EP1950166A1

EP1950166A1 - Device for lighting elevator car

Info

Publication number: EP1950166A1
Application number: EP05806583A
Authority: EP
Inventors: Masaaki Yamada; Hatsuo Yamada
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2005-11-18
Filing date: 2005-11-18
Publication date: 2008-07-30
Anticipated expiration: 2025-11-18
Also published as: CN100591604C; JP4888387B2; EP1950166A4; WO2007057967A1; JPWO2007057967A1; CN101065315A; EP1950166B1

Abstract

Provided is an elevator car lighting fixture which enables maintenance work and the replacement of internal equipment to be readily carried out and can readily adapt to space-saving designs. For this purpose, the elevator car lighting fixture comprises a fixed ceiling portion which is provided in the upper part of the cab, a movable ceiling portion whose one end portion adjacent to the fixed ceiling portion can open and close vertically because part of the movable ceiling portion is rotatably supported by the upper par of the cab, an engaging portion provided in one end portion of the movable ceiling portion, and a supporting portion provided in one end portion of the fixed ceiling portion adjacent to the movable ceiling portion. In this supporting portion is provided a protrusion which passes above a gap formed between one end portion of the fixed ceiling portion and one end portion of the movable ceiling portion and protrudes from the fixed ceiling portion side to the movable ceiling portion side. And this protrusion is caused to engage with the engaging portion, whereby one end portion of the movable ceiling portion is held at a predetermined height. The protrusion is constructed so as to be movable along one end portion of the fixed ceiling portion, and the protrusion and the engaging portion are released from an engaged condition by moving this protrusion toward one side.

Description

Technical Field

The present invention relates to a car lighting fixture provided in an upper part of an elevator cab.

Background Art

In a case where the maintenance and inspection of a car lighting fixture provided in an upper part of an elevator cab is necessary or in a case where the replacement of internal equipment of this car lighting fixture is necessary, the elevator maintenance person must perform work on a stepladder carried into the cab while looking upward. The elevator maintenance person has hitherto been forced to perform work for long hours in an unnatural posture. In particular, the procedure for the work of opening a lower part of a car lighting fixture, such as the removal of a lighting panel, has become complex and it has become difficult to perform this work.
To solve such problems, there have been proposed conventional elevator car lighting fixtures, in which an end of a lighting cover is supported by being sandwiched between an attaching member and a ball urged to the side of this attaching member, whereby the mounting and demounting of the lighting cover to and from the cab is facilitated and the ease of work for the maintenance person is improved (refer to Patent Document 1, for example).
There have also been proposed elevator car lighting fixtures, in which a chain from a winch provided in an upper part of an elevator car is connected to a lighting fixture in a cab, whereby this lighting fixture can be electrically moved up and down (refer to Patent Document 2, for example).
Patent Document 1: Japanese Patent Laid-Open No. 2002-211858
Patent Document 2: Japanese Patent Laid-Open No. H7-137961

Disclosure of the Invention

Problems to be Solved by the Invention

In the elevator car lighting fixture described in Patent Document 1, the end portion of the lighting cover is supported by only the ball which is urged by a plate spring and the direction in which the lighting cover is removed and the direction of the urging force of the plate spring are orthogonal to each other. Therefore, in a case where the weight of the lighting cover increases under constraints of decorative appearance and the like, the ball cannot endure the weight, posing the problem that the ball cannot support the lighting cover.
In the elevator car lighting fixture described in Patent Document 2, it is necessary to have a large-scale device such as guide rollers which guides the ascent/descent direction of the winch and lighting fixture provided in the upper part of the car, posing the problems that compact designs are hindered and that the layout of elevator equipment within the shaft is also affected.
The present invention has been made to solve such problems as described above and the object of the invention is to provide an elevator car lighting fixture which enables maintenance work and the replacement of internal equipment to be readily carried out and can readily adapt to space-saving designs.

Means for Solving the Problems

An elevator car lighting fixture related to the present invention is an elevator car lighting fixture provided in an upper part of a cab of an elevator, which comprises a fixed ceiling portion which is provided in the upper part of the cab of the elevator and arranged below a lighting body which lights the interior of the cab, a movable ceiling portion whose one end portion adjacent to the fixed ceiling portion can open and close vertically because part of the movable ceiling portion is rotatably supported by the upper part of the cab, an engaging portion provided in one end portion of the movable ceiling portion, a supporting portion provided in one end portion of the fixed ceiling portion adjacent to the movable ceiling portion, and a protrusion which is provided in the supporting portion, passes above a gap formed between one end portion of the fixed ceiling portion and one end portion of the movable ceiling portion and protrudes from the fixed ceiling portion side to the movable ceiling portion side and part of which engages with the engaging portion, thereby to hold one end portion of the movable ceiling portion at a predetermined height. The protrusion is provided so as to be movable along one end portion of the fixed ceiling portion, and the protrusion and the engaging portion can be released from an engaged condition by moving the protrusion toward one side.

