JPH02233494A - Floor door safety device for working elevator - Google Patents

Abstract

PURPOSE:To prevent a worker or the like from falling down into a lifting passage by detecting that a working elevator reaches a desired floor, opening the door locking magnetic lock of the floor where the elevator reaches, and keeping the magnetic locks other than that of the floor where the elevator reaches in interlocking conditions. CONSTITUTION:When a working elevator reaches a desired floor, detecting switches 111-115 turn on, the control means for them operate, and electromagnetic locks 151-155 of the floor where a working elevator reaches are unlocked to open the door of the floor where the working elevator reaches. After the control means of the floor where the working elevator reaches operate, an interlocking means 14 operates, the control means of the floors other than the floor where the working elevator reaches are interlocked, and magnetic locks 151-155 for them are kept in locking conditions even if detecting switches 111-115 are turned on intentionally.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a safety device for a landing door in a construction elevator such as a long-span construction elevator.

(Prior art) A construction elevator supports an elevating body (construction elevator car) so as to be movable up and down between pillars installed vertically and parallel to each other at a desired distance from -1, and can be raised and lowered using pin racks, etc. It has become. A bellows-type door that is manually opened and closed is installed at each landing where the elevators land to prevent workers and others from falling into the hoistway.

FIG. 5 shows an example of a conventional bellows landing door and its safety mechanism.

In the figure, 1 is a bellows-type door that opens and closes the landing entrance.One end of this door 1 is fixed to a support 2, and the other end is guided so that it can be opened and closed on a sill 3 installed at the landing entrance. At the same time, a stopper 5 is provided on the support 4 facing the opening/closing end of the door 1.
A limit switch 6 is installed to check the closed state of the This limit switch 6 is intended to prevent the elevator from starting unless the door 1 is completely closed and the limit switch 6 is turned on. Further, the stopper 5 is provided with a manual locking mechanism (not shown) for locking the door 1 in the closed state, and this locking mechanism locks the opening/closing end of the door l to the stopper 5. 1 will not open unnecessarily.

(Problem to be Solved by the Invention) In the conventional construction elevator landing door as described above, the locking mechanism is manually operated.
The locking mechanism can be released and the door l can be easily opened even on a floor without an elevator, but there is a risk of workers etc. falling into the hoistway, which poses a safety problem.

The present invention solves the above-mentioned problems and provides a safety device for a landing door of a construction elevator that ensures the safety of the landing entrance by preventing doors other than those on the floor where the elevator car is located from being opened and closed. With the goal. [Means for Solving the Problems] The safety device for the landing door in the construction elevator of the present invention includes an electromagnetic lock that locks the landing door in a closed state for opening and closing the landing entrance on each floor of the construction elevator, and an electromagnetic lock facing each floor. A detection switch is installed in the building and is turned on by the construction elevator car, and a detection switch is installed corresponding to each floor and is activated by the on signal of the detection switch that is activated when the construction elevator car lands on the scheduled floor. A device comprising: a control means for opening an electromagnetic lock on a floor; and an interlock means for interlocking an electromagnetic lock on a floor other than the landing floor of the construction elevator car based on a signal from the activated control means among the control means. It is.

．． [Function] When the construction elevator car lands on the scheduled floor, the detection switch is turned on, the corresponding control IJ means is activated, and the electromagnetic lock on the landing floor of the construction elevator car is unlocked. This will enable the landing door of the construction elevator car to be opened.

When the control means for the landing floor of the construction elevator car is activated, the interlock means is activated to interlock the control means for the floors other than the landing floor of the construction elevator car, and the detection switch is intentionally turned on. Even when activated, the corresponding electromagnetic lock is held in a locked state.

Therefore, in the present invention, only the landing door on the floor where the construction elevator car is located cannot be opened or closed, and the safety of the landing entrance can be ensured.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a circuit diagram showing an example in which the landing door safety device according to the present invention is applied to a construction elevator for use on the fifth floor.

