Tensioning mechanism for door operator system

Abstract

A tensioning mechanism (100) for a door operator system (S) for opening and closing an opening (O). The door operator system (S) comprises a door (20) and a drive unit mounted on the door (20) and configured to move the door (20) between an open position and a closed position. The door operator system comprises an elongated transmission member (40) extending along a side of the opening (O), and a driven transmission member (34) of the drive unit (30) is configured to interact with the first elongated transmission member (40) to move the door (20) between a closed position and an open position. The tensioning mechanism (100) comprises a bracket member (110) for facilitating mounting of the tensioning mechanism (100), a connecting member (120) for connecting the first elongated transmission member (40), and a tensioning device (T) comprising a spring mechanism (130) comprising a spring member (132). The spring mechanism (130) is configured to be coupled to the connecting member (120) to facilitate tailoring of the spring load of the spring member (132). The tensioning device (T) is configured to be disposed in coupling relation to the bracket member (110) to facilitate tensioning of the first elongate transmission member (40). The present invention further relates to a door operator system.

Description

[Technical field]

[0001] The present invention relates to a tensioning mechanism for a door operator system.The present invention relates to a door operator system comprising such a tensioning mechanism. [Background technology]

[0002] A door operator system for a door typically comprises a door coupled to a door frame and a drive unit configured to move the door along the door frame between an open position and a closed position to open and close an opening. The door, which may be a sectional door, is typically used as a garage door or an industrial door. The drive unit may further comprise a motor to move the door.

[0003] In a conventional overhead sectional door, an electric motor mounted above the door uses a wire attached to the door to lift the door. Such overhead sectional doors often implement a balance spring to reduce the force required to open the door, but this balance spring increases the complexity and is cumbersome to install. In case such a conventional overhead sectional door is damaged, such as a broken wire, a mechanical device is used to stop the door from falling.

[0004] To achieve a more efficient door operator system that reduces the complexity and risks of the door operator system during operation, maintenance, and installation, door operator systems have been developed in which a drive unit is mounted relative to the door.

[0005] To achieve high accuracy and proper alignment in relation to the operation of the door, a long transmission member, such as a chain, may be implemented along the side of the door opening. In such a system, a driven sprocket on the door may interface with a long transmission member that extends next to the door. Such a long transmission member that extends next to the door needs to have a certain tension to achieve proper operation of the door operator system.

[0006] Therefore, a need exists for a tensioning mechanism for a door operator system that facilitates providing tension to such elongate transmission members in an easy and efficient manner for proper operation of the door operator system. Summary of the Invention [Problem to be solved by the invention]

[0007] One object of the present invention is to provide a tensioning mechanism for a door operator system having an elongate transmission member for moving a door of the door operator system, which facilitates providing tension to the elongate transmission member in an easy and efficient manner for proper operation of the door operator system.

[0008] It is another object of the present invention to provide a door operator system that includes such a tensioning mechanism. [Means for solving the problem]

[0009] These and other objects that will become apparent from the following description are achieved by a tensioning mechanism for a door operator system and a door operator system comprising such a tensioning mechanism, preferred embodiments of which are defined in the appended dependent claims.

[0010] Specifically, the object of the present invention is achieved by a tensioning mechanism for a door operator system configured to open and close an opening. The door operator system comprises a door frame having a first frame section located on a first side of the opening and a second frame section located on a second side of the opening opposite the first side, and a door arranged to be moved between an open position and a closed position, the door being arranged in a movable coupled state relative to the door frame. The door operator system further comprises a drive mechanism including a drive unit mounted on the door, the drive unit comprising at least one motor configured to move the door between the open position and the closed position, and a first driven transmission member in driving communication with the motor. The door operator system further comprises a first elongated transmission member extending along the first side of the opening between an upper position and a lower position, the first elongated transmission member being configured to be coupled in the upper position and the lower position. A first driven transmission member is movably connected to the first elongated transmission member and configured to interact with the first elongated transmission member to move the door between a closed position and an open position by driving the first driven transmission member along the first elongated transmission member with the first elongated transmission member. The tensioning mechanism is configured to be mounted in a connected state to the first side in one of the upper position and the lower position. The tensioning mechanism includes a bracket member for facilitating mounting of the tensioning mechanism. The tensioning mechanism further includes a tensioning device including a connecting member for connecting the first elongated transmission member and a spring mechanism including a spring member. The spring mechanism is configured to be connected to the spring connecting member to facilitate adapting the spring load of the spring member, and the spring tensioning device is configured to be arranged in a connected state to the bracket member, whereby tension is provided to the first elongate transmission member when the first elongate transmission member is connected at one of the upper position and the lower position and connected to the connecting member at the other of the upper position and the lower position.

[0011] Thereby, a desired tension of the elongate transmission member, e.g. a chain, can be easily and efficiently achieved. By facilitating the adaptation of the spring load of the spring member in this way, a desired tension of elongate transmission members, e.g. chains, of different lengths can be efficiently managed, thereby facilitating a wider tolerance range. Furthermore, by providing a tensioning mechanism with such a connectable bracket member and tensioning device in this way, an easy and efficient assembly, e.g. a tool-less assembly, is facilitated. The tensioning device is configured to connect to said bracket member, so that the maximum load associated with the elongate transmission member is borne by the bracket member.

[0012] According to one embodiment of the tensioning mechanism, the spring mechanism comprises a coupling element arranged in coupling with the spring element to facilitate the adaptation of the spring load of the spring element, and the bracket element comprises at least one groove adapted to receive the coupling element and thereby support the spring tensioning device, thereby facilitating the adaptation of the spring load of the spring element. The tensioning device thus facilitates the adaptation of the spring load of the spring element. The tensioning device thus facilitates the adaptation of the spring load of the spring element. The tensioning device further comprises a coupling element arranged in coupling with the at least one groove of the bracket element, such that the maximum load associated with the elongated transmission member is supported by the bracket element, i.e. by the at least one groove of the bracket element.

[0013] According to one embodiment of the tensioning mechanism, the bracket member comprises a set of grooves located at different heights, and the coupling element is movably arranged with respect to the coupling member to facilitate its introduction into the grooves located at the height that provides the desired tension in the first elongate transmission member, whereby the desired tension in the elongate transmission member, e.g. a chain, can be easily and efficiently achieved.

[0014] According to one embodiment of the tensioning mechanism, the connecting member comprises a receiving part and a connecting part, the receiving part is configured to receive the connecting element and the spring member, the spring mechanism further comprises a locking member, the connecting part is configured to provide a stop for the connecting element, the spring member is arranged in the spring mechanism receiving part between the connecting element and the locking member, and the connecting element is arranged in a connected and movable state with respect to the receiving part to facilitate the adaptation of the spring load of the spring member, whereby the adaptation of the spring load of the spring member can be easily and efficiently achieved.

