KR20030007073A - Coupling device between car doors and landing doors of an elevator, actuated by a motor which is independent of the drive motor of the doors - Google Patents

Abstract

PURPOSE: A coupling device between a car door and a landing door, actuated by a motor independent of a drive motor of an elevator is provided to use two different motors for opening and closing the coupling device and for moving the doors. CONSTITUTION: A coupling device between a car door(22) and a landing door of an elevator has two vertical structure sections(12,14) connected by upper and lower jointed connecting units(16,18). The vertical structure sections have L-shaped sections mounted to the car door. The coupling device includes a first DC-electric motor(66) to move the structure sections towards or away from each other at low speed; a movement transmission mechanism acting on the connecting units in a way of moving the structure sections towards or away from each other and converting a rotary motion of a shaft(72) of a first motor into a motion of an extending and contracting longitudinal direction; a mechanism including transmission unit driven by a second DC-electric motor, to move doors at faster speed; and a stiffness fastener connecting one side of a belt to the car door.

Description

COUPLING DEVICE BETWEEN CAR DOORS AND LANDING DOORS OF AN ELEVATOR, ACTUATED BY A MOTOR WHICH IS INDEPENDENT OF THE DRIVE MOTOR OF THE DOORS}

The present invention relates to a coupling device used to integrally connect a landing door and a car door of an elevator such that when the car doors are moved by a drive system, the landing door and the car doors of the elevator are simultaneously opened and closed.

A conventionally known coupling device will be described below. This device is schematically illustrated with reference to FIGS. 1 and 2.

The device 10 is connected by joints 21 and 23 on a support plate 20 which is parallel to each other and attached to the upper edge of the car door 22 and has two vertical structural sections 12 having an L-shaped cross section. 14). A helical spring 24 hooked to one of the backing plate and the structural section opens the articulated parallelogram formed by the structural sections 12, 14 and the levers 16, 18 to a position where the structural sections are separated. A pivoting pawl 25 having a pin 27 and loaded by a spring 29 is provided to keep the parallelogram open when the doors are opened and closed. For this purpose, the pin 27 is captured in a notch 31 formed at the end of the upper lever 16.

The upper lever has an inverted T-shape, and the end of the center leg 26 is driven by the fastener 28 and the circulation drive belt 30 wound around the drive pulley 32 and the idle pulley 36 by the motor 34. Is connected to the lower side of the. The drive mechanism is mounted to the roof of the car. Depending on the direction in which the belt 30 is driven, the parallelogram coupling device is moved from a closed position in which the structural sections are close to each other (Fig. 1) to an open position (not shown) in which the structural sections are separated.

In addition, the landing door 40 has a lock 42 formed by a fixing portion 44 supporting the fixing roller 46 and a movable portion 48 mounted to pivot on the fixing piece with respect to the horizontal pivot pin 50. It is provided on top of each layer. On one side of the pivot pin, the movable part supports the pivoting roller 52 at one end and the catch hole 53 at the other end. On one side of the pivoting roller, the movable part is placed in a stable position to receive the bolt 56 attached to the lintel 59 of the landing door with the movable part placed on the upper edge of the landing door and the catch hole in a high position. It is stabilized by the returning counterweight. When the movable part is in the stable position, the pivoting roller is at a distance substantially greater than the distance between the adjacent flanks 58, 60 of the structural sections 12, 14 in the closed position, In contrast to the counterweight when the movable portion is pivoted in the direction of the arrow f ₁ , the rollers 46, 52 and in a manner in which the pivoting roller rises and is horizontally separated from the fixed roller when the bolt 56 is released from the catch hole; Pivot pin 50 is positioned.

Fig. 1 shows the moment when the car C, which should stop in landing, descends in the direction of the arrow f ₂ as it approaches the landing P. Figs. During the lowering of the car, the coupling device is in the closed position, ie the rollers 52 of all locks where the structural section 12, 14 is found in another landing where the adjacent flanks 58, 60 (FIG. 2) intersect. 46) are close to each other so that they can pass through without problems.

When the car is locked at landing P, the elevator controller sends an operation command to the motor 34. The motor then rotates in the direction of arrow f ₃ at a very low speed to drive the belt 30 in the same direction. At this time, the upper lever 16 is pivoted in the direction of the arrow f ₄ to open the coupling device. The structural sections 12, 14 are separated so that their inner flanks 58, 60 are seated relative to the pivoting roller 52 and the stationary roller 46, respectively. At this time, the structural section 14 is fixed by the fixing roller 46 and cannot be moved. On the other hand, the structural section 12 moves further and pivots the movable portion 48 of the lock in the direction of the arrow f ₁ , thereby releasing the lock 42. In addition, the pins 27 of the pawl 25 are captured in the notches 31 of the lever 16 to fix the articulated parallelograms in the open position.

