EP3990735A1

EP3990735A1 - Cable brake device

Info

Publication number: EP3990735A1
Application number: EP20733780.9A
Authority: EP
Inventors: Antonius PETERSE; Paul WENSING
Original assignee: Assa Abloy Entrance Systems AB
Current assignee: Assa Abloy Entrance Systems AB
Priority date: 2019-06-25
Filing date: 2020-06-18
Publication date: 2022-05-04
Also published as: WO2020260125A1

Abstract

The disclosure relates to a cable brake device (1) for braking the movement of a vertical moving door (2) in the event of breakage of a lift cable (3), comprising a base plate (20), a bottom bracket (30) configured to be mounted on the vertical moving door (2), a first roller (40) rotatable connected to the base plate (20) and rotatable mounted to the bottom bracket (30), a second roller (50) rotatable mounted on the base plate (20), a lever (60) pivotally connected to the base plate (20) and configured to be connected to the lift cable (3), a first friction disc (21) rotatable connected on the base plate (20) and rotatable connected to the lever (60), and a second friction disc (22) rotatable connected on the base plate (20) and configured to be connected to the lift cable (3), wherein: the first and second rollers (40, 50) are configured to interact with a track (4) and guide the vertical moving door (2) when it is moved between an open and closed position by the lift cable (3), the first and second friction discs (21, 22) are configured to be rotated between a braking position (B) and un-braked position (U), and the first and second friction discs (21, 22) are, in the braking position (B), configured to engage with the track (4) and to brake the movement of the cable brake device (1) and the vertical moving door (2) in relation to the track (4). The disclosure further relates to a vertical moving door system (100) comprising such a cable brake device (1).

Description

Cable Brake Device

Field of the invention

The present invention relates to vertical moving doors. More specifically, the disclosure relates to a cable brake device as defined in the introductory part of claim 1 and to a vertical moving door system as defined in the introductory part of claim 20.

Background art

A cable brake device is used to brake and stop the movement of a vertical moving door in the event of that a lift cable that moves the vertical moving door breaks or snaps. The cable brake device interacts with the tracks of the vertical moving door system and the cable brake device could damage the track in the event of the cable brake device being activated and brake the movement of the vertical moving door.

There is thus a problem in the industry when it comes to reducing the impact of the cable brake device being activated.

Summary

It is an object to mitigate, alleviate or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination and solve at least the above-mentioned problem.

According to a first aspect there is provided a cable brake device for braking the movement of a vertical moving door in the event of breakage of a lift cable, comprising a base plate, a bottom bracket configured to be mounted on the vertical moving door, a first roller rotatable connected to the base plate and rotatable mounted to the bottom bracket, a second roller rotatable mounted on the base plate, a lever pivotally connected to the base plate and configured to be connected to the lift cable, a first friction disc rotatable connected on the base plate and rotatable connected to the lever, and a second friction disc rotatable connected on the base plate and configured to be connected to the lift cable, wherein: the first and second rollers are configured to interact with a track and guide the vertical moving door when it is moved between an open and closed position by the lift cable, the first and second friction discs are configured to be rotated between a braking position and un-braked position, and the first and second friction discs are, in the braking position, configured to engage with the track and to brake the movement of the cable brake device and the vertical moving door in relation to the track. By a cable brake device according to this the risk of that the cable brake device damages the track could be reduced.

According to an aspect the first and second friction discs are configured to be moved towards the un-braked position by the lift cable when there is a tension applied to the lift cable and configured to be moved towards the braked position when there is a low/no tension applied to the lift cable.

According to an aspect the second friction disc is rotatable connected to the lever and wherein the lever is configured to move the first and second discs towards the braked position when it is rotated in relation to the base plate. By the lever being rotatable connected to the first and the second friction discs the cable brake device could be activated by only moving the lever to move it between the braking position and the un-brake position.

According to an aspect the cable brake device comprises a spring connected to the base plate and configured to exert a force on the lever to move the lever in a direction in which the lever move the first and second discs towards the braked position. The spring increases the security of the cable brake device as it forces the first and second friction discs towards the braking position.

According to an aspect the force of the spring is smaller than the tension in the lift cable when it lifts the vertical moving door.

According to an aspect the bottom bracket is configured to be connected to the lift cable in the un-braked position, such that forces from the lift cable and a weight of the vertical moving door is transferred directly between the lift cable and the bottom bracket. By this the forces in the cable brake device will be reduced and the wear of the cable brake device is reduced.

According to an aspect the cable brake device comprises an axel rotatable connected to the lever and the second friction disc and configured to be connected to the lift cable and transfer forces from the lift cable to the lever and the second friction disc to move the first and second friction discs towards the un-braked position.

