rollers (4, 5) mounted on a common axis (19) so as to rotate freely about an axis of rotation (R1) for guidance along the front guide face (12) of the U-shaped guide channel (11) and a guide roller (6) that can be accommodated for the lateral guidance between lateral guide faces (13) of the U-shaped guide channel (11). Covers (15) for covering the respective running rollers (4, 5) are mounted upstream of the running rollers (4, 5), wherein the covers (15) form an emergency guide (14).

Description

ROLLER GUIDE SHOE FOR GUIDING AN ELEVATOR CAR

OF AN ELEVATOR

The invention relates to a roller guide shoe according to the preamble of claim 1. The invention also relates to an elevator whose elevator car is equipped with such roller guide shoes.

Elevators for transporting people and goods contain elevator cars that can be moved up and down an elevator shaft. The elevator cars can be moved by means of a drive unit in the vertical elevator shaft via suspension means, for example in the form of suspension ropes or suspension belts. In addition to the elevator car, the elevator installation generally includes at least one counterweight, which is moved in opposite directions in the elevator shaft. The elevator car and the at least one counter weight run in guide rails. Guide shoes are usually used to guide elevator cars and counterweights, and the guide shoes can be designed as sliding guide shoes or roller guide shoes.

To ensure that the elevator car is guided linearly with sufficient precision, guide rails are used that are fixed in the elevator shaft. T-shaped metal profiles have been known and used for a long time. The T-profile has a rail foot attached to a shaft wall and a rail web. The web of rails has two guide surfaces lying opposite one another and a guide surface on the end face, along which a sliding or roller guide shoe can be moved in a sliding or rolling manner. In addition to the guiding function, the guide surfaces of the rail web also serve as contact surfaces for safety devices with which elevator cars can be braked for a car stop. The safety device can also be a safety brake to catch the cabin. The guide rail designed as a T-profile has proven itself for many years.

However, guide rails for guiding elevator cars are also known, which include a U-shaped guide channel. Such a guide rail has become known, for example, from WO 2020/127787 A1. This guide rail contains guide contours for both the elevator car and the counterweight in the same component. The guide contour for the elevator car is designed as a U-shaped guide tion channel designed. The elevator car has guide shoes that are accommodated in the U-shaped or groove-like guide channel of the elevator rail.

It is an object of the present invention to avoid the disadvantages of the known and in particular to create a roller guide shoe with which the elevator cabine can be guided safely and reliably. Furthermore, the roller guide shoe should also enable a high level of driving comfort.

According to the invention, these and other objects are achieved with a roller guide shoe according to the features of claim 1. The roller guide shoe for an elevator for transporting people or goods is used to guide an elevator car along a guide rail that extends in the direction of travel or longitudinal direction. The Füh guide rail has a U-shaped guide channel for receiving the roller guide shoe. The U-shaped guide channel can have two mutually opposite lateral guide surfaces and a frontal guide surface connecting them to one another, the lateral guide surfaces and the frontal guide surface defining a “U” in cross section. The lateral guide surfaces are preferably at right angles to the front guide surface. The two opposite lateral guide surfaces may extend along a first direction with respect to the cross-section. The frontal guiding surface can extend along a second direction in cross-section. The two directions, i.e. the first direction on the one hand and the second direction on the other hand, can be at right angles to each other in a rectangular "U".

The roller guide shoe comprises two running rollers, which are freely rotatably mounted on a common axis about a rotation axis and are preferably spaced apart from one another via the axis, for guiding along the frontal guide surface. The rollers can run on the front guide surface when driving the cabin. The two rollers grouped in pairs ensure optimal frontal guidance of the elevator car. The Laufrol len can preferably be freely rotatably mounted or attached opposite each other at the free ends of the axle. For lateral guidance, the roller guide shoe includes a guide body that can be accommodated between the lateral guide surfaces. The guide body is preferably guided in an oscillating manner between the lateral guide surfaces when the car is traveling. The guide body thus makes contact not both lateral guide surfaces at the same time.

According to a first embodiment, the guide body can be a guide roller, the roller axis of which runs at right angles to the axis of the two rollers (or, more precisely, to the axis of rotation of said axis). The axis of rotation of the rollers can run in the aforementioned first direction; the roller axis of the guide roller can run in the aforementioned second direction.

For optimal guidance, it can be advantageous if the guide roller is at least 50% larger and preferably at least twice as large in relation to the outer diameter of the rollers.

It can also be advantageous if the rollers are spaced far enough from one another that they reach close to the outer diameter of the guide roller—seen in a vertical projection or one predetermined by the longitudinal direction. If another guide body is used instead of the guide roller, for example a carriage-like guide body to enable sliding guidance, the rollers would reach the outside dimensions of this alternative guide body. In this context, close means preferably a few mm.

