EP2327649A2

EP2327649A2 - Structure for preventing deviation of elevator doors and insertion of foreign objects

Info

Publication number: EP2327649A2
Application number: EP09814788A
Authority: EP
Inventors: Woo Sung Hwang
Original assignee: Mitsubishi Electric Corp; Mitsubishi Elevator Korea Co Ltd
Current assignee: Mitsubishi Electric Corp; Mitsubishi Elevator Korea Co Ltd
Priority date: 2008-09-17
Filing date: 2009-09-17
Publication date: 2011-06-01
Anticipated expiration: 2029-09-17
Also published as: CN102159487B; KR20100032027A; CN102159487A; EP2327649A4; JP2012502865A; WO2010032972A3; JP5442017B2; KR101062083B1; WO2010032972A2; EP2327649B1

Abstract

A structure for preventing deviation of elevator doors and insertion of foreign objects is provided, which can prevent opening of elevator hoistway doors by an external force and accidents caused by such opening of the elevator doors, and prevent insertion of foreign objects into a rail groove. The structure for preventing deviation of elevator doors and insertion of foreign objects includes left and right doors having sues installed on lower portions thereof, a sill having a rail groove into which the sues are inserted, and a locking bracket installed at lower ends of the left and right doors, wherein a locking groove, into which a front end of a horizontal portion of the locking bracket is inserted, is formed on an inner side wall of the rail groove, the locking bracket is a rectangular metal plate attached to the lower ends of the left and right doors with a "┘ "-shaped cross-section through bending of one portion of the lower end in one side direction, a middle bent portion obtained through double-bending in horizontal and vertical directions is further formed in a middle region of the locking bracket, and an elongated hole of a predetermined length is formed in a lower portion of the middle bent portion.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application is based on and claims priority from Korean Patent Application No. 10-2008-0090972, filed on September 17, 2008 , in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.

BACKGROUND OF THE INVENTION

Field of the invention

The present invention relates to a structure for preventing deviation of elevator doors and insertion of foreign objects, and more particularly to a structure for preventing deviation of elevator doors and insertion of foreign objects, which can prevent opening of elevator hoistway doors by an external force and accidents caused by such opening of the elevator doors, and prevent insertion of foreign objects into a rail groove.

Description of the Prior Art

In general, elevator hoistway doors are installed in places where passengers can make direct contact with the doors rather than any other place of an elevator, and are exposed to passenger's mischief and accidents.
With reference to FIG. 1, left and right doors LD and RD are installed in a hoistway portion of an elevator, and upper portions of the left and right doors LD and RD are connected to connection plates 400.
Also, on lower portions of the left and right doors LD and RD, shoes 100 are formed, and a sill 200, in which the shoes 100 are inserted and guided, is installed in the lower portions of the hoistway portion.
In accordance with the above-described structure, the left and right doors LD and RD are opened or closed by the operation of the connection plates 400 through the driving of the hoistway door device and the guide operation of the sues 100 and sill 200.
That is, the hoistway door device may have a structure in which the connection plates 400 provided in upper portions of the left and right doors LD and RD are connected together through a wire 300 or the like, and if one door (e.g. LD) is moved, the other door (e.g. RD), which receives a force transferred through the wire 300, is opened or closed, or a structure in which the respective connection plates 400 are driven to open or close the left and right doors LD and RD. However, if an impact is applied to a bottom surface of a lower end of one door (e.g. LD), regardless of the fact that the left and right doors LD and RD are opened or closed separately or in association with each other, the deviation of the door LD may easily occur.
Accordingly, as illustrated in FIG. 2, if the door does not have sufficient rigidity when an abnormal impact is applied to the door LD or RD (as indicated by an arrow in FIG. 2) due to an unavoidable accident or the like, the bending of the door occurs greatly, and thus the shoe 100, which serves to guide the lower portion of the door, may deviate from the sill 200.
Although several structures for preventing such deviation have been originated, foreign objects may be easily inserted in the sill 200 due to such deviation prevention structure, and thus trouble may frequently occur in operating the hoistway doors. Also, during the installation of the deviation prevention structure, it is difficult to perform an accurate space adjustment, and thus it is difficult to install the deviation prevention structure. Also, due to an erroneous space adjustment, an interference or trouble may occur between the respective constituent elements.