As already explained, the speed of the motor 34 during the first phase of motion should be very low to avoid the destructive impact of the structural sections 12, 14 and the accompanying noise.

When the lock is released, the landing door 40 is integrally connected with the car door 22. The controller then instructs the motor 34 to rotate at a higher speed. The car door and landing door move together in the direction of arrow f _{5 to} the open position.

The prior art coupling device described has the following disadvantages.

The motor 34 rotates at a low speed during the first period of time to form without impact the contact between the structural sections and the rollers of the lock, and at an accelerated speed for the doors to move together during the second period of time; It is expected to rotate. However, the performance of these predicted motors is limited because no motor is known that can be produced at a reasonable cost and that can rotate at two different speeds.

The presence of an inverted T-shaped upper lever 16 articulated on the support plate 22 and connected to the belt 30 is coupled to the upper part of the car door so that the coupling device is closest to the drive system. Force to mount. However, this is a limitation because there is less space available.

The present invention aims to correct these shortcomings, from which the idea of using two different motors, one motor for opening and closing the coupling device and the other motor for moving the doors for this purpose. depart.

Thus, the present invention has two vertical structural sections having an L-shaped cross section mounted on the car door and connected together by upper and lower articulated connecting means in such a way that the structural sections can be moved from a separated position to an adjacent position. A coupling device of the type comprising: a first dc electric motor for advancing or disengaging structural sections at low speed and acting on said connecting means in a manner to move the structural section to a disengaged or proximate position; And a mechanism for transmitting a movement for converting a rotational movement of the shaft of the first motor into a longitudinal stretching or contracting movement, an idler pulley rotated by the second electric dc motor, and a transmission belt wound around the driving pulley, A mechanism for moving the door at a higher speed, and a rigid fastener 92 connecting one side of the belt to the car door Include.

Thus, the opening and closing operations of the coupling device and the moving operations of the doors are performed by two different motors. It will be appreciated that it will be easy to select the first motor to perform its function with the best performance. For this purpose, a low power motor that rotates at low speed will be used to avoid the impact of the structural section on the roller of the lock and the resulting noise. Of course, it is necessary that this motor be economical so as not to excessively increase the cost of the coupling device. In addition, the motor should be light and not too bulky to be accommodated at any point on the car door. For example, it would be possible to choose dc motors that are commercially available in the automotive industry to operate windows of automobiles.

Similarly, the second motor will be chosen to obtain the best door movement performance. That is, the motor must be relatively powerful.

In addition, since the movement of the belt is transmitted directly to the landing door by a rigid fastener, there is no need for the upper lever to contact the drive belt as in the prior art described above.

Another advantage of the present invention is that the selection of the mounting position of the first motor is very free since the motor is supplied from the elevator controller by the conductor. Thus, the motor can be mounted at any position on the door, and can also be mounted at a position remote from the door drive mechanism.

According to another embodiment of the present invention applied to the above-described suspension coupling device, the rotation of the tubular nut 78 fixed for the axial movement, in which the axis of the first motor is screwed by the reduction gear, is screwed. As a result, when the threaded rod is moved in one or the opposite direction, the threaded rod connected by the interlocker to one of the levers, the upper or lower lever of the coupling device to pull or push the lever 18 Entering or retracting into the tubular nut results in the opening or closing of the coupling device.

According to a second embodiment of the invention, the coupling device is mounted to move vertically, parallel to the structural sections, two structural sections which can be separated or proximate, and screwed to the axis of the screwed first motor. Connecting rod assembly with in-moving tubular nut and knuckle joint connected by a joint on tubular nut and two structural sections, with knuckle joint along a threaded axis when the motor rotates in one or the opposite direction At least two collapsible connecting rods that cause axial movement of the tubular nut, causing folding of the components, thereby moving the structural sections together closely, or causing the unfolding of the connecting rod assembly with a knuckle joint, thereby separating the structural sections. An assembly.

1 is a schematic front view of an elevator installation with a suspension coupling device according to the prior art;

Figure 2 is a partial plan view of Figure 1 showing only two structural sections of the coupling device and two rollers of the lock of the landing door.