According to an aspect the bottom bracket comprises a hook and the axel is configured to be arranged in the hook when the first and second discs are in the un-braked position and to transfer forces from the vertical moving door to the lift cable. The hook in combination with the axel is a robust and secure way to transfer forces in the un-braked position and at the same time not affect how the cable brake device is activated in the event of a breakage of the lift cable.

According to an aspect the base plate comprises a slot and the axel is moveably arranged in said slot.

According to an aspect the cable brake device comprises an elongated plate, wherein the elongated plate is connected to the axel at a first end and configured to be connected to the lift cable at a second end and wherein the elongated plate is configured to interact with the base plate to lock the position of the axel in relation to the base plate to disengage the spring. By this unintentional activation of the cable brake device could be reduced and at the same time not affect how the cable brake device is activated if the vertical moving door starts to move due to breakage of the lift cable.

According to an aspect the elongated plate comprises a lock hook and the base plate comprises a pin and wherein elongated plate is configured to be pivoted by the lift cable to latch the lock hook to the pin. This is a robust and efficient way of reducing the risk of that the cable brake device is unintentionally activated.

According to an aspect the elongated plate is configured to lock the position of the axel in relation to the base plate when the vertical moving door is in an open position.

According to an aspect the cable brake device is configured to interact with a track comprising a first and a second flanges, wherein the first roller is configured to interact with the first flange and the second roller is configured to interact with the second flange.

According to an aspect the second roller is curved in a cross sectional direction and configured to interact with the second flange of the track having a corresponding cross sectional shape to restrict movement of the second roller in an axial direction.

According to an aspect the first and second friction discs are configured to engage with the first flange of the track in the braking position. By having both the first and second friction discs engaging with the same flange of the track the risk of that the track is damaged is further reduced.

According to an aspect the first and second friction discs are configured to be positioned on opposite sides of the first flange of the track. By this the cable brake device could be balanced in relation to the track to even further reduce the risk of that the track is damaged when the cable brake device is activated. According to an aspect the first and second friction discs comprises a cam surface, wherein the cam surfaces are directed towards the track and are configured to be moved towards and engage with the track when the first and second friction discs are moved towards the braking position.

According to an aspect the cam surfaces comprises teeth configured to interact with the track.

According to an aspect the cam surfaces are eccentric in relation to an axel that the first respectively the second friction disc rotates around in relation to the base plate.

According to a second aspect there is provided a vertical moving door system comprising a vertical moving door, a lift cable, a track, a motor and a cable brake device according to the above, wherein the cable brake device connects the vertical moving door to the lift cable, the cable brake device at least partly connects the vertical moving door to the track and the motor is connected to the lift cable and configured to move the vertical moving door by the lift cable between an open and closed position.

According to an aspect the track comprises a first and a second flanges, wherein the first roller is configured to interact with the first flange and the second roller is configured to interact with the second flange.

According to an aspect the second flange is curved in a cross sectional direction of the track to restrict movement of the second roller it an axial direction.

A further scope of applicability of the present invention will become apparent from the detailed description given below. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only. Various changes and modifications within the scope of the invention will become apparent to those skilled in the art from the detailed description.

Hence, it is to be understood that the herein disclosed invention is not limited to the particular component parts of the device described or steps of the methods described since such device and method may vary. It is also to be understood that the terminology used herein is for purpose of describing particular embodiments only, and is not intended to be limiting. It should be noted that, as used in the specification and the appended claim, the articles "a", "an", "the", and "said" are intended to mean that there are one or more of the elements unless the context explicitly dictates otherwise. Thus, for example, reference to "a unit" or "the unit" may include several devices, and the like. Furthermore, the words

"comprising", "including", "containing" and similar wordings does not exclude other elements or steps.

Brief descriptions of the drawings

The above objects, as well as additional objects, features and advantages of the present invention will be more fully appreciated by reference to the following illustrative and non-limiting detailed description of example embodiments of the present invention, when taken in conjunction with the accompanying drawings.

Figure 1 shows a schematic cross sectional view of a vertical moving door system with the vertical moving door in an open position.

Figure 2 shows a schematic cross sectional view of a vertical moving door system with the vertical moving door in a closed position.

Figure 3 shows a schematic perspective view of a vertical moving door system with the vertical moving door in a position between the open and closed position and with a broken lift cable.

Figure 4 shows a schematic perspective view of an up and over vertical moving door system with the vertical moving door in a closed position.

Figure 5 shows a schematic perspective view of an up and above vertical moving door system with the vertical moving door in an open position.

Figure 6 shows a perspective view of a cable brake device connected to a lift cable.

Figure 7 shows a perspective view of a cable brake device connected to a lift cable.

