JPH0479950B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an elevator door safety device, and more particularly to an elevator door safety device that improves the way the connection cable of an obstacle detection switch is routed.

[Conventional technology]

FIG. 4 is a front view showing a conventional elevator door safety device, and FIG. 5 is a front view showing details of the lower link of the safety shoe.

In the figure, 1 is a car door, 2 is a safety switch, 3 is a lower link, 4 is an upper link, and 5 is an obstacle detection switch, for example, a micro switch is used. Rails 6 and 7 are fixed to the girders 6 and 8 are rollers, and the car door 1 is suspended from the rails 7 by the rollers 8 so as to be freely movable. 9 is a bearing fixed to the beam 6, 10 is an arm whose one end is supported by the bearing 9, 11 is a chain, 12 is a connection cable for the micro switch 5, and 13 is a cable support that fixes the cable 12 to the car door 1 in the middle. 14 is a window of the car door 1; 15 is a sill; 16 is a movable vane, which is fixed to the car door 1;
In between, engage the rollers of the platform door (not shown),
This is for opening and closing the car door 1 and the platform door at the same time.

The link 3a of the lower link 3 is rotatably supported by a support shaft 3c with respect to a support 3b fixed to the car door 1, and the safety shoe 2 is rotatably supported with respect to the link 3a by a support shaft 3c. ing.
Further, the link 4a of the upper link 4 is rotatably supported by a support shaft 4c with respect to a support 4b fixed to the car door 1, and the safety shoe 2 is rotatably supported by a support 4b fixed to the car door 1.
A is rotatably supported by a support shaft 4c. That is, link 3a and link 4a constitute parallel links. 3d and 4d are stoppers,
The amount of protrusion of the safety shoe 2 in the X direction is regulated. Reference numeral 4e denotes a spring, and a force in the X direction is always applied to the safety shoe 2 by the spring 4e.

In the above configuration, when a person comes into contact with the safety shoe 2 or a load hits the safety shoe 2, an external force P acts, and the links 3a and 4a move in the direction A against the force of the spring 4e and the own weight of the safety shoe 2. The link 3a and the stopper 3d, the link 4a and the stopper 4d, and the link 3a and the micro switch 5
The lever 5a is separated, the switch 5 is operated, and the car door 1, which was about to close, is opened in the opposite direction, and is in the open state.

[Problem that the invention seeks to solve]

By the way, the cable 1 is connected to the micro switch 5 of the door safety device which operates the micro switch 5 when an obstacle such as a person or baggage comes in contact with the safety switch 2 and an external force is applied to detect the obstacle.
2, the arm 10 is supported on the bearing 9 provided on the girder 6 and wired via the chain 11 as shown in FIG. As a result, the chain 11 makes noise when the door is opened and closed, and the arm 10 interferes with the car door 1, causing noise.If the door has a window, the chain 11 can be seen through the window 14, and the design is poor. There was a problem. Furthermore, there is a problem in that the cable wiring guide is subject to restrictions on the width and height of the entrance of the car door 1, so there are many types and the manufacturing cost is high.

This invention was made to solve these problems; it does not generate noise, and even in the case of a door with a window, chains and cables are not visible through the window.
To provide an elevator door safety device in which the number of types of cable wiring guides does not increase due to changes in the width and height of the door entrance.

[Means for solving problems]

In the elevator door safety device according to the present invention, the connection cable of the obstacle detection switch is wired using a link mechanism provided between the lower part of the car door and the lower part of the car as a cable wiring guide.

[Effect]

In this invention, since the connection cable of the obstacle detection switch is connected to the link mechanism provided between the lower part of the car door and the lower part of the car, noise due to interference from the chain or arm is not generated, and the door with window is connected to the connecting cable. In some cases, cables and chains cannot be seen from the window. Furthermore, the link mechanism, ie, the cable routing guide, does not need to be dimensioned differently depending on the width and height of the car door entrance.

〔Example〕

FIG. 1 is a front view showing an embodiment of the present invention. In FIG. 1, the same parts as in FIGS. 4 and 5 are designated by the same reference numerals, and 20 is a link mechanism provided at the bottom of the car door 1, which serves as a cable wiring guide. The link mechanism 20 consists of a link 20a and a link 20b that are rotatably connected, and the other end of the link 20a is rotatably supported by the car door 1 via a support 20c fixed to the lower part of the car door 1. ing.