? , Ll and L2 are DC power lines, IO. ~1
0 and 0 are electromagnetic lock control relays corresponding to the first to fifth floors of the building under construction, respectively. Electromagnetic lock control relay 10 on the first floor,
is the hoistway of construction elevator car l2 corresponding to floor l (
) and self-holding contacts 10, . It is connected in parallel between DC power supply lines Ll and L2 via. In addition, the electromagnetic lock control relay 1 on the second floor
0■ is the detection switch 11 installed in the hoistway corresponding to the second floor! and self-holding contact 10■. It is connected in parallel between DC power supply lines Ll and L2 via.

The electromagnetic lock control relay 103 on the third floor includes a detection switch 11 and a self-holding contact 10 provided in the hoistway corresponding to the third floor.
, 1 are connected in parallel between the DC power lines Ll and L2.

The electromagnetic lock control relay 114 on the fourth floor includes a detection switch 114 and a self-holding contact 10 provided in the hoistway corresponding to the fourth floor.
4. It is connected in parallel to the DC power supply line LIL2 via the DC power supply line LIL2.

Further, the electromagnetic lock control relay 105 on the 5th floor includes a detection switch 11 provided in the hoistway corresponding to the 5th floor, and a self-holding contact 10S. It is connected in parallel between DC power supply lines Ll and L2 via.

The detection switches 11+ to 11 for the first to fifth floors are turned on by a cam 13 (see FIG. 2) provided on the construction elevator car 12.

Reference numeral 14 denotes an interlock relay that enables the electromagnetic lock control relay on the floor where the construction elevator car 12 is located, and controls the electromagnetic lock control relays on other floors so that they cannot be activated. is 1 to 5 above.
Normally open contact lOlb of floor electromagnetic lock control relay 10I-10s
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~14, are the self-holding contacts 10, ~10S of the electromagnetic lock control relays IOT~10S on the 1st to 5th floors. are connected in parallel.

15. -15, are electromagnetic locks installed corresponding to the doors of each landing on the 1st to 5th floors, and are structured so that they can be opened and closed manually using a key (not shown). Each electromagnetic lock 15. ~1
5, is the electromagnetic lock control relay IL~10 of the corresponding floor,
The DC power supply line L1. is connected to the DC power line L1. It is connected in parallel between L2.

FIG. 3 is an overall view of the bellows-type landing door l and the locking mechanism on each floor, and FIG. 4 is a sectional view showing the relationship between the locking mechanism and the electromagnetic lock.

In the same figure, at the entrance/exit of the hall, a column-shaped stopper 16 is vertically provided on the floor of the hall, with which the end support 1a engages when the hall door 1 is closed.

A concave engagement part 17 into which the end support 1a fits is formed in the upper part of the stop flange 16 and opens in the direction of the landing door 1. A lock lever 18 for locking the end support 1a to the collar 1 and the collar 16 is disposed in a direction crossing the recess 17a, and one end thereof is rotatably supported by the engagement part 17 by a pin 19, and the other end is is capable of engaging and disengaging from a groove 17b formed in the engaging portion 17, and an electromagnetic lock 15 is fixed to the retaining portion l7 on the groove 17b side (electromagnetic lock l).
5! ~15, are also the same, so we will only discuss the electromagnetic lock on the first floor.)

The electromagnetic lock 15l has a lock pin 20 that is always urged in the protruding direction by a spring or the like, and this lock pin 20 is attached to the engaging portion 1.
A hole 18a is formed in the lock lever 18 so as to pass through the groove 17b of the lock lever 18 at a right angle.

Next, the operation of the safety device of this embodiment configured as described above will be explained.

