JPS5849341Y2 - Elevator door safety device - Google Patents

Description

[Detailed description of the invention] This invention relates to an elevator door safety device.

First, 1. The elevator door safety device will be explained with reference to FIG.

In the figure, 1 is the entrance/exit of the elevator, 2 is the sliding door that opens and closes this, 3 is the drive mechanism that drives the sliding door 2 to open and close, and 3a
4 is a part of the drive mechanism 3; however, 1 is a first member pivoted near the drive 3a and a frame 4a is formed on the other side; 4b is a member inside the frame 4a; a retaining shaft 5 provided at
6 is a second member which is a part of the drive mechanism 3 and whose one side is pivoted near the sliding door 2, is loosely inserted into the frame 4a, and whose free end is loosely fitted to the engagement shaft 4b; 6 is provided on the second member 5; A door-opening side slope 6a and a door-closing side slope 6b are formed in the V-shaped recess.

Reference numeral 1 denotes a suppressing device provided on the first member 4, protruding into the frame portion 4a and disposed opposite to the recess 6, 7a is a retainer screwed into the frame portion 4a, and γb is a base with a roller at its tip. 7 is a pusher inserted into the retainer γa; 1c is a compression coil spring that urges the pusher γb in the direction of the recess 6;
d is a locking nut screwed into the retainer 1a, and 8 is a detection device consisting of a switch whose operating portion is brought into contact with the upper end of the base of the presser 7b.

That is, the sliding door 2 is opened and closed by the drive mechanism 3.

At this time, when the sliding door 2 is opened, the first and second members 4, 5
A tensile force acts on the sliding door 2, and a compressive force acts on the sliding door 2 when the door is closed.

Regarding these tensile and compressive forces, the first . The recess 6 is pressed by the pressing device T so that the second members 4 and 5 are not displaced relative to each other. The second members 4, 5 are held in a predetermined relative position.

If an abnormal load is applied to the sliding door 2, such as when a passenger gets their hand caught between the opening sliding door 2 and the edge of the entrance/exit 1, or when the closing door 2 collides with the passenger, the suppression device 7 1st against the way of holding. The second members 4 and 5 are relatively displaced.

In this state, the pusher γ rides on one of the slopes 6a and 6b and is displaced, so the detection device 8 operates.

Through this operation, the driving machine 3a is controlled in abnormal situations such as stopping and reversing operation.

However, the abnormal load value at which the detection device 8 operates, that is, the holding force of the pressing device γ, can be adjusted by changing the amount of compression of the biasing body 7c via the retainer 7a, but when the door is opened,
There was a problem in that the abnormal load value of the detection device 8 could not be adjusted for each time the door was closed.

For example, when the sliding door 2 is opened, if the button is pressed to open the door normally and the detection device 8 malfunctions due to a change in sliding resistance, if the holding force of the pressing device 1 is increased, the abnormal load value of the detection device 8 when the door is closed is becomes larger, compromising safety when closing the door.

This invention solves the above-mentioned drawbacks and aims to provide an elevator door safety device that can adjust the abnormal load values on the door opening side and the door closing side of the detection device.

Below, 3rd. An embodiment of this invention will be explained with reference to FIG.

In the figure, 1st. The same reference numerals as in FIG. 2 indicate corresponding parts, and 6a is arranged on one side of the slope of the recess 6 and consists of the upper surface of the cam 9 that protrudes beyond this, and 9a is provided on the cam 9 and is located on the side of the door opening side. 6b is a door-closing side slope formed from the top surface of a cam 10 arranged in the same way as cam 9 on the other side of the slope of recess 6; 10a is a long hole with its longitudinal end arranged in a direction perpendicular to the top surface; 10a is a long hole 9;
Similarly to a, the elongated hole provided in the cam 10, 11 is the elongated hole 9
This is a bolt that is inserted into the atloa and screwed into the second member 5.

That is, the door opening/closing side slopes 6at6b are provided to protrude from the slopes of the recess 6, and the bolts 11 and elongated holes 9
a, 10a through the respective inclination angles θ shown in FIG.
1. θ2 can be changed.

For this reason, the holding force of the pressing device 1 is set to θ1 for the door opening side.
Also, the door closing side can be adjusted by changing θ2.

Therefore, the abnormal load value at which the detection device 8 operates is detected by the bow door 2.
It is possible to set load values for each of the opening and closing of the door that will not cause malfunctions and will operate accurately in the event of an abnormality.

In addition, in this embodiment, even if one of the cams 9 and 10 is eliminated and the bottom surface of the sloping recess 6 formed from the top surface of this cam is used, one side of the sliding door 2 when the door is opened and when the door is closed. Only the abnormal load value can be adjusted.

Even if you do this, the third problem. Almost the same effect as the embodiment shown in FIG. 4 can be obtained.

As explained above, this invention is such that one of the first member and the second member is provided with a pressing device, the other is provided with a V-shaped recess that is pressed by the pressing device, and the first member and the second member are provided with a V-shaped recess that is pressed by the pressing device. A cam whose inclination angle can be changed is provided on at least one side of the V-shape of the recess to prevent relative displacement of the second member, so that the detection device can be used when the sliding door is opened or closed. The operating load value can be adjusted.

This achieves a highly reliable elevator door safety device that does not malfunction at least when the sliding door is opened or closed, and that operates accurately in the event of an abnormality.

[Brief explanation of the drawing]

FIG. 1 is a top view showing the Everta door safety device, and FIG. 2 is an enlarged view of the section ``■'' in FIG. 1 with a portion cut away. FIG. 3 is a view corresponding to FIG. 2 showing an embodiment of the elevator door safety device according to this invention, and FIG. 4 is an enlarged view of the part 2 in FIG. 3. 2... Sliding door, 3... Drive mechanism, 4... First member, 5... Second member, 6... Recess, 6at6b...
Slope, 1... Pressing device, 8... Detecting device, 9, 10
···cam. Identical or equivalent parts in the figures are indicated by the same reference numerals.

Claims (1)

[Scope of utility model registration request] A drive mechanism that drives the sliding door to open and close; a first member and a second member that form part of the drive mechanism and engage each other so as to be relatively displaceable; and a recess provided in one of the first and second members. is held by the other of the two and is biased toward the V-shaped recess to normally maintain the two in a predetermined relative position, and to open and close the sliding door. a pressing device that rides on one side of the slope and is displaced by relative displacement between the two when an abnormal load is applied along the direction; a detection device that operates according to the displacement of the pressing device; and a V-shaped portion of the slope. An elevator door safety device comprising a cam disposed on at least one side, protruding from the cam, facing the pressing device, and movably fastened to a member forming the slope.