KR20070049227A - Device for the safety stop of an elevator car - Google Patents

Abstract

The device 1 according to the invention for the safe stopping of the elevator car 3, in particular in an elevator without machine room and with a small free space at the top 4 and / or bottom 6 of the passage in normal operation, And at least one box 9, 9 ′ mounted to the passage alongside the speed limiting cable 5 of the car overspeed safety device and provided with articulated fork elements 15, 15 ′, the fork element Engage at least one attachment element (21, 23) tied to the speed limiting cable (5) of the car overspeed safety device (7) at the service position of the device to detain the cable to cause a safe stop of the elevator car (3). And in the non-operational position the ends are arranged to be separated from the attachment elements 21, 23, the fork element 15 and the cable attachment elements 21, 23 in the service position being attached elements 21, 23. ) Is engaged with the fork element 15 Cultivators and in the elevator passage to leave a safety space for the operator of the at least Kevin roof 37 or the floor passage (6) held by the appropriate height within the car, characterized in that the passage positioned at the appropriate height in combination with each other.

Description

DEVICE FOR THE SAFETY STOP OF AN ELEVATOR CAR

The present invention relates, in particular, to an apparatus for the safe stop of an elevator car in an elevator without a machine room and an elevator having the same.

Elevators having no machine room and reduced space at the top of the aisle and possibly at the bottom of the aisle are known to require additional means to maintain a safe space on the car, especially for maintenance technicians working on the cabin roof.

To achieve this, a mechanical car detaining device is known, which includes a device having a rod extending manually towards a stop at a given height, limiting the safety space for the maintenance technician on the cabin roof. However, this type of device creates a large and dangerous contact stress on the elevator structure.

1 is a schematic view of an elevator with a device according to the invention.

2 shows a box of the device according to the invention in an inoperative position.

3 shows a box in service location.

Figure 4 shows the box of the device with the spring compressed when the elevator is stopped.

The present invention aims to solve this disadvantage, and in particular proposes a device for the safe stopping of an elevator car in an elevator which does not have a machine room and has a small free space at the top and / or bottom of the passageway during normal operation, It includes at least one box mounted to the passageway and parallel to the speed limiting cable of the car speed limiting device, the box engaging the at least one attachment element which is tied to the speed limiting cable of the car speed limiting device at the service position of the device. Restraining the elevator car to provide a safe stop of the elevator car, and an articulated fork element having an end adapted to be detached from the attachment element in the non-operational position, wherein the fork element and the cable attachment element in the service position are properly Detain and write down the elevator car at the height Cabin for the roof or to the engagement of the attachment element and the fork element so as to leave a safety space for the operator of the bottom passage is located at an appropriate height in combination with each other in the elevator path.

The attachment element advantageously has the shape of an olive, but any rigid element forming a protrusion that can engage the end of the fork element may be suitable.

The box may be mounted to slide vertically with respect to the passageway at a small height while being returned by the spring at the reference height within the passageway, but the fork element may differ in the stopping distance of the car and thus the stopping distance of the speed limiting cable attached thereto. In order to compensate for the difference, it is advantageously mounted, for example by two springs, with respect to the two vertical posts, to be slid vertically in the box and returned by the spring at the reference height. This sliding height of the box or this sliding height of the support element of the fork element is slightly longer than the longest safety stop of the car. Safety spaces for operators of cabin roofs take this longer stopping distance of the car into account. Thus, the height of the safety space in the passage corresponds to the engagement height of the attachment and fork elements on the cable plus the longest car stop distance.

The service position of the device can be activated by directly operating the switch to inspect the elevator as soon as the operator enters the cabin loop, or as soon as the door is opened, or when the door is opened, or a safety service switch embedded in the lock. Obtained automatically using

The fork element is, for example, a longitudinal plate, which may be rectangular, hinged to the face of the box with a motor drive, to receive the speed limiting cable with a small clearance and to engage with the attachment element, preferably outside Has a slit end that is flared.

The box includes a vertical passageway for the speed limiting cable formed by appropriate cutouts in the structural wall.

