Elevator door opening / closing device and elevator

Abstract

To provide an elevator door opening / closing device capable of suppressing door shaking without being enlarged, and an elevator.SOLUTION: This elevator door opening / closing device for opening / closing an elevator door comprises: a door hanger that rotatably supports a moving roller rolling on the upper part of a door rail extending in a lateral direction; and an anti-shaking unit supported by the door hanger to touch the lower part of the door rail. The anti-shaking unit has a curved surface having a prescribed curvature in a door opening / closing direction at a part touching the lower part of the door rail. The anti-shaking unit is formed into a recessed shape in a door thickness direction with the curved surface set as a bottom, and the lower part of the door rail is disposed in this recess.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an elevator door opening and closing device and an elevator. [Background technology]

[0002] Patent Document 1 discloses a technique for preventing elevator doors from tilting in the opening and closing direction by providing a roller-type anti-vibration device at the bottom of the door rail. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-324938 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the roller-type anti-sway device in Patent Document 1, when the door tilts, the rollers have little contact area, which causes the load to concentrate and the rollers do not rotate smoothly, leaving issues with opening and closing the door. To prevent this, it is necessary to use a larger roller diameter to increase the roller contact area and spread the load concentration, which requires increasing the floor height of each floor and the clearance at the top of the elevator shaft by the amount of the larger roller diameter.

[0005] An object of the present invention is to provide an elevator door opening and closing device and an elevator that can suppress door swing without increasing the size of the device. [Means for solving the problem]

[0006] The elevator door opening and closing device of the present invention is an elevator door opening and closing device that opens and closes elevator doors, and is characterized in that it comprises a door hanger that rotatably supports a moving roller that rolls on the upper part of a horizontally extending door rail, and a vibration prevention device that is supported by the door hanger and contacts the lower part of the door rail, and the vibration prevention device has a curved surface with a predetermined curvature in the door opening and closing direction at the contact part with the lower part of the door rail.

[0007] Alternatively, the elevator of the present invention is an elevator equipped with an elevator door opening and closing device that opens and closes the elevator doors, the elevator door opening and closing device comprising a door hanger that rotatably supports a moving roller that rolls on the upper part of a horizontally extending door rail, and a vibration prevention device supported by the door hanger and in contact with the lower part of the door rail, the vibration prevention device having a curved surface with a predetermined curvature in the door opening and closing direction at the contact part with the lower part of the door rail. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide an elevator door opening and closing device and an elevator that can suppress door swing without increasing the size of the device. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a front view of an elevator according to a first embodiment. [Figure 2] 1 is a schematic diagram of a steady rest device according to a first embodiment. [Figure 3] FIG. 10 is a diagram showing a comparative example of the structure of a steady rest device. [Figure 4] 1 shows an elevator door hanger according to a first embodiment. [Figure 5] 1 is a cross-sectional view of a door opening and closing device according to a first embodiment. [Figure 6] FIG. 10 is a cross-sectional view of a door opening and closing device as a comparative example. [Figure 7] This is an example of the elevator door swing phenomenon. [Figure 8] This is an example of the elevator door swing phenomenon. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. [Example]

[0011] FIG. 1 is a front view of an elevator according to a first embodiment. The upper and lower portions are shown, with the center portion omitted. Two door panels 6 are provided. The left door panel 6 opens and closes to the left, and the right door panel 6 opens and closes to the right.

[0012] To allow the door panel 6 to move left and right (open and close the door), a slider 7 is disposed at the bottom of the door panel 6, and a door hanger 3 connected to the door panel 6 is disposed at the top of the door panel 6. A moving roller 2 attached to the door hanger 3 is movable along a door rail 4, moving the door panel 6. Here, if the left door panel 6 tilts clockwise and the right door panel 6 tilts counterclockwise, it is assumed that the two door panels 6 will tilt in an eight-shape. This is a phenomenon in which the gap between the left and right door panels 6 is larger at the bottom than at the top.

[0013] To prevent this, an anti-vibration device 1 is installed on the door hanger 3 below the door rail 4. This anti-vibration device 1 prevents the elevator door from vibrating. In other words, the left-right vibration of the door panel 6 around the moving roller 2 is suppressed by the door rail 4 coming into contact with the anti-vibration device, preventing the door panel 6 from tilting in a V-shape.

