JPH01226691A - Cage door locking device for elevator - Google Patents

Abstract

PURPOSE:To prevent a door from being opened further by installing a lock lever for engaging a cage latch with the block plate of a cage door in the state where the case door is opened a little during the stop of a cage due to the power interruption during the elevation/lowering traveling of the cage onto a same shaft to a lock releasing lever. CONSTITUTION:If a cage 2 stops because of power interruption during traveling, a person wants to open a cage door 3 from inside the cage 2 in the course between the boarding places, and when the cage door 3 is opened a little, a door closure releasing lever is released from a door closure releasing cam, and a lock lever 10J presses a latch 10d installed onto the cage 2 in the locking direction, and is engaged with a block plate 10k installed onto the cage door 3. Because of the engagement, the cage door 3 is not opened further, and safety an be secured.

Description

[Detailed description of the invention] [Industrial application field]

This invention relates to an elevator car door locking device.

[Conventional technology]

In an elevator, it is dangerous to open the car door when the car is located outside the locking zone where the landing door and the car door engage, so in the above conditions, the car is opened using an electromagnet or mechanically. A car door locking device has been proposed to prevent the door from opening. That is, as shown in Japanese Utility Model Application Publication No. 54-127358, there is a car door which is locked or unlocked by turning on and off an electromagnet using a control circuit. In addition, as a mechanical car door lock device,
- As shown in Japanese Patent Publication No. 8629, cams or metal fittings for preventing door opening are provided in all zones other than the engagement zone to prevent the car door from opening;
As shown in Japanese Patent No. 59, there was a car door which was provided with an engagement detection member on the door of the landing, and the car door was unlocked only when the detection member and the operating mechanism were engaged.

[The problem that the invention tries to solve! 1 [] Among conventional elevator car door locking devices, those that use electromagnets are expensive and require wiring to the car in order to issue commands to turn the electromagnet on and off using a control circuit. However, there are problems in that malfunctions may occur due to voltage fluctuations or warping of sliding parts, or the car door may malfunction and lock when the door is opened normally. In addition, the mechanical car door locking device (■) above requires a cam or metal fitting to be installed in the express zone of the elevator to prevent the door from opening.
These are expensive to install. The above car door locking device (■) will prevent the car from passing through the landing while the car travels a predetermined distance and stops in response to an abrupt stop command if the car door is pried open from within the car while the car is moving up and down. At this time, the locking detection member installed on the landing door engages with the operating mechanism, causing the car door to be unlocked or the locking device to be damaged, causing the car door to open between the landings. There was a problem that the car might stop. The invention was made in order to solve the above problems, and by using an 81 mechanical system that does not use an electric actuator such as an electromagnet, it is highly reliable and inexpensive, and the car It is possible to reduce the cost by providing the lock release cam only in the engagement zone between the door and the landing door, and it is also possible to pry open the car door between the landings while the car is moving up and down or when the car is stopped due to a power outage. To provide a car door locking device for an elevator, which can be locked even when the car door opens slightly and can ensure safety by preventing the car door from opening any further. [Means for Solving the Problems] The elevator car door locking device according to the present invention has a shaft rotatably supported above the car doorway that corresponds to the locking zone between the landing door and the car door. A lock release lever is supported and engaged with a lock release cam provided only at the car door, a door release lever is held and supported by a door release cam fixed to the car door at the fully closed position of the car door, and a lock lever that presses the latch attached to the car door in the direction of locking the car door when the car door is slightly opened outside the engagement zone, and a stopper that engages with the latch on the car door to lock the car door; It has been reserved for.

[For production]

In the elevator car door locking device according to the present invention, the door release lever is supported and engaged with the door release cam provided on the car door during normal ascending and descending movement of the car, so that the lock release lever can be moved to each floor. It is possible to run the car without touching the lock release cam installed on the landing side, and if you try to open the car door from inside the car between landings while the car is running or when the car is stopped due to a power outage. When the car door is slightly opened, the door release lever is released from the door release cam, and the lock lever pushes the latch attached to the car in the locking direction and engages with the stopper attached to the car door. By locking the car door so that it cannot be opened any further, and by keeping the latch pressed against the latch by the lock lever even after it is released, it is possible to prevent the car door from opening further while the car is running. , the car passes through the retention zone, the lock release lever is supported and engaged with the lock release cam, and the shaft rotates,
The car door can be prevented from opening even if the lock lever is separated from the latch. In addition, when the car stops at a position corresponding to the landing and the car door is opened normally, the car opens slightly due to the door opening operation of the door machine, and even if the door release lever comes off the door release cam, the car will not lock. By supporting and engaging the release lever with the lock release cam, the car door opens without any trouble.
The door can be closed and closed smoothly. It is a mechanical locking device with a simple structure in which three levers are fixed to a single shaft installed above the car entrance.It is an engagement zone on the landing side of each floor where the car stops the lock release cam. It is only necessary to fix the lock release cam at the corresponding position, and the lock release cam can be easily provided.