The fork element is moved to the service position by an electromagnet with a suitable power source to move the fork element towards the speed limiting cable and to receive the cable at its end of the fork or open slot shape, and the cable in the non-operating position of the device. Separate from

Advantageously the fork element is hinged about its articulation axis with the rear mass facing the fork end, and in operation comes to a horizontal position which is the original engagement position with the speed limiting cable, thus providing no powered electromagnets. A position inclined from the speed limiting cable under the thrust of the operating element of the electromagnet which is in contact with the operating element of the electromagnet powered by a switch, for example a limiting switch for inspection, located slightly downstream of the safety zone when not in operation The electromagnet is operated as the car enters the safety zone of the passageway during normal operation. In this configuration, the electromagnet does not need to be powered except during the upper safety course, the electromagnet can be activated and any interruption can be avoided, and in the event of a power failure the device will of course return to the safe position.

Of course, the device may comprise another attachment element, for example a second attachment element located slightly below the first attachment element, with a longer safety distance from the cabin roof to the aisle ceiling according to a given specification, In this case the device has double upper safety measures. Likewise, the device is provided with at least one attachment element in the lower safety zone of the passage at the floor, to prevent the operator from colliding with the speeding elevator car at the passage floor.

The invention also relates to an elevator equipped with a car safety stop as described above.

The invention is illustrated by the following exemplary embodiments with reference to the attached drawings.

Referring to FIG. 1 in particular in the drawings, the safety stop device 1 for the elevator car 3 according to the present illustrated embodiment is installed in an elevator having a small free space at the top and bottom of the passage. This device makes it possible to maintain a safe space for maintenance technicians on both the top 4 and the bottom 6 of the passage.

This device is accompanied by a speed limiting cable 5 of the car overspeed safety device 7 which operates during both the raising and the lowering of the car.

The device comprises two boxes for controlling the safe stopping of the car, one box 9 for the top of the shaft and the other box 9 'for the bottom of the passageway. These boxes 9, 9 ′ are identical and are arranged side by side with the speed limiting cable 5 of the car safety device which is received in the cable passage 11 formed by the appropriate cutouts of their upper and lower walls. They are attached directly to the wall 13 of the passageway, possibly by cross members, or directly to the car guide rail by suitable support elements.

Each box 9, 9 ′ is provided with a fork element 15, 15 ′ hinged to its plane inside the box. These fork elements 15, 15 ′ are in the form of rectangular plates and have a fork-like end 17 with slots outwardly directed towards the inside of the box. This fork end accommodates the speed limiting cable 5 with a gap when the fork element is in the horizontal service position (Fig. 3), and the non-operational position inclined by the floor electromagnet 19 mounted on the box. 2) to be disconnected from the cable when driven.

The speed limiting cable 5 has two olive shaped attachment elements 21, 23 protruding on the cable 5 while engaging the fork shaped end 17 of the fork element when the fork element is in the horizontal service position. Is provided. This engagement of the olive and fork causes a tug of the cable 5, the operation of the overspeed safety device 7 and thus a safe stop of the car 5.

Each fork element 15, 15 ′ of the box is provided with a mass opposite the fork shaped end 17, which naturally brings the fork element in a horizontal position, thus providing a fork shaped end 17 at the upper contact element 27. ) And the opposite end is placed on the pusher element 29 of the bottom electromagnet 19. When powered, the electromagnet 19 uses its pusher element 29 to push the fork element 15 to an inclined position to move away from the speed limiting cable 5. The fork element 15 and the electromagnet 19 are mounted on a support 31 which is vertically movable and slides along two lateral vertical posts 33 attached to the box. This support 31 is held in the lower position by elastic recovery by two identical helical springs 35 which are inserted over the upper part of the post 33 between the upper wall of the box and the appropriate fold of the support.

The sliding movement of the support 31 in the box is designed with a maximum value of 50 cm, which is attached to the speed limiting cable 5 by the safety device 7 and thus by the connecting lever 34. It corresponds to the longest stopping distance of the elevator car 3. In the inspection mode, when the car moves at a low speed (about 0.3 m / s), the car is the same due to a short movement of about 2 to 3 cm of the support 31 in the box and thus less compression of the return spring 35. Stop past the distance (Figure 4).

The speed limiting cable has the two olives spaced apart from each other, the upper olive 23 controls the stopping of the car with a minimum safety space of at least 1 m height between the car roof 37 and the aisle ceiling 4, The lower olive 21 allows the operator to stand upright on the cabin roof 37 so that the car has a larger safety space with a free height of about 2 m between the car roof 37 and the aisle ceiling 4. To control the stop.

The upper safety stop control box 9 is arranged at a defined height in the passage with respect to the olives 21, 23 with respect to the speed limiting cable 5, so that the stop control of the fork element 15 by each olive is The safety space is provided taking into account the sliding displacement in the box.