[0015] According to one embodiment of the tensioning mechanism, the receiving part has an end part and an adaptation part arranged between the end part and the connecting part, whereby the spring member can be easily and efficiently applied to the receiving part and the spring load of the spring member can be obtained in an easy and efficient manner. The assembly of the spring member to the receiving part can be realized without the need for any tools.

[0016] According to one embodiment of the tensioning mechanism, the end portion has a through hole for receiving the locking member, whereby assembly and locking of the spring member can be achieved easily and efficiently, and assembly of the locking member to the end portion of the receiving part can be achieved without the need for any tools.

[0017] According to one embodiment of the tensioning mechanism, the connecting element has a through opening, the opening and the receiving part are configured such that the connecting element is movably arranged around the receiving part and can be stopped by the connecting part, and the connecting element is rotatable at the adapting part between a first position allowing the movement of the connecting element along the receiving part for coupling and decoupling, and a second position allowing the movement only along the adapting part between the connecting part providing a first stop and the end part providing a second stop. This facilitates easy and efficient assembly of the spring arrangement. This facilitates easy and efficient assembly of the spring arrangement without the need for any tools. This facilitates easy and efficient fixing of the spring member to the connecting member.

[0018] According to one embodiment of the tensioning mechanism, the connecting members include a first connecting member having a first connecting portion and a second connecting member having a second connecting portion, each connecting portion having one or more teeth facing one or more teeth of the other connecting portion and configured to engage an end portion of the first elongate transmission member to achieve the connection, facilitating an easy, efficient and safe connection of the elongate transmission members, e.g. chains.

[0019] According to one embodiment of the tensioning mechanism, the at least one groove comprises a retaining means for retaining the connecting element in the groove, such that the connecting element can be efficiently retained in the bracket member.

[0020] According to one embodiment of the tensioning mechanism, the bracket member has an elongated configuration having a first end portion, an opposing second end portion, and an intermediate portion configured to extend along a portion of the first side when the tensioning mechanism is attached in a connected state to the first side, and the at least one groove is disposed in the intermediate portion.

[0021] According to one embodiment, the tensioning mechanism further comprises a guide roller configured to be arranged in coupling with an end portion of the bracket member such that its axis extends transversely to the longitudinal extension of the bracket member, the first elongate transmission member configured to extend and turn from the connecting member towards the end portion when the tensioning mechanism is mounted in coupling with the first side portion and the first elongate transmission member is coupled to the connecting member, the guide roller configured to guide the first elongate transmission member such that the first elongate transmission member turns in coupling with the guide roller and extends in the opposite direction along the first side portion to another coupling position, facilitating an efficient guiding of the elongate transmission member and an efficient arrangement of the tensioning mechanism in coupling with the first side portion.

[0022] According to one embodiment of the tensioning mechanism, the connecting member has an elongate configuration configured to extend along a longitudinal extension of the bracket member, whereby efficient support by the bracket member may be achieved.

[0023] According to one embodiment of the tensioning mechanism, the bracket member has a U-shaped configuration with a bottom portion configured to define a mounting side, a first side portion, and an opposing second side portion substantially parallel to the first side portion, the side portions extending in a longitudinal direction of the bracket member, thereby allowing efficient support by the bracket member to be achieved.

[0024] According to one embodiment of the tensioning mechanism, the at least one groove is provided as one or more recesses located in each side portion of the bracket member, whereby an efficient support by the bracket member can be efficiently achieved.

[0025] According to one embodiment of the tensioning mechanism, the tensioning mechanism is configured to be coupled to the first side in the lower position, which facilitates easy and efficient assembly, which can easily provide efficient tensioning of the elongated transmission member, such as a chain, which facilitates easy and efficient operation of the door operator system.

[0026] Specifically, the object of the present invention is achieved by a door operator system configured to open and close an opening. The door operator system comprises a door frame having a first frame section located on a first side of the opening and a second frame section located on a second side of the opening opposite the first side, and a door arranged to be moved between an open position and a closed position, the door being arranged in a movable coupled state relative to the door frame. The door operator system further comprises a drive mechanism comprising a drive unit mounted on the door, the drive unit comprising at least one motor configured to move the door between the open position and the closed position, and a first driven transmission member in driving communication with the motor. The door operator system further comprises a first elongated transmission member extending along the first side of the opening between an upper position and a lower position, the first elongated transmission member configured to be coupled in the upper position and the lower position. A first driven transmission member is movably coupled to the first elongated transmission member and configured to interact with the first elongated transmission member to move the door between a closed position and an open position by driving the first driven transmission member along the first elongated transmission member with the first elongated transmission member. The door operator system includes a tensioning mechanism as described herein for providing tension to the first elongated transmission member.

[0027] According to one embodiment of the door operator system, the drive mechanism includes a second driven transmission member in driving communication with a motor of the drive mechanism. The door operator system includes a second elongated transmission member extending along a second side of the opening between an upper position and a lower position, the second elongated transmission member configured to be coupled at the upper position and the lower position, the second driven transmission member movably coupled to the second elongated transmission member and configured to interact with the second elongated transmission member to move the door between a closed position and an open position by driving the second driven transmission member along the second elongated transmission member by the second elongated transmission member. The door operator system includes a tensioning mechanism as shown herein for providing tension to the second elongated transmission member.

[0028] For a better understanding of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout the several views, and in which: [Brief description of the drawings]

[0029] [Figure 1] FIG. 1 is a schematic perspective view of a door operator system for opening and closing an opening with the door in a closed position according to one embodiment of the present disclosure. [Diagram 2] FIG. 1 is a schematic front view of a door operator system for opening and closing an opening with the door in a closed position according to one embodiment of the present disclosure. [Diagram 3] FIG. 1 is a schematic perspective view of a portion of a door operator system having a drive unit and a tensioning mechanism for the door operator system, according to one aspect of the present disclosure. [Figure 4] FIG. 1 is a schematic perspective view of a tensioning mechanism for a door operator system according to one aspect of the present disclosure. [Diagram 5] FIG. 5 is a schematic exploded perspective view of the tensioning mechanism of FIG. 4 according to one embodiment of the present disclosure. [Figure 6a] FIG. 5 is a schematic front view of the tensioning mechanism of FIG. 4 according to one embodiment of the present disclosure. [Figure 6b]FIG. 5 is a schematic side view of the tensioning mechanism of FIG. 4 according to one embodiment of the present disclosure. [Figure 7] 5 is a schematic perspective view of the tensioning mechanism of FIG. 4 in coupled position relative to a frame section of a door operator system, with an elongate transmission member coupled to the tensioning mechanism, according to one embodiment of the present disclosure. [Figure 8a] FIG. 5 is a schematic perspective view of a connecting member and a connecting element of the tensioning mechanism of FIG. 4 in an assembled state, according to one embodiment of the present disclosure. [Figure 8b] 8b is a schematic perspective view of the connecting member and connecting element of FIG. 8a in an assembly situation related to the connection of an elongate transmission member according to one embodiment of the present disclosure. FIG. [Figure 9a] 8b is a schematic perspective view of the coupling member and coupling element of FIG. 8a in an assembled state in association with the spring member of the tensioning mechanism of FIG. 4 according to one embodiment of the present disclosure. FIG. [Figure 9b] FIG. 2 is a schematic perspective view of a spring mechanism comprising the connecting element of a tensioning mechanism, the spring member, and a locking member connected to the connecting member, according to one aspect of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention can be embodied in many different forms, and therefore should not be construed as being limited to the embodiments and aspects described herein. Rather, these embodiments and aspects are presented so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. The terms used in the detailed description of specific embodiments / aspects shown in the accompanying drawings are not intended to limit the present invention. In the drawings, like numbers refer to like elements.

