JPH09263372A - Car ceiling elevatable device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly inspect at operating a maintenance work for an elvator, while sufficiently insuring the overhead dimension for an operator. SOLUTION: By operating a winding handle 5 provided on a winding drum 1, the winding drum 1 is rotated, and a car ceiling 2 suspended by a rope 6 is brought down up to the position 2a. Hereby, an operator can sufficiently insure the dimension to the top part 15 of an elevator passage, and can operate a maintenance work without caring about the top part 15 of the elevator passage. Further, in this case, a cage 4 functions as a safety fence for preventing falling, and hence the maintenace work can be more efficiently executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car ceiling lifting device, and more particularly to a device used during elevator maintenance work.

[0002]

2. Description of the Related Art In a winding cylinder type or hydraulic type elevator, in general, when the elevator car goes to the top floor, the clearance at the top is often close to the legal limit, so that the workers on the car during the maintenance work. Even if you get in, there may be insufficient dimensional margin at the top. Therefore, for example, Japanese Patent Publication No.
The elevator safety device disclosed in Japanese Patent No. 6 discloses that the car is stopped at a position where a sufficient overhead dimension of the worker can be secured during maintenance.

FIG. 16 shows this conventional technique. In the figure, 2 is a car ceiling, 4 is a car room, 15 is the top of a hoistway, 20 is a limit switch, and 26 is a cam. In such a configuration, when the car comes within a predetermined distance from the top of the hoistway, the limit switch 20 is operated by the cam 26, and the car is stopped at a position where the overhead dimension of the worker can be secured.

[0004]

However, this prior art has a problem that the inspection range during maintenance is restricted because the car does not rise to the position where the car rises during automatic operation.

Further, in the elevators for observation that have been frequently seen in recent years, as shown in FIG. 18, a safety handrail 21 on a car is provided.
There is also a problem in that the maintenance work of such a prospective elevator is extremely difficult because (indicated by a broken line in the figure) may not be installed due to the design.

The present invention has been made in view of the above problems of the prior art, and an object thereof is an apparatus capable of smoothly performing an inspection while maintaining a sufficient overhead dimension of an operator during maintenance work. To provide.

[0007]

In order to achieve the above object, the first aspect of the present invention is to provide a rotatable take-up drum mounted on an upper portion of an elevator car, one end of which is wound around the take-up drum and the other end of which is provided. Has a rope attached to the elevator car ceiling to suspend the elevator car ceiling, and the elevator car ceiling is moved up and down by rotating the winding drum.

In order to achieve the above object, in the second invention, in the first invention, the winding drum is composed of a ratchet gear, and can be stopped at a desired position by meshing with a ratchet. Characterize.

In order to achieve the above object, a third aspect of the present invention is the first aspect of the present invention, further comprising a ladder having one end supported on an upper part of the car and the other end having a pulley, wherein the ladder is a car. It is characterized in that an end portion having a pulley moves on the car ceiling with one end supported on the upper part of the car as a fulcrum as the ceiling moves up and down.

In order to achieve the above object, a fourth aspect of the present invention is such that a rotatable take-up drum attached to an upper portion of an elevator car, one end attached to an upper portion of the elevator car, and the other end attached to an elevator car ceiling. And a rope having one end wound on a winding drum and the other end attached to the crank lever, the crank lever having a bent portion at substantially the center, and the rope,
One end of the crank lever is attached to the bent portion of the crank lever, and the winding drum is rotated in one direction to bend the crank lever to raise the elevator car ceiling, and the winding drum is rotated in the other direction to move the crank lever. It is characterized by direct extension and lowering of the elevator car ceiling.

Further, in order to achieve the above object, the fifth invention is characterized in that, in the first or fourth invention, it further comprises speed adjusting means for adjusting the speed when the elevator car ceiling descends.

In order to achieve the above object, a sixth aspect of the present invention is the same as in the first or fourth aspect, further, an electromagnetic coil attached to the upper part of the elevator car and a rotatable lever for holding the elevator car ceiling. And a plunger that moves according to the excitation state of the electromagnetic coil and permits or restricts the rotation of the lever depending on the moving position, the plunger restricts the rotation of the lever when the elevator car ceiling is located at the uppermost position. The elevator car ceiling is held by a lever, and when the elevator car ceiling descends, the elevator car ceiling is moved by the excitation state of the electromagnetic coil to permit the rotation of the lever.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 shows a structure when the elevator car ceiling is lowered by using the elevator car ceiling elevating device according to the present embodiment, and FIG. 2 shows the structure of FIG. The configuration of the elevator car ceiling lift is shown. In both figures, 1 is a winding drum, 2 is a car ceiling, 3 is a pulley, 4 is a cab, 5 is a winding handle attached to the winding drum, 6 is one end wound on the winding drum 1, and others. A rope 15 is attached to the car ceiling 2 to suspend the car ceiling 2, and 15 is the top of the hoistway. Further, 2a in FIG. 1 is a car ceiling in the lowered position.