Effect of the Invention

The present invention provides an elevator car lighting fixture provided in an upper part of a cab of an elevator, which comprises a fixed ceiling portion which is provided in the upper part of the cab of the elevator and arranged below a lighting body which lights the interior of the cab, a movable ceiling portion whose one end portion adjacent to the fixed ceiling portion can open and close vertically because part of the movable ceiling portion is rotatably supported by the upper part of the cab, an engaging portion provided in one end portion of the movable ceiling portion, a supporting portion provided in one end portion of the fixed ceiling portion adjacent to the movable ceiling portion, and a protrusion which is provided in the supporting portion, passes above a gap formed between one end portion of the fixed ceiling portion and one end portion of the movable ceiling portion and protrudes from the fixed ceiling portion side to the movable ceiling portion side and part of which engages with the engaging portion, thereby to hold one end portion of the movable ceiling portion at a predetermined height. The protrusion is provided so as to be movable along one end portion of the fixed ceiling portion, and the protrusion and the engaging portion can be released from an engaged condition by moving the protrusion toward one side. Because of this construction, maintenance work and the replacement of internal equipment can be readily carried out and bedsides it is possible to readily adapt to space-saving designs of the car lighting fixture.

Brief Description of the Drawings

Figure 1 is a side view of an elevator cab in Embodiment 1 of the present invention.
Figure 2 is an A-A cross section of the cab shown in Figure 1.
Figure 3 is a view taken in the direction of the arrow B in Figure 2.
Figure 4 is a view taken in the direction of the arrow C in Figure 2.
Figure 5 is an enlarged view of part D of the elevator car lighting fixture shown in Figure 4.
Figure 6 is an E-E sectional view of the elevator car lighting fixture shown in Figure 5.
Figure 7 is an F-F sectional view of the elevator car lighting fixture shown in Figure 5.
Figure 8 is an H-H sectional view of the elevator car lighting fixture shown in Figure 5.
Figure 9 is a diagram which shows a maintenance operation of the elevator car lighting fixture in Embodiment 1 of the present invention, the figure corresponding to Figure 7.
Figure 10 is a diagram which shows a maintenance operation of the elevator car lighting fixture in Embodiment 1 of the present invention, the figure corresponding to Figure 5.
Figure 11 is a diagram which shows a maintenance operation of the elevator car lighting fixture in Embodiment 1 of the present invention, the figure corresponding to Figure 8.
Figure 12 is a partial plan view of an elevator car lighting fixture in Embodiment 2 of the present invention.
Figure 13 is an enlarged view of part K of the elevator car lighting fixture shown in Figure 12.
Figure 14 is an M-M sectional view of the elevator car lighting fixture shown in Figure 13.
Figure 15 is an N-N sectional view of the elevator car lighting fixture shown in Figure 14.
Figure 16 is an enlarged view of part L of the elevator car lighting fixture shown in Figure 12.
Figure 17 is a P-P sectional view of the elevator car lighting fixture shown in Figure 16.
Figure 18 is an S-S sectional view of the elevator car lighting fixture shown in Figure 17.
Figure 19 is a diagram which shows a maintenance operation of an elevator car lighting fixture in Embodiment 2 of the present invention, the figure corresponding to Figure 18.
Figure 20 is a diagram which shows a maintenance operation of the elevator car lighting fixture in Embodiment 2 of the present invention, the figure corresponding to Figure 12.

Description of symbols

1 lighting body, 2 lighting cover portion, 3 middle ceiling plate, 3a rising portion, 4 right ceiling plate, 5 left ceiling plate, 5a rising portion, 5b horizontal portion, 5c inclined portion, 5d opening, 5e light intercepting panel, 6 hinge, 7 lighting panel, 8 engaging plate, 8a notch, 9 reinforcing material, 10 holding jig, 11 supporting metal fitting, 11a bottom portion, 11b rising portion, 11c protrusion, 11d oval hole, 11e screw hole, 12 fixing metal fitting, 12a through hole, 13 pin, 14 spring,15 bolt, 16 washer, 17 nut, 18 lock nut, 19 nut, 20 steel tape, 21 engaging plate, 21a notch, 22 holding jig, 23 supporting metal fitting, 23a bottom portion, 23b rising portion, 23c rising portion, 23d protrusion, 23e through hole, 23f through hole, 24 first fixing metal fitting, 24a through hole, 25 second fixing metal fitting, 25a screw hole, 26 pin, 27 spring, 28 nut

Best Mode for Carrying Out the Invention

The present invention will be described with reference to the accompanying drawings in order to explain the invention in more detail. Incidentally, in each of the drawings, same numerals refer to same or corresponding parts and overlaps of descriptions of these parts are appropriately simplified or omitted.

