The present invention relates to a doorway device for an elevator, for opening/closing a doorway of an elevator, which makes a connection between a car and a landing, by using an elevator door.
In a conventional doorway device for an elevator, a sill frame body for guiding a door may be disposed below a surface of a floor in order to make an improvement in design. A bottom edge extending vertically downward while bypassing the floor is fixed to a lower portion of the door. A lower door guide movable in a moving direction of the door is disposed within a slot of the sill frame body. A guiding/holding bracket extending horizontally toward the bottom edge is fixed to the lower door guide. The guiding/holding bracket is connected to the bottom edge below the surface of the floor (see Patent Document 1).
Further, patent document 2 discloses a lift shaft door with two panels, wherein one panel is provided on the lift-shaft side and the other panel is guided at the underside of the first panel. Further, a sliding shoe is arranged on the first panel and guided in a rail, wherein there is provided a guide piece at the bottom as a lateral guide for the first panel.
Moreover, patent document 3 teaches an elevator door sill assembly having sliding doors. The assembly comprises a sill plate, a support sill located below the sill plate having a rail that presents an inboard sliding surface and an outboard sliding surface. Further, a first guiding surface that engages the inboard sliding surface and a second guiding surface that engages the outboard sliding surface is provided, so that the bottom of the elevator door is prevented from swinging while the door slides.
In the conventional doorway device for the elevator constructed as described above, however, the bottom edge fixed to the door extends vertically downward, so the horizontally extending guiding/holding bracket is necessary for mounting the lower door guide to the bottom edge. The number of parts is thus increased, so the cost of production cannot be reduced.
The present invention has been made to solve the problem discussed above, and it is therefore an object of the invention to obtain a doorway device for an elevator allowing an improvement in design and a reduction in the cost of production based on a reduction in the number of parts.
A doorway device for an elevator according to the present invention includes: a doorway floor member disposed in a lower portion of a doorway that makes a connection between a car and a landing, and extending in a width direction of the doorway; an elevator door provided above the doorway floor member, for opening/closing the doorway; a sill provided with a groove portion extending in the width direction of the doorway and provided below the doorway floor member; and a door leg having an insertion body inserted into the groove portion and a coupling member, assuming a shape in which the coupling member straddles the doorway floor member, for coupling the elevator door to the insertion body, and provided at a lower end of the elevator door.
Preferred embodiments of the present invention will be described hereinafter with reference to the drawings.
A support member 5 extending from the landing 1 toward the hoistway 3 is fixed on the floor of the landing 1 by means of anchor bolts. A doorway floor member 6 provided in a lower portion of the landing doorway 4 is fixed to the support member 5. The doorway floor member 6 is disposed at an end of the floor plate 2. The doorway floor member 6 extends in a width direction of the landing doorway 4. The doorway floor member 6 exhibits higher rigidity than the floor plate 2. The doorway floor member 6 is rigid enough to prevent any damage thereof through a collision with a carriage or a passenger.
A pair of landing doors 7 for opening/closing the landing doorway 4 are provided above the doorway floor member 6. Each of the landing doors 7 is reciprocatingly movable in the width direction of the landing doorway 4. The landing doorway 4 is opened/closed through reciprocating movements of the landing doors 7.
A landing sill 8 extending in the width direction of the landing doorway 4 is provided below the doorway floor member 6. The landing sill 8 is supported by a support member 9, which is fixed to a lateral wall of the hoistway 3 by means of anchor bolts. The landing sill 8 is fixed to the support member 9 by means of bolts. The landing sill 8 is provided with a groove portion 10 having an open top. The groove portion 10 extends in the width direction of the landing doorway 4.
A plurality of (two in this example) door legs 11 are provided at a lower end of each of the landing doors 7. Each of the door legs 11 has an insertion body 12 inserted into the groove portion 10, and a coupling member 13 for coupling the insertion body 12 to a corresponding one of the landing doors 7.
The insertion body 12 has a door guide shoe 14 disposed within the groove portion 10, and a shoe mounting portion 15 provided in an upper portion of the door guide shoe 14, for mounting the insertion body 12 to the coupling member 13.
