JPS592064Y2 - Elevator door locking device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an elevator door locking device.

First, a conventional door locking device will be explained with reference to FIGS. 1 to 3.

In the figure, 1 is the entrance/exit of the elevator, 2 is a sliding door that opens and closes this, 3 is a hanger case fixed to the upper edge of the entrance/exit 1, and 4 is an engaging body attached to this, which is connected to a slope 4a and abutting body. Surface 4b is provided.

5 is a hook-shaped engagement piece whose off-center part is pivotally attached to the sliding door 2;
5a is a well-known transmission device having a retaining surface wider than the abutting surface 4b formed at one end thereof, and 6 a rod 6a connected to the other end of the engaging piece 5. The roller 6b is shown in FIG. When the rod 6a is pressed to the right, the rod 6a is displaced downward.

That is, when the roller 6b is pressed, the engaging piece 5 rotates clockwise in FIG. 1 with the intervention of the rod 6a.

As a result, the retaining piece 5 separates from the engaging body 4 and the sliding door 2 is opened to the right.

When the sliding door 2 is closed, the engaging piece 5 rides up on the slope 4a and then falls due to the sun pattern, so that the retaining surface 5a faces the contact surface 4b and the sliding door 2 is locked.

However, if the longitudinal lengths of the engaging body 4 and the engaging piece 5 are not arranged along the same straight line due to manufacturing errors or installation errors, the end ridgeline of the abutment surface 4b will engage as shown in FIG. It comes into contact with the surface 5a.

At this time, the contact surface pressure between the abutment surface 4b and the engagement surface 5a increases, so the detachment movement of the retaining piece 5 is inhibited, and the sliding door 2
is no longer unlocked, and the elevator car (not shown)
Problems such as passengers becoming trapped may occur.

This invention solves the above-mentioned drawbacks and aims to provide an elevator door locking device in which the detachment operation of the retaining piece is not hindered.

An embodiment of this invention will be described below with reference to FIG.

In the figure, the same reference numerals as in FIGS. 1 to 3 indicate the same parts, and 7 is a protruding curved surface provided on the contact surface 4b and arranged along the displacement direction of the engagement surface 5a. A protruding curve is formed in the cross section.

That is, when the locking piece 5 is in the locking position, the locking surface 5
Since a faces the protruding curved surface 7, even if the lengths of the engaging body 4 and the engaging piece 5 are not arranged along the same straight line,
Both the retaining surface 5a and the contact surface 4b are in contact over a relatively wide area.

Therefore, the contact surface pressure between the two is reduced, and the unlocking operation of the retaining piece 5 is not inhibited, thereby making it possible to prevent problems caused by the inability to unlock.

It should be noted that it is easy to apply this embodiment to arrange the retaining piece 5 on the banger case 3 and the engaging body 4 on the sliding door 2, and it is obvious that the same effect can be obtained even in this case. It is.

As explained above, in this invention, an engaging body is fixed to the edge of the doorway, a retaining piece is displaceably attached to the sliding door, and this retaining piece is displaced when necessary to engage with the engaging body, and is attached to the sliding door. An abutting surface is provided on one of the engaging body and the retaining piece for a device that is disengaged from the engaging body through the operation of a member of the transmission device that is provided and is pushed and displaced in the door opening direction. The other is provided with an engaging surface wider than the abutting surface, and the abutting surface is provided with a protruding curved surface to reduce the contact surface pressure between this and the retaining surface.

This facilitates the disengagement operation of the engaging body and the retaining piece, thereby realizing an elevator door locking device that prevents accidents due to inability to unlock.

[Brief explanation of the drawing]

Figure 1 is a front view of an elevator door device showing a conventional elevator door locking device, and Figure 2 is II-I of Figure 1.
3 is a sectional view taken along the line 1ll--III of FIG. 1, and FIG. 4 is a view corresponding to FIG. 3 showing an embodiment of the elevator door locking device according to this invention. 1... Entrance/exit, 2... Sliding door, 4...
...Engaging body, 4b...Abutting surface, 5...
...Engagement piece, 5a...Engagement surface, 7...
Protruding curved surface. In addition, the same parts or corresponding parts in the figures are indicated by the same reference numerals.

Claims (1)

[Scope of utility model registration request] An engaging body is fixed to the edge of the doorway, and a movable retaining piece is attached to the sliding door that opens and closes the doorway, and this retaining piece is displaced when necessary to engage the engaging body and close the sliding door. A contact provided on one of the engaging body and the engaging piece, in which the sliding door operates through the movement of a member that is displaced by being pressed in the door-opening direction of the sliding door and detaches from the engaging body. a retaining surface provided on the other of the two and having a dimension perpendicular to the displacement direction of the retaining piece larger than that of the abutting surface; An elevator door locking device characterized in that a protruding curved surface is provided in which a protruding curve is formed in a cross section along the displacement direction of the piece and orthogonal to the displacement direction of the bracket.