Embodiment 1

Figure 1 is a side view of an elevator cab in Embodiment 1 of the present invention, Figure 2 is an A-A cross section of the cab shown in Figure 1, and Figure 3 is a view taken in the direction of the arrow B in Figure 2. In Figures 1 to 3, the reference numeral 1 denotes two lighting bodies, which are constituted by fluorescent lamps and the like which are provided in an upper part of the cab and light the interior of the cab, and the reference numeral 2 denotes a lighting cover portion which is provided in the upper part of the cab so as to cover the lighting body 1 and whose bottom surface which extends all over the upper part of the cab forms a cab ceiling surface.
The lighting cover portion 2 is constituted by a middle ceiling plate 3 arranged so as to extend to the front and rear of a middle part as viewed from the car entrance side of the cab, and a right ceiling plate 4 and a left ceiling plate 5, which are arranged so as to extend to the front and rear of this middle ceiling plate 3 on both sides thereof. The middle ceiling plate 3, which is fabricated from a decorative painted steel or aluminum panel and the like, is fixed to the upper part of the cab by being suspended therefrom, and arranged below the lighting body 1. And in the right and left two end portions of the middle ceiling plate 3, there are formed rising portions 3a so as to extend to the front and rear of the cab by bending an edge portion thereof upward for a predetermined distance. Incidentally, the fixed ceiling portion in Embodiment 1 is the above-described middle ceiling plate 3 provided in the upper part of the cab.
As with the middle ceiling plate 3, the above-described left ceiling plate 5 is fabricated from a decorative painted steel or aluminum panel and the like, the front side and rear side of the left end portion adjacent to the left side wall of the cab are rotatably supported by a hinge 6 having a rotary shaft in the front-and-rear direction of the cab in relation to the upper part of the cab. That is, the right end portion of this left ceiling plate 5 adjacent to the middle ceiling plate 3 moves vertically, with the hinge 6 serving as the center, and constitutes part of the lighting cover portion 2 so as to be able to open and close this part. In the right edge portion of the left ceiling plate 5, there is provided a rising portion 5a so as to extend to the front and rear of the cab by bending an edge portion thereof upward for a predetermined distance. Incidentally, between this rising portion 5a of the left ceiling plate 5 and one rising portion 3a of the middle ceiling plate 3, there is formed a gap having a predetermined width G (for example, 2 mm).
The portion of the left ceiling plate 5 which forms the cab ceiling surface is constituted by a horizontal portion 5b on the middle ceiling plate 3 side and an inclined portion 5c which inclines downward from this horizontal portion 5b to the left side wall of the cab. And in the inclined portion 5c, there is formed an opening 5d which has a roughly square shape all over the inclined portion 5c, and a lighting panel 7 having predetermined light transmission properties (for example, a translucent acrylic plate) is fixed by being placed from above the inclined portion 5c so as to cover this opening 5d.
The reference numeral 5e denotes a light intercepting panel (a light intercepting portion) which is provided in a standing manner in the horizontal portion 5b of the left ceiling plate 5. This light intercepting panel 5e serves to prevent light emitted from one lighting body 1 arranged above the horizontal portion 5b from leaking through the gap formed between the left end portion of the middle ceiling plate 3 and the right end portion of the left ceiling plate 5, and the light intercepting panel 5e is arranged between this lighting body 1 and the right end portion of the left ceiling plate 5 so as to cover the middle ceiling plate 3 side of one lighting body 1. A paint having a high reflectance or the like is applied to the surface of the light intercepting panel 5e opposed to the lighting body 1, and the intercepting panel 5e reflects light emitted from the lighting body 1 to the middle ceiling plate 3 side on the counter-middle-ceiling-plate 3 side. Because of this construction, without leaking through the gap formed between the left end portion of the middle ceiling plate 3 and the right end portion of the left ceiling plate 5, the light from the lighting body 1 is diffused above the left ceiling plate 5, passes through the lighting panel 7, and is radiated into the cab.
On the other hand, also the right ceiling plate 4 has the same construction as the above-described left ceiling plate 5, and the light from the other lighting body 1 is diffused above the right ceiling plate 4, passes through the lighting plate 7, and is radiated into the cab. Incidentally, the movable ceiling portion in Embodiment 1 is constituted by the above-described left ceiling plate 5 and the above-described right ceiling plate 4.
Next, a detailed description will be given of the inner construction of the car lighting fixture provided in the upper part of the elevator cab. Figure 4 is a view taken in the direction of the arrow C in Figure 2, and shows part of the car lighting fixture provided in the upper part of the cab in a condition as viewed from above. Figure 5 is an enlarged view of part D of the elevator car lighting fixture shown in Figure 4, Figure 6 is an E-E sectional view of the elevator car lighting fixture shown in Figure 5, Figure 7 is an F-F sectional view of this elevator car lighting fixture, and Figure 8 is an H-H sectional view of this elevator car lighting fixture.