Figure 8 shows a front view of a cable brake device in an un-braked position and connected to a lift cable and parts of a track.

Figure 9 shows a front view of a cable brake device in a braked position and connected to a lift cable and parts of a track.

Figure 10 shows a right side view of a cable brake device connected to a lift cable and parts of a track. Figure 11 shows a left side view of a cable brake device connected to a lift cable and parts of a track.

Figure 12 shows a rear view of a cable brake device connected to a lift cable and parts of a track.

Figure 13 shows a part of a side rear view of a cable brake device connected to a lift cable in a position when a vertical moving door is in a substantially open position.

Figure 14 shows a cross sectional view of a track.

Detailed description

The present invention will now be described with reference to the accompanying drawings, in which currently preferred example aspects and embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the herein disclosed embodiments. The disclosed aspects and embodiments are provided to fully convey the scope of the invention to the skilled person.

Figures 1-3 shows a vertical moving door system 100. The vertical moving door system 100 comprises a vertical moving door 2, a lift cable 3, a track 4, a motor 5 and a cable brake device 1.

The vertical moving door system 100 according to an aspect is an up and over vertical moving door 2 as is disclosed in fig. 1-4, i.e. the vertical moving door 2 is moveable from a closed position C to an open position O. In the open position O the vertical moving door 2 is positioned in a substantial horizontal position inside of an opening of a wall 110.

The vertical moving door system 100 according to an aspect is an up and above vertical moving door 2 as is disclosed in fig. 5, i.e. the vertical moving door 2 is moveable from a closed position C to an open position O. In the open position O the vertical moving door 2 is positioned in a substantial vertical position above an opening of a wall 110.

The vertical moving door 2 is according to an aspect a sectional vertical moving door 2 comprising a number of connected sections 9, as is disclosed in figure 1- 4.

The vertical moving door 2 is according to an aspect a single blade vertical moving door 2, as is disclosed in figure 5. The motor 5 is mounted at the opening, either directly on the wall 110 or at the track 4. The lift cable 3 is in one end connected to the motor 5 and in the other end connected to the vertical moving door 2 via the cable brake device 1. Put in another way, the lift cable 3 is mounted or connected to the cable brake device 1 and the cable brake device 1 is connected or mounted to the vertical moving door 2.

The motor 5 is configured to wind up and unwind the lift cable 3 on a drum and thereby move the vertical moving door 2 between the open and closed position O, C.

The vertical moving door 2 is moveably connected to the track 4. The cable brake device 1 is also moveably connected to the track 4. The track 4 is mounted at the opening and configured to guide the vertical moving door 2 when it is moved between the closed position C and the open position O. Put in another way, the track 4 guides the vertical moving door 2 when it is moved from the closed position C to the open position O and from the open positon O to the closed position C.

According to an aspect the cable brake device 1 connects the vertical moving door 2 to the lift cable 3, the cable brake device 1 at least partly connects the vertical moving door 2 to the track 4 and the motor 5 is connected to the lift cable 3 and configured to move the vertical moving door 2 by the lift cable 3 between the open and closed position O, C.

The cable brake device 1 is according to an aspect connected to the lowest section 9 of the sectional vertical moving door 2.

According to an aspect the vertical moving door system 100 comprises two motors 5, lift cables 3, tracks 4 and cable brake devices 1 positioned at opposite vertical edges of the opening.

In the event of the lift cable 3 breaks or snaps, as is disclosed in figure 3, or that there are some kind of failure in the motor 5 and the motor 5 or the lift cable 3 cannot control the movement of the vertical moving door 2, the cable brake device 1 is engaged and brakes the vertical moving door 2 from moving uncontrolled towards the closed position C. If the cable brake device 1 does not break the vertical moving door 2 there is a risk of that a person or objects in the path of the vertical moving door 2 could be injured or that the vertical moving door system 100 is damaged as the vertical moving door 2 hits the floor in an uncontrolled way. The vertical moving door system 100 as such are well known and will thus not be described further in detail herein.

Hereafter the cable brake device 1 will be described further with reference to figure 6- 13. The cable brake device 1 is configured for braking the movement of the vertical moving door 2 in the event of breakage of the lift cable 3.

The cable brake device 1 comprises a base plate 20, a bottom bracket 30, a first roller 40, a second roller 50, a lever 60, a first friction disc 21 and a second friction disc 22.

The base plate 20 is configured to be connected to the track 4 of the vertical moving door system 100. The base plate 20 has according to an aspect a T-shape. The base plate 20 according to an aspect comprises two or more plates that are connected in parallel to obtain through going passages in one or more directions. According to an aspect the base plate 20 comprises two plates connected in parallel, as is disclosed in figure 11. According to an aspect the base plate 20 is bent to obtain two parallel plates. A through going passage 27 is positioned between the two plates/parts of the base plate 20.