Figure 3 is a schematic front view of the first embodiment of the coupling device according to the present invention when the coupling device is in a closed state when suspended;

FIG. 4 is similar to FIG. 3, but with the coupling device open;

Fig. 5 is a schematic diagram showing the principle of operation of the coupling device according to the first embodiment of the present invention.

Fig. 6 is a schematic front view showing a second embodiment of the coupling device of the present invention when the structural sections move in parallel and vertically, and the coupling device is in a closed state.

Figure 7 is similar to Figure 6 but with a coupling device open.

8 is a schematic view showing the principle of operation of the coupling device according to the embodiment of FIGS. 6 and 7.

<Explanation of symbols for the main parts of the drawings>

10: coupling device

12, 14: structural section

16: upper lever

18: lower lever

22: car door

40: landing door

66: first motor

78: tubular nut

80: threaded rod

82: interlock

86: shock absorber

Two preferred embodiments of the present invention will be described in detail in view of the accompanying drawings.

1 and 2 have already been described, the first embodiment of the present invention shown in Figs. 3 to 5 will now be described. The description of the elements of these figures in common with the elements of the coupling device of FIG. 1 will not be repeated. Common elements will be referred to by the same reference numerals.

3 to 5, the opening and closing of the coupling device 10 is performed by a stand-alone instrument 62. This mechanism includes a lift controller not shown and a first dc motor 66 supplied by two leads 68, 70. The shaft 72 of this motor can be rotated in one direction or the opposite direction depending on the polarity of the supply current. The shaft 72 drives the reducing gear train schematically shown in FIG. Due to this, the reduction gear train rotates about the axial nut 78, which is in the form of a tube with internal threads. The threaded rod 80 is threaded to the tubular nut 78. One means, not shown, is provided to allow rotational movement of the tubular nut 78 and prevent axial movement. As a result, when the tubular nut is rotated in one direction or the opposite direction, the rod enters or retracts into the tubular nut.

One end of the interlock 82 is connected to the free end of the rod 80, and the other end coupled to one of the levers of the coupling device (in this case lever 18) is a joint 23 on the car door. And at another point 84.

The arrangement of the elements of the instrument 62 is such that the line of action of the rod 80 is parallel to the structural sections 12, 14, and the linkage 82 transfers a generally perpendicular force to the lower lever 18 or at least the lever ( Have a vertical component with respect to 18).

The operation of this coupling device is as follows. The coupling device is in the closed position shown in FIG. 3 when the car door reaches the floor. The controller supplies DC power to the first motor 66 to cause the rod 80 to rotate in the direction of entry into the tubular nut 78. The rod then pulls the lower lever 18 by the interlock 82 to open the coupling device as shown in FIGS. 4 and 5. Since the motor is a low output motor, this opening movement of the coupling device occurs smoothly at low speed so that no impact occurs on the rollers of the lock.

The impact can be further damped by a pneumatic or hydraulic shock absorber mounted between the fixed point 88 of the car door and, for example, one of the structural sections, such as point 90 of the structural section 12.

In the open position (FIG. 5) of the coupling device, the lock of the landing door is released as described above. The pin of the pawl 25 is coupled to the notch 31 of the upper lever 16. As a result, the coupling device remains in the open state shown in FIG.

The elevator controller then supplies a direct current control current to the second motor 34. This motor starts operation to drive the belt 30 in the opening direction of the doors. This movement is transmitted directly to the car door 22 by a rigid fastener 92 attached to one of the ends on the car door and the side of the belt 30. By movement in the open direction, the car door moves the landing door 40 along the car door in the same direction due to the stop of the left structural section 12 relative to the pivoting roller 52 of the lock. (See Figure 1)

Reverse operation necessarily occurs to close the elevator doors. The controller provides the reverse direction current to the second motor 34. This moves the car door 22 in the opening direction by the fastener 92. In this movement, the right structural section 14 rests on the locking roller 46 of the lock and moves the landing door integrally with the car door.

When the car door and the landing door are moved to the closed position, the fixing finger 94 mounted on the lintel of the car pivots the pawl 25 to release the upper lever 16. The controller supplies current of opposite polarity to the first motor 66, so that the rod 80 enters the tubular nut 78 and pulls the lower lever 18 to open the coupling device as shown in FIG. 3. Close it. The car then moves to another floor.

A second embodiment of the present invention will be described with reference to Figs.