In Figures 4 to 8, upon the top surface of the right edge portion of the left ceiling plate 5, an engaging plate 8 (an engaging portion) having a roughly Z-shaped longitudinal section is fixed by bonding or welding and the like so as to extend to the front and rear of the cab. This engaging plate 8 is arranged in such a manner that an end portion (hereinafter called a "top end portion") of the middle ceiling plate 3 side is opposed to the right end portion of the left ceiling plate 5 with a predetermined gap. That is, the top end portion of the engaging plate 8 formed from a plate-like member is arranged parallel to this right end portion above the right end portion of the left ceiling plate 5. And in the top end portion of the engaging plate 8, there are formed multiple concave notches 8a (three notches in Figure 4) which open to the middle ceiling plate 3 side at predetermined intervals.
On the other hand, upon the top surface of the left end portion of the middle ceiling plate 3 adjacent to the left ceiling plate 5, a reinforcing material 9 is fixed by welding and the like so as to extend to the front and rear of the cab. This reinforcing material 9, which is formed by bending a sheet, is arranged in such a manner that the top surface thereof has a predetermined height from the top surface of the left end portion of the middle ceiling plate 3. And upon the top surface of the reinforcing material 9, there are provided multiple holding jigs 10 in positions corresponding to each of the notches 8a formed in the top end portion of the engaging plate 8.
Next, the construction of the above-described holding jig 10 will be described.
The holding jig 10 is constituted by a supporting metal fitting 11 (a supporting portion), a fixing metal fitting 12, a pin 13 and a spring 14. In the supporting metal fitting 11, a rising portion 11b is formed each before and behind a bottom portion 11a placed on the top surface of the reinforcing material 9 by bending a front edge portion and a rear edge portion upward. The reference numeral 11c denotes a protrusion which is provided in a protruding manner from the bottom portion 11a to the left ceiling plate 5 side. This protrusion 11c, which is formed from a plate-like member arranged parallel to one end portion of the middle ceiling plate 3, is arranged so as to pass above a gap formed between the adjacent end portions of the middle ceiling plate 3 and of the left ceiling plate 5 and protrude from the middle ceiling plate 3 side to the left ceiling plate 5 side. And in such a manner that the top end portion of the engaging plate 8 is placed on the leading end portion of the protrusion 11c, the protrusion 11c engages with the engaging plate 8 from below and holds the right end portion of the left ceiling plate 5 at a predetermined height, whereby the bottom surface of the left ceiling plate 5 and the bottom surface of the middle ceiling plate 3 are formed as a continuous cab ceiling surface.
In the above-described supporting metal fitting 11, two oval holes 11d having a longitudinal direction in the front-and-rear direction of the cab are formed in the bottom portion 11a. And a bolt 15 fixed by welding to the reinforcing material 9 in such a manner that a threaded portion at the leading end protrudes from the top surface of the reinforcing member 9 is loosely penetrated into each of the oval holes 11d. Incidentally the reference numeral 16 denotes a washer which is loosely penetrated into each of the bolts 15 and placed on the top surface of the bottom portion 11a of the supporting metal fitting 11, the reference numeral 17 denotes a nut whose bottom surface is screwed into the bolt 15 with a slight gap G1 from the top surface of the washer 16, and the reference numeral 18 denotes a lock nut which is screwed into the bolt 15 from above the nut 17 and double nut fastened along with the nut 17. Because of this construction, the supporting metal fitting 11 is constructed so as to be movable for a predetermined distance along the longitudinal direction of the oval hole 11d, i.e., along the right end portion of the middle ceiling plate 3 and rattling during the movement is also minimized.
The above-described fixing metal fitting 12 which is bent with a roughly L-shaped section is arranged in such a manner that the top end portion protruding from the top surface of the reinforcing member 9 is opposed to one rising portion 11b of the supporting metal fitting 11 (the rear rising portion 11b in Embodiment 1) with a predetermined spacing, and the bottom end portion of the fixing metal fitting 12 is fixed by welding and the like to the top surface of the reinforcing material 9. Incidentally, a screw hole 11e formed in one rising portion 11b of the supporting metal fitting 11 and a through hole 12a formed in the top end portion of the fixing metal fitting 12 are provided so as to be substantially in line with each other.
The above-described pin 13 is inserted into the through hole 12a, which is formed in the fixing metal fitting 12, from the counter-supporting-metal-fitting 11 side, and a threaded portion provided in the leading end portion of the pin 13 is screwed into the screw hole 11e formed in the rising portion 11b of the supporting plate 11. A nut 19 is further screwed into the leading end portion of the pin 13 to prevent the pin 13 from coming off. On the other hand, the above-described spring 14, into the hollow portion of which the pin 13 is inserted, is arranged between the top end portion of the fixing metal fitting 12 and one rising portion 11b of the supporting metal fitting 11. That is, the supporting metal fitting 11 is constantly urged by the spring 14 to the counter-fixing-metal-fitting 12 side.