For example, when the construction elevator car 12 lands on the first floor, the cam 13 moves to the detection switch 1 as shown in FIG.
11, and turns on the detection switch 11. Along with this, as shown in Figure 1, L1→ill→14+→
10l→L2 closed circuit, electromagnetic lock control relay 101 on the first floor
is energized and self-retained by closing its contacts 10. Then, when the constant contact point 10ic is opened, Ll→l
01,→15+→L2 closed circuit and 1 open electromagnetic lock 15+?
energized, the lock pin 20 is moved backward and removed from the hole 18a of the lock lever 18, and the lock to the lock lever l8 is released.

Therefore, when a worker in the construction elevator car 12 or in the landing rotates the lock lever 18 and removes it from the groove 17b of the engaging part 17, the locked state of the door 1 to the end support 1a is released, and the worker in the landing is released. Door 1 can be pulled open.

On the other hand, when the electromagnetic lock i'8') relay IO, is energized by the ON operation of the detection switch 111, the interlock relay 14 is activated by closing the regular contact 100 as shown in FIG. 10I. →14→L2 is energized by the closed circuit, so its normally closed contacts 141 to 15 are open.
．． For this reason, there are no construction elevator cars 12 in 2 to 5.
Floor detection switch 1l! ~11, even if it is turned on mischievously or intentionally, the corresponding electromagnetic lock control relay 10
■~10, are not energized.

Therefore, the landing door 1 of the floor where the construction elevator car 12 is not present is held in a locked state, the landing door 1 cannot be opened without permission, and workers and the like can be prevented from falling into the hoistway. At this time, interlock relay l4
Even if the normally closed contact 14 is opened, the electromagnetic lock control relay 101 on the first floor is self-held and will not be interlocked.

Even when the construction elevator car l2 lands on the 2nd to 5th floors other than the 1st floor, the situation is similar to the above-mentioned case of the 1st floor.

Therefore, in the above-mentioned embodiment, the landing doors 1 on floors other than those on which the construction elevator car 12 is stopped cannot be opened without permission, thereby preventing workers etc. from falling into the hoistway. In addition to this, the safety of workers and others can be ensured.

Note that the safety device in the present invention is not limited to the one-relay type shown in the above embodiment.

Also, in the above embodiment, the case of 5th floor was described, but
The present invention is not limited to this.

[Effects of the Invention] As described above, according to the present invention, when a construction elevator car lands on a scheduled floor, this is detected and the electromagnetic lock for locking the landing door of the landing floor is opened. The electromagnetic locks on floors other than the landing floor of the construction elevator car are kept in an interlocked state, so the landing doors on floors other than the landing floor of the construction elevator car cannot be opened without permission, and workers etc. can be prevented from falling into the hoistway, and the safety of workers etc. can be ensured.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an example of a landing door safety device for a construction elevator according to the present invention. FIG. 2 is an explanatory diagram showing the relationship between the construction elevator car and the detection switch. FIG. 3 is an overall front view showing the relationship between the landing door and the lock mechanism in this embodiment. FIG. 4 is a sectional view showing the relationship between the door lock mechanism and the electromagnetic lock in this embodiment. FIG. 5 is a schematic front view of a landing door mechanism of a conventional construction elevator. [Explanation of symbols of main parts] l... Hall door 10. ~10s...Electromagnetic lock control relay 11, ~l
ls...detection switch 12...elevator car 14...interlock relay 15+~15s...electromagnetic lock 16...stopper 17...holding part l8...lock lever - Fig. 4, Fig. 5 figure

Claims (1)

[Claims] (1) An electromagnetic lock that opens and closes the landing entrance on each floor of the construction elevator, and a detection switch that locks the landing door in a closed state, and a detection switch that is installed opposite each floor and is turned on by the construction elevator car, and corresponds to each floor. a control means for opening an electromagnetic lock on a corresponding floor by being activated by an on signal of the detection switch that is activated when the construction elevator car lands on a scheduled floor; A landing door safety device for a construction elevator, comprising interlock means for interlocking electromagnetic locks on floors other than the landing floor of the construction elevator car according to a signal from a control means.