TH40629A - Door closing mechanism - Google Patents

Abstract

DC60 (23/09/42) The door closing mechanism consists of an actuator assembly (20) optimized to fit within the thickness of the door and which has a fitting for securing to the door edge surface where the door will be mounted on the hinge, and a fixing assembly (10) optimized to fit into the door frame facing against that door edge surface. The acting assembly (30) moves by movement within the actuator assembly (20) under the action of a spring mechanism (45) and engages with the fixing assembly (10) so that the spring mechanism (45) pulls the actuator assembly (20) and fixing assembly (10) together, so that when the closing mechanism is installed, it pulls the door toward and into a closed position relative to the door frame. A fluid-filled damper (50) is engaged with the acting assembly and is arranged to control the rate of movement of the actuator assembly (20) and fixing assembly (10). The actuating assembly, subjected to the force of the spring-loaded mechanism (45), at least in the door closing direction, shall be provided with a rebounding thrust mechanism (92) to provide an increased thrust to the actuating assembly (30), and control mechanisms (88-105) shall be provided in which the thrust mechanism (92) shall be in an operating state to provide the increased thrust to the actuating assembly (30) in a specified portion of the said range of motion at one end of that range and correspond to the movement of the door in the final portion of its movement toward its closing position. This provision of thrust mechanism shall amplify the closing force applied to the door toward the closing position, or at least overcome any closing resistance caused by any latch mechanism coupled with the door assembly and frame, as the door continues to operate toward a controlled rate of closing. The door closing mechanism shall consist of an actuating assembly (20) optimized to fit within the thickness of the door and which contains the actuating assembly. A locking assembly (10) is fitted to the door frame where it is attached to the hinge, and a fixing assembly (10) is fitted into the door frame facing the door frame. The operating assembly (30) moves within the actuator assembly (20) under the action of a spring mechanism (45) and engages with the fixing assembly (10), so that the spring mechanism (45) pulls the actuator assembly (20) and the fixing assembly (10) together, so that when the closing mechanism is installed, the mechanism pulls the door toward and into a closed position relative to the door frame. A fluid-filled damper (50) is engaged with the operating assembly and is arranged to control the rate of movement of the operating assembly under the force of the spring mechanism (45), at least in the door closing direction. A rebounding pusher mechanism (92) is arranged to provide an additional thrust to the actuator assembly. The aforementioned operating assembly (30) and the control mechanism (88-105) shall be provided in which such a thrust mechanism (92) shall be in an operating state to apply the aforementioned increased thrust force to the aforementioned operating assembly (30) in a specified portion of the said range of motion at one end of that range of motion and shall correspond to the movement of the door in the final portion of its movement toward its closing position. The provision of this type of thrust mechanism shall extend the closing force applied to the door toward the position toward its closing position with certainty or at least overcome any closing resistance caused by any latch mechanism coupled with the door assembly and frame as the door continues to operate toward its controlled closing rate.

Claims (18)