Figures 4 to 8 show a condition in which the supporting metal fitting 11 moves to the extreme counter-fixing-metal-fitting 12 side, i.e., to the front side of the cab upon urging of the supporting metal fitting 11 by the spring 14 and the distance between the top end portion of the fixing metal fitting 12 and one rising portion 11b of the supporting metal fitting 11 becomes distance J. In this condition, the bolt 15 is arranged on the rear side of the oval hole 11d due to the movement of the supporting metal fitting 11 to the front side of the cab. The leading end portion of the protrusion 11c of the supporting metal fitting 11 is present on the front side of the notch 8a formed in the engaging plate 8 a predetermined distance spaced therefrom. Therefore, because the leading end portion of the protrusion 11c of the supporting metal fitting 11 is arranged below the top end portion of the engaging plate 8 and supports this top end portion, the right end portion of the left ceiling plate 5 is held at a predetermined height.
Incidentally, the left end portion of the right ceiling plate 4 and the right end portion of the middle ceiling plate 3 adjacent to this right ceiling plate 4 also have the same construction as described above. And the left end portion of the right ceiling plate 4 is held at a predetermined height by the multiple holding jigs 10.
Next, a description will be given of an operation which occurs when the right ceiling plate 4 and the left ceiling plate 5 are opened from inside the cab by the elevator maintenance person in order to carry out the maintenance and inspection of the car lighting fixture provided in the upper part of the cab, the replacement of the lighting body 1 and the like. Figure 9 is a diagram which shows a maintenance operation of the elevator car lighting fixture in Embodiment 1 of the present invention, the figure corresponding to Figure 7. Figure 10 corresponds to Figure 5 and Figure 11 corresponds to Figure 8.
In Figures 9 to 11, the elevator maintenance person steps on a stepladder carried into the cab and inserts, for example, a steel tape 20 from below into a gap having width G formed between adjacent end portions of the middle ceiling plate 3 and of the left ceiling plate 5 from below the car lighting fixture. Incidentally, this steel tape 20 is formed from a plate-like member having a thickness smaller than width G and a predetermined length. And by use of the top end portion of the steel tape 20, the protrusion 11c of the supporting metal fitting 11 is caused to move to one side (the rear side of the cage in Embodiment 1) against the urging force of the spring 14. When the protrusion 11c of the supporting metal fitting 11 is caused to move to the position of the notch 8a of the engaging plate 8 by use of the steel tape 20, the protrusion 11c of the supporting metal fitting 11 and the top end portion of the engaging plate 8 are released from an engaged condition and the right end portion of the left ceiling plate 5 becomes rotatable downward. Incidentally, Figure 10 shows the disengaged condition of the protrusion 11c of the supporting metal fitting 11 and the top end portion of the engaging plate 8. After that, the elevator maintenance person moves the right end portion of the left ceiling plate 5 downward and carries out the replacement of the lighting fixture 1, maintenance work and the like.
After the replacement of the lighting fixture 1, the maintenance person can close the left ceiling plate 5 by reversing the above-described procedure. That is, the maintenance person first moves the right end portion of the left ceiling plate 5 upward, with the hinge 6 serving as the center. And the maintenance person aligns the bottom surface of the left ceiling plate 5 and the bottom surface of the middle ceiling plate 3 to be flush with each other and inserts the steel plate 20 into the gap formed between the left ceiling plate 5 and the middle ceiling plate 3, thereby causing this steel tape 20 to move the protrusion 11c of the supporting metal fitting 11 to the notch 8a of the engaging plate 8. And the protrusion 11c of the supporting metal fitting 11 to be arranged below the top end portion of the engaging plate 8.
Incidentally, it is possible to open and close the right ceiling plate 4 by the same procedure and operation as described above.
According to Embodiment 1 of the present invention, the elevator maintenance person can carry out the opening and closing of the left ceiling plate 5 and the right ceiling plate 4 only by a simple operation using the steel tape 20 from inside the cab and readily perform the maintenance and inspection of the car lighting fixture, the replacement of internal equipment and the like. The car lighting fixture has an excellent decorative appearance because the width of the gaps formed on both sides of the middle ceiling plate 3 is small. Even when the weight of the right ceiling plate 4 and the left ceiling plate 5 increases, it is possible to positively hold the right ceiling plate 4 and the left ceiling plate 5 by use of the supporting metal fitting 11 and the engaging plate 8.
The protrusion 11c of the supporting metal fitting 11 which supports the right end portion of the left ceiling plate 5 and the left end portion of the right ceiling plate 4 as well as the top end portion of the engaging plate 8 which engages with this protrusion 11c are formed from plate-like members which are substantially horizontally arranged, and the protrusion 11c and the top end portion of the engaging plate 8 can be released from an engaged condition by horizontally moving the protrusion 11c. Therefore, by reducing the vertical thickness of the car lighting fixture, it is possible to readily adapt to space-saving designs. Therefore, the layout of various pieces of equipment within the shaft is not affected.
Incidentally, as in Embodiment 1, by providing the right ceiling plate 4 and left ceiling plate 5 each formed from a movable ceiling portion on both sides of the middle ceiling plate 3 and arranging the lighting body 1 nearer to the middle ceiling plate 3, it is also possible to carry out the opening and closing operation of the right ceiling plate 4 and the left ceiling plate 5 and the replacement work of the lighting body 1 in one place, thereby making it possible to further improve the ease of work.