[0031] FIG. 1 shows a schematic perspective view and FIG. 2 shows a front view of a door operator system S to which the inventive aspects of the present invention may be applied. The door operator system comprises a door frame 10, a drive mechanism D, and a door 20. The door operator system S is configured to be installed in an opening O defined by a wall and a floor / ground. The door 20 is coupled to the door frame 10. The door operator system S is configured to open and close the opening O by moving the door 20 between an open position P1 and a closed position P2. The door 20 is in a closed position P2 in FIG. 1 and in an open position P1 in FIG. 2. The open position may be a horizontal open position, in the form of a planar horizontal position or an inclined horizontal position, as shown diagrammatically by the door operator system in FIG. 1, such as a vertical open position shown in FIG. 2. The closed position P2 may be a vertical closed position P2.

[0032] In an embodiment, such as that shown in FIG. 1, the door 20 is a sectional door 20 made up of a plurality of horizontal, interconnected sections 20a-20e connected to a door frame 10. In one embodiment, the door is a garage door. In another embodiment, the door is an industrial door. The door 20 is configured to be moved along the door frame 10 between a closed position P2 and an open position P1.

[0033] The door operator system S may include a first terminal and a second terminal, not shown, at least one of which is configured to transmit energy for powering the motor of the drive unit and for charging an energy storage device, such as a battery. In an alternative embodiment, power may be supplied to the motor of the drive unit by electrical wiring.

[0034] The door operator system shown diagrammatically in Figure 1 is an up-and-over door operator system, in which the door is disposed substantially vertically in the closed position P2 and approximately horizontally and within the opening in the open position P1.

[0035] In an alternative embodiment, the door operator system may be one in which the door is disposed substantially vertically in the closed position P2 and in an angled position between a substantially vertical position and a substantially horizontal position in the open position P1. For example, the door may be disposed at a 45° angle from the horizontal position P1 in the open position P1, although one skilled in the art will appreciate that the door may be disposed at any angle between the horizontal and vertical orientations of the door in the open position P1.

[0036] The door frame 10 comprises a first frame section 12 located on a first side I of the opening O and a second frame section 14 located on a second side II of the opening O. The door frame 10 is connected to a wall and to a floor, i.e. to the floor of the opening O. In one embodiment, the first frame section 12 comprises a substantially vertically extending portion 12-1 and a substantially horizontally extending portion 12-2. The second frame section 14 comprises a substantially vertically extending portion 14-1 and a substantially horizontally extending portion 14-2. The vertically extending portions 12-1, 14-1 and the horizontally extending portions 12-2, 14-2 are connected to form a path for the door 20 to slide and a track for the drive unit 30 to cooperate with.

[0037] Thus, the first frame section 12 and the second frame section 14 each include vertically extending portions 12-1, 14-1, horizontally extending portions 12-2, 14-2, and bent interconnecting portions 12-3, 14-3. In other words, the first frame section 12 includes a vertically extending portion 12-1, a horizontally extending portion 12-2, and a bent interconnecting portion 12-3. Thus, the bent interconnecting portion 12-3 connects the vertically extending portion 12-1 and the horizontally extending portion 12-2. Similarly, the second frame section 14 includes a vertically extending portion 14-1, a horizontally extending portion 14-2, and a bent interconnecting portion 14-3. Thus, the bent interconnecting portion 14-3 connects the vertically extending portion 14-1 and the horizontally extending portion 14-2.

[0038] The vertically extending portions 12-1, 14-1 may be vertical portions 12-1, 14-1 or inclined vertical portions 12-1, 14-1. Similarly, the horizontally extending portions 12-2, 14-2 may be horizontal portions 12-2, 14-2 or inclined horizontal portions 12-2, 14-2.

[0039] The door 20 is movably connected to the first frame section 12 at a first side and to the second frame section 14 at a second side. In one embodiment, one or more of the plurality of sections 20a-20e is connected to the first frame section 12 at the first side I and to the second frame section 14 at the second side II.

[0040] The door operator system S comprises the drive mechanism D for operating the door operator system. The drive mechanism D comprises a drive unit 30 attached to the door 20. The drive unit 30 comprises at least one motor 32. The at least one motor 32 is configured to move the door 20 between a closed position P2 and an open position P1.

[0041] To enable driving of the door 20, the door operator system S further comprises an elongate transmission member 40 extending along the first side I of the opening O. The elongate transmission member 40 may further extend along the first frame section 12. The drive unit 30 further comprises a driven transmission member 34 in driving communication with the motor 32.

[0042] The driven transmission member 34 is movably connected to the elongated transmission member 40 and configured to interact with the elongated transmission member 40 to drive the driven transmission member 34 along the elongated transmission member 40 by at least partially wrapping the driven transmission member 34 around the elongated transmission member 40. Thus, the elongated transmission member 40 is disposed to at least partially surround the driven transmission member 34.

[0043] The elongate transmission member 40 provides a more cost-effective solution, both in terms of manufacturing and installation, when compared to a fixed rack. Additionally, the elongate transmission member allows for relative movement between the door 20 and the frame, and does not require high precision and proper alignment in the same manner as a fixed rack solution. Thus, the elongate transmission member may be configured to allow a certain degree of movement along a direction perpendicular to the first frame section 12.

[0044] Additionally, the elongated transmission member 40 provides a safer door operator system because the elongated transmission member 40 will at least to some extent follow and remain engaged with the driven transmission member even if the door is pushed away from the rail. Additionally, the elongated transmission member is quieter and more wear-resistant than a fixed rack, and is less likely to malfunction due to pinching of external objects.