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, 1 is an elevator car that goes up and down a hoistway (not shown), 2 is a girder fixed above the entrance 1a of the car 1, 3 is a car door that opens and closes the entrance 1a, and 4 is the upper end of the car door 3. 5 is a door rail fixed to the above-mentioned part 2 and extending in the radial (left and right) direction of the car 1;
6 is a door machine placed on girder 2, 7 is door hanger 4
A door hanger roller is pivotally mounted to hang the car door 3 on the door rail 5 and move it along the rail 5; 8 is a link mechanism that connects the door machine 6 and the car door 3; 9 is a link mechanism for the car door 3; A vane that is fixed to the outer surface of and extends in the vertical direction. In addition, the structure and operation of each part mentioned above are the same as that of a conventional elevator. A car door 10a according to this embodiment is rotatably supported at both ends via bearings on a girder 2 fixed above the doorway 1a of the car 1, and extends parallel to the door rail 5 in the width direction of the doorway la. shaft,
10b is a lock release lever fixed to one end of the shaft 10a, and 10c is a roller pivotally attached to the tip of the lock release lever 10b. Vane 9 of car door 3 is used as a retaining member
is supported and engaged via a roller 10c with an isosceles trapezoidal lock release cam 12 having a height (A), which is fixed to the landing side and is disposed only at a position corresponding to the locking zone of each floor to be engaged, The shaft 10a is configured to be rotated in the unlocking direction when engaged. 10d is a latch with a roller 10e pivotally attached to its intermediate portion, and the base end of the latch 10d is connected to the spar 2.
It is rotatably attached to a bracket 10i fixed to the shaft 10m by a pin 10f in a direction perpendicular to the axial direction of the shaft 10m. A latch stopper 10g fixed to the girder 2 is loosely inserted into the tip of the latch 10d, and this stopper 10g
A compression spring 10h fitted in is interposed between the girder 2 and the tip of the latch 10d, and this tip is urged outward away from the car 1 by the compression spring 10h. 10j is axis 10
This is a lock lever that is fixed to the middle part of a and whose tip engages with the latch 10d via a roller 10e. Reference numeral 10 denotes a stopper which is pivotally mounted to the door hanger 4 of the car door 3 at the lower right side so as to be rotatable in the right direction, and is engaged with a latch 10d.
I is a lock release wire whose upper end is connected to the lower left corner of the stopper 10 and which extends downward along the outer surface of the car door 3;
10ff1 is a compression spring that is interposed between the pad 10 and the door hanger 4 and biases the pad 10k in the locking direction. Furthermore, 10n is a door release lever fixed to the other end of the shaft 10a, 10p is a roller pivoted to the tip of the door release lever 10n, and 10q is a door release cam fixed to the outer surface of the door hanger 4. The cam surface of this cam 10q has a high point parallel to the outer surface of the door hanger 4 on the door closing side.
An inclined surface approaching the outer surface of the door hanger 4 from this surface is formed on the door opening side, and the door release lever 10n is connected to the door release cam 10.
It is configured to be supported and engaged with the cam surface of q via a roller 10p. A stopper 10r is fixed to the girder 2 and comes into contact with the door release lever 10n to restrict the amount of rotation of the shaft 10a in the locking direction. Next, the operation of this embodiment will be explained. ■ Normal car door closing operation When the car 1 is stopped at a predetermined position corresponding to the landing, a door closing command is issued from a control circuit (not shown), the door machine 6 is operated, and the car door is closed via the link 8. Door 3 closes. At this time, the vane 9 attached to the car door 3 closes the landing door at the same time. In the lock device 10, since the roller 10c of the lock release lever 10b is initially pressed by the lock release cam 12, the lock device 10
Since the latch 10i does not push the latch 10d, the latch 10d is unlocked by the compression spring 10h. Furthermore, when the car door 3 comes close to fully closed, the door closing release cam 1
Since the roller 10n rides on the high part of the cam surface of 0q, the shaft 10a is rotated by the door close release lever 10n, and the lock release cam 12 and the roller 10c of the lock release lever 10b are rotated.
A gap B is created between the two (see Figure 3). In this state, the car 1 moves up and down. During normal driving, the lock release cam 12 and the lock release lever 1
Since there is a gap B between rollers 10c and 0b, they do not come into contact with each other, and the car 1 passes through the landing of the floor without having to stop. ■ Unauthorized opening of a car door while the elevator is running If an attempt is made to pry open car door 3 from inside car 1 while the elevator is running, a door close switch (not shown) is activated to open car door 3 by about 10 degrees. However, when a sudden stop command is issued, the car 1 travels a predetermined distance and then stops. If there is no retention zone where the vane 9 of the car door 3 engages with the landing door until the car 1 stops, the car door 3
If the door tries to be opened more than the above, the door release lever 1
0n roller 10p descends from the high point of the cam surface of the door release cam 10q and comes off, so the door release lever Io
The shaft 10a is rotated counterclockwise in FIG. 3 by n. This rotation of the shaft 10a causes the lock lever 10j to press against the roller 10e of the latch 10d, rotate the latch 10d, and engage and lock the latch 10d with the stopper 10k attached to the car door 3. For this reason, the cage door 3
cannot be opened any further. Furthermore, if the landing door has a locking zone where the vane 9 of the car door 3 engages while the car 1 flows and moves until it stops, the latch 10d described above engages the stopper 10k. In this state, the roller 10c of the four-wheel release lever 10b rides on the lock release cam 12, and the lock release lever IQb
