JPH07101653A - Safety device of elevator door - Google Patents

Abstract

PURPOSE:To prevent a parallel arm from breaking due to collision of a carrier or the like against a safety shoe, by providing a flexible and elastic material in the middle of a parallel arm, in an attached condition of the safety shoe through the parallel arm, so as to project from the edge of elevator door. CONSTITUTION:A connector insertion groove 11a and two bolt holes 11b are provided in the upper arm 11 connected to a safety shoe 5 and a connector insertion groove 12a and two bolt holes 12b are provided in the lower arm 12 connected to the axis 4 of an attaching plate 2. The inlaying parts 13a formed at both ends of the arm connector 13 as a flexible and elastic material are inserted in the respective connector insertion grooves 11a, 12a to connect the upper and lower arms 11, 12. In this parallel arm, when a side force acts theron, the arms are rotated until a specified value but if the force exceeds the value, the arm connector 13 is bent as bow-shaped and the force acting on the upper arm is absorbed and hence, the parallel arm can be prevented from breaking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door safety device for preventing passengers, luggage and the like from being caught in a door when the door is closed.

[0002]

2. Description of the Related Art Conventionally, as a safety device of this type, for example, Japanese Utility Model Publication No. 63-41415 and Japanese Utility Model Publication No. 55-500.
Those disclosed in Japanese Patent No. 23, Japanese Utility Model Publication No. 63-123573, etc. are known.

FIG. 10 is a schematic front view showing an example of a conventional elevator door safety device. In the figure, 1 is a door (sliding door) that opens and closes a hall or a doorway of a car, 2 is two mounting plates fixed to the door 1 with an interval vertically provided, 3
Is a pair of two parallel arms attached to each attachment plate 2 so as to be rotatable around a shaft 4. Reference numeral 5 is a safety shoe (contact rod) attached to the tip of the parallel arm 3 by a rivet 6 so as to project from the edge of the door 1. This safety shoe 5 is accompanied by rotation of the parallel arm 3. It can be retracted to the door 1 side.

Reference numeral 7 is a switch mounted on the upper mounting plate 2 and engaged with the parallel arm 3.
The switch 7 detects the rotation of the parallel arm 3 in the clockwise direction in the figure, that is, the backward movement of the safety shoe 5, and outputs a signal for reversing the door closing operation. 8 is attached to the lower mounting plate 2, and the parallel arm 3 is rotated counterclockwise in the figure.
That is, it is a blocking tool that blocks the forward movement of the safety shoe 5 at a predetermined position.

Next, the operation will be described. When the safety shoe 5 comes into contact with a passenger, luggage, a dolly, or a sleeping car during the door closing operation of the door 1, the safety shoe 5 retracts and the parallel arm 3 pivots about the axis 4 in the clockwise direction in the figure. When the parallel arm 3 is rotated, the switch 7 is activated and an inversion command is output. As a result, the door 1 that is being closed is prevented from opening, and passengers and the like are prevented from being caught in the door 1.

[0006]

In the conventional elevator door safety device constructed as described above, for example, when there is a lot of luggage or in a hurry, during the door opening operation or door closing operation. Even if there is a baggage, a dolly or a sleeper may be forced in and out of the car. At this time, luggage, a trolley, a sleeper, or the like collides with the safety shoe 5, and as shown in FIG. 11, the external forces P ₁ and P _{2 in} a direction perpendicular to the direction P of the external force during normal operation are applied to the safety shoe 5. Will be added to 3. As described above, if an unreasonable force is applied to the safety shoe 3, the parallel arm 3 may be broken. Further, when the parallel arm 3 is broken, it is necessary to remove the entire safety device from the door 1 and reassemble and adjust it in order to replace it, which causes a problem that it takes a long time to recover.

The present invention has been made to solve the above-mentioned problems, and it is possible to prevent breakage of the parallel arm, and in the unlikely event that the parallel arm is broken, a short time is required. The purpose is to obtain an elevator door safety device that can be restored in.

[0008]

An elevator door safety device according to a first aspect of the present invention comprises a parallel arm provided with a viscoelastic body at an intermediate portion thereof.