FIG. 3 shows the structure of the take-up drum 1 as viewed from the direction A in FIG. Two winding drums 1 are provided, and ropes wound around the winding drums 1 are attached to the elevator car ceiling 2 at four positions via pulleys 3.

In the structure as described above, the winding drum 1
By operating the take-up handle 5 provided at, the take-up drum 1 rotates and the car ceiling 2 suspended by the rope 6 descends to the position 2a in FIG. As a result, the worker can sufficiently secure the dimensions up to the hoistway top portion 15, and can perform maintenance work without worrying about the hoistway top portion 15. Further, at this time, since the car room 4 also functions as a safety fence for preventing the fall, it becomes possible to perform the maintenance work more efficiently.

<Second Embodiment> In the first embodiment described above, the take-up drum 1 is a ratchet gear and is configured to be engaged with the ratchet, so that the rotation of the take-up drum 1 is stopped at an arbitrary position. Alternatively, the car ceiling 2 can be stationary.

FIG. 3 shows the structure of the winding drum 1 in such a case. Winding drum 1 is a ratchet gear
4 is formed, and the rope 6 is wound around the winding drum 1. A ratchet 16 is provided near the ratchet gear 14, and the ratchet 16 meshes with the ratchet gear 14 to stop the rotation of the winding drum 1. Therefore, the operator can stop the car ceiling 2 at an arbitrary position only by operating the ratchet 16, and the efficiency of the maintenance work can be further improved.

In the first and second embodiments described above, the entire length of the rope 6 is fixed, but it is also conceivable that the car ceiling 2 may be inclined due to the elongation of the rope 6 with time. It is also possible to provide an adjusting device 7 for adjusting the length of the rope 6 as shown. That is, the winding drum 1
Although the car ceiling 2 is lowered to a desired position by rotating, the operator may operate the adjusting device 7 to adjust the length of the rope 6 when the car ceiling 2 is inclined.
As the adjustment device 7, for example, a turnbuckle or the like can be used.

<Third Embodiment> FIGS. 6 and 7 show the construction of an elevator car ceiling elevating apparatus according to this embodiment. 6 shows the case where the car ceiling 2 descends, and FIG. 7 shows the case where the car ceiling rises. In both figures, 18 is a ladder, 17 is a support part at one end of which is supported on the upper part of the car, and 19 is a ladder pulley attached to the other end of the ladder, which can move freely on the upper part of the car ceiling 2. .

With such a structure, when the car ceiling 2 is lowered as shown in FIG. 6, the operator can easily use the ladder 18 to get in and out of the car. Needless to say, when using the ladder 18, it is necessary to operate the rotation stopper so that the ladder pulley 19 does not rotate.

When the car ceiling rises, the ladder pulley 19 moves on the car ceiling 2 as shown in FIG. 7, so that the ladder 18 rotates around the supporting portion 17 to raise the car ceiling 2. It is accommodated without interruption.

The supporting portion 17 which is one end of the ladder may be fixed, or may be a detachable hook structure 22 as shown in FIG. By using such a hook structure 22, it is possible to remove the ladder 18 at the time of work on the car, and to prevent the maintenance work from being hindered.

<Fourth Embodiment> FIGS. 8 and 9 show the structure of an elevator car ceiling lifting device according to the present embodiment. In the embodiment described above, the elevator car ceiling 2 is hung by the rope 6, but in the present embodiment, the car ceiling is hung by using the rope 6 and the crank lever 8.

That is, in both figures, 8 is a crank lever having one end attached to the upper part of the car and the other end attached to the car ceiling 2, and it is constructed so that it can be bent at substantially the center thereof. The other end of the rope 6 is attached to this bent portion.

In such a structure, the rope 6 is wound by rotating the winding drum 1 in one direction,
As shown in FIG. 8, the crank lever 8 bends and the car ceiling 2 rises. On the other hand, by rotating the take-up drum 1 in the other direction, as shown in FIG.
The crank lever 8 extends straight due to its own weight, and the car ceiling descends. Since the lowered position of the car ceiling 2 is regulated by the length of the crank lever 8 in the straight extension, the maximum lowered position can be easily regulated and the length of the crank lever 8 can be adjusted appropriately. The car ceiling 2 can be lowered to any position.