The shaft 10a rotates in the unlocking direction, and the lock lever 10j comes out of contact with the roller 10e of the latch 10d, but the latch 10d and the stopper IQk remain engaged, and the car door 3 is released. It can be opened even more. Furthermore, after the roller 10C of the lock release lever 10b rides on the lock release cam 12, the length C of this cam 12 is
It is difficult to pry open the car door 3 from inside the car 1 while passing through the car, and the door cannot be opened inside the shell. ■ Abnormal stop due to power outage If there is a power outage while car 1 is running and car 1 stops with car door 3 away from the landing, opening car door 3 slightly from inside car 1 will release the door. The roller 10p of the door close release lever 10n has come off from the cam 10q, and the lock release cam 12 is not at the stop position of the car L, so the lock release lever I
When the roller 10c of Qb protrudes toward the landing and the shaft 10a rotates in the unlocking direction, the lock lever 1
0j presses the latch 10d and engages the stopper 10k,
The locking device 10 enters the locked state. In addition, when trying to rescue a passenger in car 1 that has stopped abnormally from the landing side, if car door 3 has stopped at a position above and behind the landing, the door to the landing must be opened and the release wire 101 pulled. The driver pulls the pad 10k, disengages the pad 10 from the latch 10d, releases the lock by the locking device 10, opens the car door 3, and rescues the passenger. moreover,
When the car 1 is stopped at a position below the landing, the door of the landing is opened, the stopper 10k is directly pushed down, and the engagement between this and the latch is released to rescue the passenger. Then, if car 1 abnormally stops far from the landing, move car 1 closer to the landing using manual winding and rescue the passengers using the above operation. ■ Normal car door opening operation Car 1 is on the desired floor When the locking device 10 reaches the predetermined position corresponding to the landing and stops, the roller 10p of the door release lever 10n is placed on the high position of the door release cam 10q and the lock device 10 is in the unlocked state. The door machine 6 starts the door opening operation in response to the door opening command from the circuit, and the link 8
The car door 3 opens slightly through the door, and the roller 10p of the door release lever 10n comes off from the high position of the door release cam 10q, and the shaft 1
Even if 0a rotates, the roller 1 of the lock release lever 10b
When 0c gets on the lock release cam 12 at the stop floor position,
The lock device 10 remains unlocked, and the car door 3 completes opening together with the landing door. [Effects of the Invention] As explained above, according to the present invention, the door release lever is supported and engaged with the door release cam provided on the car door during normal ascending and descending movement of the car. The car can run without the lock release lever fixed on the same shaft as the lever coming into contact with the lock release cam installed on the landing side of each floor. If you try to open the car door from inside the car, opening the car door a little will release the door release lever from the door release cam, and this lever and the lock lever provided on the same shaft as the above lock release lever will close to the car. the attached latch,
The car door can be locked to prevent it from opening any further by pushing it in the locking direction of the car door and engaging the stopper attached to the car door.This locked state can be maintained by pressing the latch with the lock lever. Since the attachment can be maintained even after release, safety is high. In addition, when the car stops at a position corresponding to the landing and the car door is opened normally, the car door opens slightly due to the door opening operation of the door machine, and even if the door release lever comes off the door release cam, Since the lock release lever is supported and engaged with the lock release cam, the door can be opened without any trouble, and the door can be closed smoothly, resulting in high reliability. It has a simple structure with three levers fixed to a single shaft installed above the car entrance, and the lock release cam is only installed at the position corresponding to the locking zone on the landing side of each floor where the car stops. Coupled with the fact that the unlocking cam can be easily installed, an inexpensive mechanical car door locking device can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an elevator car door locking device according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along the line ■-■ in FIG. 1, and FIG. FIG. 4 is an enlarged sectional view taken along line 1131, and FIG. 4 is an enlarged sectional view taken along line ■-■ in FIG. 1... Car, la... Doorway, 2... Girder, 3 - Car door 10 - Locking device, 10a... Shaft, 10b -
Lock release lever, 10c, 10e, 1Qp-o-ra,
10d latch, 10h, 10m compression spring, 10i
・・Bracket, 10J・・Platform for lock lever 110, 101・Release wire, 10N・Door close release lever,
10q... Door close release cam, 12 Lock release cam. Note that the same reference numerals in the figures indicate the same parts. Agent Masuo Oiwa (2 others) Recruitment Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A lock release cam has a shaft rotatably supported above the car entrance in parallel with the width direction of the entrance, and is placed on this shaft only at a position corresponding to the engagement zone where the landing door and the car door engage. A lock release lever is supported and engaged with a door release cam fixed to the car door, and a door release lever is engaged and supported in the fully closed position of the car door with a door release cam fixed to the car door. Fix the lock lever that is pressed in the direction of locking the car door when the car door is slightly opened outside the zone,
A car door locking device for an elevator, characterized in that a stopper is attached to the car door for locking the car door by engaging with the latch.