The coupling member 13 assumes such a shape as to extend from the lower end of each of the landing doors 7 to the insertion body 12 so as to straddle the doorway floor member 6. In other words, the coupling member 13 assumes such a shape as to extend from a space above the doorway floor member 6 to a space below the doorway floor member 6 through the hoistway 3 side thereof while bypassing the doorway floor member 6 (
The upper mounting portion 16 is provided with a plurality of vertically extending long holes 19. The respective long holes 19, which are arranged while being vertically spaced apart from each other, are formed through the upper mounting portion 16. The upper mounting portion 16 is fixed to the lower end of each of the landing doors 7 by means of a plurality of bolts 20 serving as fixing means, which are passed through the long holes 19, respectively. A vertical position of the coupling member 13 with respect to the each of the landing doors 7 can be adjusted through positional adjustment of the bolts 20 with respect to the long holes 19. A vertical position of the insertion body 12 with respect to the groove portion 10 can be adjusted through positional adjustment of the coupling member 13 with respect to the each of the landing doors 7.
The lower mounting portion 17 is provided with a plurality of bolt holes 21. The shoe mounting portion 15 is fixed to the lower mounting portion 17 by means of bolts 22 that are screwed into the bolt holes 21, respectively.
The joint portion 18 has an upper horizontal portion 23 extending horizontally from a lower end of the upper mounting portion 16, a lower horizontal portion 24 extending horizontally from an upper end of the lower mounting portion 17, and a vertical portion 25 connecting the upper horizontal portion 23 to the lower horizontal portion 24. The upper horizontal portion 23 is disposed above the doorway floor member 6, and the lower horizontal portion 24 is disposed below the doorway floor member 6. The vertical portion 25 is disposed on the hoistway 3 side with respect to the doorway floor member 6 (
The coupling member 13 is provided, at an upper portion thereof and a lower portion thereof, with an upper reinforcing rib 26 and a lower reinforcing rib 27, respectively, for reinforcement. The upper reinforcing rib 26 is fixed between a lateral surface of the upper mounting portion 16 and an upper surface of the upper horizontal portion 23. The lower reinforcing rib 27 is fixed between a lateral surface of the lower mounting portion 17 and a lower surface of the lower horizontal portion 24.
Though not shown in the drawings, a car to be raised/lowered within the hoistway 3 is provided with a car doorway for allowing a passenger to get on and off the car. The car is mounted with car doors for opening/closing the car doorway. The car doors are driven by a motor mounted on the car, and thereby being moved reciprocatingly. The car doorway is opened/closed through reciprocating movements of the car doors. Each of the landing doors 7 is allowed to engage with a corresponding one of the car doors by an engaging device when the car is stopped at each floor. Each of the landing doors 7 can reciprocatingly move together with a corresponding one of the car doors through engagement by means of the engaging device.
The doorway for the elevator, which makes a connection between the car and the landing 1, has the car doorway and the landing doorway 4. An elevator door for opening/closing the doorway of the elevator has the car doors and the landing doors 7.
In the doorway device for the elevator constructed as described above, the landing doors 7 are provided above the doorway floor member 6, and the landing sill 8 is provided below the doorway floor member 6. Each of the door legs 11 provided at the lower end of a corresponding one of the landing doors 7 has the insertion body 12 inserted into the groove portion 10 of the landing sill 8, and the coupling member 13, that assumes such the shape as to straddle the doorway floor member 6, for coupling the insertion body 12 to the corresponding one of the landing doors 7. Therefore, the landing sill 8 as a cause of a deterioration in design can be hid by the doorway floor member 6, so an improvement in design can be achieved. The coupling member 13 assumes such the shape as to straddle the doorway floor member 6, so the number of parts for coupling each of the landing doors 7 to the insertion body 12 can be reduced. As a result, the cost of production can be reduced.
The groove portion 10 provided in the landing sill 8 has the open top, so the existing landing sill 8 can be directly disposed below the doorway floor member 6. In consequence, the present invention can be easily applied to the existing doorway device for the elevator.
