The present invention relates to a door operator installed in a hall or a car of an elevator.
Patent Literature 1 below discloses a technique for preventing an elevator door from getting out of place when an excessive force is applied to the door. Specifically, for the door operator described in Patent Literature 1, a plate member is arranged on the side surface of a door rail so that the plate member and the door rail face to each other with a narrow gap G being provided therebetween to prevent a hanger roller from coming off the door rail.
Patent Literature 1: Japanese Patent Laid-Open No.
For some elevators installed in high-rise buildings, the pressure in an elevator car is controlled to prevent ride comfort from being hindered by a change in atmospheric pressure. Also, in the case where an elevator hall is installed in a tunnel, when a vehicle moving at a high speed passes through it, the elevator door sometimes receives wind pressure.
When the door operator described in Patent Literature 1 is applied to such an elevator, the door is pushed by the pressure or the wind pressure, and there is a fear that the plate member may come into contact with the door rail. When the plate member comes into contact with the door rail, abnormal noise occurs when the door is opened or closed. Further, the running resistance of the door increases, so that the opening/closing movement of the door may be hindered.
As shown in
Also, reference sign 8 denotes a door shoe provided in the lower end portion of the door 1. The movement of the lower end portion of the door 1 is guided by the door shoe 8 arranged in a groove of a sill 4.
For the door operator configured as described above, when pressure is applied to the door 1, as shown in
The present invention has been made to solve the above-described problems, and an object thereof is to provide a door operator of an elevator that can restrain the displacement of a door properly even when an external force is applied to the door on account of wind pressure or the like.
A door operator of an elevator according to the present invention is a door operator according to claim 1.
Also, a door operator of an elevator according to the present invention is a door operator which comprises a door rail provided above an elevator entrance, a door for opening and closing the entrance, a door hanger for hanging the door, a hanger roller which is provided rotatably on the door hanger to guide the opening/closing movement of the door by means of rolling on the upper face of the door rail, a support body for supporting the door rail, a part of which is arranged along the door rail, and a displacement restraining device which is provided on the door hanger to restrain the door from being displaced to the vertical direction and the axial direction of the hanger roller. The displacement restraining device comprises a stabilizing roller which rotates while being in contact with the lower face of the part of the support body along with the opening/closing movement of the door, a first guide roller which rotates while being in contact with one side surface of the part of the support body along with the opening/closing movement of the door, and a second guide roller which rotates while being in contact with the other side surface of the part of the support body along with the opening/closing movement of the door.
Also, a door operator of an elevator according to the present invention is a door operator according to claim 3.
According to the door operator of an elevator in accordance with the present invention, the displacement of a door can be restrained properly even when an external force is applied to the door on account of wind pressure or the like.
The present invention will now be described in more detail with reference to the accompanying drawings. In the drawings, the same signs are applied to the same or equivalent elements, and duplicated explanation thereof is simplified or omitted as appropriate.
In
The opening/closing movement of the door 1 is guided by a door rail 3 and a sill 4.
The door rail 3 is supported on a support body 5 fixed to a predetermined fixing body. The support body 5 consists of a door support frame or a hanger case, and is fixed to, for example, a shaft wall or a shaft beam. The door rail 3 is arranged above the elevator entrance so as to be horizontal in the width direction of the entrance.
On the door hanger 2, a pair of hanger rollers 6 and a pair of stabilizing rollers 7 are provided so as to be rotatable in both directions.
Each of the hanger rollers 6 has a horizontal shaft in the direction perpendicular to the opening/closing direction of the door 1. That is, the shaft of the hanger roller 6 also intersects at right angles with the lengthwise direction of the door rail 3. The hanger roller 6 is placed on the door rail 3, and guides the opening/closing movement of the door 1 by means of the rolling on the upper face of the door rail 3.
The stabilizing rollers 7 are provided to restrain the vertical displacement of the door 1. Each of the stabilizing rollers 7 has a horizontal shaft parallel with the shaft of the hanger roller 6. The stabilizing roller 7 is arranged so that the upper end of the outer peripheral face thereof is in contact with the door rail 3 from the downside. Therefore, when the door 1 is opened or closed, the stabilizing roller 7 rotates while being in contact with the lower face of the door rail 3. That is, the stabilizing roller 7 and the hanger roller 6 hold the door rail 3 therebetween from the upside and the downside to prevent the occurrence of oscillation on the door 1.
The sill 4 is provided to guide the movement of the lower end portion of the door 1. The sill 4 is formed with a groove in the opening/closing direction of the door 1. The door 1 is provided with a door shoe 8 (not shown in
Reference sign 9 denotes a displacement restraining device provided in one side portion and the other side portion of the door hanger 2. The displacement restraining device 9 is provided to restrain the door 1 from being displaced to the axial direction of the hanger roller 6. The displacement restraining device 9 is disposed in the lower portion of the door hanger 2, that is, at a position close to the door 1.