SUMMARY OF THE INVENTION

Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the related art while advantages achieved by the related art are maintained intact.
One subject to be achieved by the present invention is to provide a structure for preventing deviation of elevator doors and insertion of foreign objects, which can prevent opening of elevator hoistway doors by an external force applied to the hoistway doors and cause no difficulty in opening/closing the elevator hoistway doors even without separately reinforcing the strength of the elevator hoistway doors.
Another subject to be achieved by the present invention is to provide a structure for preventing deviation of elevator doors and insertion of foreign objects, which can prevent insertion of foreign objects in the sill, reduce the possibility of trouble due to the insertion of the doors through setting of an appropriate installation height, and improve the workability.
In one aspect of the present invention, there is provided a structure for preventing deviation of elevator doors and insertion of foreign objects, including left and right doors having sues installed on lower portions thereof and a sill having a rail groove into which the sues are inserted, which includes a locking bracket installed at lower ends of the left and right doors with a "┘"-shaped cross-section and having a vertical portion and a horizontal portion, wherein a locking groove into which a front end of the horizontal portion of the locking bracket is inserted or a projection portion is formed on an inner wall of a rail groove. The structure for preventing deviation of elevator doors and insertion of foreign objects according to an embodiment of the present invention may adopt double bending in the middle of the locking bracket, and thus can minimize interference caused by foreign objects accumulated on the sill and improve the strength of the locking bracket. Also, the structure for preventing deviation of elevator doors and insertion of foreign objects according to an embodiment of the present invention facilitates the installation and adjustment through addition of a cutout portion or hole to the center portion or outline of the locking bracket.
With the above-described construction according to the present invention, unnecessary costs for reinforcing the strength of the doors so as to prevent the deviation of the doors due to an abnormally impact or external force can be reduced, and a user or a resident can be prevented from falling into the shaft as the deviation of the doors occurs due to such an abnormal impact. Also, installation of the structure for preventing deviation of elevator hoistway doors is facilitated, and the trouble of the hoistway doors due to the foreign objects accumulated in the sill can be minimize.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a front view illustrating the structure of a general elevator;
FIG. 2 is a side view illustrating a door bent by an external force;
FIG. 3 is a front view illustrating a structure for preventing deviation of elevator doors according to an embodiment of the present invention;
FIG. 4 is a detailed side view illustrating an insertion state of FIG. 3;
FIGS. 5 to 8 are front views and side sectional views of various kinds of locking brackets of FIG. 3;
FIG. 9 is a view illustrating a method of confirming upper and lower positions of a locking bracket in the case where no adjustment hole exists;
FIG. 10 is a side view illustrating a method of setting an appropriate installation position to match a fitting member in the case where an adjustment hole is applied to the center portion of a locking bracket according to an embodiment of the present invention; and
FIG. 11 is a front view of a locking bracket in a state where a fitting member is inserted in an elongated hole formed on both end portions thereof according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 3 is a front view illustrating a structure for preventing deviation of elevator doors according to an embodiment of the present invention, and FIG. 4 is a detailed side view illustrating an insertion state of FIG. 3. FIGS. 5 to 8 are front views and side sectional views of various kinds of locking brackets of FIG. 3.
As illustrated in FIGS. 3 and 4, a structure for preventing deviation of elevator doors and insertion of foreign objects according to an embodiment of the present invention includes left and right doors LD and RD having sues 100 installed on lower portions thereof and a sill 200 having a rail groove 210 into which the sues 100 are inserted. A locking bracket 2 is installed at lower ends of the left and right doors LD and RD, and on an inner wall of the rail groove 210, a locking groove 212, into which a front end 21 of a horizontal portion of the locking bracket 2 is inserted, is formed. The sue 100 is an approximately rectangular metal plate formed in the lower portions of the left and right doors LD and RD, and a stepped portion 110 for preventing the deviation is formed at the lower end of the sue 100. The sill 200 is a guide member of a predetermined length, which has the rail groove 210 into which a lower stepped portion 110 of the sue 100 is inserted. Accordingly, when the left and right doors LD and RD are opened or closed, the sue 100 moves along the rail groove 210.
As illustrated in FIGS. 5 to 8, the locking bracket 2 is a rectangular metal plate attached to the lower ends of the left and right doors LD and RD, and is formed to have a "┘"-shaped cross-section by bending a part of the lower end thereof in one side direction, and thus a front end that is parallel to the lower portion thereof is formed. Also, the upper portions thereof are fixed to the lower ends of the left and right doors LD and RD by bolt fastening. Particularly, by double-bending a middle region of the locking bracket 2 in horizontal and vertical directions, a middle bent portion 24 is formed to improve the strength. Also, in the lower portion of the middle bent portion 24, an elongated hole 20 of a predetermined length is formed. Accordingly, the lower portion of the middle bent portion 24 is positioned in the center of the rail groove 210 to minimize the insertion of foreign objects.
Also, since the strength of the locking bracket 2 can be improved by the double-bent middle bent portion 24, the bending of the locking bracket 2 may be minimized even if impact is applied to the locking bracket 2. The locking groove 212 is formed on the inner wall of the rail groove 210 so that the horizontal front end 21 formed in the lower portion of the locking bracket 2 can be inserted into the locking groove 212.
As illustrated in FIGS. 5 and 7, the elongated hole 20 may be formed on both end portions of the locking bracket 2. Also, as illustrated in FIGS. 6 and 8, the elongated hole 20 may be formed in the center of the locking bracket 2.
On the other hand, in the embodiment of the present invention, it is exemplified that the sue 100 and the locking bracket 2 are separately installed, but the sue 100 and the locking bracket 2 may be formed integrally. That is, the locking bracket 2 that performs the function of the sue 100 may be installed.
The installation height of the locking bracket 2 must be accurately set. For example, in the case where the locking bracket 2 is deeply inserted into the rail groove 210, the front end 21 of the lower portion of the locking bracket reaches the lower end of the locking groove 212 to make the installation state inferior, while in the case where the locking bracket 2 is shallowly inserted into the rail groove 210, the front end 21 of the lower portion reaches the upper end of the locking groove 212 to make the installation state inferior.
FIG. 9 is a view illustrating a method of confirming upper and lower positions of a locking bracket in the case where no adjustment hole exists. As illustrated in FIG. 9, in the related art, the installation height of the locking bracket 2' is set by standing and measuring with a fitting member on which a graded scale is put. In this case, the installation height is set with the naked eye, and thus it is difficult to set an appropriate installation position of the locking bracket 2'. Accordingly, in the case where the installation position of the locking bracket 2' is erroneously adjusted, the front end 21' of the locking bracket 2' reaches the locking groove 212, and the performance cannot be properly shown. In this case, due to the interference with the sill 200, a noise and trouble may occur.
FIG. 10 is a side view illustrating a method of setting an appropriate installation position to match a fitting member in the case where an adjustment hole is applied to the center portion of a locking bracket according to an embodiment of the present invention, and FIG. 11 is a front view of a locking bracket in a state where a fitting member is inserted in an elongated hole formed on both end portions thereof according to an embodiment of the present invention.
As illustrated in FIGS. 10 and 11, the elongated hole 20 may be formed in the center region of the locking bracket 2 or in both end portions of the lock bracket 2. Regardless of the position of the elongated hole 20 formed, the lock bracket 2 can be set with a desired height through insertion of the fitting member 500. That is, the fitting member 500 is a flat plate material having a predetermined length and a narrow width, and the width of the fitting member 500 is set to be somewhat narrower than the width of the elongated hole 20. By inserting the front end of the fitting member 500 in a state where the fitting member 500 is put on the upper surface of the sill 200, the upper end of the elongated hole 20 of the locking bracket 2 becomes in close contact with the upper surface of the fitting member 500 to set the most appropriate height, and in this state, a bolt 22 is fastened to fixe the locking bracket 2.
On the other hand, in another embodiment of the present invention, a hole may be formed on the inner side wall of the rail groove 210 of the sill 200, a hole, a protrusion, or a folded portion may be formed on the whole cross-section of the sill 200, or a bolt and a plate material, a pin, a bar, or a rectangular bar may be attached or inserted in order to make an end portion on the inner side wall of the sill 200 or the upper or lower portion of the sill 200.
Although preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

