JPH0117578Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the structure of an unlocking device for an elevator hall.

First, the elevator hall system will be explained with reference to FIG.

In the figure, 1 is the doorway of the elevator hall, 2 is the door that opens and closes it, 2a is the hanger of door 2, 3 is a hanger case fixed to the upper edge of the doorway 1 and supports the hanger 2a, 4 is the door 2 5 is a movable roller arranged opposite the fixed roller 4 on the back surface of the door 2; 6 is a movable roller pivotally mounted on the back surface of the door 2 with the movable roller 5 pivoted on one side; The arm that was
7 is a lock device, 7a is a hook bar of the lock device 7 whose middle part is pivotally supported by the hanger 2a, 7b is a hook provided at one end of the hook bar 7a, and 7c is a link between the other end of the hook bar 7a and the arm 6. The link 7d is fixed to the hanger case 3 and faces the hook 7b, and the link 8 is a link provided on the door (not shown) of the car and connected to the fixed roller 4 when the car (not shown) faces the landing. A drive plate disposed between the movable roller 5, 9 an unlocking device provided on the door 2, and 9a an operating piece of the unlocking device 9 provided on the back side of the door 2, facing the arm 6. It is located.

That is, when the door 2 fully closes the entrance/exit 1, the hook 7b engages with the engaging element 7d as shown in FIG. 1, locking the door 2 and preventing the door from being opened by manual operation from the elevator landing. . Then, when the car stops at the landing and the car door opens, the movable roller 5 is pressed and displaced by the drive plate 8 due to the initial movement of the car door, and the first
In the figure, the hook bar 7a is rotated clockwise, the hook 7b is disengaged from the engaging member 7d, and the door 2 is opened together with the car door via the drive plate 8. Then, when the car door is closed, the door 2 is also closed together, and in the fully closed position, the hook 7b rides on and engages the engaging element 7d, and the door 2 is locked. On the other hand, it is necessary to open the door 2 to inspect the inside of the elevator hoistway, but at this time, operate the unlocking device 9 using a predetermined key from the keyhole of the unlocking device 9 on the front side of the door 2. The door 2 is opened by displacing the arm 6 via the operating piece 9a to release the hook 7b. However, since the keyhole of the unlocking device 9 is provided in the elevator landing, there are problems such as the door 2 being opened by mischief and people falling into the hoistway, or the keyhole becoming large and spoiling the aesthetics. Ta.

This invention solves the above-mentioned drawbacks and aims to provide an unlocking device for an elevator hall that has a small keyhole and is difficult to be tampered with.

An embodiment of this invention will be described below with reference to FIGS. 1 to 6.

In the figure, the same symbols as in Figure 1 indicate the same parts, 2b
9b is an outer cylinder of the unlocking device 9, and a flange 9c is provided at one end of the through hole 2.
b, a screw 9d is provided on the outer periphery, and an opening 9e is provided on the flange 9b side. 9f is the bottom surface of the opening 9e, 9g is a hole penetrating the bottom surface 9f, 9h is a nut that is screwed into the screw 9d and clamps the door 2 with the flange 9c;
9i is a shaft made of a round bar and loosely inserted into hole 9g,
9j is a C ring that is engaged with the middle part of the shaft 9i and provided on both sides of the bottom of the outer cylinder 9b; 9k is a screw that is provided at the end of the shaft 9i outside the outer cylinder 9b;
l is a key provided inside the opening 9e of the shaft 9i; 9m is a nut screwed into the screw 9k and placed on both sides of the actuating piece 9a to clamp the actuating piece 9a;
9n is an engagement piece that is welded to the end face inside the opening 9e of the shaft 9i and has an irregularly shaped approximately triangular shape and has an outer diameter larger than the diameter of the shaft 9i; 9p is loosely fitted in the opening 9e, and the center portion is attached to the shaft; 9i, a lid piece 9 that is loosely fitted to the key 9l and has a recess 9g on its surface that corresponds to the shape of the engagement piece 9n and into which the engagement piece 9n is loosely fitted;
r is a push spring whose both ends face the bottom surface 9f and the back surface of the lid piece 9p, respectively; 10 is a box spanner-like key having an outer diameter that fits loosely into the opening 9e; and one end having a shape corresponding to the engaging piece 9n. An engagement hole 10a is provided which has a shape and loosely fits into the engagement piece 9n.

