JPH0266094A - Safety device for door - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a door safety device for a door that is installed in an elevator or the like and is driven to open and close by an electric motor.

<Prior Art> Conventionally, in order to ensure the safety of passengers in doors that are driven to open and close by electric motors, door safety devices have been installed on elevator doors, etc., as shown in Japanese Patent Application Laid-open No. 60-6580, for example. is proposed.

7 and 8 are views showing this type of conventional door safety device, with FIG. 7 being a front view showing the overall structure, and FIG. 8 being an enlarged vertical view showing the main structure.

In FIG. 7 showing the overall configuration of these, 1 is a door that is driven to open and close by an electric motor (not shown), such as an elevator door, 2 is an operating piece that is movably protruded from the door 1, and 3 is a door. The upper seat 4 is attached to the upper part of the door 1, the lower seat 4 is attached to the lower part of the door 1, and 5.5a has one end attached to the lower seat 4 and the upper seat 3, and is rotatable along the door 1. The lever 6 is a switch that issues a command signal in response to the rotation of the lever 5, the signal line 7 is connected to the switch 6 and the electric motor that opens and closes the door 1, and the signal line 8.8a is connected to the other end of the lever 5.5a, respectively. A connecting body is rotatably attached along the door 1, 9 is a detection switch that issues a command signal to the electric motor via a signal line 7a in response to the rotation of the operating piece 2, and 10 is a predetermined position from the rotated position. That is, it is a return device that applies a return force to the operating piece 2 to its original position.

In addition, in FIG. 8 showing the lower connecting body 8 portion, 11
is a support part that is provided at one end of the connecting body 8 and supports the actuating piece 2 rotatably in a horizontal plane, and has shafts 11a and l at the upper and lower parts.
It has lb. Reference numeral 12 denotes a pair of engaging bodies that are provided on the actuating piece 2 and that engage with the support portion 11, and are connected to the shafts 11a and 11, respectively.
It has holes 12a and 12b into which the lb is inserted. Note that the upper connecting body 8a has a similar configuration, with the support portion 13 supporting the actuating piece 2.

In this conventional door safety device, the electric motor closes the door 1 to the right in FIG. 7 after a predetermined period of time after the car (not shown) lands on the floor and the door 1 opens. At this time, the actuating piece 2 comes into contact with the passenger or the baggage, and the actuating piece 2 touches the arrow 14 in FIG.
When an external force is applied in the direction shown, the actuating pieces 2 are pushed in, the levers 5.5a rotate, and the switch 6 is activated. Then, the command signal from this switch 6 is transmitted to the signal line 7.
The electric motor is reversed and the door 1 which was in the process of closing is opened. Thereafter, when the external force from passengers and luggage is removed, the actuating piece 2 returns to its original position protruding from the door 1 by elastic return force.

Similarly, when an external force in the horizontal direction perpendicular to the moving direction of the door 1 is applied to the actuating piece 2, the actuating piece 2 moves to the shafts 11a, l.
It rotates around lb, etc., and the detection switch 9 is activated. Then, a command signal from the detection switch 9 is issued via the signal line 7a, the motor is reversed, and the door 1, which was in the process of closing, is opened. Thereafter, when the above-mentioned external force is removed, the actuating piece 2 returns to its original position because the returning force of the return bag W10 is applied thereto.

In the conventional door safety device configured in this way, if there is a passenger or baggage at the tip of the door 1 while the door 1 is being closed,
Since these are detected and the door 1 is opened, it is possible to prevent the user or luggage from getting caught.

<Problems to be Solved by the Invention> Incidentally, the conventional door safety device described above has a structure in which the operating piece 2 is supported at one end of each of the connecting bodies 8.8a, that is, the supporting portions 11. 13 is the connecting body 8.
8a, and there is a problem that a force or bending stress is applied to the shafts 11a, 11b of the support portion 11 and the shafts (not shown) of the support portion 13 in an eccentric direction.

In addition, a reaction force by the return device 10 that applies a return force to the actuating piece 2 is applied to the shafts 11a and llb of the support portion 11 via the connecting body 8.
Since the shafts 11a and llb are inserted into the holes 12a and 12b, uneven wear and the engagement portion 12 are likely to be misaligned. As a result, the return force of the return device 10 decreases, causing the actuating piece 2 to no longer return to its original position from the rotating position, or the door 1 not closing because the detection switch 9 does not return to its stopped state. was there.

In addition, there is a concern that the relative positional relationship between the detection switch 9 and the return device 10 and the center of rotation of the actuating piece 2 may shift due to vibrations during the reversing operation of the door 1 or shocks when a passenger or luggage collides with each other. However, in this case as well, the problem that the door 1 does not close occurs as described above.

The present invention has been made in view of the actual situation in the prior art, and its purpose is to prevent the application of force or bending stress in the direction of eccentricity of the axis to the support part, and
To provide a door safety device that can reliably operate a return device and a detection switch.