The coupling device shown in FIGS. 6 to 8 has two rollers 104, 106, 108, 110 mounted to roll over two vertical sections 12, 14 mounted on the car door 22. Two vertical structural sections 12, 14 each having an provided L-shaped cross section.

The coupling device also includes a motion transfer mechanism for simultaneously moving the structural sections in a direction of approaching or separating from each other. This motion transfer mechanism comprises a dc motor 116 having a threaded shaft 118 one end screwed into a tubular nut 120 that is parallel to the structural sections 12, 14 and axially movable in the vertical direction. Include.

The tubular nut passes through two bushings 122, 124 permanently attached to the holes drilled in the rails 112, 114. Thus, depending on the direction in which the axis of the motor rotates, the tubular nut slides in the bushings 122, 124 away from the motor 116 (FIG. 6) or close to the motor.

The structural sections 12, 14 are connecting rod assemblies with a knuckle joint 126, preferably connected to the tubular nut 120 with two connecting rod assemblies per structural section. Each connecting rod assembly is formed of three levers joined by joints 128 and 130.

When the motor 116 rotates in the direction of the arrow in Fig. 6, the tubular nut 120 is released from the threaded shaft 118 away from the motor. In this movement, the connecting rod assembly with the knuckle joint is unfolded to move the structural section apart.

Also in this embodiment, the car door and the landing door are moved by a drive device including a dc motor 34 driving the belt 30. Rigid fasteners 92 connect one side of the belt to the car door.

According to the present invention, there is provided a coupling device between a car door and a landing door of an elevator, which is operated by a motor independent of the drive motor of the doors.

Claims (6)

Two sections having an L-shaped cross-section mounted together on the car door 22 and connected together by the upper and lower articulated connecting means 16, 18; 126 in such a way that the structural sections can be moved from a separated position to an adjacent position. In the coupling device between a car door and a landing door of an elevator having a vertical structural section (12, 14), A first dc electric motor 66; 116 for separating or moving the structural sections at low speed; Acting on the connecting means 16, 18; 126 in such a way that the structural sections 12, 14 are separated or in close proximity to one another, extending or contracting the rotational movement of the axes 72, 118 of the first motor. An exercise transmission mechanism for converting it into a longitudinal motion, A mechanism for moving the door at a higher speed, comprising delivery means (30, 36, 32) driven by a second dc electric motor (34); Coupling device, characterized in that it comprises a rigid fastener (92) for connecting one side of the belt (30) to the car door (22). Suspension coupling according to claim 1, wherein the two levers have two vertical structural sections (12, 14) connected by an upper lever (16) and a lower lever (18) in such a way that they form an articulated parallelogram. Applies to the case of devices, The shaft 72 of the first motor 66 causes the rotation of the fixed tubular nut 78 with respect to the axial movement, in which the threaded rod 80 is internally screwed by the reduction gear 78, As a result of the tubular nut being moved in one or the opposite direction, the threaded rod connected by the connecting rod 82 to one of the levers of the coupling device 18 to pull or push the lever 18 into the tubular nut. Coupling device characterized in that it enters or retracts to cause the coupling device to open or close. 2. The two vertical structural sections (12, 14) according to claim 1, which are mounted to move vertically and can be separated or in proximity to each other, A movable tubular nut 120 which is screwed and the shaft 118 of the first motor 116 is parallel to the structural sections, With a movable tubular nut and a knuckle joint connected by a joint on the two structural sections, the tubular nut 120 is screwed closer or away from the first motor when the motor 116 rotates in one or the other direction. At least two foldable connecting rod assemblies that move axially along the axial axis, The movement of the tubular nut causes the folding of the connecting rod assembly with the knuckle joint to move the structural sections close to each other or to unfold the connecting rod assembly with the knuckle joint, thereby separating the structural sections. Coupling device. 4. The rollers of claim 3, wherein each of the structural sections 12, 14 comprises two rollers 104, 106, 108, mounted to roll over two horizontal rails 12, 14 formed on the car door 22; A coupling device, characterized in that 110 is provided. The pin 27 is provided and the spring 29 is provided to hold the coupling device open when the door is opened or closed by trapping the pin in the notch 31 formed at the end of the upper lever 16. Coupling device, characterized in that a pivoting pawl (25) is provided which is loaded by 2. Coupling device according to claim 1, characterized in that a shock absorber (86) is mounted between one of the structural sections (12) and the fixing point of the car door to dampen the impact of the opening of the coupling device.