The bottom bracket 30 configured to be mounted on the vertical moving door 2. The bottom bracket 30 could be mounted to the vertical moving door 2 by a number of screws or bolts that are inserted in one or more holes 33 in the bottom bracket 30. According to an aspect the bottom bracket 30 comprises a fitting 32 that is configured to receive a rotating axel. According to an aspect the extension of the part of the bottom bracket 30 that is configured to be in contact with the vertical moving door 2 when the bottom bracket 30 is mounted on the vertical moving door 2 is substantially perpendicular to the extension of the base plate 20. According to an aspect the bottom bracket 30 has an L-shape. According to an aspect the bottom bracket 30 comprises a hook 31. The hook 31 extends in a direction that is directed away from the vertical moving door 2 when the bottom bracket 30 is mounted on the vertical moving door 2. The hook 21 is open in an direction that is directed away from the direction that the lift cable 3 exert tension in, i.e. when there is a tension in the lift cable 3 the tension could be directed towards the hook 21.

The first roller 40 is rotatable connected to the base plate 20 and rotatable mounted to the bottom bracket 30. According to an aspect an axle 41 of the first roller 40 is rotatable connected to the base plate 20 and rotatable mounted to the bottom bracket 30. The first roller 40 is according to an aspect rotatable connected to the base plate 20 via a through going hole in the base plate 20. The first roller 40 is according to an aspect rotatable connected to the base plate 20 by that the axle 40 of the first roller extends through the through going hole in the base plate 20. The first roller 40 is according to an aspect rotatable mounted to the bottom bracket 30 by that it is mounted in the fitting 32 of the bottom bracket 30. The first roller 40 is according to an aspect rotatable mounted to the bottom bracket by that the axle 40 of the first roller mounted or arranged in the fitting 32 of the bottom bracket 30.

The second roller 50 is rotatable mounted on the base plate 20. According to an aspect an axle 51 of the second roller 50 is rotatable connected to the base plate 20. The second roller 50 is according to an aspect rotatable mounted to the base plate 20 via a hole in the base plate 20. The second roller 50 is according to an aspect rotatable mounted to the base plate 20 by that the axle 51 of the second roller 50 is rotatable mounted in the hole in the base plate 20.

The lever 60 is pivotally connected to the base plate 20. The lever 60 is configured to be connected to the lift cable 3. The lever 60 is according to an aspect rotatable connected to the base plate 20 by a bolt or an axle 61. According to an aspect the lever 60 extends into the through going passage 27 of the base plate 20. The through going passage 27 of the base plate 20 thus reduces the number of moving parts of the cable brake device 1 that is exposed. The lever 60 is configured to extend from one side of the track 4 to another side of the track 4.

The first and second rollers 40, 50 are configured to interact with the track 4. The first and second rollers 40, 50 are configured to guide the vertical moving door 2 when it is moved between the open and closed position O, C by the lift cable 3.

The first friction disc 21 is rotatable connected on the base plate 20 and rotatable connected to the lever 60. The first friction disc 21 is according to an aspect rotatable connected to the base plate 20 by a bolt or an axle 28. The first friction disc 21 is according to an aspect rotatable connected to the lever 60 by a bolt or an axle 81. The first friction disc 21 could thus be rotated or pivoted in relation to base plate 20 and in relation to the lever 60.

The second friction disc 22 is rotatable connected on the base plate 20 and configured to be connected to the lift cable 3. The second friction disc 22 is according to an aspect rotatable connected to the base plate 20 by a bolt or an axle. The first friction disc 21 could thus be rotated or pivoted in relation to base plate 20 and in relation to the lever 60.

The first and second friction discs 21, 22 are configured to be rotated between a braking position B. as is disclosed in figure 9, and un-braked position U, as is disclosed in figure 8. In the braking position B, the first and second friction discs 21, 22 are, in the braking position B, configured to engage with the track 4 and to brake the movement of the cable brake device 1 and the vertical moving door 2 in relation to the track 4.

According to an aspect the first and second friction discs 21, 22 are configured to be moved towards the un-braked position U by the lift cable 3 when there is a tension applied to the lift cable 3. When the motor 5 winds up the lift cable 3 a force is applied to the lift cable 3 and a tension is present in the lift cable 3. The tension corresponds to the weight of the vertical moving door 2 and a moving speed of the vertical moving door 2. In the un-braked position U the cable brake device 1 does not apply a braking force to the track 4.