<Means for Solving the Problems> In order to achieve this object, the present invention includes a plurality of levers each having one end attached to a door that is driven to open and close by an electric motor and rotatable along the door; a connecting body rotatably attached to the other end of the lever; an actuating piece disposed near these connecting bodies and movably protruding from the door; a support portion that rotatably supports the actuation piece in a horizontal plane; an engagement portion that is provided on the actuation piece and engages with the support portion; and a command signal to the electric motor in response to rotation of the actuation piece. In the door safety device, the door safety device includes a detection switch that generates a signal, and a return device that applies a return force to the actuating piece from a rotational position to a predetermined position, wherein the support portion is disposed across the engagement portion, and An operating body for operating the return device and the detection switch is held in the engagement portion.

<Function> Since the present invention is configured as described above, the actuating piece is supported at both ends of each connecting part via the supporting parts arranged on both sides of the engaging part of the actuating piece, and the return device is supported. The main body and the operating body of the detection switch are held in the engaging portion and are always held at a constant position with respect to the rotation center of the actuating piece. Bending stress can be prevented from being applied, and the return device and the detection switch can be operated reliably.

<Example> Hereinafter, the door safety device of the present invention will be explained based on the drawings.

Here, FIGS. 1 to 6 are diagrams showing one embodiment of the door safety device of the present invention, with FIG. 1 being a front view showing the overall configuration, and FIG. 2 being an enlarged vertical sectional view showing the main part configuration. , FIG. 3 is a cross-sectional view showing the structure of the support part of the connecting body provided in the embodiment,
FIG. 4 is a cross-sectional view showing the installed state of the return device provided in the embodiment, FIG. 5 is a cross-sectional view showing the installed state of the detection switch provided in the embodiment, and FIG. FIG. 2 is an explanatory diagram showing the configuration of the return device shown in the figure. Figure 3 is a cross-sectional view taken along line A-A in Figure 2, and Figure 4 is B-B in Figure 2.
FIG. 5 is a cross-sectional view taken along line CC in FIG. 2. Further, in FIGS. 1 to 6, parts equivalent to those shown in FIGS. 7 and 8 described above are given the same reference numerals.

First, in FIG. 1 showing the overall configuration of the embodiment, 30.
31 are each formed in a U-shape, and the lower part is the lever 5a.
, 5, and 9a is a detection switch which is provided at the connection body 31 portion as will be described later in FIG. , 10a are return devices provided at respective parts of the connecting body 30, 31, as will be described later in FIGS. 4 and 6, for applying a return force to the operating piece 2 from the rotational position to the original position.

Next, in FIG. 2 showing the configuration of the lower connecting body 31, 32 and 33 are provided on the connecting body 31 and support parts 32a and 33a are provided to support the actuating piece 2 so as to be rotatable in a horizontal plane. Shafts 34 formed in the direction toward which these support parts 32 and 33 approach each other are provided on the opposite side of the protruding direction of the actuating piece 2, and are an engaging part arranged to be sandwiched between the support parts 32 and 33. , 34a, 34b are holes formed at the upper and lower ends of this engaging portion 34, into which the shafts 32a, 33a are inserted, respectively.
have their axes aligned with the same vertical line. In FIG. 3 showing the support portion 33, a is the axis of the shaft 33a, etc. mentioned above. In addition, the upper connecting body 3
The 0 portion also has a similar configuration. As a result, the actuating pieces 2 are each supported at both ends of the connecting body 30, 31, and are rotatably supported in a horizontal plane.

Further, in FIG. 4 showing the state in which the return device 10a is installed, 41 is a plate that is attached with one side sandwiched between the connecting bodies 31, and 41a is a circular arc-shaped holder that is formed on the other side of the plate 41. 42 is a rolling element that transfers on this transfer surface 41a, 43 is a rod that has the rolling element 42 at one end and whose other end is inserted into the actuating piece 2, and 44 is provided in the middle part of the engaging part 34. 45 is a holder fixed to the inside of the actuating piece 2, 46 is a spring seat fixed to the middle part of the rod 43, and 47 is a holder for these. The spring is installed between the tool 45 and the spring seat 46 and applies the spring force P shown in FIG.
The main body of the return device 10a is held by the engaging body 34 via the engagement body 34. Note that the return device 10a provided in the upper connecting body 30 portion is similarly configured.

In FIG. 6, which describes the configuration of the return device 10a, when the actuating piece 2 is in the original position as shown in FIG.
, R is the distance dimension between the center of the rolling element 42 and the axis a, R is the arc diameter of the transfer surface 41a, and this arc diameter R is set smaller than the distance dimension. Further, when the actuating piece 2, rod 43, etc. rotate to the state shown in FIG. 6, the rolling elements 42 move on the transfer surface 41a, and
The rod 43 whose arc diameter R is smaller than the distance dimension is pushed in, and the spring 47 is compressed via the spring seat 46. Along with this, a spring force P is applied in the axial direction of the rod 43, and as this spring force P, the rolling element 42 presses the plate 41 at the contact point between the rolling element 42 and the rolling surface 41a. It is configured so that a component of the force F2 that rotates the rod 43 about the center a can be obtained.