A structure for preventing deviation of elevator doors and insertion of foreign objects, including left and right doors having sues installed on lower portions thereof and a sill having a rail groove into which the sues are inserted, comprising:
a locking bracket installed at lower ends of the left and right doors, and

a locking groove, into which a front end of a horizontal portion of the locking bracket is inserted, being formed on an inner side wall of the rail groove, and

wherein the locking bracket is a rectangular metal plate attached to the lower ends of the left and right doors with a "┘ "-shaped cross-section through bending of one portion of the lower end in one side direction, a middle bent portion obtained through double-bending in horizontal and vertical directions is further formed in a middle region of the locking bracket, and an elongated hole of a predetermined length is formed in a lower portion of the middle bent portion.
The structure for preventing deviation of elevator doors and insertion of foreign objects according to claim 1, wherein the locking bracket and the sue are integrally formed.
The structure for preventing deviation of elevator doors and insertion of foreign objects according to claim 1, wherein a hole is formed on the inner side wall of the rail groove of the sill,
a hole, a protrusion, or a folded portion is formed on the whole cross-section of the sill, or
at least one of a bolt, a plate material, a pin, a bar, or a rectangular bar is attached or inserted in order to make an end portion on the inner side wall of the sill or the upper or lower portion of the sill.
The structure for preventing deviation of elevator doors and insertion of foreign objects according to claim 1, wherein the middle bent portion of the locking bracket is positioned in the center of the rail groove to prevent interfere between the sill, the foreign objects, and the locking bracket and to improve the strength of the locking bracket during operation.
The structure for preventing deviation of elevator doors and insertion of foreign objects according to claim 1, wherein a hole or a cutout is formed on the locking bracket, and a fitting member or a rectangular plate is inserted into the hole or the cutout to facilitate position confirmation and adjustment upon assembling.