Further, the position of the coupling member 13 with respect to each of the landing doors 7 can be adjusted, and the position of the insertion body 12 with respect to the groove portion 10 is adjusted through positional adjustment of the coupling member 13 with respect to each of the landing doors 7. Therefore, an amount of insertion of the insertion body 12 into the groove portion 10 can be adjusted at a position above the doorway floor member 6. Thus, an operation of adjusting the amount of insertion of the insertion body 12 into the groove portion 10 can be performed from the inside of the car or the landing 1 with ease.
In addition, the doorway floor member 6 exhibits higher rigidity than the floor plate 2, so the doorway floor member 6 can be prevented from being damaged etc. through a collision with a carriage or the like. As a result, the doorway device for the elevator can be prevented from deteriorating in design.
Further, the coupling member 13 is mounted to the lower end of each of the landing doors 7 by means of the plurality of the bolts 20 that are arranged while being vertically spaced apart from each other. Therefore, a portion of the coupling member 13, which is mounted to each of the landing doors 7, that is, the upper mounting portion 16 can be made less deformable.
Note that, in the foregoing example, the doorway floor member 6 is provided in the lower portion of the landing doorway 4, and each of the door legs 11, which is inserted in the groove portion 10 so as to straddle the doorway floor member 6, is provided at the lower end of a corresponding one of the landing doors 7. However, it is also appropriate that the doorway floor member 6 is provided in the lower portion of the car doorway, and that the door legs 11 are provided at the lower ends of the car doors for opening/closing the car doorway, respectively. In this case, a car sill provided with a groove portion into which the door legs 11 are inserted is disposed below the doorway floor member 6.
The stopper 31 has a fixed portion 33 fixed horizontally on the landing sill 8, and an abutment portion 34 extending upward from an end of the fixed portion 33 on the hoistway 3 side. The lower reinforcing rib 27 is provided with an inclined portion 35 that can come into abutment on the abutment portion 34 due to displacement of the coupling member 13 in a direction away from the doorway floor member 6. The amount of displacement of the coupling member 13 in such the direction away from the doorway floor member 6 is restrained through abutment of the inclined portion 35 on the abutment portion 34. This embodiment is identical to Embodiment 1 of the present invention in other constructional details.
In the doorway device for the elevator constructed as described above, the landing sill 8 is provided with the stopper 31 for restraining the coupling member 13 from being displaced in the direction away from the doorway floor member 6. Therefore, a gradient of the landing doors 7 can be confined within a predetermined range when the landing doors 7 are inclined with respect to the doorway floor member 6. It is thus possible to prevent, for example, slippage of the insertion body 12 out of the groove portion 10, damage to the insertion body 12, and the like.
The coupling member 13 is provided with the lower reinforcing rib 27 for reinforcing the coupling member 13, and the coupling member 13 is restrained from being displaced through abutment of the lower reinforcing rib 27 on the stopper 31. Accordingly, a strength of the coupling member 13 can be increased, and the coupling member 13 can be restrained from being displaced in the direction away from the doorway floor member 6 with a simple construction.
The landing sill 8 is provided with the stopper 31 in the foregoing example. However, the car sill may be provided with the stopper when the doorway floor member 6 is provided in the lower portion of the car doorway and the car sill is provided below the doorway floor member 6. In this case, the door legs 11, which are inserted into the groove portion of the car sill so as to straddle the doorway floor member 6, are provided at the lower ends of the car doors, respectively. In this manner as well, the door legs 11 can be prevented from slipping out of the groove portion of the car sill with a simple construction.
In the foregoing embodiments of the present invention, while the insertion body 12 is fixed to the coupling member 13 by means of the bolts 22, the position of the coupling member 13 with respect to the elevator door can be adjusted. Therefore, it is also appropriate that the coupling member 13 and the shoe mounting portion 15 are provided as an integral member (i.e., single member), and the coupling member 13 is integrated with the insertion body 12.
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.