Furthermore, in FIG. 5 showing the state in which the detection switch 9a is installed, 48 is a movable actuator provided protrudingly from the detection switch 9a, and 49 is attached to the engaging portion 34, and the actuator 48 can be operated to contact. body,
49a is a top portion that presses the actuator 48 when the operating piece 2 is in its original position, and 49b are side portions formed on both sides of this top portion 49a. Note that the detection switch 9a is attached to be sandwiched between the connecting bodies 31.

In this embodiment, the connecting body 30.
31 supports the actuating piece 2 at both ends thereof. Further, the main body consisting of the rod 43 and the like of the return device 10a and the operating body 49 of the detection switch 9a are held by the engaging portion 34 and held at a constant position with respect to the axis a.

When the door 1 closes, the operating piece 2 is moved by the passenger or the luggage.
When a horizontal external force perpendicular to the door 1 is applied to the door 1, the axis a of the shafts 32a, 33a and the holes 34a, 34b
The actuating piece 2 rotates in a horizontal plane from the original position shown in FIGS. 3 to 5 about the center. At this time, the operating body 49 in FIG.
The top portion 49a rotates together with the engaging portion 34, and the top portion 49a separates from the actuator 48, causing the actuator 48 to move to the right in FIG. Along with this, the detection switch 9a
A command signal is issued from the motor through the signal line 7a, the motor is reversed, and the door 1 is opened. On the other hand, the return device 10a in FIG.
Now, as described above with reference to FIG. 6, a force F2 is obtained that causes the rod 43 to rotate about the axis a, and this force F2 is applied to the actuating piece 2 as a return force. Thereafter, when the external force from passengers and luggage is removed, the actuating piece 2 is returned to its original position by the restoring force of the restoring device 10a, and the top 49a of the operating body 49 moves the actuator 48 to the state shown in FIG. When pressed, the detection switch 9a stops operating.

In the embodiment constructed in this way, since the actuating piece 2 is supported by the respective supports 32.33 of the coupling body 30.31, that is, by the respective ends of the coupling body 30.31, the shafts 32a, 33a are It is possible to prevent the application of force or bending stress in the direction of eccentricity. In addition, the main body of the return device 10a and the detection switch 9a may be damaged due to vibration or collision.
The operating body 49 can be prevented from shifting in position relative to the axis a, and thereby the return device 10a and the detection switch 9a can be operated reliably.

<Effects of the Invention> Since the present invention is configured as described above, it is possible to prevent force or bending stress from being applied to the support portion provided in the connecting body in the direction of eccentrically centering the axis, and to prevent the return device and the detection switch from being applied. It can operate reliably, thus eliminating uneven wear and misalignment of the engaging part that engages with the support part, preventing the actuating piece from returning to its original position and the door from not closing, and preventing these failures. This has the effect of improving the reliability of, etc.

[Brief explanation of the drawing]

Figures 1 to 6 are views showing one embodiment of the door safety device of the present invention, Figure 1 is a front view showing the overall configuration, Figure 2 is a vertical sectional view showing the main part configuration, and Figure 3 is a FIG. 4 is a cross-sectional view showing the configuration of the support part of the connecting body provided in the embodiment; FIG. 4 is a transverse sectional view showing the installed state of the return device provided in the embodiment; FIG. 6 is an explanatory diagram showing the configuration of the return device shown in FIG. 4, and FIGS. 7 and 8 are diagrams showing the conventional door safety device. The figure is a front view showing the overall structure, and FIG. 8 is an enlarged longitudinal sectional view showing the main part structure. 1... Door, 2... Operating piece, 5.5a.
...Lever 9a...Detection switch, 10
a... Returning device, 30.31... Connecting body, 32.33... Supporting part, 32a, 33a.
...Shaft, 34...Engagement part, 34a, 34
b...Hole, 41...Bake is plate, 42...
...Rolling element, 43...Rod, 45...
...Holder, 46... Spring seat, 47...
...Spring, 49... Operation body. Figure 2 Figure 3 Figure 4 Figure 6 Figure 7!

Claims (1)

[Claims] (1) A plurality of levers each having one end attached to a door that is driven to open and close by an electric motor and that can rotate along the door;
A connecting body rotatably attached to the other end of each of these levers, an operating piece disposed near these connecting bodies and movably protruding from said door, and provided on said connecting body. , a support part that rotatably supports the actuation piece in a horizontal plane; an engaging part provided on the actuation piece and engaged with the support part; and a command to the electric motor according to rotation of the actuation piece. In the door safety device having a detection switch that emits a signal and a return device that applies a return force to the actuating piece from a rotational position to a predetermined position, the support part is arranged to sandwich the engagement part. The door safety device is further characterized in that a main body of the return device and an operating body for operating the detection switch are held in the engagement portion.