[0014] The elevator opening and closing device of this embodiment has a door rail 4 that is attached to an upper frame 5 and extends horizontally, a movable roller 2 that rolls on the upper part of the door rail 4, a door hanger 3 that rotatably supports the movable roller 2, a door panel 6 to which the door hanger 3 is fixed, and a semi-cylindrical anti-sway device 1 that is supported by the door hanger 3 and has a concave cross section and a partially curved bottom surface at the bottom of the door rail 4.

[0015] That is, it comprises a door hanger 3 that rotatably supports a moving roller 2 that rolls on the upper part of a horizontally extending door rail 4, and an anti-vibration device that is supported by the door hanger 3 and comes into contact with the lower part of the door rail 4, and the anti-vibration device 1 has a curved surface with a predetermined curvature in the door opening and closing direction at the contact part with the lower part of the door rail 4. This makes it possible to provide an elevator door opening and closing device and an elevator that can suppress door vibration without increasing the size of the device.

[0016] Here, the term "semicylindrical shape" generally refers to a shape that is arched at the center or a shape with a semi-circular cross section that drops off slightly sharply on both sides. While the semi-cylindrical shape is used in this embodiment, any curved surface will do. In this way, a curved surface with a predetermined curvature can be used. Therefore, the anti-vibration device 1 can increase the contact radius with the door rail 4 regardless of height, thereby increasing the contact area. By reducing the amount of deformation during contact, the concentration of load at the contact point can be suppressed. Furthermore, by providing a flange to the anti-vibration device and making the surface curved, such as a semi-cylindrical shape with a predetermined curvature, rather than a circle, the height of the device can be reduced.

[0017] FIG. 2 is a schematic diagram of the anti-vibration device 1 of the first embodiment. FIG. 2(a) is a top view, FIG. 2(b) is a perspective view seen from the outside, FIG. 2(c) is a side view seen from the end, and FIG. 2(d) shows the A-A cross section. The anti-vibration device 1 has flat ends in the width direction and a concave central portion. In the longitudinal direction, the central portion of the width is semi-cylindrical. In this embodiment, the upper portions of both ends in the width direction of the anti-vibration device 1 are flat, but they may also be curved, as long as they have a concave cross section. A sliding member may be used in the curved portion of the central portion of the width in the longitudinal direction (A-A cross section).

[0018] In addition, one surface of the anti-sway device 1 has a protrusion that is inserted into the long hole 8 of the door hanger 3. The lower part of the door rail 4 fits into this recess. The protrusion of this anti-sway device 1 is a protrusion with two straight sides at the connection point with the door hanger 3. As shown in Figures 2(b) and (c), this protrusion is rectangular with the short sides on an arc and the long sides straight. It is slightly inclined and configured to fit into the long hole 8 of the door hanger 3, which will be described later. By fitting the protrusion of the anti-sway device 1 into the long hole 8 of the door hanger 3, rotation of the anti-sway device 1 can be suppressed.

[0019] That is, the door hanger 3 has a long hole in the horizontal direction, and the anti-vibration device 1 has a long protrusion in the horizontal direction, and these long holes and protrusions fit together to attach the anti-vibration device 1 to the door hanger 3. Therefore, rotation of the anti-vibration device 1 can be suppressed.

[0020] Figure 3 shows a comparative example of the anti-vibration device structure. It is circular and flat in the width direction. The outermost surface of the circle comes into contact with the door rail 4. A small circular convex part on the same axis is inserted into a circular hole in the door hanger 3.

[0021] FIG. 4 shows an elevator door hanger according to the first embodiment. The door hanger 3 has movable rollers on the left and right sides at the top, and a fastening portion 10 at the bottom for attaching a door panel 6. The door hanger 3 also has holes for connecting the anti-vibration device 1. These holes, or elongated holes 8, are provided in two locations below the door hanger 3 and above the fastening portions 10. The elongated holes 8 are rectangular, with the short sides forming arcs and the long sides straight. The left elongated hole 8 is slightly inclined clockwise, and the right elongated hole 8 is slightly inclined counterclockwise.

[0022] 5 is a cross-sectional view of the door opening and closing device according to Example 1. In the drawing, the up-down direction indicates the up-down direction of the elevator, and the left-right direction in the drawing is the thickness direction of the door.

