JPH0881167A - Car of elevator - Google Patents

Abstract

PURPOSE: To decrease the load of a car door by blocking the opening operation of the car door, so as to prevent the car door from being opened in a power failure, by driving a locking block by a driving part, and engaging the engaging part of this locking block with a sliding element when a power supply of the elevator is cut off. CONSTITUTION: When a pair of right and left cage doors 2B is closed in the normal operation, an exiting power supply of a solenoid 12 is turned off, a clamp 16 is operated forward by a restoring force of a compression coil spring 10, and a locking block 9 is moved forward. Then, a locking boss 9a of the locking block 9 is loosely fitted into a locking hole 5a on the lower part of a sliding element 5, so as to prevent the locking block 9 from being moved in the left direction, and the opening operation of the cage door B is prevented. When the power failure is generated and exciting current of the solenoid 12 is turned off, the locking boss 9a projectingly provided on the locking block 9 is loosely fitted into the locking hole 5a of the sliding element 5, thereby the movement of the locking block 9 is prevented, and the opening operation of the cage door 2B is blocked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car for an elevator, and more particularly to a car for an elevator having an opening operation preventing mechanism for preventing an opening operation of a door during a power failure or the like.

[0002]

2. Description of the Related Art FIG. 7 is a front view (view from the hall side) showing a conventional elevator car to which a car door of a double door type double door is attached. In FIG. 7, a reducer 21 having an input shaft connected to an output shaft of a motor (not shown) is fixed to the upper surface of the car 1 at the upper right end with the output shaft facing forward. A pulley 22A is press-fitted onto the output shaft of the speed reducer 21, and an upper end of a toothed belt 23A is wound around the pulley 22A.

A pulley 22B is provided on the front surface on the upper right side of the car 1.
Is attached via a shaft (not shown). The lower end of the toothed belt 23A described above is wound around the pulley 22B. On the front left side of the top of the car 1
A pulley 22C having the same shape as 22B is inserted into a shaft (not shown), and a toothed belt 23B is wound around the pulley 22C and the pulley 22B described above.

At the bottom of the toothed belt 23B, a rail is provided.
Twenty-six is provided beside the car 1. A pair of hanger plates 27 are provided on the rail 26 via a pair of rollers (not shown).
The upper part of the hanger plate is suspended, and the lower ends of band-shaped hanger plates 24A and 24B are fixed to the upper end of the hanger plate 27. Of these, the upper end of the hanger plate 24A is locked to the upper side of the toothed belt 23B, and the upper end of the hanger plate 24B is locked to the lower side of the toothed belt 23B described above.

Further, the upper ends of the car doors 2A and 2B are suspended by bolts from the lower ends of the left and right hanger plates 27, respectively. A pair of guide shoes (not shown) suspended from the lower ends of the car doors 2A and 2B are loosely fitted in the grooves of the sill 25 provided horizontally below the front end of the car 1.

On the front surface of the center of the right end of the car 1, there is a link 3A.
The right end of the link 3 is swingably connected via a pin (not shown) fixed to the car 1, and the left end of the link 3A is connected to the right end of a link 3B provided on the left side of the link 3A via a pin (not shown). It is connected. The left end of the link 3B is connected to the center of the front surface of the car door 2A via a pin (not shown), and a rectangular weight 6 is inserted in the center of the link 3B and slightly to the right, and is fixed to the link 3B.

In the thus constructed elevator car, when the electric motor (not shown) is driven to drive the speed reducer 21 counterclockwise in FIG. 7, the toothed belt is driven.
23A is also driven counterclockwise. Then, the pulley 22B on the right side of the car 1 is also driven counterclockwise by the toothed belt 23A, and the toothed belt 23B having the right end wound around the pulley 22B is also driven counterclockwise.

By driving the toothed belt 23B counterclockwise, the left car door 2B is driven leftward in FIG. 7 via the hanger plate 24A, and the right car door 2A is driven by the right hanger plate 24B. Driven through each car door 2
A and 2B start the opening operation. This car door 2A, 2B
In the process of opening, the link 3B moves upward with the right end swinging counterclockwise about the left end, and accordingly, the weight 6 is lifted upward to the right. Become.

