Roller and sliding system for door leaf of elevator

Abstract

A roller (1) for a door leaf of an elevator, comprising: a disc-shaped body (2) rotatable about a central rotation axis (A-A); and a first connection portion (3a) and a second connection portion (3b) located on opposite sides (2a, 2b) of the disc-shaped body (2) and intended to be selectively connected to a door leaf of the elevator, the sizes of the first and second connection portions (3a, 3b) being different from each other.

Description

Technical Field

[0001] The invention relates to a roller and sliding system for a door leaf of an elevator. Background Art

[0002] Elevator door leaves are usually guided by special guide rails, which determine the direction of their sliding.

[0003] To minimize friction during movement, the sliding action is facilitated by wheels (or rollers) fixed to the door, which roll on the said guide rails. The rollers are connected to the door by pins and, through a suitable fastening system, become integral with the door. The outer part of the wheel is allowed to roll on the guide rails through a suitable rolling system, ball bearings or bushings.

[0004] In order to use the same roller on different doors, some solutions representing the prior art are used.

[0005] Some rollers envisage the use of different connection means in order to assemble the roller to the bracket in the best way according to the specific type of door.

[0006] Other rollers involve the use of shims to compensate for geometric variations in the door structure.

[0007] A roller that fits different door styles is needed to unify the production process and improve standardization. Summary of the invention

[0008] In this context, the technical task of the present invention is to propose a roller and sliding system for a door leaf of an elevator to overcome the above-mentioned shortcomings of the prior art.

[0009] In particular, the object of the invention is to provide a roller for a door leaf of an elevator which can be adapted to different door types.

[0010] Another object of the invention is to provide a roller for a door leaf of an elevator which is an alternative to the known solutions.

[0011] The aforementioned technical tasks and specific objects are generally achieved by a roller for a door leaf of an elevator, the roller for a door leaf of an elevator comprising:

[0012] a disc-shaped body rotatable about a central rotation axis;

[0013] A first connecting portion and a second connecting portion are located on opposite sides of the disc-shaped body and are used for selective connection to a door leaf of the elevator.

[0014] The first connection portion and the second connection portion are different in size from each other.

[0015] According to one embodiment, the first connection portion and the second connection portion have a cylindrical shape and they have different diameters.

[0016] According to one embodiment, the first connecting portion and / or the second connecting portion has a side surface formed by a part-cylindrical surface and at least one flat surface.

[0017] According to one embodiment, the disc-shaped body comprises a support body on which the first connection portion and the second connection portion are obtained at two opposite sides.

[0018] According to one embodiment, the support body has an elongated extension along a direction substantially parallel to the central rotation axis between a first end and a second end located on opposite sides of the disc-shaped body. The first end and the second end represent a first connection portion and a second connection portion.

[0019] According to one embodiment, the disc-shaped body comprises a seat as a through hole, in which the support body fits.

[0020] According to one embodiment, the first connecting portion and the second connecting portion are obtained by directly forming the disc-shaped body.

[0021] According to one embodiment, the roller comprises a through hole in a disc-shaped body and a pin detachably mounted in said through hole. The first connection portion is located on the disc-shaped body and the second connection portion is located on the pin.

[0022] According to one embodiment, the end of the pin protrudes from the through hole on the opposite side with respect to the first connection part and is shaped so as to realize the second connection part. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features and advantages of the present invention will become more apparent from the non-limiting description of a preferred but non-exclusive embodiment of a roller and sliding system for a door leaf of an elevator, shown in the accompanying drawings, in which:

[0024] Figure 1a , Figure 1b Two perspective views of a first embodiment of a roller for a door leaf of an elevator according to the invention, taken from two opposite sides respectively;

[0025] Figure 2a is from Figure 1a A front view of the roller taken from the side;

[0026] Figure 2b is from Figure 1b A front view of the roller taken from the side;

[0027] Figure 3 yes Figure 1a , Figure 1b The cross section of the roller;

[0028] Figure 4a , Figure 4bshow two perspective views of a second embodiment of a roller in a first configuration (without pins), taken from two opposite sides respectively;

[0029] Figure 5 yes Figure 4a , Figure 4b The cross section of the roller;