[0045] The elongate transmission member 40 may be in the form of a bendable transmission member. The elongate transmission member 40 may be in the form of a suspended transmission member. It is noted that in this context, bendable does not necessarily mean that the transmission member is necessarily flexible, but merely means that the transmission member can be wrapped around the driven transmission member. The transmission member 40 may therefore be considered as being configured to be in engagement with the driven transmission member 34 and allowing relative movement between the driven transmission member 34 and the direction of movement of the door 20 defined by the frame 10. In other words, the transmission member may be considered as a non-fixed transmission member or a suspended transmission member. The elongate transmission member may therefore be configured to engage the driven transmission member independently of the frame.

[0046] The drive unit 30 is movably connected to the elongate transmission member 40. The drive unit 30 is thus connected to said elongate transmission member 40 to allow relative movement between the door and the frame, whereby the drive unit 30 is fixed to the door 20. The drive unit 30 comprises at least one motor 32. The drive unit 30 is configured to move the door 20 from a closed position to an open position. To provide power to the motor 32, the at least one motor 32 may be connected to at least one energy storage device, such as a battery, arranged to power the at least one motor 32.

[0047] In one embodiment, the drive unit 30 is configured to move the door from the open position P1 to the closed position P2. In one embodiment, the door 20 is configured to move from the open position P1 to the closed position P2 due to the weight of the door 20. In one embodiment, the drive unit 30 is configured to brake the door 20 when moving from the open position P1 to the closed position P2.

[0048] The door operator system S includes a tensioning mechanism 100 for facilitating tensioning of the elongate transmission member. In the embodiment shown in Figures 1 and 2, the tensioning mechanism is arranged in a coupled state to the elongate transmission member 40 in a lower position. According to one aspect of the present disclosure, the elongate transmission member 40 is arranged to be coupled to the tensioning mechanism 100 in an upper position and in the lower position. The tensioning mechanism is described in more detail below, for example with reference to Figures 4, 5, 6a-6b, and 7.

[0049] Locating the tensioning mechanism 100 in the lower location facilitates easier access for operators to perform service work including applying tension to elongate transmission members.

[0050] FIG. 3 illustrates generally a perspective view of a portion of a door operator system having a drive unit 30 and a tensioning mechanism for the door operator system, according to one embodiment of the present disclosure.

[0051] As shown in FIG. 3, in one embodiment, the door operator system further includes at least one guide member G1. The at least one guide member G1 is attached to the door 20. The guide member G1 may be configured to interact with the long transmission member 40 to guide the door 20 along the long transmission member 40 by the long transmission member 40 being at least partially wrapped around the at least one guide member G1. Thus, the guide member G1 moves the long transmission member 40 and guides the driven transmission member 34 relative to the long transmission member 40 to properly align the long transmission member 40 and the driven transmission member 34. Preferably, the guide member G1 may be a rotatable guide member that may be attached to the door 20 by a journal connection. Thus, the long transmission member 40 may be arranged to at least partially surround the guide member G1.

[0052] 3, the elongate transmission member 40 may be configured to wrap around and interact with a portion of the driven transmission member 34 and a portion of the guide member G1. The portion of the driven transmission member 34 that interacts with the elongate transmission member 40 is located opposite the portion of the guide member G1 that interacts with the elongate transmission member 40. This provides a larger engagement surface between the driven transmission member, the guide member, and the elongate transmission member, which may provide a more stable door operator system requiring lower torque for operation.

[0053] As shown, for example, in FIG. 3, the elongate transmission member 40 is coupled to the tensioning mechanism 100 and disposed along a first side I of the opening O.

[0054] The elongated transmission member 40 may be any conventional elongated transmission member 40 that provides the necessary slack to compensate for horizontal or tilting movement of the drive unit and / or the door. The elongated transmission member may be a belt or a chain.

[0055] In one embodiment, the elongate transmission member 40 may be a belt. Thus, the guide member G1 and the driven transmission member 34 may be pulley elements configured to interface with said belt. In one embodiment, the belt may be a cog belt or a ribbed belt, and the guide member G1 and the driven transmission member 34 may be cog wheels that interface with the ribs of said cog belt or said ribbed belt.

[0056] The long transmission member 40 may also be a chain, as shown for example in FIG. 3. The chain may comprise slots for receiving cogs. The driven transmission member 34 may thus be a cog wheel configured to interact with the chain, for example a slot in the chain. The driven transmission member 34 may be a sprocket. Furthermore, the guide member G1 may be a cog wheel configured to interact with the chain, for example a slot in the chain. The guide member G1 may be a sprocket. In one embodiment, the guide member G1 may be a rib wheel for interacting with the chain. In one embodiment, the chain is a non-endless chain, for example a single chain only partially surrounding the guide member and the driven transmission member.

[0057] In one embodiment, the door operator system further comprises a first guide roller set G2 and a second guide roller set G2. The first guide roller set and the second guide roller set are attached to the door 20. The first guide roller set G2 is configured to interact with the first frame section 12 and the second guide roller set G2 is configured to interact with the second frame section 14. Thus, the guide rollers move with the door 20 in a guided manner along a track formed by a frame, e.g., the first frame section 12 and the second frame section 14.

[0058] In one embodiment, the drive unit 30 is mounted to the bottom section 20 e of the door 20 .

[0059] According to one embodiment, the guide roller G2 is attached to the door 20 by a shaft G2s.

[0060] According to one aspect of the disclosure, as shown generally in FIGS. 1 and 2, the door operator system includes a pair of elongate transmission members 40 to enable a more stable movement pattern of the door 20. A first elongate transmission member 40 extends along a first side I of the opening O. The first elongate transmission member 40 may further extend along the first frame section 12. A second elongate transmission member 40 extends along a second side II of the opening O. The second elongate transmission member 40 may further extend along the second frame section 14. Guide and drive mechanisms described with reference to the first side of the door 20 may be correspondingly mirrored for the second side of the door 20.

[0061] Thus, the door operator system S may further include a first driven transmission member and a second driven transmission member 34 which are configured to interact with the first elongated member and the second elongated member 40 by the first elongated member and the second elongated member being at least partially wrapped around the first driven transmission member and the second driven transmission member, respectively.

[0062] The first and second driven transmission members 34 may be driven by a single or multiple motors 32. In one embodiment, a single motor 32 is in driving communication with the first and second transmission members 34. The single motor 32 may be coupled to the first and second driven transmission members 34 by first and second shafts extending from the motor 32. As will be further described with reference to FIG. 3 , the drive unit 30 may include a first motor and a second motor each drivingly coupled to the first and second driven transmission members 34, respectively.

[0063] Similar to the first vertical side of the door, the second side of the door may have one or more guide members mounted thereon. In one embodiment, the door operator system further comprises at least one guide member G1 mounted on the door 20 configured to interact with the second elongated transmission member 40 to guide the door 20 along the second elongated transmission member 40 by the second elongated transmission member 40 being at least partially wrapped around said guide member. In other words, the door operator system comprises at least one first guide member G1 mounted on the door 20 and at least one second guide member G1 mounted on the door 20, the first guide member G1 and the second guide member G1 being configured to interact with the first elongated transmission member 40 and the second elongated transmission member 40, respectively, by the first elongated transmission member 40 and the second elongated transmission member 40 being at least partially wrapped around the first guide member and the second guide member, respectively.