In the following, the details of the displacement restraining device 9 and the support body 5 relating to the displacement restraining device 9 are explained.
The support body 5 takes, for example, an L shape as viewed from the side, and on one side surface of one plate-shaped member 5a arranged vertically, the door rail 3 is provided. The plate-shaped member 5a is arranged parallel along the door rail 3. Therefore, the lower end portion of the plate-shaped member 5a is also arranged horizontally along the door rail 3.
The essential portion of the displacement restraining device 9 is configured by a support member 10 and a pair of guide rollers 11 and 12.
The support member 10 is formed of, for example, a plate member bent into an L shape. One side of the L shape of the support member 10 is arranged in the vertical direction, and is fixed to the side end face of the door hanger 2. The other side of the L shape of the support member 10 is arranged in the horizontal direction slightly under the lower end portion of the plate-shaped member 5a.
The guide rollers 11 and 12 are provided on the other side of the support member 10 so as to be rotatable in both directions. Each of the guide rollers 11 and 12 has a shaft in the vertical direction. One guide roller 11 is arranged so that the outer peripheral surface thereof is in line contact with one side surface of the plate-shaped member 5a. Therefore, when the door 1 is opened or closed, the guide roller 11 rotates while being in contact with one side surface of the plate-shaped member 5a. The other guide roller 12 is arranged so that the outer peripheral surface thereof is in line contact with the back surface of the one side surface of the plate-shaped member 5a. Therefore, when the door 1 is opened or closed, the guide roller 12 rotates while being in contact with the other side surface (the back surface) of the plate-shaped member 5a. That is, the guide rollers 11 and 12 hold the lower end portion of the plate-shaped member 5a therebetween from the front side and the rear side, and restrains the door 1 from being displaced to the direction in which users go into and out of an elevator car (corresponding to the axial direction of the hanger roller 6).
Any door operator having the above-described configuration can restrain the displacement of the door 1 properly even if a horizontal external force is applied to the side surface of the door 1 on account of wind pressure or the like.
That is, for the door operator of this embodiment, the paired guide rollers 11 and 12 each having a shaft in the vertical direction are provided so as to hold the lower end portion of the plate-shaped member 5a therebetween from the front side and the rear side. Therefore, even if a horizontal external force is applied to the side surface of the door 1, the external force can be received by the plate-shaped member 5a, and the door hanger 2 is not tilted. As a result, the door 1 is not deformed.
The guide rollers 11 and 12 are in contact with the lower end portion of the plate-shaped member 5a by a line (or by a surface having a minute width). Also, the displacement restraining device 9 having the guide rollers 11 and 12 is provided on both sides of the door hanger 2 and at the position close to the door 1. Therefore, even if an excessive external force is applied to the door 1, the door 1 is not curved unlike the conventional example shown in
Further, since the horizontal external force applied to the door 1 is received via the guide rollers 11 and 12, even when the external force is applied to the door 1, the opening/closing movement of the door 1 is not hindered. Also, since the external force can be received stably by the guide rollers 11 and 12, there is no fear that abnormal noise may occur when the door is opened or closed, or the running resistance of the door 1 may increase.
In
The essential portion of the displacement restraining device 13 is configured by a support member 14 and a pair of guide rollers 15 and 16.
The support member 14 is formed of, for example, a plate member bent into an L shape. One side of the L shape of the support member 14 is arranged in the vertical direction, and is fixed to the side end face of the door hanger 2. The other side of the L shape of the support member 14 is arranged horizontally slightly under the door rail 3.
The guide rollers 15 and 16 are provided on the other side of the support member 14 so as to be rotatable in both directions. Each of the guide rollers 15 and 16 has a shaft in the vertical direction. One guide roller 15 is arranged so that the outer peripheral surface thereof is in line contact with one side surface of the door rail 3. Therefore, when the door 1 is opened or closed, the guide roller 15 rotates while being in contact with one side surface of the door rail 3. The other guide roller 16 is arranged so that the outer peripheral surface thereof is in line contact with the back surface of the one side surface of the door rail 3. Therefore, when the door 1 is opened or closed, the guide roller 16 rotates while being in contact with the other side surface (the back surface) of the door rail 3. That is, the guide rollers 15 and 16 hold the lower end portion of the door rail 3 therebetween from the front side and the rear side, and restrains the door 1 from being displaced to the direction in which users go into and out of the elevator car (corresponding to the axial direction of the hanger roller 6).
Other configurations are the same as those of the first embodiment.
The configuration shown in this embodiment can also achieve the same effect as that of the first embodiment. Also, in the above-described configuration, the displacement of the door 1 can be restrained properly by the displacement restraining device 13 without being affected by the arrangement and shape of the support body 5. In some cases, the positional relationship between the door rail 3 and the support body 5 deviates from the design value on account of an error occurring in manufacturing and installation. This configuration can surely prevent the guide rollers 15 and 16 from running idle on account of the above-described dimensional error, or can surely prevent the rolling resistance of the guide rollers 15 and 16 from increasing.