The lower box 9 ′ is lowered to provide a safe space for the operator at the passage floor 6 to a height of, for example, 0.50 m between the car floor 39 and the passage floor 6 when at the proper height in the passage. It works in conjunction with the olive (21).

The upper box 9 and the lower box 9 ′ respectively operate in conjunction with an inspection limit switch, an upper switch 41 mounted on the cabin roof and a lower switch 43 mounted on the cabin bottom 39. The upper switch 41 includes a movable lever 45, which has a lateral wheel which is leaned by a spring on a vertical longitudinal cam 47 attached to the cabin roof 37 and attached to the elevator passageway. The lever 45 leaning against the cam 47 corresponds to a closed circuit position in which the electromagnet is powered during normal operation to incline the fork element 15 to separate the fork element 15 from the speed limiting cable 5. do. When the switch is not in contact with the cam 47, the circuit is opened and the fork element 15 can then return to the horizontal service position of the device.

The lower switch 43 likewise comprises a lower wheel lever 49, which cooperates with the lower vertical longitudinal cam 51 on the passageway to close the electromagnet circuit when leaned on the cam and open the electromagnet circuit when not in contact. .

The function of the box is also controlled by a main inspection switch (not shown) which is operated by the operator prior to inspection, and a series of landing door opening safety switches in the elevator which activate the safety device as soon as any landing door of the elevator is opened ( Not shown). The switch can be mounted in series with the box control circuit.

The operation of the apparatus will now be described and will be readily understood on the basis of the description below.

The maintenance worker pushes the main inspection switch. The safety device 1 is then activated to stop the operation of the electromagnet 19 in each of the upper and lower boxes 9, 9 ′ throughout the travel distance of the car 3, and the fork element 15 causes the speed limiting cable ( 5). The car moves at low speed (about 0.3 m / s). At the end of the inspection movement, the limit switch 41 or 43 opens the elevator control circuit and the car stops. The safety device 1 is only activated when this process is carried out abnormally. If the car continues to move upwards, for example, the fork element 15 of the upper box catches the lower olive 21 of the safety device cable to release the safety device. By activating and detaining the car at the first safety barrier of the device, a space of about 2 m height is provided between the cabin roof 37 and the passage ceiling 4. If an accident misses the lower olive 21, the upper olive 23 is caught by the fork element 15 to ensure that the second safety barrier provides a minimum safety space for the operator.

After the maintenance work is performed and as soon as the main inspection switch stops operating and all elevator landing doors are closed, the device 1 returns to the normal elevator operation described above, and the electromagnet 19 for driving the fork element 15. Is powered only when the elevator car enters the upper and lower portions of the passageway.

It should be noted that the fork element of the device can also engage directly with the lever of the overspeed safety device to detain the elevator car.

Claims (16)