[0064] Both of these elongate transmission members 40 may be coupled to respective tensioning mechanisms 100 as shown diagrammatically in Figures 1 and 2. In accordance with the present disclosure, the top ends of these elongate transmission members 40 may be fixedly attached and the bottom ends of the elongate transmission members 40 may be coupled to the tensioning mechanism 100. This allows easier access for an operator to perform service work involving the application of tension by the tensioning mechanism 100.

[0065] The first and second driven transmission members 34 may be configured to extend in opposite directions from the door 20 toward the first and second elongated transmission members 40, respectively. The first driven transmission member 34 may be disposed proximate a first vertical phase of the door, the first phase being adjacent to the first elongated transmission member when the door is in the closed position. Similarly, the second driven transmission member 34 may be disposed proximate a second vertical phase of the door, the second phase being adjacent to the second elongated transmission member when the door is in the closed position.

[0066] In one embodiment in which the drive unit 30 includes a single motor, the motor may be coupled to a reduction gear arrangement, which may be in the form of a gearbox, such that an output shaft of the gearbox is coupled to the first and second driven transmission members 34 to transmit torque to the first and second driven transmission members 34, or to a single driven transmission member if the operator system has only one elongate transmission member.

[0067] In one embodiment in which the drive unit 30 comprises a first motor and a second motor 32, the first motor may be coupled to a first reduction gearing, e.g., a gearbox, and coupled to a first driven member, and the second motor may be coupled to a second reduction gearing, e.g., a gearbox, and coupled to a second driven member.

[0068] Preferably, the motor 32 and the drive unit 30 are arranged in the same main phase of the door 20, for example the outer phase or the inner phase of the door 20. In order to protect the motor 32 and the drive unit 30, said motor and drive unit are arranged in the inner phase of the door in the form of an inner facing door phase of the door 20.

[0069] In one embodiment, the motor 32 of the drive unit 30 is a direct current DC motor 32. In a preferred embodiment, the motor 32 is a brushless direct current (BLDC) motor.

[0070] 3, where the door 20 is in the closed position P2 and the drive unit is located on the lower section 20e of the door 20, a tensioning mechanism 100 according to one embodiment of the present disclosure is mounted in a connected state to the first side I in a lower position. The elongate transmission member 40, here in the form of a chain / chain arrangement, is connected to the tensioning mechanism 100 at an end portion 42 and in an upper position connected to the first side I, such as to any suitable connecting device (not shown) connected at an opposite end portion (not shown).

[0071] Additionally, tensioning mechanism 100 is illustrated in Figures 4, 5, 6a-6b, and 7, and will be described in more detail below.

[0072] FIG. 4 generally illustrates a perspective view, FIG. 5 an exploded perspective view, FIG. 6a a front view, FIG. 6b a side view, and FIG. 7 another perspective view of a tensioning mechanism for a door operator system according to one embodiment of the present disclosure.

[0073] The tensioning mechanism 100 includes a bracket member 110 for facilitating mounting of the tensioning mechanism 100 .

[0074] According to one aspect of the present disclosure, the bracket member 110 has an elongated configuration configured to extend along a portion of the first side I when the tensioning mechanism 100 is attached in a connected state to the first side I.

[0075] According to one aspect of the disclosure, the bracket member 110 has a first end portion 110a, an opposing second end portion 110b, and an intermediate portion 110c. In embodiments in which the tensioning mechanism 100 is disposed in the lower position, such as shown in FIG. 3, the first end portion 110a is the upper end portion, the second end portion 110b is the lower end portion, and the intermediate portion 110c is disposed therebetween.

[0076] According to one aspect of the disclosure, the bracket member 110 has a U-shaped configuration with a bottom portion 114 configured to form a mounting side, a first side portion 116, and an opposite second side portion 118 substantially parallel to the first side portion 116. The two side portions extend in a longitudinal direction of the bracket member 110. The bottom portion has an outer surface 114a configured to be a mounting side and thus configured to face toward a surface to which the bracket member 110 is mounted.

[0077] According to one aspect of the present disclosure, the bracket member 110 includes a through opening 110O disposed through the bottom portion 114 to facilitate attachment of the bracket member, such as by a joint member J1 as shown in FIG.

[0078] The bracket member 110 includes at least one groove 112G. According to one embodiment of the present disclosure, the bracket member 110 includes a set of grooves 112G disposed in the middle portion 110c, as shown in, for example, Figures 4, 5, 6a-6b, and 7.

[0079] For example, as shown in Figures 4, 5, 6a-6b, and 7, according to one embodiment of the present disclosure, the set of grooves 112G are provided as recesses in each side portion 116, 118 of the bracket member 110. The set of grooves 112G in each side portion 116, 118 are provided such that when the bracket member 110 is mounted in a mating manner against a side of a door opening at a frame section, the groove 112G in the first side portion 116 and the laterally opposite groove 112G in the second side portion 118 form a pair of grooves 112G located at the same height.

[0080] The pair of grooves 112G of a set of grooves 112G recessed into each side portion 116, 118 of the bracket member 110 provide the bracket member 110 with various heights for receiving connecting elements 134 of the tensioning mechanism T. The connecting elements 134 are described in more detail below.

[0081] The set of grooves 112G formed as recesses in each side portion 116, 118 of the bracket member 110 form a set of protrusions 112 in the intermediate portion 110c of the bracket member. Thus, each side portion 116, 118 of the bracket member 110 includes a set of protrusions 112 in the intermediate portion 110c of the bracket member. The protrusions 112 are configured to protrude substantially perpendicular to the longitudinal and lateral extensions of the bracket member 110 distributed along each side portion 116, 118, and the grooves 112G are provided between adjacent protrusions 112 along each side portion 116, 118 of the bracket member 110.

[0082] According to one aspect of the present disclosure, the at least one groove 112G includes a retaining means 112a for retaining the connecting element 134 within the groove 112G. According to one aspect of the present disclosure, the retaining means 112a is provided by a stop portion in engagement with an outer end of each groove 112G, i.e., with an end of the groove 112G that is furthest away from the bottom portion 114 of the bracket member 110.

[0083] According to one embodiment of the present disclosure, the retaining means 112a are provided by stop end portions of each protrusion 112, which are configured to allow the connecting element 134 to be introduced into the pair of grooves 112G at a desired height and such that when the connecting element 134 is introduced into the pair of grooves 112G, the connecting element 134 is prevented from slipping out by the retaining means 112a which is shaped as the stop end portions of the protrusions 112 which are in a connected state with the outer ends of the grooves 112G.