[0023] The door rail 4 is attached to the upper frame 5, and the moving roller 2 supported by the door hanger 3 rolls on the door rail 4. The lower part of the door hanger 3 is fastened to the upper part of the door panel 6, and a slider 7 is disposed on the lower part of the door panel 6.

[0024] The protrusion of the anti-vibration device 1 fits into the long hole 8 of the door hanger 3, and the anti-vibration device 1 is supported by the door hanger 3. The anti-vibration device 1 is provided below the door rail 4.

[0025] Here, the overlap between the door rail 4 and the anti-vibration device 1 is A, and the gap is B. When an external force is applied from the out-of-plane direction of the door, the anti-vibration device abuts against the side of the door rail, and the overlap with the door rail, A, and the gap, B mm, suppress the tilt of the elevator door around the contact point between the moving roller 2 and the door rail 4 up to θ° (= atan(A / B)).

[0026] As described above, the anti-sway device 1 has a concave shape with a curved base in the door thickness direction, and the lower part of the door rail 4 is positioned in this concave portion, so that the concave portion of the anti-sway device 1 and the door rail 4 partially overlap in the vertical direction, leaving a predetermined gap in the door thickness direction.By the concave portion of the anti-sway device 1 and the door rail 4 partially overlap in the vertical direction, leaving a predetermined gap in the door thickness direction, tilt of the elevator door around the point of contact between the moving roller 2 and the door rail 4 can be suppressed.

[0027] Figure 6 is a cross-sectional view of a door opening / closing device as a comparative example. This is an example in which the anti-sway device of Figure 3 is applied. The outermost circular surface contacts the door rail 4. The small circular convex portion on the same axis is inserted into the circular hole of the door hanger 3. Because the anti-sway device is circular, increasing the contact surface with the door rail 4 requires increasing the circle of the anti-sway device, which increases the height of the device. When an external force is applied from the out-of-plane direction of the door panel 6, the elevator door may tilt around the contact point between the moving roller 2 and the door rail 4. Furthermore, because the small circular convex portion on the same axis is inserted into the circular hole of the door hanger 3, there is a possibility that the anti-sway device 1 may rotate.

[0028] Figures 7 and 8 show examples of elevator door vibration. In Figure 7, the vertical center of the door panel 6 can be prevented from bending toward the side away from the landing by the vibration prevention device 1 abutting against the side of the door rail. In Figure 8, the vertical center of the door panel 6 can be prevented from bending toward the landing by the vibration prevention device 1 abutting against the side of the door rail. [Explanation of symbols]

[0029] 1...Sway-proof device, 2...moving roller, 3...door hanger, 4...door rail, 5...Top frame, 6...door panel, 7...slider, 8...long hole, 9...Convex part, 10... Fastening part

Claims

1. In an elevator door opening and closing device that opens and closes elevator doors, The door hanger rotatably supports a moving roller that rolls on the upper part of a horizontally extending door rail, and a vibration prevention device that is supported by the door hanger and comes into contact with the lower part of the door rail. An elevator door opening and closing device characterized in that the anti-sway device has a curved surface with a predetermined curvature in the door opening and closing direction at the contact portion with the lower part of the door rail.

2. The elevator door opening and closing device according to claim 1, An elevator door opening and closing device characterized in that the anti-sway device has a concave shape in the door thickness direction with the curved surface as its base, and the lower part of the door rail is placed in this concave shape.

3. The elevator door opening and closing device according to claim 1, The anti-sway device has a concave shape in the door thickness direction with the curved surface as a base, and the lower part of the door rail is disposed in this concave shape, An elevator door opening and closing device, characterized in that the recess of the anti-sway device and the door rail partially overlap in the vertical direction and have a predetermined gap in the door thickness direction.

4. The elevator door opening and closing device according to claim 1, The door hanger has a long hole in the horizontal direction, The anti-vibration device has a long convex portion in the horizontal direction, An elevator door opening and closing device, characterized in that the elongated hole and the protrusion are fitted together, and the anti-sway device is attached to the door hanger.

5. In an elevator equipped with an elevator door opening and closing device that opens and closes elevator doors, The elevator door opening and closing device is The door hanger rotatably supports a moving roller that rolls on the upper part of a horizontally extending door rail, and a vibration prevention device that is supported by the door hanger and comes into contact with the lower part of the door rail. An elevator characterized in that the anti-sway device has a curved surface with a predetermined curvature in the door opening and closing direction at the contact portion with the lower part of the door rail.

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