By the way, an elevator is designed so that, in the unlikely event of a power failure while moving up and down the hoistway, the brake operates and stops for safety. In such a state, if a passenger inside the car forcibly opens the car doors 2A and 2B, the car may fall into the hoistway. Therefore, according to the law, the force required to open the car door during a power failure is required. The weight 6 on the front side of the car door 2A which has been defined and is described above is selected to have a predetermined weight in order to prevent the car door 2A from being easily opened.

[0010]

However, in the elevator car thus constructed, when the car door 2A is opened, the weight 6 becomes a load for the opening operation due to the counterclockwise swing of the link 3B. Therefore, the load of the driving motor increases. The weight 6 also becomes a load when the safety attached to the side surface of the car door during the closing operation touches the passenger and the car door reverses to the opening operation.
For electric motors that are accelerated after the direction of rotation is reversed,
At this time, there is a possibility that it may be an obstacle in performing the opening operation of the car door at high speed. Therefore, a method of increasing the capacity of the driving electric motor can be considered, but then there is a drawback that energy is wasted because the efficiency of the electric motor decreases while power consumption increases.

Therefore, an object of the present invention is to obtain an elevator car capable of reducing the load on the car door and preventing the car door from being opened during a power failure.

[0012]

According to the elevator car of the present invention as set forth in claim 1, a slider provided above the car door and an engaging portion are opposed to each other and are loosely fitted to the upper end of the car door. The locking block, a clamp provided above the car door with the engaging side facing the locking block of the closed car door, and the demagnetization drive the clamp to one side to slide the locking block engagement part. It is characterized in that it is provided with a drive unit for releasing the engagement with the moving element.

The elevator car according to a second aspect of the present invention is a lock in which a slider provided above a car door and a tip end thereof are opposed to each other so that the slider is swingably protruded above the car door. One piece,
It is characterized in that a drive unit is provided, which is arranged so that the tip of the locking piece of the car door in the closed state and the movable portion are opposed to each other and which releases the locking between the tip of the locking piece and the slider by excitation.

The elevator car according to a third aspect of the present invention includes a slider, which is provided above the car door and has a fitting portion, and a movable portion, which is provided above the car door and is demagnetized to move the movable portion. It is characterized in that it is provided with a drive part which is loosely fitted in the fitting part of the moving element, and the movable part is retracted from the fitting part of the sliding element by excitation.

Further, in the elevator car according to the invention described in claim 4, a car door having an engaging portion formed at an upper end thereof and a movable portion loosely fitted in the engaging portion by demagnetization provided above the car door. However, it is characterized in that the movable part is provided with a drive part that retracts from the engagement part by excitation.

[0016]

In the invention described in claim 1, when the power supply of the elevator is interrupted, the lock block is driven by the drive unit, and the engagement unit of the lock block engages with the slider, The opening operation of the car door is blocked.

Further, in the invention described in claim 2,
When the power supply of the elevator is cut off, the locking piece is driven by the driving part, and the upper part of the locking piece is engaged with the slider to prevent the opening operation of the car door.

Further, in the invention described in claim 3,
When the power supply of the elevator is cut off, the movable part is driven by the drive part, and the upper part of the movable part is engaged with the slider to prevent the opening operation of the car door.

Further, in the invention as set forth in claim 4, when the power source of the elevator is cut off, the movable part is driven by the drive part, and the upper part of the movable part is engaged with the engaging part, so that the car door Is prevented from opening.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevator car according to the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an example of an elevator car according to the first aspect of the present invention, and is a front view corresponding to FIG. 7 shown in the prior art. As in FIG. 7, a double-door double-door car door is shown. 2A and 2B are in the closed state.