[0030] Figure 6 A sliding system according to the invention is shown, wherein Figure 4a , Figure 4b The roller in is fixed to the carriage;

[0031] Figure 7 shows the pin at Figure 4a , Figure 4b Installation of rollers in the

[0032] Figure 8a , Figure 8b show two perspective views of a second embodiment of a roller in a second configuration (with pins), taken from two opposite sides respectively;

[0033] Fig. 9 yes Figure 8a , Figure 8b The cross section of the roller in;

[0034] Fig.10 A sliding system according to the invention is shown, wherein Figure 8a , Figure 8b The rollers in the slide are fixed to different slides. DETAILED DESCRIPTION

[0035] Referring to the drawings, numeral 1 denotes a roller for a door leaf of an elevator.

[0036] The roller 1 comprises a disc-shaped body 2 rotatable about a central rotation axis AA.

[0037] The roller 1 advantageously comprises a first connection portion 3a and a second connection portion 3b, which are situated on opposite sides of the disc-shaped body 2. Opposite sides means relative to the central axis of rotation AA.

[0038] Specifically, the first connection portion 3 a is located on the first side 2 a of the disc-shaped body 2 , and the second connection portion 3 b is located on the second side 2 b of the disc-shaped body 2 .

[0039] The first side 2a and the second side 2b of the disc-shaped body 2 are lateral sides with regard to the direction of movement of the roller 1 in the operating state.

[0040] Preferably, the two connecting portions 3 a , 3 b protrude outwardly from respective sides 2 a , 2 b of the disc-shaped body 2 .

[0041] The two connecting parts 3a, 3b have different sizes. In other words, the cross section of one connecting part 3a and the cross section of the other connecting part 3b have different areas.

[0042] Preferably, the shapes of the two connecting parts 3a, 3b are also different.

[0043] Preferably, the first connection portion 3a and the second connection portion 3b have a cylindrical shape. In this case, they have different diameters.

[0044] The two connecting parts 3a, 3b are selectively used to connect the roller 1 to a sliding frame (or carriage). The sliding frame connects the door leaf of the elevator to the roller 1 so that the door leaf can slide.

[0045] According to the invention, only one connection part 3a, 3b is used at a time to connect the roller 1 to the carriage. The connection part 3a, 3b to be used is selected according to the style of the carriage (or carriage) to which the roller 1 is to be connected. In fact, the shape of the first connection part 3a and the second connection part 3b is selected to match different types of carriages.

[0046] according to Figure 1a , Figure 1b In the first embodiment shown, the disc-shaped body 2 comprises a support 4 on which the first connecting portion 3a and the second connecting portion 3b are obtained.

[0047] According to one embodiment, the supports 4 are mounted in corresponding seats 5 in the disc-shaped body 2. Preferably, the seats 5 are through holes.

[0048] The support body 4 has an elongated extension in a direction substantially parallel to the central rotation axis AA between a first end 4a and a second end 4b located on opposite sides 2a, 2b of the disc-shaped body 2. Specifically, the first end 4a is located on the first side 2a of the disc-shaped body 2, and the second end 4b is located on the second side 2b of the disc-shaped body 2.

[0049] Specifically, the first end 4a and the second end 4b of the support body 4 are the first connection portion 3a and the second connection portion 3b.

[0050] When the seat 5 is a through hole, the seat 5 has an elongated extension along a direction substantially parallel to the central rotation axis AA. Preferably, the direction of the seat 5 coincides with the central rotation axis AA.

[0051] Preferably, the first connection part 3a and the second connection part 3b have side surfaces formed by a part cylindrical surface 6 and at least one flat surface 7. The flat surface 7 acts as an anti-rotation system when fixing the roller 1 to the roller support of the door. It avoids the use of a second tool to fix the roller, making it easier and faster.

[0052] Preferably, the plane 7 extends in a plane parallel to the central axis of rotation AA.

[0053] According to one embodiment, the support body 4 is made in one piece with the disc-shaped body 2 .