The roller guide shoe can have an emergency guide. Thanks to the emergency guide, it is ensured that a guide function is maintained even if one or more rollers are lost, for example as a result of bearing damage.

The roller guide shoe can be equipped with a panel to cover the rollers. For advantageous covering of the rollers, the screen can be arranged in front of the rollers in front of the roller guide shoe. Particularly preferably, each roller can be assigned a screen. The panel, which partially covers the respective roller on the catch side, prevents unwanted contamination of the roller, in particular by dirt particles falling from above. In this case, the screen can be arranged on a front side or, in the installed state, on an upper side in the roller guide shoe.

Particularly advantageous forms the panel or panels form the emergency guide, which a particularly effective and compact roller guide shoe is available.

The roller guide shoe can have a guide shoe housing with a support section for supporting the rollers and/or the guide body and with a fastening section for fastening the roller guide shoe to the elevator car. In this case, the support section and the fastening section can be at right angles to one another. The support section is designed to be flat or has a surface, which surface (also called “support surface”) defines a plane. In the preferred exemplary embodiment, the axis or axis of rotation of the running rollers runs parallel to this support surface, the roller axis of the guide roller runs at right angles to the support surface. Likewise, the attachment section can be configured flat.

The carrier section and the fastening section can preferably be part of an integral structure and thus be monolithically connected to one another. This integral structure for forming the guide shoe housing can be made of a high-strength plastic, for example in the form of an injection molded part. Alternatively, it can be advantageous if the guide shoe housing, comprising the support section and the fastening section, is made from a single sheet metal blank which is erected from a flat position into an end position by means of bending or folding processes. Such a roller guide shoe can be produced easily and inexpensively.

The panels and/or the emergency guide can be formed by sheet metal segments that are part(s) of the guide shoe housing made from a sheet metal blank.

Alternatively, the guide shoe housing can be designed in two parts, the two-part guide shoe housing having a base part comprising fastening section and carrier section as the first part and as the second part a carrier part attached to the base part in the carrier section. The emergency guide can be assigned to the carrier part. The carrier part can be made from a single sheet metal blank. The emergency guide can be formed by folding the sheet metal blank. The carrier part can thus have been erected from a flat position into an end position by means of bending or edging processes. An extension piece with a hook-like engagement element cooperating with a web-like projection of the guide rail or with another guide section of the guide rail forming a spring can be formed or fastened on the fastening section to form a protection against derailment. This web-like projection can form a braking section of the guide rail. In this guide rail, the guide section and the braking section are locally separated from one another.

Finally, a further aspect of the invention relates to an elevator with an elevator car which is equipped with the previously described roller guide shoes for guiding the elevator car on guide rails. The elevator further comprises two guide rails, preferably opposite one another, for guiding the elevator car, the guide rails extending in the longitudinal direction each containing a U-shaped guide channel.

The elevator with the elevator car can also have at least one counterweight which is connected to the elevator car via suspension means and can be moved in the opposite direction to the elevator car. The elevator can preferably have one counterweight or two counterweights for each elevator car. The elevator can include guide rails, each of which serves as a linear guide both for an elevator car and for a counterweight.

The elevator car can have a front side that is assigned a car door. Furthermore, the elevator car can have a rear side opposite the front side and two car sides connecting the front side and rear side to each other. The elevator can, for example, comprise an elevator car supported at the front and two opposing counterweights which are each connected to the elevator car via suspension means and can be moved in opposite directions to the elevator car. The counterweights can be guided on opposite counterweight guide rails, which counterweight guide rails are attached to opposite sides of the elevator shaft adjacent to the car sides. The guide rail for guiding the elevator car and the counterweight guide rail are formed by a common guide rail profile on each side. This guide rail thus serves as a linear guide both for the cab and for the counterweights. Such an elevator with the front side from supported elevator car is also known under the name "front bag elevator".

Further individual features and advantages of the invention result from the following description of exemplary embodiments and from the drawings. Show it:

1 shows a greatly simplified representation of a top view of an elevator according to the invention with an elevator car which is equipped with roller guide shoes for guiding the elevator car along guide rails extending in the catching direction,

2 shows a perspective partial view of an elevator car with a roller guide shoe and an associated guide rail,

Fig. 3 is a perspective view of the roller guide shoe for the elevator of Fig. 2,

Fig. 4 is a perspective view of the roller guide shoe in a rear view, and

5 shows a variant of the roller guide shoe according to FIG.