Embodiment 2

Figure 12 is a partial plan view of an elevator car lighting fixture in Embodiment 2 of the present invention, Figure 13 is an enlarged view of part K of the elevator car lighting fixture shown in Figure 12, Figure 14 is an M-M sectional view of the elevator car lighting fixture shown in Figure 13, Figure 15 is an N-N sectional view of the elevator car lighting fixture shown in Figure 14, Figure 16 is an enlarged view of part L of the elevator car lighting fixture shown in Figure 12, Figure 17 is a P-P sectional view of the elevator car lighting fixture shown in Figure 16, and Figure 18 is an S-S sectional view of the elevator car lighting fixture shown in Figure 17.
In Figures 12 to 18, an engaging plate 21 (an engaging portion) has the same construction as the engaging plate 8 in Embodiment 1, and above the right end portion of the left ceiling plate 5, a top end portion of the engaging plate 21 formed from a plate-like member is arranged parallel to this right end portion. And in a top end portion of the engaging plate 21, there are formed multiple concave notches 21a having width Q (five notches in Figure 12) which open to the middle ceiling plate 3 side at predetermined intervals. Upon the top surface of the left end portion of the middle ceiling plate 3 adjacent to the left ceiling plate 5, the same reinforcing material 9 as in Embodiment 1 is fixed by welding and the like. And upon the top surface of the reinforcing material 9, there is provided one holding jig 22.
The holding jig 22 is constituted by a supporting metal fitting 23 (a supporting portion), a first fixing metal fitting 24, a second fixing metal fitting 25, a pin 26 and a spring 27. The supporting metal fitting 23 is provided so as to reach the left end portion of the middle ceiling plate 3, and a rising portion 23b is formed each before and behind a bottom portion 23a placed on the top surface of the reinforcing material 9 by bending a front edge portion and a rear edge portion upward. Incidentally, as with the reinforcing material 9, the supporting metal fitting 23 has a longitudinal direction in the front-and-rear direction of the cab and is provided so as to be shorter by a predetermined distance than the reinforcing material 9 which is provided so as to extend to the front and rear of the middle ceiling plate 3. The reference numeral 23c denotes a rising portion whose right edge portion of the bottom portion 23a is bent upward for reinforcement, and the reference numeral 23d denotes multiple protrusions having width R (< Q) (five protrusions in Figure 12) which are provided in a protruding manner from the bottom portion 23a to the left ceiling plate 5 side. Each of the protrusions 23d is formed from a plate-like member arranged parallel to one end portion of the middle ceiling plate 3, and arranged so as to pass above the gap formed between adjacent end portions of the middle ceiling plate 3 and of the left ceiling plate 5 and protrude from the middle ceiling plate 3 side to the left ceiling plate 5 side. And in such a manner that the top end portion of the engaging plate 21 is placed on the leading end portion of the protrusion 23d, the protrusion 23d engages with the engaging plate 21 from below and holds the right end portion of the left ceiling plate 5 at a predetermined height, whereby the bottom surface of the left ceiling plate 5 and the bottom surface of the middle ceiling plate 3 are formed as a continuous cab ceiling surface.
The above-described first fixing metal fitting 24 and second fixing metal fitting 25 which are bent with a roughly L-shaped section are arranged in such a manner that the top end portions protruding from the top surface of the reinforcing member 9 are opposed to each other, with the supporting metal fitting 23 interposed, and the bottom end portions of the fixing metal fittings are fixed by welding and the like to the top surface of the reinforcing material 9. Incidentally, a through hole 24a formed in the top end portion of the first fixing metal fitting 24 arranged on the front side of the supporting metal fitting 23, a through hole 23e formed in the rising portion 23b of the supporting metal fitting 23 opposed to the top end portion of the first fixing metal fitting 24, a screw hole 25a formed in the top end portion of the second fixing metal fitting 25 arranged on the rear side of the supporting metal fitting 23, and a through hole 23f formed in the rising portion 23b of the supporting metal fitting 23 opposed to the top end portion of the second fixing metal fitting 25 are provided so as to be substantially in line with each other.