That is, the outer cylinder 9b is fixed to the door 2, and the outer cylinder 9b is fixed to the door 2.
An intermediate portion of the shaft 9i is pivotally supported by the shaft 9i, and an engagement piece 9n is fixed to the inner end surface of the opening 9e of the shaft 9i. Further, an actuating piece 9a is fixed to an end portion of the shaft 9i on the outside of the outer cylinder 9b. Then, the lid piece 9p is loosely fitted into the opening 9e, loosely fitted onto the shaft 9i, pressed by the push spring 9r, and brought into contact with the back surface of the engagement piece 9n to be held at a predetermined position on the open end side of the opening 9e. Ru. With such a configuration, the gap between the opening 9e and the engaging piece 9n is the same as the lid piece 9p.
This prevents the unlocking device 9 from being unnecessarily manipulated by a mischievous person. In addition, since the lid piece 9p is engaged with the engaging piece 9n, it is held in a predetermined position, so the outer diameter of the outer cylinder 9b can be reduced, making it small and inconspicuous without spoiling the aesthetics. A locking device is obtained. When unlocking the lock device 7, insert the key 10 into the opening 9e, push the cover piece 9p through the edge of the engagement hole 10a, fit the engagement piece 9n into the engagement hole 10a, and then open the key 10. By rotating, the arm 6 is operated through the displacement of the operating piece 9a, and the locking device 7 is unlocked.

As explained above, the present invention has an outer cylinder which is fixed to a door and has a bottomed opening on the surface of the door, and the intermediate part of the shaft is pivotally connected to the outer cylinder. The mating piece is fixed, and the center part is loosely fitted to the opening, and the center part is loosely fitted to the shaft, and is pressed toward the opening end of the opening and comes into contact with the engaging piece and is held in a predetermined position in the outer cylinder. It is equipped with a lid piece. As a result, the gap between the opening and the engagement piece is closed by the cover piece, preventing unnecessary operations caused by mischief, and the cover piece is also engaged with the back surface of the engagement piece to hold it in place. Therefore, the outer diameter of the outer cylinder can be made small, and an unlocking device for an elevator landing that is small, inconspicuous, and does not spoil the aesthetic appearance is realized.

[Brief explanation of the drawing]

Fig. 1 is an elevational view conceptually showing the back side of the elevator landing device, Fig. 2 is an elevational view of the front side of Fig. 1, and Fig. 3 is an embodiment of the elevator landing unlocking device according to this invention. 2 is an enlarged view of the part shown in FIG. 2, FIG. 4 is a sectional view taken along the - line in FIG. 3, FIG. 5 is a front view of the key of the unlocking device in FIG. 4, and FIG. 6 is a right side view of FIG. It is. 2...Door, 7...Lock device, 9...Unlock device, 9
a... Actuation piece, 9b... Outer cylinder, 9e... Opening,
9f...bottom surface, 9i...shaft, 9n...engaging piece, 9
p...lid piece, 9g...recess, 9r...pressing spring,
Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Scope of utility model registration request] A door installed in an elevator landing and having a locking device that prevents the door from being opened by operation from the landing side when fully closed, and having a bottomed opening fixed to the door and opening on the front side of the door. The outer cylinder has a rod shape, one end of which is disposed within the opening, the middle part of which is pivotally supported on the bottom of the opening, the longitudinal end of which is held in a predetermined position, and the other end of which is provided with an actuating piece for unlocking the locking device. a fixed shaft; an irregularly shaped engagement piece fixed to the inner end surface of the opening of the shaft and having an outer diameter larger than the diameter of the shaft; A lid piece that is fitted and has a recess corresponding to the engaging piece on its surface and that the engaging piece is loosely fitted into the recess, and a lid piece that has one end on the bottom surface of the opening and the other end as the lid piece. An elevator hall unlocking device comprising a push spring facing the back side of the elevator hall.