In FIG. 1, what is different from the conventional car shown in FIG. 7 is that a car door opening preventing mechanism whose details will be described later with reference to FIG. 2 is provided over the upper part of the car door 2B and the right end of the car 1. The other parts are the same as those shown in FIG. 7, and the same parts as those shown in FIG.

FIG. 2 (a) is an enlarged detailed perspective view of the upper end of the car door 2B shown in FIG. 1 and its vicinity, and FIG. 2 (b) is a perspective view of the upper right end of the car door 2B. Indicates. 1 and 2A and 2B, in the car 1, a guide rail 4 is laterally provided above the car door 2B, and both ends thereof are supported by arms (not shown). A cylindrical stopper 7 is inserted into the right end of the guide rail 4 and fixed to the guide rail 4.

Further, a cylindrical portion 5b provided at the upper end of the slider 5 is inserted into the guide rail 4, and this cylindrical portion 5b is inserted.
A locking hole 5a penetrating in the front-rear direction is formed in the lower part of the locking plate 5c which is vertically provided at the lower part of the.

On the other hand, on the right side of the upper end of the car door 2B, a guide groove 2b having a substantially convex shape when viewed from the front is formed in the front-rear direction. A linear guide (not shown) is inserted into the lower portion of the guide groove 2b, and the lower portion of the linear guide has the guide groove 2b.
The lower part of the locking block 9 which is fitted in b and which is substantially convex when viewed from the front is inserted.

At the upper left corner of the front of the lock block 9,
In FIG. 2 (a) in which a cylindrical locking boss 9a is provided so as to project as shown in FIG. 2 (b) and the car door 2B is in a closed state, the locking boss 9a is located in front of this locking boss 9a. It opposes the locking hole 5a formed in the lower part of the slider 5 located above.

Further, the left end of the wire 14 is locked to the right side surface of the locking plate 5c of the slider 5 described above.
As shown in FIGS. 1 and 2 (a), the right end of the pendant passes through a pulley 13 provided on the front surface of the right end of the car 1 and hangs down to the right middle part of the car 1. Is suspended.

A lock block 9 is provided above the front of the car 1 and above the door contact side of the car door 2B in the closed state.
A substantially U-shaped clamp 16 is provided on the upper part of the above (Note: in FIG. 2A, in order to avoid complicated figures,
(Shown to the right of Lock Block 16). This clamp 16
A guide rail 15 penetrates in the front-rear direction, and both ends of the guide rail 15 are fixed to the car 1 via support arms (not shown).

A solenoid 12 is provided in front of the clamp 16. The armature protruding from the rear of the solenoid 12 is opposed to the front surface of the clamp 16. A compression coil spring 10 is provided in the front-rear direction behind the clamp 16, and the front end of the compression coil spring 10 has the above-mentioned clamp.
It abuts the rear surface of 16.

Next, the operation of the elevator car thus constructed will be described. FIG. 3 is an explanatory diagram showing the relative positions of the locking block 9 and the clamp 16 shown in FIG. 2 (a) and the locking hole 5 a of the slider 5.

In FIGS. 1, 2 and 3, when the car doors 2A and 2B are closed during normal operation, the exciting current of the solenoid 12 is turned off. Then, the clamp 16 is driven forward by the restoring force of the compression coil spring 10, and the locking block 9 is moved forward by the clamp 16 which is moved by the restoring force of the compression coil spring 10, as shown in FIG. It Therefore, the locking boss 9a of the locking block 9 loosely fits into the locking hole 5a in the lower part of the slider 5 to prevent the locking block 9 from moving to the left and to open the car door 2. Prevent.

Next, when a door open signal for the car doors 2A and 2B is output from an elevator control panel (not shown), an exciting current is also supplied to the solenoid 12 at the same time as this signal, and the rear portion of the solenoid 12 is supplied. Of the armature is projected rearward, and the clamp 16 compresses the compression coil spring 10 and is driven rearward as shown in FIG. 3 (b).