In each of the embodiments described above, FIG.
0 and FIG. 11, a car ceiling descent detection switch 9 is provided on the upper part of the car, and the elevator is configured to drive passengers only when it detects that the car ceiling 2 is located at the uppermost position. Is desirable.

In addition, in case that the landing door and the car door are opened while the car ceiling 2 is descending, as shown in FIG. 12, in order to easily inform the user that the maintenance work is being performed, "inspection work" is performed. It is also preferable to provide the display 10 "medium" on the door side. In this case, on the display 10 of "Inspection work",
It is more desirable to provide a blinking red light 11 and a speaker 12 that informs that the inspection is in progress by voice synthesis.

<Fifth Embodiment> FIGS. 13 and 14 show the structure of an elevator car ceiling elevating device according to the present embodiment. In this embodiment, a speed adjusting mechanism for adjusting the descending speed of the car ceiling 2 is further added. In both figures, 13 is a dashpot, which has a speed adjusting function. The dashpot 13 is a device for alleviating or controlling a sudden movement of the machine, and is a device in which oil is put in a cylinder and a clearance is provided therein so that a piston can slowly move. In this embodiment, one end of the rope is attached to the upper part of the car, and the other end is attached to the piston of the dashpot 13 via the pulley.
This pulley is provided on the car ceiling 2, so that the pulley and the dashpot 13 are both on the car ceiling 2 and the rope connecting them is substantially horizontal along the car ceiling 2. Therefore, when the car ceiling 2 descends, the piston is slowly pulled out in the horizontal direction as shown in FIG. 14, whereby the descending speed of the car ceiling 2 is adjusted.

The speed of the car ceiling 2 can be adjusted by using the dashpot 13 and also by providing a speed adjusting mechanism on the winding drum 1 itself.

<Sixth Embodiment> FIG. 15 shows a car ceiling holding mechanism applicable to each of the above-described embodiments. In the figure, reference numeral 23 is an electromagnetic coil, which is excited by a car ceiling descent command. Reference numeral 24 is a plunger, which moves upward in the drawing when the electromagnetic coil 23 is excited. This plunger is urged downward in the figure by an elastic force of a spring or the like, and returns to the lower position by the elastic force when the electromagnetic coil 23 is in the non-excited state. Reference numeral 25 is a U-shaped lever, which is rotatably supported.

FIG. 15A shows a state in which the car ceiling is at the uppermost position and the lever 25 holds the car ceiling 2. In this case, since the electromagnetic coil 23 is not energized and is not excited, the plunger 24 engages with the lever 25 and restricts the rotation of the lever 25. Then, when the car ceiling 2 descends, the electromagnetic coil 23 is energized and excited, so that the plunger 24 moves upward in the drawing. As a result, the engagement state between the lever 25 and the plunger 24 is released, the lever 25 becomes rotatable, and the car ceiling 2 can descend as shown in FIG. 15 (b).

After the maintenance work, when the winding handle 5 is operated to raise the car ceiling 2 to the uppermost position again, the car ceiling 2 is raised and first comes into contact with the lever 25, whereby the lever 25 rotates. In addition, the lever 25 is the plunger 2
Since it rotates along the inclined portion formed at the tip of No. 4, the plunger 24 is pushed up (the broken line in FIG. 15B represents this rotating state), and the holding state in FIG.

As a result, the holding of the car ceiling 2 at the uppermost position and the holding release when descending are automated, the work of the operator is simplified, and the work efficiency can be further improved.

[0035]

As described above, according to the present invention,
While maintaining a sufficient overhead dimension of the worker during maintenance work,
Inspection can be performed safely and smoothly.

[Brief description of drawings]

FIG. 1 is a configuration diagram when a car ceiling is descending according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a car ceiling lifting device according to the first embodiment.

FIG. 3 is a configuration diagram of a winding drum of the car ceiling lifting device according to the first embodiment.

FIG. 4 is a configuration diagram of a winding drum according to a second embodiment.

FIG. 5 is an explanatory view of a rope adjusting mechanism of the car ceiling lifting device.

FIG. 6 is a configuration diagram of a car ceiling lifting device according to a third embodiment.

FIG. 7 is an explanatory diagram of a ladder in the third embodiment.