[0084] The tensioning mechanism 100 includes a tensioning device T configured to be coupled to a bracket member 110 when the tensioning mechanism 100 is mounted and used to apply tension to the elongate transmission member 40. The tensioning device T is configured to be coupled to a bracket member 110 by the connecting element 134 when the tensioning mechanism 100 is mounted and used to apply tension to the elongate transmission member 40.

[0085] The tensioning device T includes a connecting member 120 for connecting the first elongated transmission member 40. The tensioning device T further includes a spring mechanism .

[0086] The spring mechanism 130 includes a spring member 132. The spring mechanism 130 is configured to be coupled to the coupling member 120 to facilitate tailoring the spring load of the spring member 132.

[0087] The tensioning device T is configured to be disposed in connection with the bracket member 110, thereby providing tension to the first elongate transmission member 40 when the bracket member is mounted in the lower position and the first elongate transmission member 40 is connected to the connecting member 120, as shown, for example, in Figures 3 and 7.

[0088] The spring mechanism 130 includes the connecting element 134. According to one embodiment, the connecting element 134 is a plate-shaped element. According to one embodiment, the connecting element 134 is shaped to fit into the groove 112G of the bracket member. According to one embodiment, the connecting element 134 is shaped to allow the connecting element 134 to be received by a pair of grooves 112G located at different heights of the intermediate portion 110c of the bracket member 110.

[0089] The coupling element 134 is configured to be disposed in coupling relation to the spring member 132 to facilitate the adaptation of the spring load of the spring member 132. The set of grooves 112G is configured to receive the coupling element 134 to provide coupling for the tensioning device T. According to one aspect of the present disclosure, the set of grooves 112G is configured to receive the coupling element 134 to support the tensioning device T.

[0090] According to one aspect of the present disclosure, the connecting element 134 is configured to be movably positioned relative to the connecting member 120 to facilitate introduction of the connecting element 134 into a groove 112G / pair of grooves 112G located at a height that imparts a desired tension to the first elongate transmission member 40.

[0091] According to one aspect of the present disclosure, the connecting member 120 has an elongated configuration configured to extend along a longitudinal extension of the bracket member 110 when the tensioning device T is connected to the bracket member.

[0092] Figures 8a-b and 9a-b show schematic perspective views of parts of the tensioning device T of the tensioning mechanism 100, including the connecting member 120 and the connecting element 134 in an assembled state, and further the spring mechanism 130 connected to the connecting member 120 as shown in Figure 9b.

[0093] According to one aspect of the present disclosure, the connecting member 120 includes a receiving portion 122 and a connecting portion 124. The receiving portion 122 is configured to receive the connecting element 134 and the spring member 132. The connecting portion 124 is configured to provide a connection with the end portion 42 of the elongated transmission member 40, such as a chain.

[0094] According to one aspect of the present disclosure, the spring mechanism 130 further comprises a locking member 136 configured to lock the spring member in the receiving portion 122 between the locking member 136 and the connecting element 134 .

[0095] According to one aspect of the present disclosure, the connecting portion 124 is configured to provide a stopper for the connecting element 134, and the spring member 132 is positioned in the spring mechanism receiving portion 122 between the connecting element 134 and the locking member 136.

[0096] The connecting portion 124 has a wider lateral extension than the receiving portion 122 such that the connecting element 134 is movable along the receiving portion 122 but is stopped by the wider lateral extension of the connecting portion 124. Thus, the transition of the elongate connecting member 120 from the receiving portion 122 to the connecting portion 124 is configured to provide a stop for the connecting element 134.

[0097] The connecting element 134 is configured to be movably arranged in a connected state relative to the receiving portion 122 to facilitate the adaptation of the spring load of the spring member 132. The connecting element 134 has a through opening 134O, as shown, for example, in FIG. 8a, which facilitates application of the connecting element 134 onto and around the receiving portion 122 of the connecting member 120.

[0098] According to one aspect of the present disclosure, the receiving portion 122 has an end portion 122a and an adapting portion 122b disposed between the end portion 122a and the connecting portion 124. According to one aspect of the present disclosure, the end portion 122a has a through hole 122h for receiving the locking member 136.

[0099] According to one aspect of the present disclosure, the through opening 134O of the connecting element 134 and the receiving portion 122 are configured such that the connecting element 134 can be movably positioned around the receiving portion 122 and stopped by the connecting portion 124.

[0100] According to one embodiment of the present disclosure, the through opening 134O of the connecting element 134 and the receiving portion 122 are configured to be rotatable between a first position in the adapting portion 122b that allows the connecting element 134 to move along the entire receiving portion 122 for connecting and disconnecting with the connecting member, and a second position that allows movement only along the adapting portion 122b between the connecting portion 124 providing a first stop and the end portion 122a providing a second stop (see, for example, FIG. 8a).

[0101] According to one aspect of the present disclosure, the receiving portion 122 has an elongated configuration, with the end portion 122a having a wider lateral extension relative to its longitudinal extension than the conforming portion 122b. According to one aspect of the present disclosure, the through opening 134O of the connecting element 134 has a cross-shaped configuration with a wider opening configured to fit around the end portion 122a and the conforming portion 122b and a shorter opening configured to fit only around the conforming portion. According to one aspect of the present disclosure, the shorter opening of the through opening 134O is configured to extend substantially transversely to the wider opening of the through opening 134O.

[0102] According to one aspect of the disclosure, the coupling member 120 comprises a first coupling member 120-1 having a first coupling portion 124-1 and a second coupling member 120-2 having a second coupling portion 124-2. The coupling portions 124-1, 124-2 of each coupling member 120-1, 120-2 comprise one or more teeth. The one or more teeth of each coupling portion face the one or more teeth of the other coupling portion and are configured to engage the end portion 42 of the elongate transmission member 40 to provide the coupling (see, e.g., FIG. 8b).

[0103] According to one aspect of the present disclosure, the first connecting member 120-1 with the first connecting portion 124-1 and the second connecting member 120-2 with the second connecting portion 124-2 are configured to be controllably moved relative to each other by moving a connecting element 134 in a second position toward the end portion 122a in association with the connection of the end portion 42 of the elongate transmission member 40, such as a chain, whereby the first connecting portion and the second connecting portion are moved away from each other with the one or more teeth facing each other to allow the introduction of the end portion of the elongate transmission member 40 between the one or more teeth facing each other, and then moving the connecting element toward these connecting portions, whereby the first connecting portion and the second connecting portion engage with the end portion 42 to connect the elongate transmission member 40.

[0104] The spring member 132 is configured to be applied against the receiving portion 122 of the connecting member 120 when the end portion 42 is connected to the connecting portion 124 of the connecting member 120 (see FIG. 9a). According to one embodiment, the spring member 132 is a coil spring member 132.