According to an aspect the first and second friction discs 21, 22 are configured to be moved towards the braked position B when there is a low/no tension applied to the lift cable 3. In case the lift cable 3 breaks or snaps, the tension in the part of the lift cable 3 that is still connected to the cable brake device 1 will be zero or at least close to zero and the cable brake device 1 will then move towards the braking position to apply a braking force to the track 4 to brake the movement of the vertical moving door 2 and stop it.

According to an aspect the second friction disc 22 is rotatable connected to the lever 60. The lever 60 is configured to move the first and second discs 21, 22 towards the braked position B when it is rotated in relation to the base plate 20. As both the first and second friction disc 21, 22 is rotatable connected to the lever 60 and the base plate 20, both the first and second friction discs 21, 22 will move and rotate when the lever 60 is moved in relation to the base plate 20. The lever 60 is according to an aspect moved in relation to the base plate 20 by being rotated or pivoted in relation to the base plate 20.

According to an aspect the first and second friction discs 21, 22 comprises a cam surface 23, 24. The cam surfaces 23, 24 are directed towards the track 4 and are configured to be moved towards and engage with the track 4 when the first and second friction discs 21, 22 are moved towards the braking position B. The cam surfaces 23, 24 are moved in the opposite direction, i.e. away from the track 4, when the first and second friction discs 21, 22 are moved from the braking position B to the un-braked position U.

According to an aspect the cam surfaces 23, 24 comprise teeth configured to interact with the track 4. The teeth^'s increases the friction between the track 4 and the first and second friction discs 21, 22 and thereby the braking forces are increased.

According to an aspect the cam surfaces 23, 24 are eccentric in relation to an axel 28,

29 that the first respectively the second friction discs 21, 22 rotates around in relation to the base plate 20. As the first and second friction discs 21, 22 are eccentric in relation to the axel 28, 29 that they rotate about, the distance between the first and second friction discs 21, 22 and the track 4 will change when the first and second friction discs 21, 22 rotates or pivots.

The distance will reduce when the first and second friction discs 21, 22 are moved towards the braking position B and increas as they are moved towards the un-braked position U. When the first and second friction discs 21, 22 are moved towards the braking position B the distance will reduce and as the first and second friction discs 21, 22 engages with the track 4 the braking force of the cable brake device 1 will increase as the first and second friction discs 21, 22 will be pressed harder and harder against the track 4.

According to an aspect the cable brake device 1 further comprises a spring 70. The spring is connected to the base plate 20. The spring 70 is configured to exert a force on the lever 60 to move the lever 60. The spring 70 is configured to apply the force in a direction in which the lever 60 moves the first and second discs 21, 22 towards the braked position B. Put in another way, the spring 70 is configured to move the lever 60 in an opposite direction to the tension in the lift cable 3. As is seen in figure 8 and 9 a tension in the lift cable 3 is forcing the lever upwards in the figure and the force of the spring 70 is acting on the lever 60 to move it downwards in the figure.

According to an aspect the force of the spring 70 is smaller than the tension in the lift cable 3 when it lifts the vertical moving door 2. As the tension in the spring 70 is smaller than the force or tension in the lift cable 3 when it is whole, the tension that the lift cable 3 exert on the lever 60 overcomes the force that the spring 70 exert on the lever 60 and the lift cable 3 will move the lever 60 and thereby move the first and second friction discs 21, 22 to their un-braked position U. However, if the lift cable 3 breaks the tension in the lift cable 3 is reduced and the force that the lift cable 3 exert on the lever 60 is smaller than the force from the spring 70 and the spring 70 will thus move the lever 60 in the opposite direction to move the first and second friction discs 21, 22 towards the braking position B.

According to an aspect the bottom bracket 30 is configured to be connected to the lift cable 3 in the un-braked position U, such that forces from the lift cable 3 and a weight of the vertical moving door 2 is transferred directly between the lift cable 3 and the bottom bracket 30. As the forces is transferred directly between the lift cable 3 and the bottom bracket 30, the wear and tear of the other parts of the cable brake device 1 could be reduced as the forces acting on them could be reduced. The cable brake device 1 according to an aspect comprises an axel 80. The axel 80 is rotatable connected to the lever 60 and the second friction disc 22. The axel 80 is configured to be connected to the lift cable 3. The axel 80 is configured to transfer forces/tension from the lift cable 3 to the lever 60 and the second friction disc 22 to move the first and second friction discs 21, 22 towards the un-braked position B. According to an aspect the axel 80 is connected to the lever 60 by being inserted in a hole in the lever 60. According to an aspect the axel 80 is connected to the second fiction disc 22 by being inserted in a hole in the second friction disc 22. Figure 12 discloses that the tension in the lift cable 3 lifts the axel 80 upwards in the figure, and thus the lever 60 and the first and second friction discs 21, 22 connected to the axel 80 is moved upwards. The lever 60 will move the first and second friction discs 21, 22 toward the un-braked position U. In the un-braked position U the axel 80 makes contact with the hook 31 and forces from the lift cable 3 is transferred via the axel 80 to the bottom bracket 30 via the hook 31 and thus also the vertical moving door 2 when it is mounted to the bottom bracket 30. The weight of the vertical moving door 2 will be transferred from the bottom bracket 30 to the lift cable 3 via the axel 80.