1. A door closing mechanism of the following type: a fixing assembly (10) for fitting onto the door frame; a drive assembly (20) for fitting onto the door, which is hinged to move between the open and closed positions relative to the door frame; an operating assembly (30) which is coupled to the fixing assembly (10) and fitted into the drive assembly (20); during the movement, a rebounding drive mechanism (45) is arranged to apply a driving force to the operating assembly (30) in such a way that it moves the operating assembly toward one end of the range of motion and thus pulls the fixing assembly (10) and the drive assembly (20) together, so that when the door closing mechanism is installed, it pulls the door into the closed position relative to the door frame. This is made special by having a rebounding thrust mechanism (92) which is arranged to provide the increased thrust to the operating component (30) and a control mechanism (88-105) in which the thrust mechanism (85) is in an operating state to provide the increased thrust to the operating component (30) at a specified portion of the range of motion at one end of that range of motion and corresponding to the movement of the gate in the final portion of the motion into its closing position. 2. The door closing mechanism under claim 1, which the control mechanism (88-105) affects the specified portion of the movement into the closed position, as well as the portion of the movement until reaching the specified portion at least. 3. A door closing mechanism under claim 1 or claim 2, in which such pushing mechanism (85) contains one or more spring elements (92) with a higher rate than such rebounding driving mechanism (45). 4. The door closing mechanisms under claim 3, in which both the driving mechanism (45) and the pushing mechanism (85) shall consist of one or more coiled compression springs (45,92). 5. The door closing mechanism under claim 1 or claim 2, such control mechanism (88-105) shall have a locking and releasing mechanism (103) arranged to hold the push mechanism (85) under stress throughout the range of motion of the assembly in operation (30), in addition to the specified parts of the said range. 6. The door closing mechanism according to claim 5, such pushing mechanism (85) shall have a compression spring (92) positioned within the pilot assembly (90) which is coupled to the said operating assembly (20) and is movable along a fixed shaft (28), and such locking and releasing mechanism (103) shall be provided on the conveying assembly (100) which is maintained within the said pilot assembly (90) to brace against one end of the said compression spring (92) and is movable along a fixed shaft (28) and is positioned within the said pilot assembly (90) to allow limited movement along the length of that section, where the locking and releasing mechanism (103) shall be connected in an internal recess (95) created within the said pilot assembly (90) to hold the compression spring (92) in a compressed state. and will be released from its position of connection to the internal recess (95) to release the compression spring (92) to a predetermined position along the shaft (28) in order to apply the increased thrust to the operating assembly. 7. The closing mechanism pursuant to claim 6, which the locking and releasing mechanism (103) is capable of being released from the position of connection to the internal recess (95) in the pilot assembly (90) to enter the position of connection to the external recess (89) constructed in the shaft (28) in order to hold the conveyor assembly (100) in a predetermined position on the shaft (28). 8. The closing mechanism according to claim 7, which is the mechanism for locking and releasing, shall consist of a number of balls (103) positioned at one or more transverse holes (102) created in the conveyor assembly (100). 9. The closing mechanism under claim 8 shall have each ball (103) having a diameter greater than the radial gap between the shaft (28) and the pilot assembly (90) so that the ball is held either by the shaft (28) in the internal recess (95) in the pilot assembly (90) or by the pilot assembly (90) in the external recess (89) in the shaft (28). 10. The gate closing mechanism pursuant to claim 9, in which the bore (102) to which the ball (103) is positioned, shall be constructed with an inner radial section (104) of a diameter capable of accommodating a ball of small clearance and an outer radial section (106) of a larger diameter, with the two sections converging at an inner shoulder (105) which shall be positioned at a clearance from the shaft (28) less than the radius of the ball (103). 11. A door closing mechanism under any of the claims shall have a vibration damper (50) provided to control the rate of movement of the door toward the closing position. 12. The door closing mechanism according to claim 11, in which the vibration damper (50) shall consist of a sliding cylinder (52) containing a pressurized fluid and coupled to the said operating assembly (30), a piston rod (27) supporting a fixed piston (51) which divides the cylinder (52) into two chambers (65,66), and a flow restriction mechanism (70-83) which restricts the flow rate of the pressurized fluid from one chamber to the other in one direction of fluid flow in response to the movement of the said cylinder (52) relative to the said fixed piston (51). 13. The gate closing mechanism under claim 12, which is a mechanism for restricting the flow, shall have an adjustable compression chamber, which shall consist of two elements (72,82) in a combination, in which the flow restriction imposed on the compressed fluid shall be varied by the relative positional adjustment of the two compression elements, and an adjustment assembly (81) shall be provided to allow the compression element to be adjusted relative to the other element in order to vary the flow restriction imposed on the compressed fluid. 14. The gate closing mechanism pursuant to claim 13, in which the flow restriction mechanism shall be integrated with such piston (51), and the piston rod (27) and adjustment assembly shall have an operating element (83) which is accessible from one end of such piston rod (27). 15. The closing mechanism according to claim 14, in which the adjustment assembly (81) is made up of a shaft positioned axially within the bore (75) that is built into the piston rod (27), has an external threaded section that is connected to the internal threaded section of the piston rod, in which the rotation of the shaft (81) varies its axial position within the bore (75). 16. The gate closing mechanism according to claim 15, at one end of such shaft (81) there shall be a part that forms a needle (82) which shall contain such compression elements to act in conjunction with the orifice valve (72) which is determined by another of such elements, and at the other end there shall be a part that forms a head (83) in which the shaft may be rotated. 17. Any of the door closing mechanisms under claims 10 through 16, such pushing mechanism (92) and such driving mechanism (45) shall consist of two elements placed symmetrically to the two vibration damping mechanisms (50). 18. The door closing mechanism, which has the following components: an actuator assembly (20) fitted to fit within the thickness of the door and which has a fitting for securing to the door edge surface where the door will be hinged; a tensioning assembly (10) fitted to fit into the door frame facing against that door edge surface; a sliding operating assembly (30) which moves within the actuator assembly (20) under the action of a spring mechanism (45) and engages with the tensioning assembly (10) so that the spring mechanism (45) pulls the actuator assembly (20) and the tensioning assembly (10) together, so that when the closing mechanism is installed, it pulls the door toward and into a closed position relative to the door frame; a fluid-filled vibration damper (50) engaged with the operating assembly (30) and arranged to control the rate of movement of the operating assembly under the force of the spring mechanism (45) at least in the door closing direction. A regenerative thrust mechanism (92) is arranged to provide an increased thrust to the aforementioned operating component (30), and the control mechanism (88-105) by which the thrust mechanism (92) is in an operating state to provide the increased thrust to the aforementioned operating component (30) at a specified section of the range of motion at one end of the range of motion and corresponds to the movement of the gate in the final section of the motion to its closing position.