The other end of the link 20b is rotatably supported at the bottom of the car by a support 20d fixed to the sill 15.

In this embodiment, after the cable 12 is fixed to the girder 6, it is lowered and fixed to the support 20d of the link 20b, and then wired to the switch 5 along the links 20b and 20a. That is, the link mechanism 20 is wired as a cable wiring guide. Note that 12a is a cable clamp.

FIG. 2 is a front view showing another embodiment of the invention. In FIG. 2, the difference from the previous embodiment is that a support 20e whose both ends are fixed to the girder 6 and the sill 15 is provided instead of the support 20d, and a link 20b is provided.
The end portion of the support column 20e is rotatably supported at the bottom of the support column 20e. The other parts are the same as in the previous embodiment.

In the above two embodiments, the cable 12 is connected to a link mechanism 20 provided between the lower part of the door 1 and the lower part of the car.
Since the wires are wired according to the door, the chain and arm do not interfere with the door like in conventional devices. Therefore, no noise is generated. Furthermore, in the case of a door with a window, the link mechanism 20 is located below the window, so that cables and chains are not visible through the window and do not impair the design.

Next, it will be explained with reference to FIG. 3 that the types of link mechanisms do not increase depending on the width and height of the entrance/exit of the door 1. In Figure 3, B is the width of the doorway of door 1, provided that it is the width of one door on each side, C is the height of the doorway of door 1, D is the dimension from the threshold 15 of switch 5, and E
is the dimension of the cable support 13 from the threshold 15, F
is the dimension between the bearing 9 and the cable support 13, and G is the dimension between the bearing 9 and the center of the door entrance.

Note that even if the width B and the height C change, the dimensions D and E remain constant from the threshold 15. θ is the angle formed by the link 20a and the link 20b when the door 1 is in a closed state.

As can be seen from FIG. 3, in the present invention, the link mechanism 20 is provided between the car door 1 and the lower part of the car, so there is no need to change the dimensions even if the height C changes. Furthermore, even if the width B changes, for example, for a practical width of 800 to 1100 mm, it is possible to determine the dimensions of the links 20a and 20b so that the dimensions of the link mechanism 20 do not need to be changed just by changing the angle θ. can. In other words, even if the width B and height C of the entrance/exit of the door 1 change, only one type of link mechanism 20 is required.

In contrast, in the conventional device, when the width B of the entrance of the door 1 changes, the dimension G changes, and when the height C changes, the dimension F changes. Therefore, it is necessary to change the dimensions of the arm 10 and chain 11 as the width B and height C change. In other words, due to restrictions on the width B and height C of the entrance/exit of the door 1, there are many types of cable wiring guides, and the manufacturing cost becomes high.

In addition, although the above embodiment described a door safety device that detects obstacles by contact using a safety system, it is also possible to wire cables for a door safety device that uses a floodlight and a photoelectric conversion device to detect obstacles non-contact. Even if implemented, the same effect will be achieved.

〔Effect of the invention〕

As explained above, in this invention, the connection cable of the obstacle detection switch is connected to the link mechanism provided between the lower part of the car door and the lower part of the car, so there is no noise caused by interference from the chain or arm, and the connection cable is connected to the obstacle detection switch. Even with attached doors, cables and chains cannot be seen through the window. Furthermore, it is possible to standardize the cable wiring guide even if the width and height of the car door entrance vary.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of this invention, FIG. 2 is a front view showing another embodiment of this invention, and FIG. 3 is a front view showing another embodiment of this invention.
Figure 4 is an explanatory diagram comparing the present invention and a conventional device, Figure 4 is a front view showing a conventional elevator door safety device, and Figure 5 is a front view showing details of the lower link of the safety system. be. In the figure, 1 is the car door, 2 is the safety shoe, 3 is the lower link of the safety shoe, 4 is the upper link of the safety shoe, 5 is the obstacle detection switch, 12 is the cable, and 20 is the link mechanism. . Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. In an elevator door safety device that detects the presence of an obstacle when the elevator door closes, with or without contact, using an obstacle detection switch installed on the car door, and switches the closing operation to the opening operation, the above-mentioned obstacle detection An elevator door safety device characterized in that a connection cable for an elevator switch is routed along a link mechanism provided between the lower part of a car door and the lower part of the car.