Fig. 1 shows an elevator, designated 10, for a multi-storey building. The building has an elevator shaft 22 in which an elevator car 2 can be moved vertically up and down to individual floors for transporting people or goods.

The elevator in FIG. 1 is designed as a traction elevator system with at least one counterweight 23 that can be moved in the opposite direction to the elevator car 2 . The train 10 shown here has two counterweights 23 and (not shown) support means and drives. The two drives (e.g. traction sheave drives) drive the respective suspension means (e.g. belts, steel cables) and thus move the elevator car 2 and the two counterweights 23 in opposite directions. Each drive is assigned to one of the counterweights 23 orderly. To guide the elevator car 2 and the counterweights 23 , two opposite guide rails 3 are provided on both sides of the elevator car 2 . The elevator 10 shown in the present exemplary embodiment is characterized by special guide rails 3, which serve as linear guides for both the elevator car 2 and the respective counterweights 23. The guide rails 3 can be manufactured as one-piece rolling profiles.

The elevator car 2 has a front 24 with a car door 27, a rear 26 opposite the front and two side walls 25 connecting the front and rear to one another. The elevator car 2 is supported at the front. The guide rails 3 are located on opposite sides of the elevator shaft 22 adjacent to the side walls 25. The guide rails 3 are fixed to the elevator shaft 22 by horizontal support structures 29 in the region of the front side of the elevator shaft. Elevator system 1 is designed as a so-called "front bag elevator". Further details on the front bag lift and the guidance of the cabin and the counterweights with common guide rails can be found in WO 2020/127303 A1 and WO 2020/127787 A1.

The guide rail 3 comprises a U-shaped guide channel 11 in which a roller guide shoe 1 for guiding the elevator car 2 is accommodated. The roller guide shoe 1 has two rollers 4, 5 for the end-side guidance and an Füh guide roller 6 for lateral guidance. The respective axes of rotation of the rollers 4, 5 and the guide roller 6 are denoted by RI and R2. Details on the structure and func ons of the roller guide shoe 1 are from the following Figures 2 to 5 ent removable.

It can also be seen in FIG. 1 that the respective counterweight 23 is guided along the guide rail 3 by means of guide arrangements which are only indicated in outline. A safety device is denoted by 20 . The safety device 20 can also be a safety brake to catch the cabin. The safety brake is a device that prevents the elevator car from overspeeding in the downward direction. Are known, for example, solutions with safety wedges that can be taken actuator should by Kraftfedem. The power springs are preloaded by an electromagnet and the preloaded power springs are released when necessary. The security However, direction 20 could be a car brake. With the car brake, the elevator car can be secured when the car stops. To catch or brake the elevator car 2, the safety device 20 interacts with a web-like projection 21 of the guide rail 3.

FIG. 2 shows a roller guide shoe 1 which is arranged on the elevator car 2 in the area of the car floor 28 . The direction of travel of the elevator car 2 is indicated with an arrow z. The guide rail 3 shown in dashed lines is evidently designed as a hollow profile, with the guide rail 3 being manufactured as a one-piece roll profile in the present exemplary embodiment. The guide channel 11 has two lateral guide surfaces 13 lying opposite one another and a frontal guide surface 12 connecting them to one another. The front guide surface 12 and the lateral guide surfaces 13 adjoining it at right angles define a “U” in cross section. The rollers 4, 5 run on the front guide surface 12. The guide roller 6 is guided in an oscillating manner between the lateral guide surfaces 13. The roller axis R2 runs at right angles to the axis of rotation RI of the two rollers 4, 5.

The two rollers 4, 5 are freely rotatably mounted on a common axis 19. The rollers 4, 5, which are spaced apart from one another via the axis 19, enable front-end guidance which is characterized, among other things, by a high degree of reliability and enables improved driving comfort.

As can be seen from FIG. 3, for example, the guide roller 6 has a significantly larger outside diameter than the rollers 4, 5. In the present case, the outer diameter of the guide roller 6 is approximately twice as large as that of the rollers 4, 5. De rollers 4, 5 are spaced apart so that they are close to the outer diameter of the guide roller 6 rich.

The roller guide shoe 1 has a guide shoe housing 7 with a carrier section 8 and a fastening section 9 projecting away from it at right angles. The carrier section 8 serves to carry the rollers 4, 5 and the guide roller 6. The fastening section 9 serves to fasten the roller guide shoe 1 to the elevator cabin 2. The guide shoe housing 7 with the carrier section 8 and fastening section 9 has an L-shape. Thanks to the L-shape, the roller guide shoe 1 can be placed on the edge between the horizontal underside of the cabin floor 28 and the vertical outside of the cabin wall 25 and fasten to the elevator cabin 2 with screws 30.