Then, the lock block 9 is also moved rearward by the clamp 16 moved to the rear side as shown in FIG. 3 (b), and the lock boss projecting from the front surface of the lock block 9 is pushed. 9a slips out of the lock hole 5a, releases the lock with the slider 5, and enables the opening operation of the car doors 2A and 2B.

In FIG. 3C, the car doors 2A and 2B are driven by the above-mentioned door open signal, and the car doors 2A and 2B are driven.
Shows the initial state in which the opening operation has started and the lock block 9 has also started moving leftward. Also, FIG.
(D) shows that when the car doors 2A and 2B are closed or when the exciting current of the solenoid 12 is turned off due to a power failure,
It is explanatory drawing which shows the operation state of the car door opening prevention mechanism when a car door 2A, 2B is opened by a passenger.

As shown in FIG. 3D, when the car door 2B is forcibly opened during a power failure of the elevator, the lock boss 9a protruding from the lock block 9 is attached to the slider 5. By blocking the movement by the locking hole 5a formed in the lower part,
The opening operation of the car doors 2A and 2B is blocked.

Next, FIG. 4 is a front view showing an elevator car according to the second aspect of the present invention, which corresponds to FIG. 1, and FIG. 5 shows an upper end portion of the car door 2C shown in FIG. It is an enlarged detailed view of the periphery. Of these, FIG. 5 (a) shows a car door 2C.
Is in a closed state, and FIG. 5B shows an initial state in which the door opening signal is input to the car door 2C in the state of FIG. 5A and the car door 2A starts the opening operation. .

4 and 5, at the upper right end of the car 1, the right end of the lever 3A, which is the same product as the lever 3A shown in FIG. 7, swings to the right of the upper end of the car door 2C via a pin. It is movably supported. At the left end of the lever 3A, the lever 3B shown in FIG.
The right end of the same lever 3B is connected. The left end of the lever 3B is connected to a substantially L-shaped slider 5A provided above the right end of the car door 2C via a pin 3b.

This slider 5A is a car door 2 at the top of the car.
It is placed on the upper surface of a guide rail 4A provided laterally on the right side from the upper end of C and is movable left and right. Guide rail 4
A stopper 7A for positioning the left end of the slider 5A is fixed to the left end of A.

A solenoid is provided on the left side of the stopper 7A.
12A is fixed to the car 1. The lower end of the armature 12a protruding from the lower portion of the solenoid 12A slightly protrudes from the lower end of the solenoid 12A in the non-excited state of the solenoid 12A in FIG. 5A.

On the other hand, on the right side of the upper end of the car door 2C, there is formed a notch 2a whose upper portion is opened in a substantially U shape.
A stepped pin 8 is provided on the left side inside the cutout 2a in a direction orthogonal to the plane of the drawing, and the stepped pin 8 is attached to the lower end of a swing claw 9A made of fluororesin inserted in the cutout 2a. Has been inserted.

As shown in FIG. 5 (a), a horizontal portion is formed on the upper end of the swinging claw 9A, and the armature 12a protruding from the lower end of the non-excited solenoid 12A is formed on the horizontal portion. The bottom edge is in contact. Notch 2a
The compression coil spring 10 is stored vertically on the lower right side of
The lower end of the compression coil spring 10 is positioned by a spring seat (not shown) fixed to the lower surface of the cutout 2a. The upper end surface of the compression coil spring 10 is loosely fitted and positioned in a spring seat (not shown) fixed to the lower surface of the right end of the swing claw 9A.

In the elevator car constructed in this way, the solenoids 2B and 2C are closed when the elevator car doors 2B and 2C are closed, and in the unlikely event of an elevator power failure.
When 12A is de-excited, the right end of the swinging pawl 9A whose upper end abuts the lower surface of the armature 12a of the solenoid 12A abuts the left end surface of the slider 5A as shown in FIG. 5 (a). This prevents the opening operation of the car door 2C.

On the other hand, during normal operation, the solenoid 12A is excited, and the armature 12a of this solenoid 12A is
As shown in FIG. 5 (b), the right end of the swinging pawl 9A is compressed by the compression coil spring 10 and is housed in the upper portion of the cutout portion 2a so that the car door 2C can be opened.