[0105] When the spring member 132 is applied to the receiving portion 122 of the connecting member 120, the locking member 136 is configured to be applied at the end portion 122a such that the spring member 132 is disposed between the connecting element 134 and the locking member 136. In this manner, the assembly of the tensioning device T is completed. The assembly of the tensioning device thus described can be achieved without the use of any tools. In this manner, the spring load of the spring member 132 can be adapted by moving the connecting element 134 along the adapting portion 122b.

[0106] The tensioning device T is then configured to be coupled to the bracket member 110 by introducing the coupling element 134 into a groove 112G / pair of grooves 112G located at a desired height of the set / pair of grooves 112G (see, e.g., Figures 3 and 7).

[0107] The spring load of the spring member 132 may be adapted between a first spring load (see FIG. 9b) corresponding to a first position of the connecting element 134 closest to the connecting portion 124, which corresponds to a first length L1 of the spring member 132 when the spring member 132 is locked between the connecting element 134 and the locking member 136, a second spring load (see FIG. 7) corresponding to a second position of the connecting element 134 located in a second position closer to the end portion 122a, which corresponds to a second length L2 of the spring member 132, and a spring load between the first and second spring loads.

[0108] According to one aspect of the present disclosure, the first spring load corresponds to a spring load when the spring member 132 is locked between the connecting element 134 and the locking member 136, but no pressure / force is applied to the connecting element 134. According to one aspect of the present disclosure, the second spring load corresponds to a maximum spring load when the spring member 132 is locked between the connecting element 134 and the locking member 136, and no pressure / force is applied to the connecting element 134.

[0109] According to one aspect of the disclosure, the tensioning mechanism 100 further comprises a guide roller 140 configured to be arranged in coupling relation to the second end portion 110b of the bracket member 110 (see, e.g., FIGS. 5 and 6a, etc.). The guide roller 140 is configured to be arranged in coupling relation to the bracket member 110 such that an axis X of the guide roller 140 extends transversely to the longitudinal extension of the bracket member 110.

[0110] According to one aspect of the present disclosure, a long transmission member 40, such as a chain, is configured such that when the tensioning mechanism 100 is attached in a connected state to a side of a door operator system at the lower position and a first long transmission member 40 is connected to a connecting member 120, the long transmission member 40 extends from the connecting member toward the second end portion 110b, turns around, and continues upward along the side of the door operator system where the long transmission member 40 is connected to a frame section to an upper position where it is connected.

[0111] The guide roller 140 is configured to guide the elongated transmission member 40 so that the elongated transmission member 40 rotates in connection with the guide roller 140 and extends in a direction opposite to the upper connection position along the side of the door operator system.

[0112] The description of the aspects of the disclosure presented herein is provided for illustrative purposes. This description is not intended to be exhaustive or to limit the aspects of the disclosure to the exact form disclosed, and modifications and variations are possible in light of the above teachings, or may be obtained by implementing various alternative forms of the presented aspects of the disclosure. The examples discussed herein have been selected and described for the purpose of explaining the principles and properties of the various aspects of the disclosure and their practical applications, so that those skilled in the art can utilize the aspects of the disclosure in various ways and with various modifications as suitable for the specific applications anticipated. The features of the aspects of the disclosure described herein may be combined in any possible combination of methods, devices, modules, systems, and computer program products. It should be understood that the aspects of the disclosure presented herein may be implemented in any combination with each other.

[0113] It should be noted that the word "comprising" does not necessarily exclude the presence of other elements or steps than those listed. Moreover, it should be noted that any reference signs are not intended to limit the scope of the claims. [Explanation of symbols]

[0114] 10 Door Frame 12 First Frame Section 12-1 Substantially vertically extending portion, vertical portion, inclined vertical portion 12-2 Substantially horizontally extending portions, horizontal portions, inclined horizontal portions 12-3 Bent interconnection section 14 Second Frame Section 14-1 Substantially vertically extending portion, vertical portion, inclined vertical portion 14-2 Substantially horizontally extending parts, horizontal parts, inclined horizontal parts 14-3 Bent interconnection section 20 Doors, Sectional Doors Section 20a Section 20b Section 20c 20d Section Section 20e 30 Drive unit 32 Motor, first motor, second motor, direct current (DC) motor 34 Driven transmission member, first driven transmission member, second driven transmission member 40 Long transmission member, first long transmission member, second long transmission member 42 End section 100 tension mechanism 110 Bracket member 110a First end portion 110b second end portion 110c middle part 110O through opening 112 Protrusion 112a Retaining means 112G Groove 114 Bottom part 114a Outside 116 first side portion 118 Second side portion 120 Connecting members, long connecting members 120-1 First connecting member 120-2 Second connecting member 122 Receiving part, spring mechanism receiving part 122a End section 122b Adaptation part 122h through hole 124 Connecting part 124-1 First connecting part 124-2 Second connecting part 130 Spring mechanism 132 Spring components, coil spring components 134 Connected Elements 134O Through opening 136 Locking member 140 Guide roller G1 guide member, first guide member, second guide member G2 1st guide roller set, 2nd guide roller set, guide roller G2s Shaft J1 Joint material L1 First length L2 Second length P1 open position P2 closed position

Claims

1. A tensioning mechanism (100) for a door operator system (S) configured to open and close an opening (O), the door operator system comprising: a door frame (10) having a first frame section (12) located on a first side (I) of the opening (O) and a second frame section (14) located on a second side (II) of the opening (O) opposite the first side (I); and a door (20) arranged to be moved between an open position and a closed position, the door (20) being movably arranged in connection with the door frame (10). and a drive mechanism (D) including a drive unit (30) mounted on the door (20), the drive unit (30) including at least one motor (32) configured to move the door (20) between the open position and the closed position, and a first driven transmission member (34) in driving communication with the motor (32), the door operator system including a first elongated transmission member (40) extending along the first side (I) of the opening (O) between an upper position and a lower position, the first elongated transmission member (40) being in driving communication with the first driven transmission member (34). a first elongated transmission member (40) configured to be coupled at the upper position and the lower position, the first driven transmission member (34) movably coupled to the first elongated transmission member (40) and configured to interact with the first elongated transmission member (40) to move the door (20) between the closed position and the open position by driving the first driven transmission member (34) along the first elongated transmission member (40) by the first elongated transmission member (40), and the tensioning mechanism (100) is configured to be coupled at one of the upper position and the lower position, and a tensioning device (T) configured to be mounted in a connected state to the first side (I) via a tensioning mechanism (100), the tensioning device (100) comprising a bracket member (110) for facilitating mounting of the tensioning mechanism (100), a connecting member (120) for connecting the first elongated transmission member (40), and a spring mechanism (130) comprising a spring member (132), the spring mechanism (130) being configured to be connected to the connecting member (120) to facilitate adaptation of the spring load of the spring member (132), the tensioning device (T) comprising:a tensioning mechanism (100) configured to be disposed in connection with the bracket member (110) such that tension is provided to the first elongate transmission member (40) when the first elongate transmission member (40) is connected in one of the upper position and the lower position and connected to the connecting member (120) in the other of the upper position and the lower position;

2. 2. The tensioning mechanism (100) of claim 1, wherein the spring mechanism (130) comprises a connecting element (134) arranged in a connected state with respect to the spring member (132) to facilitate the adaptation of the spring load of the spring member (132), and the bracket member (110) comprises at least one groove (112G) configured to receive the connecting element (134) and thereby support the tensioning device (T).