Further details of this roller guide shoe 1 can be found in FIGS. The guide shoe housing 7 with the carrier section 8 and the fastening section 9 is made from a single sheet metal blank, which is erected from a flat position into the end position shown here by means of bending or folding processes. The flat support section 8 defines a support surface. The axis of rotation RI of the rollers 4, 5 runs parallel to this support surface, the roller axis R2 of the guide roller runs at right angles to the support surface of the support section 8. The roller guide shoe 1 also includes an emergency guide 14, which is part of the guide shoe housing 7 made from a sheet metal blank. The emergency guide 14 can be formed simply by corre sponding cutting operations when bending the sheet metal blank. The emergency guide 14 has two screens 15 for partially covering the rollers 4, 5, each screen 15 being positioned in front of a roller 4, 5 in each case. At the attachment section 9, an extension piece 31 is attached. This extension piece 31 has a hook-like engagement member 18 which acts together with the web-like projection 21 forming a spring of the guide rail 3 to form a protection against derailment. The hook-like engagement member 18 surrounds the guide rail 3 in the area of the projection 21 and thus ensures that derailment can be prevented, for example in the event of an earthquake.

FIG. 5 shows a variant of a roller guide shoe 1 in which the guide shoe housing 7 is designed in two parts. The two-part guide shoe housing 7 has a base part 16 formed from sheet metal with a fastening section 8 and a sheet metal section formed thereon at a right angle, on which a second part is arranged. The second part forms a carrier part 17, carrier section 8, to which the carrier section 8 for carrying the rollers 4, 5 and the guide rollers 6 is assigned. The carrier part 17 has a fold that forms the emergency guide 14 . Another difference between the roller guide shoe 1 of the exemplary embodiment according to FIG. 5 and the previous exemplary embodiment is a different arrangement of the guide roller 6 and the rollers 4, 5. In FIG End of the support section 8 arranged. The roller guide shoes 1 shown in FIGS. 3 to 5 do not necessarily have to be used only in front bag elevators, but can also be used in other elevators in which the elevator cars are guided on guide rails with U-shaped guide channels.

Claims

patent claims

1. Roller guide shoe (1) for guiding an elevator car (2) of an elevator (10) along a longitudinally (z) extending guide rail (3) comprising a U-shaped guide channel (11), the roller guide shoe (1).

- two rollers (4, 5) mounted on a common axis (19) so as to be freely rotatable about an axis of rotation (RI) for guiding along a frontal guide surface (12) of the U-shaped guide channel (11), and

- A guide body, the approximately surfaces for lateral guidance between lateral Füh (13) of the U-shaped guide channel (11) can be accommodated.

2. Roller guide shoe (1) according to claim 1, characterized in that the guide body is a guide roller (6) whose roller axis (R2) is perpendicular to the axis of rotation (RI) of the two rollers (4, 5).

3. Roller guide shoe (1) according to claim 2, characterized in that the guide roller (6) compared to the rollers (4, 5) with respect to the outer diameter is at least 50% larger and preferably at least twice as large.

4. roller guide shoe (1) according to any one of claims 1 to 3, characterized in that the rollers (4, 5) is preceded by a screen (15) for covering the respec gene rollers (4, 5).

5. Roller guide shoe (1) according to claim 4, characterized in that the screen (15) forms an emergency guide (14).

6. roller guide shoe (1) according to any one of claims 1 to 5, characterized in that the roller guide shoe (1) has a guide shoe housing (7) with egg nem support section (8) for supporting the rollers (4, 5) and / or the Füh tion body (6) and a fastening section (9) for fastening the roller guide shoe (1) to the elevator car (2), the carrier section (8) and the fastening section (9) at right angles to each other duri fen.

7. roller guide shoe (1) according to claim 6, characterized in that the guide shoe housing (7) comprising support portion (8) and Befestigungsab section (9) is made of a single sheet metal blank.

8. roller guide shoe (1) according to any one of claims 4 or 5 and claim 7, characterized in that the panels (15) are formed by sheet metal segments, which is part (s) of the guide shoe housing (7) made from a sheet metal blank.

9. Roller guide shoe (1) according to one of Claims 6 to 8, characterized in that on the fastening section (9) there is an extension piece (31) with a hook-like engagement element (18) which acts together with a profile section (21) forming a spring Forming a derailment protection is formed or attached.

10. Elevator (10) with an elevator car (2) and two guide rails (3) for guiding the elevator car (2), wherein the guide rails (3) extending in the longitudinal direction (z) each contain a U-shaped guide channel (11), wherein the elevator car (2) is equipped with roller guide shoes (1) according to one of claims 1 to 9 for guiding the elevator car on the guide rails (3).