As shown in
The displacement restraining device 17 is provided in one side portion and the other side portion of the door hanger 2. The displacement restraining device 17 has a function of restraining the door 1 from being displaced vertically in addition to the function of restraining the door 1 from being displaced to the axial direction of the hanger roller 6. In this embodiment, the displacement restraining device 17 restrains the displacement of the door 1 by utilizing the support body 5. For this purpose, the displacement restraining device 17 is arranged at a position close to the support body 5.
The essential portion of the displacement restraining device 17 is configured by a support member 18, a stabilizing roller 19, and a pair of guide rollers 20 and 21.
The support member 18 is formed of, for example, a block material having a U shape in plain view. One side surface of the support member 18 is fixed to the side end face of the door hanger 2. Also, the essential portion of the support member 18 is arranged under the plate-shaped member 5a.
The stabilizing roller 19 has a horizontal shaft parallel with the shaft of the hanger roller 6. The stabilizing roller 19 is arranged so that the upper end of the outer peripheral face thereof is in contact with the plate-shaped member 5a of the support body 5 from the downside. Therefore, when the door 1 is opened or closed, the stabilizing roller 19 rotates while being in contact with the lower end face of the plate-shaped member 5a. That is, the stabilizing roller 19 and the hanger roller 6 hold a unit consisting of the door rail 3 and the plate-shaped member 5a therebetween from the upside and the downside to prevent the occurrence of oscillation on the door 1.
The guide rollers 20 and 21 are provided on the upper surface of the support member 18 so as to be rotatable in both directions. Each of the guide rollers 20 and 21 has a shaft in the vertical direction. One guide roller 20 is arranged so that the outer peripheral surface thereof is in line contact with one side surface of the plate-shaped member 5a. Therefore, when the door 1 is opened or closed, the guide roller 20 rotates while being in contact with one side surface of the plate-shaped member 5a. The other guide roller 21 is arranged so that the outer peripheral surface thereof is in line contact with the back surface of the one side surface of the plate-shaped member 5a. Therefore, when the door 1 is opened or closed, the guide roller 21 rotates while being in contact with the other side surface (the back surface) of the plate-shaped member 5a. That is, the guide rollers 20 and 21 hold the lower end portion of the plate-shaped member 5a therebetween from the front side and the rear side, and restrains the door 1 from being displaced to the direction in which users go into and out of the elevator car (corresponding to the axial direction of the hanger roller 6).
Other configurations are the same as those of the first embodiment.
The configuration shown in this embodiment can also achieve the same effect as that of the first embodiment. Also, if being configured as described above, the present invention can also be applied to the door operator in which the stabilizing roller 7 is not provided on the door hanger 2. Further, since the stabilizing roller 19 is configured integrally in the displacement restraining device 17, the manufacturing cost can be reduced.
In
The essential portion of the displacement restraining device 22 is configured by a support member 23, a stabilizing roller 24, and a pair of guide rollers 25 and 26.
The support member 23 is formed of, for example, a block material having a U shape in plain view. One side surface of the support member 23 is fixed to the side end face of the door hanger 2. Also, the essential portion of the support member 23 is arranged under the door rail 3.
The stabilizing roller 24 has a horizontal shaft parallel with the shaft of the hanger roller 6. The stabilizing roller 24 is arranged so that the upper end of the outer peripheral face thereof is in contact with the door rail 3 from the downside. Therefore, when the door 1 is opened or closed, the stabilizing roller 24 rotates while being in contact with the lower face of the door rail 3. That is, the stabilizing roller 24 and the hanger roller 6 hold the door rail 3 therebetween from the upside and the downside to prevent the occurrence of oscillation on the door 1.
The guide rollers 25 and 26 are provided on the upper surface of the support member 23 so as to be rotatable in both directions. Each of the guide rollers 25 and 26 has a shaft in the vertical direction. One guide roller 25 is arranged so that the outer peripheral surface thereof is in line contact with one side surface of the door rail 3. Therefore, when the door 1 is opened or closed, the guide roller 25 rotates while being in contact with one side surface of the door rail 3. The other guide roller 26 is arranged so that the outer peripheral surface thereof is in line contact with the back surface of the one side surface of the door rail 3. Therefore, when the door 1 is opened or closed, the guide roller 26 rotates while being in contact with the other side surface (the back surface) of the door rail 3. That is, the guide rollers 25 and 26 hold the lower end portion of the door rail 3 therebetween from the front side and the rear side, and restrains the door 1 from being displaced to the direction in which users go into and out of the elevator car (corresponding to the axial direction of the hanger roller 6).
Other configurations are the same as those of the first embodiment.
The configuration shown in this embodiment can achieve the effects shown in the first to third embodiments.
The door operator of an elevator according to the present invention is installed in a hall or a car of an elevator. This door operator is especially suitable for an elevator car in which the indoor pressure is controlled, an elevator hall installed in a tunnel, and the like.
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.