FIG. 8 is an explanatory diagram when the car ceiling lifting device according to the fourth embodiment is raised.

FIG. 9 is an explanatory diagram of the car ceiling lifting device according to the fourth embodiment when it is lowered.

FIG. 10 is a configuration diagram when a position detection switch is used (when moving up).

FIG. 11 is a configuration diagram (when descending) when a position detection switch is used.

FIG. 12 is a diagram showing a display example during inspection work.

FIG. 13 is a configuration diagram (during rising) of a car ceiling lifting device according to a fifth embodiment.

FIG. 14 is a configuration diagram (descent) of a car ceiling lifting device according to a fifth embodiment.

FIG. 15 is a configuration diagram of a car ceiling lifting device according to a sixth embodiment.

FIG. 16 is an explanatory diagram showing a state of maintenance work by a conventional device.

FIG. 17 is an external configuration diagram of a view elevator.

[Explanation of symbols]

1 winding drum, 2 car ceiling, 3 pulley, 4 car room, 5 winding handle, 6 rope, 7 adjusting device (turnbuckle), 8 crank lever, 9 ceiling drop detection switch, 10 display board 11 flashing red light, 12
Speaker, 13 dashpot, 14 ratchet gear, 15 hoist top, 16 ratchet, 17 support, 18 ladder, 19 ladder pulley, 20 limit switch, 21 safety handrail, 22 hook, 23 electromagnetic coil, 24 plunger, 25 lever, 26 Cam.

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[Procedure amendment]

[Submission date] August 23, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

Further, in the elevators for observation that have been frequently seen in recent years, as shown in FIG. 17 , a safety handrail 21 on a car is provided .
There is also a problem in that the maintenance work of such a prospective elevator is extremely difficult because (indicated by a broken line in the figure) may not be installed due to the design.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

<Sixth Embodiment> FIG. 15 shows a car ceiling holding mechanism applicable to each of the above-described embodiments. In the figure, reference numeral 23 is an electromagnetic coil, which is excited by a car ceiling descent command. Reference numeral 24 is a plunger, which moves upward in the drawing when the electromagnetic coil 23 is excited. This plunger is urged downward in the figure by an elastic force of a spring or the like, and returns to the lower position by the elastic force when the electromagnetic coil 23 is in the non-excited state. Reference numeral 25 is an L -shaped lever, which is rotatably supported.

Claims (6)

[Claims] 1. A rotatable winding drum attached to an upper portion of an elevator car, and a rope having one end wound around the winding drum and the other end being attached to an elevator car ceiling to suspend the elevator car ceiling, An elevator car ceiling elevating device for elevating an elevator car ceiling by rotating the winding drum. 2. The elevator car ceiling lifting device according to claim 1, wherein the winding drum is composed of a ratchet gear and can be stopped at a desired position by meshing with a ratchet. . 3. The elevator car ceiling lifting device according to claim 1, further comprising a ladder having one end supported on an upper part of the car and the other end having a pulley, wherein the ladder is mounted on the upper part of the car as the car ceiling moves up and down. An elevator car ceiling lifting device, wherein an end portion having a pulley moves about the car ceiling with one end supported as a fulcrum. 4. A rotatable take-up drum attached to the upper part of an elevator car, a crank lever having one end attached to the upper part of the elevator car and the other end attached to the elevator car ceiling, and one end wound on the take-up drum. The rope has a rope that is rotated and the other end is attached to the crank lever, the crank lever has a bent portion at approximately the center, and the rope has one end attached to the bent portion of the crank lever and the winding drum. By rotating the winding lever in one direction to bend the crank lever to raise the elevator car ceiling, and rotating the winding drum in the other direction to extend the crank lever directly to lower the elevator car ceiling. Cage ceiling lifting device. 5. The elevator car ceiling elevating apparatus according to claim 1 or 4, further comprising speed adjusting means for adjusting a speed when the elevator car ceiling descends. 6. The elevator car ceiling lifting device according to claim 1 or 4, further comprising: an electromagnetic coil attached to an upper part of the elevator car; a rotatable lever holding the elevator car ceiling; and an excitation of the electromagnetic coil. It has a plunger that moves according to the state and allows or restricts the rotation of the lever depending on the moving position, and the plunger restricts the rotation of the lever when the elevator car ceiling is at the uppermost position, and controls the lever of the elevator car ceiling. The elevator car ceiling lifting device, characterized in that the elevator car ceiling is moved by the electromagnetic coil excitation state when the elevator car is descending, and the lever is allowed to rotate.