In FIGS. 5 (a) and 5 (b), a small roller bearing having the upper end surface of the roller exposed is embedded in the horizontal portion of the swing claw 9A. The friction between the lower end surface of the armature 12a of the solenoid 12A in the state (1) may be reduced to smoothly open and close the car door 2C.

Next, FIG. 6 (a) is a partial detailed view showing an embodiment of the elevator car according to the third aspect of the present invention.
Corresponding to FIGS. 5A and 5B, the car door 2D also shows a closed state. Similarly, the mounting relationship of the lever 3B shown in FIG. 6A is the same as that in FIG. 4, and the description thereof will be omitted.

In the elevator car shown in FIG. 6A, a non-excited solenoid 12B is fixed to the upper right side of the car door 2D with the armature 12b facing upward. The upper part of the car door 2D is shown in FIGS. 5 (a) and 5 (b).
A guide rail 4A is provided in the same manner as
A slider 5B is attached to A, and a recess 5b having an open lower end is formed on the lower surface of the left end of the slider 5B. The recess 5b has the above-described armature 12b.
Is loosely fitted.

In the elevator car constructed as described above, the opening operation of the car door 2D is blocked by the armature 12b during a power failure of the elevator, and the armature 12b is energized by the solenoid 12B during a steady state. Is sucked into the solenoid 12B to enable the opening operation of the car door 2D.

Further, FIG. 6 (b) is a partial detailed view showing an embodiment of the elevator car according to the present invention, which corresponds to FIG. 6 (a) and is similar to FIG. 6 (a). Shows the state where the power supply of the elevator is out of power. Also in FIG. 6B, the mounting relationship of the lever 3B is the same as that in FIG. 4, and the description of this same portion is omitted.

In FIG. 6 (b), a recess 2b is formed on the right side of the upper end of the car door 2E. In the car 1, a solenoid 12B has an armature 12b above the recess 2b of the car door 2E in the closed state. It is installed face down.

Further, in the armature 12B, the right side surface of the armature 12B is brought into contact with the lower left side surface of the slider 5A which is the same as the slider 5A shown in FIG. 5 mounted on the guide rail 4A. ing.

In the elevator car constructed as described above, during steady operation, the solenoid 12B is excited and the armature 12b is attracted upward, and the elevator 2B is retracted upward from the recess 2b formed in the car door 2E. Thus, the lock between the armature 12b and the recess 2b is unlocked.

On the other hand, if the solenoid 12B is demagnetized due to a power failure of the elevator, the armature 12b protruding downward is loosely fitted in the recess 2b formed in the car door 2E, as shown in FIG. 6 (b). To prevent the opening operation of the car door 2E.

In the above embodiment, the car door type is
Although the description has been given to the case of the double-door double door, the present invention can be similarly applied to a single-door elevator car, and can be applied regardless of the number and type of the car doors.

[0053]

As described above, according to the invention of claim 1,
The slider provided above the car door and the engaging portion face each other, and the lock block is loosely fitted to the upper end of the car door, and the lock block of the closed car door is placed opposite the engaging side. A clamp is provided above the door, and a drive unit that drives the clamp to one side by demagnetization to disengage the engagement of the lock block from the slider is provided in opposition to the clamp. When there is a power outage, the drive unit drives the lock block,
By engaging the engaging part of this lock block with the slider to prevent the opening operation of the car door, the load on the car door is reduced, and the car door of the elevator can be prevented from opening during a power failure. Can be obtained.