The above-described pin 26 is inserted into the through hole 24a, which is formed in the first fixing metal fitting 24, from the counter-supporting-metal-fitting 23 side, and passes through the through holes 23e and 23f formed in each of the rising portions 23b of the supporting metal fitting 23, and a threaded portion provided in the leading end portion of the pin 26 is screwed into the screw hole 25a formed in the second fixing metal fitting 25. A nut 28 is further screwed into the leading end portion of the pin 26 to prevent the pin 26 from coming off. On the other hand, the above-described spring 27, into the hollow portion of which the pin 26 is inserted, is arranged between the top end portion of the second fixing metal fitting 25 and the rising portion 23b on the rear side of the supporting metal fitting 23. That is, the supporting metal fitting 23 is constantly urged by the spring 27 to the counter-first-fixing-metal-fitting 24 side.
Figures 12 to 18 show a condition in which the supporting metal fitting 23 moves to the extreme counter-second-fixing-metal-fitting 25 side, i.e., to the front side of the cab upon urging of the supporting metal fitting 23 by the spring 27 and the distance between the top end portion of the second fixing metal fitting 25 and the rising portion 23b on the rear side of the supporting metal fitting 23 becomes distance T. In this condition, the top end portion of the first fixing metal fitting 24 and the rising portion 23b on the front side of the supporting metal fitting 23 come into contact with each other due to the movement of the supporting metal fitting 23 to the front side of the cab along the axial direction of the pin 26. The leading end portion of each of the protrusions 23d of the supporting metal fitting 23 is present on the front side of the each of the notches 21a formed in the engaging plate 21 a predetermined distance spaced therefrom. Therefore, because the leading end portion of each of the protrusions 23d of the supporting metal fitting 23 is arranged below the top end portion of the engaging plate 21 and supports this top end portion, the right end portion of the left ceiling plate 5 is held at a predetermined height.
Incidentally, the left end portion of the right ceiling plate 4 and the right end portion of the middle ceiling plate 3 adjacent to this right ceiling plate 4 also have the same construction as described above. And the left end portion of the right ceiling plate 4 is held at a predetermined height by each of the protrusions 23d of the supporting metal fitting 23.
Next, a description will be given of an operation which occurs when the right ceiling plate 4 and the left ceiling plate 5 are opened from inside the cab by the elevator maintenance person in order to carry out the maintenance and inspection of the car lighting fixture provided in the upper part of the cab, the replacement of the lighting body 1 and the like. Figure 19 is a diagram which shows a maintenance operation of the elevator car lighting fixture in Embodiment 2 of the present invention, the figure corresponding to Figure 18. Figure 20 corresponds to Figure 12.
In Figures 19 to 20, the elevator maintenance person steps on a stepladder carried into the cab and inserts, for example, a steel tape 20 from below into a gap having width G formed between adjacent end portions of the middle ceiling plate 3 and of the left ceiling plate 5 from below the car lighting fixture. And by use of the top end portion of the steel tape 20, one of the protrusions 23d of the supporting metal fitting 23 is caused to move to one side against the urging force of the spring 27. Each of the protrusions 23d is provided in the supporting metal fitting 23. By causing one of the protrusions 23d to move to one side, it is ensured that the other protrusions 23d also move in synchronization in the same direction. When the protrusions 23d of the supporting metal fitting 23 are caused to move to the positions of the notches 21a of the engaging plate 21 by use of the steel tape 20, each of the protrusions 23d of the supporting metal fitting 23 and the top end portion of the engaging plate 21 are simultaneously released from an engaged condition and the right end portion of the left ceiling plate 5 becomes rotatable downward. After that, the elevator maintenance person moves the right end portion of the left ceiling plate 5 downward and carries out the replacement of the lighting body 1, maintenance work and the like.
According to Embodiment 2 of the present invention, by causing one of the protrusions 23d of the supporting metal fitting 23 to move to the rear side of the cab by use of the steel tape 20, it is ensured that the whole supporting metal fitting 23 moves, making it possible to release all of the protrusions 23d from an engaged condition. Therefore, it is possible further improve the ease of the work carried out by the maintenance person within the cab and to reduce the burden on the maintenance person. Incidentally, Embodiment 2 has the same construction and effect as Embodiment 1 in other respects.