According to an aspect the axel 80 is configured to be arranged in the hook 31 of the bottom bracket 30 when the first and second discs 21, 22 are in the un-braked position B and to transfer forces from the vertical moving door 2 to the lift cable 3. According to an aspect the base plate 20 comprises a slot 25 and the axel 80 is moveably arranged in said slot 25.

In the event of that the lift cable 3 breaks or snaps the lever 60 will be moved downwards and the axel 80 will be moved together with the lever 60 and be disconnected from the hook 31. The forces and weight of the vertical moving door 2 will now be transferred from the bottom bracket 30 to the base plate 20 via the first roller 40. The lever 60 will move the first and second friction discs 21, 22 to the braking position B and the cable brake device 1 will stop the vertical moving door 2 from moving.

According to an aspect the cable brake device comprises an elongated plate 90. The elongated plate 90 is connected to the axel 80 at a first end and configured to be connected to the lift cable 3 at a second end, as is shown in figure 13. According to an aspect the elongated plate 90 is configured to interact with the base plate 20 to lock the position of the axel 80 in relation to the base plate 20 to disengage the spring 70.According to an aspect the elongated plate 90 comprises a lock hook 91 and the base plate 20 comprises a pin 26. The elongated plate 90 is configured to be pivoted by the lift cable 3 to latch the lock hook 91 to the pin 26. According to an aspect the elongated plate 90 is configured to lock the position of the axel 80 in relation to the base plate 20 when the vertical moving door 2 is in the open position O. When the vertical moving door 2 is moved towards its open position O, the forced in the lift cable 3 is reduced, since a large part of the weight of the vertical moving door 2 is resting on the track 4, as is disclosed in figure 1. As the tension in the lift cable 3 is reduced there is a risk of that the force of the spring 70 becomes larger than the tension in the lift cable 3 and that the cable brake device 1 is engaged and brakes the vertical moving door 2. By locking the position of the axel 80 in relation to the base plate 20, the cable brake device 1 is locked from being engaged. If the lift cable 3 breaks in this position, the vertical moving door 2 will start moving, the elongated plate 90 will be rotated to unlock the cable brake device 1 and the cable brake device 1 will stop the movement of the vertical moving door 2.

According to an aspect the track 4 comprises a first and a second flange 4a, 4b, as is disclosed in figure 6, 7 and 14. The first roller 40 is configured to interact with the first flange 4a. The second roller 50 is configured to interact with the second flange 4b. When the vertical moving door 2 is moved between the open and closed position O, C the first and second rollers 40, 50 will roll in the track 4 and the first roller 40 will roll on the first flange 4a and the second roller 50 will roll on the second flange 4b.

According to an aspect the track has a U-, C- or G-shaped cross sectional shape.

According to an aspect the second flange 4b is curved in a cross sectional direction of the track 4. The second flange 4b is configured to restrict movement of the second roller 50 in an axial direction. By axial direction is meant the axial direction of the second roller 50. The position of the parts of cable brake device 1 except for the bottom bracket 30 is then restricted in relation to the track 4. According to an aspect a cross sectional shape of the second roller 50 corresponds to the cross sectional shape of the second flange 4b. According to an aspect a cross sectional shape of the first flange 4a is straight to allow the first roller 40 and thereby the bottom plate 30 to move in relation to the track 4.

According to an aspect the first and second friction discs 21, 22 are configured to engage with the first flange 4a of the track 4 in the braking position B.