3. 3. The tensioning mechanism (100) of claim 2, wherein the bracket member (110) includes a set of grooves (112G) located at various heights, and the connecting element (134) is movably positioned relative to the connecting member (120) to facilitate introduction of the connecting element (134) into a groove (112G) located at an height that provides a desired tension to the first elongate transmission member (40).

4. 4. The tensioning mechanism of claim 2 or 3, wherein the connecting member (120) comprises a receiving portion (122) and a connecting portion (124), the receiving portion (122) configured to receive the connecting element (134) and the spring member (132), the spring mechanism (130) further comprises a locking member (136), the connecting portion (124) configured to provide a stop for the connecting element (134), the spring member (132) disposed in the spring mechanism receiving portion (122) between the connecting element (134) and the locking member (136), and the connecting element (134) disposed movably in connection with the receiving portion (122) to facilitate the adaptation of the spring load of the spring member (132).

5. 5. The tensioning mechanism (100) of claim 4, wherein the receiving portion (122) has an end portion (122a) and an adapting portion (122b) disposed between the end portion (122a) and the connecting portion (124).

6. The tensioning mechanism (100) of claim 5, wherein the end portion (122a) has a through hole (122h) for receiving the locking member (136).

7. 7. The tensioning mechanism of claim 5 or 6, wherein the connecting element has a through opening, the opening and the receiving portion are configured such that the connecting element is movably disposed about the receiving portion and can be stopped by the connecting portion, and the connecting element is rotatable at the adapting portion between a first position that allows movement of the connecting element along the receiving portion for coupling and decoupling, and a second position that allows movement only along the adapting portion between the connecting portion providing a first stop and the end portion providing a second stop.

8. The tensioning mechanism (100) of any one of claims 4 to 7, wherein the connecting member (120) comprises a first connecting member (120-1) having a first connecting portion (124-1) and a second connecting member (120-2) having a second connecting portion (124-2), each of the connecting portions comprising one or more teeth, the one or more teeth of each of the connecting portions facing the one or more teeth of the other connecting portion and configured to engage an end portion of the first elongate transmission member to achieve the connection.

9. The tensioning mechanism (100) of claim 8, wherein the at least one groove (112G) comprises a retaining means (112a) for retaining the connecting element (134) within the groove (112G).

10. 10. The tensioning mechanism of claim 1, wherein the bracket member (110) has an elongated configuration having a first end portion (110a), an opposing second end portion (110b), and an intermediate portion (110c) configured to extend along a portion of the first side (I) when the tensioning mechanism (100) is attached in a connected state to the first side (I), and the at least one groove (112G) is disposed in the intermediate portion.

11. 11. The tensioning mechanism of claim 10, further comprising a guide roller (140) configured to be arranged in connection with an end portion of the bracket member (110) such that an axis (X) of the guide roller (140) extends transversely to a longitudinal extension of the bracket member (110), the first elongate transmission member (40) is configured to extend and turn from the connecting member (120) towards the end portion when the tensioning mechanism (100) is mounted in connection with the first side (I) and the first elongate transmission member (40) is connected to the connecting member (120), and the guide roller (140) is configured to guide the first elongate transmission member (40) such that the first elongate transmission member (40) turns in connection with the guide roller (140) and extends in the opposite direction along the first side (I) to another connecting position.

12. 12. The tensioning mechanism (100) of any one of claims 1 to 11, wherein the connecting member (120) has an elongated configuration configured to extend along the longitudinal extension of the bracket member (110).

13. 13. The tensioning mechanism (100) of any one of claims 2 to 12, wherein the bracket member (110) has a U-shaped configuration with a bottom portion (114) configured to define a mounting side, a first side portion (116) and an opposing second side portion (118) substantially parallel to the first side portion (116), the side portions extending in a longitudinal direction of the bracket member (110).

14. The tensioning mechanism of claim 13, wherein the at least one groove (112G) is provided as one or more recesses located in each of the side portions (116, 118) of the bracket member (110).

15. The tensioning mechanism of any one of claims 1 to 14, wherein the tensioning mechanism (100) is configured to be mounted in a connected manner to the first side (I) at the lower position.

16. A door operator system (S) configured to open and close an opening (O), the door operator system comprising: a door frame (10) having a first frame section (12) located on a first side (I) of the opening (O) and a second frame section (14) located on a second side (II) of the opening (O) opposite the first side (I); a door (20) arranged to be moved between an open position and a closed position, the door (20) being arranged movably connected to the door frame (10); and a drive mechanism (D) comprising a drive unit (30) mounted on the door (20), the drive unit (30) comprising at least one motor (32) configured to move the door (20) between the open position and the closed position, and a first driven transmission member (34) in driving connection with the motor (32).

16. A door operator system comprising: a first elongated transmission member (40) extending along the first side (I) of the opening (O) between an upper position and a lower position, the first elongated transmission member (40) configured to be coupled at the upper position and the lower position, the first driven transmission member (34) movably coupled to the first elongated transmission member (40) and configured to interact with the first elongated transmission member (40) to move the door (20) between the closed position and the open position by driving the first driven transmission member (34) along the first elongated transmission member (40) by the first elongated transmission member (40), the door operator system comprising a tensioning mechanism (100) according to any one of claims 1 to 15 for providing tension to the first elongated transmission member (40).

17. The drive mechanism (D) includes a second driven transmission member (34) in driving connection with a motor (32) of the drive mechanism (D), and the door operator system includes a second elongated transmission member (40) extending along the second side (II) of the opening (O) between an upper position and a lower position, the second elongated transmission member (40) being configured to be connected at the upper position and the lower position, the second driven transmission member (34) being movably connected to the second elongated transmission member (40), 17. The door operator system of claim 16, configured to interact with the second elongated transmission member (40) to move the door (20) between the closed position and the open position by driving the second driven transmission member (34) along the second elongated transmission member (40), the door operator system comprising a tensioning mechanism (100) as described in any one of claims 1 to 15 for providing tension to the second elongated transmission member (40).

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