According to the second aspect of the present invention, a locking piece having a tip opposed to a slider provided above the car door is provided so as to swing freely on the upper part of the car door. By providing the car with a drive unit that opposes the end of the locking piece of the car door in the closed state and the movable part and unlocks the tip of the locking piece and the slider by excitation, when the power supply of the elevator is interrupted, The drive part drives the locking piece, and the upper part of this locking piece is engaged with the slider to prevent the opening operation of the car door, so the load on the car door is reduced and the car door is opened during a power failure. You can get an elevator car that can prevent

According to the third aspect of the invention, the slider having the fitting portion is provided above the car door, and is loosely fitted to the fitting portion of the slider by demagnetization, and fitted by excitation. By providing a drive unit that retracts from the joint unit above the car door, when the elevator power fails, the drive unit drives the movable unit,
Since the upper part of this movable part was engaged with the slider to prevent the opening operation of the car door, it is possible to reduce the load on the car door and obtain an elevator car that can prevent the car door from opening during a power failure. it can.

Further, according to the invention of claim 4,
By forming an engaging part at the upper end of the car door, loosely fitting the engaging part by demagnetization, and providing a drive part that retracts from the engaging part by excitation above the car door, when the power supply of the elevator is interrupted,
Since the movable part is driven by the drive part and the upper part of this movable part is engaged with the engaging part, it is possible to reduce the load on the car door and obtain an elevator car that can prevent the car door from opening during a power failure. You can

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an elevator car according to the first aspect of the invention.

FIG. 2 (a) is an enlarged perspective view showing a main part of FIG.
(B) is a partial detailed view of (a).

FIG. 3 is a diagram showing an operation of the invention described in claim 1,
(A) is a diagram showing a state where the lock block is engaged with the slider, (b) is a diagram showing a state where the lock block is separated from the slider, and (c) is a state of (b). FIG. 6 is a diagram showing a state in which the car door has started an opening operation, and FIG. 6D is a diagram showing a state in which the car door is artificially opened in the state of FIG.

FIG. 4 is a front view showing an embodiment of the elevator car according to the second aspect of the invention.

5 (a) is a partially enlarged detail view showing a state where an elevator car in the state shown in FIG. 4 is locked, and FIG. 5 (b) is a partially enlarged detail showing an unlocked state. Fig.

6A is a partially enlarged detailed view showing an embodiment of an elevator car of the invention according to claim 3, and FIG. 6B is an embodiment of an elevator car of the invention according to claim 4; The partial expanded detailed view which shows an example.

FIG. 7 is a front view showing an example of a conventional elevator car.

[Explanation of symbols]

1 ... Basket, 2A, 2B, 2C, 2D, 2E ... Basket door, 2
b ... Guide groove, 3A, 3B ... Link, 4, 4A, 15 ... Guide rail, 5, 5A, 5B ... Slider, 5a ... Lock hole, 5b
... Cylindrical part, 5c ... Locking plate, 6,6A ... Weight, 7,7A ...
Stopper, 8 ... Stepped pin, 9 ... Lock block, 9A ...
Swing claw, 9a ... Locking boss, 10 ... Compression coil spring, 12,12
A, 12B ... Solenoid, 12a, 12b ... Armature, 13
… Pulley, 14… Wire, 16… Clamp.

Claims (4)

[Claims] 1. A lock block in which a slider provided above a car door and an engaging portion on one side are opposed to each other and are loosely fitted to an upper end of the car door, and the chain of the car door in a closed state. Engagement between a clamp provided above the car door with the other side of the lock block facing the other side and the clamp side, and the slider of the engagement part of the lock block by driving the clamp to one side by demagnetization. Elevator car with drive to uncouple. 2. A lock piece having a tip opposed to a slider provided above the car door and swingably projecting above the car door, and the chain of the car door in a closed state. An elevator car provided with a drive unit that opposes a tip of a lock piece and a movable portion to release the lock between the tip of the lock piece and the slider by excitation. 3. A slider provided above the car door and having a fitting portion formed therein, and a movable part provided above the car door, the movable portion being loosely fitted into the fitting portion of the slider by demagnetization, An elevator car having a drive unit in which a movable portion is retracted from a fitting portion of the slider by excitation. 4. A car door having an engaging portion formed at its upper end, and a movable portion loosely fitted in the engaging portion by demagnetization provided above the car door, and the movable portion is moved from the engaging portion by excitation. An elevator car with a retractable drive.