According to an aspect the first and second friction discs 21, 22 are configured to be positioned on opposite sides of the first flange 4a of the track 4. A brake force from the first friction disc 21 will, in a direction perpendicular to the extension of the track 4, be opposite to a brake force of the second friction disc 22. The risk of that the track 4 is bent or turned by the brake forces are thus reduced. Hereafter the movement of the vertical moving door 2 and activation of the cable brake device 1 will be described in more detail. If the vertical moving door should be moved from the closed position C towards the open position O, the motor 5 is activated and regulated, as is seen in figure 1. The motor 5 winds up the lift cable 3 to start moving the vertical moving door 2. The tension in the lift cable 3 is transferred to the axel 80. When the tension overcomes the forces from the spring 70, the lift cable 3 will lift the axel 80 upwards and the axel 80 will move in the slot 25 of the base plate 20. By upwards is here meant the direction that the lift cable 3 is moved to open the vertical moving door 2. The axel 80 is connected to the second friction disc 22 and the lever 60. When the axel 80 moves the lever 60 moves together with it and the axel 81 connecting the lever 60 and the first friction disc 21 moves upwards. The first and second friction discs 21, 22 are thus moved upwards by the axels 80, 81, however, as the first and second friction discs 21, 22 also are connected to the base plate 20 via the axels 28, 29, they will rotate around the center of the axels 80, 81 and the axels 28, 29. The first and second friction discs 21, 22 moves away from the first flange 4a of the track 4. The first and second friction discs 21, 22 are now positioned in the un-braked position U, as is disclosed in fig 8, and the cable brake device 1 is in an un-activated state. The axel 80 engages with the hook 31 of the bottom bracket 31 and as the motor 5 winds up the lift cable 3 further, the weight of the vertical moving door 2 connected to the bottom bracket 30 will be transferred from the hook 31 via the axel 81 to the lift cable 3. The lift cable 3 now moves the vertical moving door 2 from the closed position C towards the open position O.

In the event of that the lift cable 3 breaks and snaps, the tension in the lift cable 3 rapidly will decrease as it is no longer connected to the motor 5 and as is disclosed in figure 3. The decrease in the tension in the lift cable 3 will also reduce the force acting upwards on the lever 60 via the axel 80. The force from the spring 70 acting on the lever 60 is now larger than the force or tension in the lift cable 3 and the lever 60 is moved downwards by the spring 70. As the lever 60 pivots around its axel 61 by the spring 70, the first and second friction discs 21, 22 will rotate in the opposite direction and moves towards the braking position B. The eccentric cam surfaces 23, 24 of the first and second friction discs 21, 22 will move towards the first flange 4a of the track 4 as the first and second friction discs 21, 22 moves towards the first flange 4a. The cam surfaces 23, 24 of the first and second friction discs 21, 22 will move towards the first flange 4a of the track 4 from opposite sides of the first flange 4a. The cam surfaces 23, 24 will engage on opposite sides of the first flange 4a. When the first and second friction discs 21, 22 engages with the track 4, the friction between the surfaces will brake the movement between the vertical moving door 2 and the track 2. The forces from the vertical moving door 2 is transferred between the bottom bracket 30 mounted on the vertical mounted door 2 via the axel 41 of the first roller 40 to the base plate 20. The teeth on the cam surfaces 23, 24 will increase the friction and thus also increase the brake force. The weight of the vertical moving door 2 increases the force rotating the first and second friction discs 21, 22 and the brake force will thus increase further. The vertical moving door 2 is now stopped from moving before any person or object in the path of the vertical moving door 2 could be hit or that the vertical moving door 2 was damaged due to that it hits the floor. The forces from the cable brake device 1 is balanced as the first and second friction discs 21, 22 acts on opposite sides of the first flange 4a of the track 4 and the risk of the track 4 being bent is reduced. After the lift cable 3 is repaired or replaced and the motor 5 starts winding up the lift cable 3, the cable brake device 1 will once again move towards the un-braked position of the first and second friction discs 21, 22 and the vertical moving door 2 could be moved.

The person skilled in the art realizes that the present invention is not limited to the preferred embodiments described above. The person skilled in the art further realizes that modifications and variations are possible within the scope of the appended claims.

Additionally, all aspects and embodiments of the invention could be combined with the other aspects and embodiments of the invention. Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims.

Claims

1. A cable brake device (1) for braking the movement of a vertical moving door (2) in the event of breakage of a lift cable (3), comprising a base plate (20), a bottom bracket (30) configured to be mounted on the vertical moving door (2), a first roller (40) rotatable connected to the base plate (20) and rotatable mounted to the bottom bracket (30), a second roller (50) rotatable mounted on the base plate (20), a lever (60) pivotally connected to the base plate (20) and configured to be connected to the lift cable (3), a first friction disc (21) rotatable connected on the base plate (20) and rotatable connected to the lever (60), and a second friction disc (22) rotatable connected on the base plate (20) and configured to be connected to the lift cable (3), wherein: the first and second rollers (40, 50) are configured to interact with a track (4) and guide the vertical moving door (2) when it is moved between an open and closed position by the lift cable (3), the first and second friction discs (21, 22) are configured to be rotated between a braking position (B) and un-braked position (U), and the first and second friction discs (21, 22) are, in the braking position (B), configured to engage with the track (4) and to brake the movement of the cable brake device (1) and the vertical moving door (2) in relation to the track (4).

2. The cable brake device (1) according to claim 1, wherein the first and second

friction discs (21, 22) are configured to be moved towards the un-braked position (U) by the lift cable (3) when there is a tension applied to the lift cable (3) and configured to be moved towards the braked position (B) when there is a low/no tension applied to the lift cable (3).