[0054] According to one embodiment shown in the figures, the first connecting portion 3a has a side surface formed by a part-cylindrical surface 6a and a plane 7a. Considering a cross section of the first connecting portion 3a, i.e. a cross section orthogonal to the central axis of rotation AA, a closed curve formed by an arc of a circle is observed, the two ends of which are connected by a substantially straight line (also called a "circular segment"). This is Figure 2a Shown in.

[0055] Preferably, the second connection portion 3b has a side surface formed by connecting two flat surfaces 7b with two surfaces 6b that are partially cylindrical.

[0056] In this case, considering the cross section of the second connecting portion 3b, a closed curve consisting of a first circular arc, a first straight line (or a first circular segment), a second circular arc, and a second straight line (or a second circular segment) is observed in sequence. Figure 2b Shown in.

[0057] Preferably, the two flat surfaces 7b of the second connecting portion 3b extend in a plane parallel to the central rotation axis AA.

[0058] According to one embodiment, the two flat surfaces 7b of the second connecting portion 3b have substantially the same area.

[0059] According to one embodiment, all planes 7a, 7b have substantially the same area.

[0060] According to one embodiment, the two flat surfaces 7b of the second connecting portion 3b are located at opposite sides with respect to the central rotation axis AA.

[0061] Preferably, one of the plane 7 a of the first connecting portion 3 a and the plane 7 b of the second connecting portion 3 b is symmetrical with respect to the disc-shaped body 2 .

[0062] According to one embodiment, the support body 4 comprises a cross-sectional enlargement 8 which abuts against the disc-shaped body 2 .

[0063] In particular, the cross-sectional enlargement 8 is located on the first side 2a of the disc-shaped body 2. The first connecting portion 3a originates from the cross-sectional enlargement 8 and extends away therefrom.

[0064] The cross-sectional expansion portion 8 protrudes from the through hole 5 on the first side 2 a , thereby preventing the support body 4 from being decoupled from the through hole 5 .

[0065] According to one embodiment, the first connection portion 3 a and the second connection portion 3 b are obtained by directly shaping the disc-shaped body 2 .

[0066] According to the second embodiment, Figures 4a to 10 As shown, the roller 1 comprises a through hole 9 obtained in the disc-shaped body 2 and a pin 10 detachably mounted in the through hole 9. An end 10a of the pin 10 realizes one of the connecting portions 3a, 3b.

[0067] Thus, the connection 3a, 3b achieved by the pin 10 can be changed by simply removing the pin 10 and inserting another pin 10 having a different end shape.

[0068] Preferably, both the through hole 9 and the pin 10 are threaded.

[0069] Preferably, the through hole 9 has an elongated extension along a direction substantially parallel to the central rotation axis AA between a first end 9a and a second end 9b on opposite sides 2a, 2b of the disc-shaped body 2. Specifically, the first end 9a is located on the first side 2a of the disc-shaped body 2, and the second end 9b is located on the second side 2b of the disc-shaped body 2.

[0070] According to the illustrated embodiment, the first connection portion 3 a is located on the disk-shaped body 2 , whereas the second connection portion 3 b is located on the pin 10 .

[0071] The first connection portion 3a is located on the first side 2a of the disc-shaped body 2. The pin 10 is fitted into the through hole 9 so that the end 10a protrudes from the through hole 9 on the second side 2b of the disc-shaped body 2.

[0072] Preferably, the pin 10 comprises a mounting head 10b, which is opposite to the end 10a. The mounting head 10b is located at the first side 2a of the disc-shaped body 2 and at least partially covers the first connecting portion 3a.

[0073] In this second embodiment, it is clear that only one of the two connection parts 3a, 3b is available for connection at a time. If the pin 10 is not installed, the second connection part 3b does not exist, and the first connection part 3a is available. If the pin 10 is installed, the pin 10 itself blocks the first connection part 3a, and the second connection part 3b located on the tip of the pin 10 is available.

[0074] This embodiment allows a high degree of customizability, but at the same time keeps the structure simple and light.In practice, the pin 10 is only installed when a different connection part 3b is required.

[0075] As an alternative, the second connection portion 3 b is realized by a combination of the end 10 a of the pin 10 and the disc-shaped body 2 .