It is an apparatus 1 for the safe stop of the elevator car 3, especially in an elevator without machine room and with a small free space at the top 4 and / or bottom 6 of the passageway during normal operation, And at least one box 9, 9 ′ mounted to the passage alongside the speed limiting cable 5 of the car overspeed safety device and provided with articulated fork elements 15, 15 ′, the fork element Engage the at least one attachment element (21, 23) tied to the speed limiting cable (5) of the car overspeed safety device (7) at the service position of the device to detain the cable and cause a safe stop of the elevator car (3) , In the non-operational position, having an end 17 adapted to be separated from the attachment element 21, 23, the fork element 15 and the cable attachment element 21, 23 in the service position being attached element 21. , 23 is engaged with the fork element 15 to detain the elevator car at an appropriate height in the passageway, leaving the appropriate height combined with each other in the elevator passageway, leaving at least a safe space for the operator of the Kevin roof 37 or the passage floor 6. Device for secure stopping of the elevator car, characterized in that position. 2. Elevator car according to claim 1, characterized in that the attachment elements 21, 23 are in the shape of olives or any rigid element forming a protrusion that can engage the end 17 of the fork element 15. Device for safe stopping. The box 9, 9 ′ according to claim 1, in order to compensate for the difference in the stopping distance of the car 3 and the speed limiting cable 5 attached thereto. Device for secure stopping of the elevator car, characterized in that it is mounted so as to be slid, and is returned by the spring (35) at a reference height in the passage. The support 31 of the fork element 15, 15 ′ according to claim 1, in order to compensate for the difference in the stopping distance of the car 3 and the speed limiting cable 5 attached thereto. A device for safe stopping of an elevator car, characterized in that it is mounted to slide in a vertical direction in the boxes (9, 9 ') and is returned by a spring (35) at a reference height in the passage. 5. The sliding height of the boxes 9, 9 ′ or the sliding height of the support 31 of the fork element is slightly longer than the longest safe stopping distance of the car 3, according to claim 3 or 4. The safety space for the operator is thus a device for safe stopping of an elevator car, characterized in that it takes into account the stopping distance of the longer car (3). 6. The service position according to any one of claims 1 to 5, wherein the service position of the device is as soon as the operator enters the cabin roof 37 by actuating the actuation switch directly to inspect the elevator, or as soon as the landing door is opened. A device for safe stopping of an elevator car, characterized in that it is automatically obtained using a safety service switch embedded in its lock or a safety service switch which is activated when the door is opened. The fork element (15, 15 ') is a longitudinal rectangular plate which is hinged with the motor drive (19) on the faces of the boxes (9, 9'), Apparatus for a safe stop of an elevator car, characterized in that it has a slit end (17) which is spaced outwardly to receive the speed suggesting cable (5) with a small gap and to engage the attachment element (21, 23). 8. The fork element (15, 15 ') is transferred to the service position by an electromagnet (19) with a suitable power source, which moves the fork element (15) towards the speed limiting cable (5). A fork-shaped end (17) to receive the cable and to disconnect the cable from the inoperative position of the device. 8. The fork element (15, 15 ') is hinged about the articulation axis with the rear mass (25) opposite the fork end (17), so as to drive with the speed limiting cable (5). Come in a horizontal position, the original engagement position, overlying the actuating element 29 of the unpowered electromagnet 19 and positioned slightly downstream of the safety zone, for example an inspection limit switch, Under the thrust of the actuating element 29 of the electromagnet 19 powered by the same switch 41, 43, it is separated from the speed limiting cable 5 into an inclined position, the electromagnet 19 in normal operation. A device for the safe stopping of an elevator car, characterized in that it is activated as the car (3) enters the safety zone of the passageway. 10. The box according to claim 1, wherein the boxes 9, 9 ′ comprise vertical passages 11 for the speed limiting cable 5 formed by appropriate cutouts in the structural walls. For safe stopping of elevator cars. 11. A second, as claimed in any one of the preceding claims, located slightly lower than the first attachment element (23) with a longer safety distance from the cabin roof (37) to the passage ceiling (4) according to a given specification. An attachment element (21), in which case the device has double safety measures. 12. The elevator car according to any one of the preceding claims, wherein at least one attachment element is installed at the floor in the lower safety zone of the passageway to prevent the operator of the passage floor 6 from colliding with the elevator car. Device for safe stop. 13. A two-way speed limiting cable (5) of a car overspeed safety device for stopping the elevator car during both ascent and descent, and comprising two for controlling the safety stop of the car. Comprising boxes 9, 9, ′, one box 9 for the top of the passageway, the other box 9 ′ for the bottom of the passageway, each box at least at the top of the passageway (4) and the device for the safe stop of the elevator car, characterized in that each provides a safety space to the floor (6). 14. The upper box 9 and lower box 9 'operate in conjunction with the limit switch for inspection, the upper switch 41 is mounted to the cabin roof 37, and the lower switch 43 is Mounted on the cabin floor 39, the upper switch 41 includes a movable lever 45 attached to the cabin roof 37, which moves the fork element by powering the electromagnet 19 in the normal elevator position. The spring is leaned against the vertical longitudinal cam 47 attached to the passage in the closed circuit position to separate the fork element from the speed limiting cable 5 by tilting the 15, and the circuit is opened so that the fork element 15 The contact with the cam 47 is interrupted to allow it to return to the horizontal service position of the device, and likewise, the lower switch 43 cooperates with the lower vertical longitudinal cam 51 on the passageway when leaned on the cam and the electromagnet circuit (19) Closed, electromagnet when not in contact And a lower wheel lever (49) for opening the circuit (19). The elevator according to claim 1, wherein the fork elements 15, 15 ′ engage the levers of the overspeed safety device 7 to detain the elevator car 3. Device for safe stopping of the car. Elevator, characterized in that the car safety stop control device (1) according to any one of the preceding claims.