3. The cable brake device (1) according to any of claims 1 or 2, wherein the second friction disc (22) is rotatable connected to the lever (60) and wherein the lever (60) is configured to move the first and second discs (21, 22) towards the braked position (B) when it is rotated in relation to the base plate (20).

4. The cable brake device (1) according to claim 3, comprising a spring (70) connected to the base plate (20) and configured to exert a force on the lever (60) to move the lever (60) in a direction in which the lever (60) move the first and second discs (21, 22) towards the braked position (B).

5. The cable brake device (1) according to claim 4, wherein the force of the spring (70) is smaller than the tension in the lift cable (3) when it lifts the vertical moving door (2) .

6. The cable brake device (1) according to any of the preceding claims, wherein the bottom bracket (30) is configured to be connected to the lift cable (3) in the un braked position (U), such that forces from the lift cable (3) and a weight of the vertical moving door (2) is transferred directly between the lift cable (3) and the bottom bracket (30).

7. The cable brake device (1) according to any of the preceding claims, comprising an axel (80) rotatable connected to the lever (60) and the second friction disc (22) and configured to be connected to the lift cable (3) and transfer forces from the lift cable (3) to the lever (60) and the second friction disc (22) to move the first and second friction discs (21, 22) towards the un-braked position (U).

8. The cable brake device (1) according to claim 7, wherein the bottom bracket (30) comprises a hook (31) and the axel (80) is configured to be arranged in the hook (31) when the first and second discs (21, 22) are in the un-braked position (B) to transfer forces from the vertical moving door (2) to the lift cable (3).

9. The cable brake device (1) according to claim 7 or 8, wherein the base plate (20) comprises a slot (25) and the axel (80) is moveably arranged in said slot (25).

10. The cable brake device (1) according to any of claims 7-9, comprising an elongated plate (90), wherein the elongated plate (90) is connected to the axel (80) at a first end and configured to be connected to the lift cable (3) at a second end and wherein the elongated plate (90) is configured to interact with the base plate (20) to lock the position of the axel (80) in relation to the base plate (20) to disengage the spring (70).

11. The cable brake device (1) according to claim 10, wherein the elongated plate (90) comprises a lock hook (91) and the base plate (20) comprises a pin (26) and wherein elongated plate (90) is configured to be pivoted by the lift cable (3) to latch the lock hook (91) to the pin (26).

12. The cable brake device (1) according to any of claims 10 or 11, wherein the elongated plate (90) is configured to lock the position of the axel (80) in relation to the base plate (20) when the vertical moving door (2) is in an open position (O).

13. The cable brake device (1) according to any of the preceding claims, wherein the cable brake device (1) is configured to interact with a track (4) comprising a first and a second flanges (4a, 4b), wherein the first roller (40) is configured to interact with the first flange (4a) and the second roller (50) is configured to interact with the second flange (4b).

14. The cable brake device (1) according to claim 13, wherein the second roller (50) is curved in a cross sectional direction and configured to interact with the second flange (4b) of the track (4) having a corresponding cross sectional shape to restrict movement of the second roller (50) in an axial direction.

15. The cable brake device (1) according to any of claims 13 or 14, wherein the first and second friction discs (21, 22) are configured to engage with the first flange (4a) of the track (4) in the braking position (B).

16. The cable brake device (1) according to any of claims 13 - 15, wherein the first and second friction discs (21, 22) are configured to be positioned on opposite sides of the first flange (4a) of the track (4).

17. The cable brake device (1) according to any preceding claims, wherein the first and second friction discs (21, 22) comprises a cam surface (23, 24), wherein the cam surfaces (23, 24) are configured to be directed towards the track (4) and are configured to be moved towards and engage with the track (4) when the first and second friction discs (21, 22) are moved towards the braking position (B).

18. The cable brake device (1) according to claim 17, wherein the cam surfaces (23, 24) comprises teeth configured to interact with the track (4).

19. The cable brake device (1) according to any of claims 17 or 18, wherein the cam surfaces (23, 24) are eccentric in relation to an axel (28, 29) that the first respectively the second friction disc (21, 22) rotates around in relation to the base plate (20).

20. A vertical moving door system (100) comprising a vertical moving door (2), a lift cable (3), a track (4), a motor (5) and a cable brake device (1) according to any of claims 1-19, wherein the cable brake device (1) connects the vertical moving door (2) to the lift cable (3), the cable brake device (1) at least partly connects the vertical moving door (2) to the track (4) and the motor (5) is connected to the lift cable (3) and configured to move the vertical moving door (2) by the lift cable (3) between an open and closed position (O, C).