[0076] Preferably, the disc-shaped body 2, the through hole 9 and the pin 10 share the same axis of rotation, which is preferably the central axis of rotation AA.

[0077] According to one embodiment, both connection portions 3a, 3b are located on the pin 10, in particular at two opposite sides.

[0078] The roll 1 referred to herein is also referred to as a “suspended roll”. Since it is a known type of roll, it will not be described in detail, but it is considered to include all the features associated with suspended rolls.

[0079] In particular, the disc-shaped body 2 comprises an outer portion defining a recess 11 (or groove) extending in a circumferential direction thereof around a central axis of rotation AA.

[0080] In the following, a sliding system 100 for a door leaf of an elevator according to the invention is described.

[0081] The sliding system 100 comprises at least one slide 101 and the roller 1, wherein the slide 101 is used to be associated with the door leaf so as to move it along the sliding direction. Figure 6 and Fig.10 As shown, the roller 1 is mounted on the carriage 101 via the first connecting portion 3a or the second connecting portion 3b.

[0082] The features and advantages of the roller and sliding system for a door leaf of an elevator according to the invention emerge clearly from the above description.

[0083] In particular, due to the provision of different connecting parts, the roller can be used with different door styles.

[0084] In the first embodiment, both ends of the disc / support are shaped to couple with different mechanisms. Simply rotate the roller left and right and connect the appropriate end.

[0085] In the second embodiment, the insertable pin defining the second connecting portion allows coupling the roller with more than two different mechanisms, since the shape of the pin can be varied.

[0086] Furthermore, the flat surface allows for easier and faster connection to the door.

Claims

1. A roller (1) for a door leaf of an elevator, comprising: a disc-shaped body (2), the disc-shaped body (2) being rotatable around a central rotation axis (AA); a first connecting portion (3a) and a second connecting portion (3b), the first connecting portion (3a) and the second connecting portion (3b) being located on opposite sides (2a, 2b) of the disc-shaped body (2) and being used for selective connection to a door leaf of an elevator, The sizes of the first connecting portion (3a) and the second connecting portion (3b) are different from each other.

2. The roller (1) according to claim 1, wherein the first connecting portion (3a) and the second connecting portion (3b) have a cylindrical shape and the first connecting portion (3a) and the second connecting portion (3b) have different diameters.

3. Roller (1) according to claim 1 or 2, wherein: The first connecting portion (3a) and / or the second connecting portion (3b) has a side surface formed by a part-cylindrical surface (6) and at least one plane (7).

4. Roller (1) according to any one of claims 1 to 3, wherein: The disc-shaped body (2) comprises a support (4) on which the first connecting portion (3a) and the second connecting portion (3b) are obtained at two opposite sides.

5. Roller (1) according to claim 4, wherein: The support body (4) has an elongated extension along a direction substantially parallel to the central rotation axis (AA) between a first end (4a) and a second end (4b) located on the opposite sides (2a, 2b) of the disc-shaped body (2), the first end (4a) and the second end (4b) representing the first connecting portion (3a) and the second connecting portion (3b).

6. Roller (1) according to claim 5, wherein: The disc-shaped body (2) comprises a seat (5) serving as a through hole, and the support body (4) is assembled in the seat (5) serving as a through hole.

7. Roller (1) according to any one of claims 1 to 3, wherein: The first connecting portion (3a) and the second connecting portion (3b) are obtained by directly forming the disc-shaped body (2).

8. A roller (1) according to any one of claims 1 to 3, comprising a through hole (9) in the disc-shaped body (2) and a pin (10) removably mounted in the through hole (9), wherein the first connecting portion (3a) is located on the disc-shaped body (2) and the second connecting portion (3b) is located on the pin (10).

9. Roller (1) according to claim 8, wherein: The end (10a) of the pin (10) protrudes from the through hole (9) on the opposite side relative to the first connection part (3a), and the shape of the end (10a) of the pin (10) is designed to realize the second connection part (3b).

10. A sliding system (100) for a door leaf of an elevator, comprising: Roller (1) according to any one of the preceding claims; A carriage (101) connectable to the door leaf and coupled to the roller (1) via the first connecting portion (3a) or the second connecting portion (3b).

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