Industrial Applicability

As described above, in the elevator car lighting fixture related to the present invention, the lower part of the car lighting fixture can be readily opened by use of a steel tape from within the cab and the maintenance work of the car lighting fixture and the replacement of internal equipment and the like can be readily carried out. By forming the protrusion of the supporting metal fitting and the top end portion of the engaging plate from plate-like members which are horizontally arranged, the protrusion of the supporting portion and the top end portion of the engaging plate can be released from an engaged condition by horizontally moving the protrusion. Therefore, it is possible to readily adapt to space-saving designs of the car lighting fixture.

Claims

An elevator car lighting fixture provided in an upper part of a cab of an elevator, characterized in that the elevator car lighting fixture comprises:
a fixed ceiling portion which is provided in the upper part of the cab of the elevator and arranged below a lighting body which lights the interior of the cab;

a movable ceiling portion whose one end portion adjacent to the fixed ceiling portion can open and close vertically because part of the movable ceiling portion is rotatably supported by the upper part of the cab;

an engaging portion provided in one end portion of the movable ceiling portion;

a supporting portion provided in one end portion of the fixed ceiling portion adjacent to the movable ceiling portion; and

a protrusion which is provided in the supporting portion, passes above a gap formed between one end portion of the fixed ceiling portion and one end portion of the movable ceiling portion and protrudes from the fixed ceiling portion side to the movable ceiling portion side and part of which engages with the engaging portion, thereby to hold one end portion of the movable ceiling portion at a predetermined height; and in that the protrusion is provided so as to be movable along one end portion of the fixed ceiling portion and the protrusion and the engaging portion can be released from an engaged condition by moving the protrusion toward one side.
The elevator car lighting fixture according to claim 1, characterized in that the protrusion and the engaging portion can be released from an engaged condition by moving the protrusion toward one side by use of a plate-like member which is inserted form below into the gap formed between one end portion of the fixed ceiling portion and one end portion of the movable ceiling portion.
The elevator car lighting fixture according to claim 1 or 2, characterized in that the lighting body is disposed above the movable ceiling portion and in that between the lighting body and the end portion of the movable ceiling portion, there is provided a light intercepting portion which prevents light of the lighting body from the gap formed between one end portion of the fixed ceiling portion and one end portion of the movable ceiling portion from leaking.
The elevator car lighting fixture according to any of claims 1 to 3, characterized in that the protrusion is provided in multiple numbers in one supporting portion provided so as to extend to one end portion of the fixed ceiling portion.
The elevator car lighting fixture according to any of claims 1 to 4, characterized in that the protrusion is constituted by a plate-like member arranged in one end portion of the fixed ceiling portion parallel thereto and part of the engaging portion which engages with the protrusion is constituted by a plate-like member arranged parallel thereto in one end portion of the movable ceiling portion, and in that one end portion of the movable ceiling portion is held at a predetermined height because the engaging portion is placed on the protrusion.
The elevator car lighting fixture according to any of claims 1 to 5, characterized in that the movable ceiling portion is provided on each of both sides of the fixed ceiling portion.