In the elevator door safety device according to a second aspect of the present invention, the parallel arms can be divided by the attachment portion of the viscoelastic body.

[0010]

According to the present invention, the impact force applied to the parallel arms via the safety shoes is absorbed by the viscoelasticity of the viscoelastic body to prevent the parallel arms from being broken.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is an exploded perspective view showing a parallel arm of an elevator door safety device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an assembled state of the parallel arm of FIG. 1 is the same as that of FIG.
Description will be given using the same reference numerals as 0.

In the figure, reference numeral 11 denotes an upper arm connected to the safety shoe 5. The upper arm 11 is provided with a connector insertion groove 11a and two bolt holes 11b. A lower arm 12 is connected to the shaft 4 of the mounting plate 2. The lower arm 12 is provided with a connector insertion groove 12a and two bolt holes 12b.

The upper arm 1 has a fitting portion 13a formed at both ends thereof which is inserted into the coupling tool insertion grooves 11a and 12a.
It is an arm connecting tool as a viscoelastic body interposed between 1 and the lower arm 12, and the fitting portion 13a is provided with holes 13b corresponding to the bolt holes 11b and 12b, respectively. 14 is a metal sleeve inserted into each hole 13b,
15 is a bolt hole 11b, 12b and each metal sleeve 14
Is a hexagon socket head cap screw which is inserted into the upper and lower arms 11 and 12 and is screwed to the upper and lower arms 11 and 12.
5, the upper and lower arms 11 and 12 and the arm connecting tool 13 are connected and fixed.

In the parallel arm constructed as described above,
When assembling this, each hole 13b of the arm connecting tool 13
Then, the metal sleeves 14 are inserted into the respective fittings, and the fitting portions 13a are inserted into the connector insertion grooves 11a and 12a. Then, using the four hexagon socket head cap screws 15, the upper and lower arms 1
1, 12 and the arm connecting tool 13 are connected and fixed. The parallel arm thus assembled is mounted between the shaft 4 and the safety shoe 5 of each mounting plate 2 as in the conventional example shown in FIG.

Further, in the parallel arm of the first embodiment, when a force in the P direction of FIG. 11 is applied, as shown in FIG.
When the upper arm 11 is rotated to a predetermined value and more force is applied, the upper arm 11 bends inward from the arm connecting tool 13 in an arc shape and absorbs the force. For this reason, breakage of the parallel arm is prevented. Further, when a force in the P ₁ direction of FIG. 11 is applied, the parallel arm bends in an arc shape at the arm connector 13 as shown in FIG. 4, and the breakage of the parallel arm is prevented. Further, when a force in the P ₂ direction of FIG. 11 is applied, the parallel arm bends in the direction opposite to that of FIG. 4 as shown in FIG. 5, and breakage of the parallel arm is prevented.

Here, the arm connector 13 which is a viscoelastic body.
If the upper and lower arms 11 and 12 and the arm connecting tool 13 forming the parallel arm are broken by an external force that cannot be completely absorbed by the hexagon socket head bolt 1 as shown in FIG.
5 can be removed to split the parallel arms, which allows easy replacement of broken points without removing the entire device. As a result, the operation stop time of the elevator before restoration is shortened.

Example 2. Next, FIG. 7 is a perspective view showing parallel arms of an elevator door safety device according to another embodiment of the present invention. In the figure, 21 is an upper arm connected to the safety shoe 5 (FIG. 10), and 22 is a mounting plate 2.
Lower arm connected to the shaft 4 (FIG. 10) of FIG. 10 and to the upper arm 21 via the pin 23, and 24 as a viscoelastic body that covers the entire outer circumference of the connecting portions of the upper and lower arms 21 and 22. It is a connector.

In the parallel arm as described above, P ₁ in FIG.
When a directional force is applied, as shown in FIG. 8, the upper arm 21 bends in an arc shape with the pin 23 as a fulcrum, and the force is absorbed by the arm connector 24 which is a viscoelastic body. Also,
When a force in the P ₂ direction of FIG. 7 is applied, as shown in FIG. 9, the upper arm 21 bends in the direction opposite to that of FIG. 8, and the arm coupling tool 24 absorbs the force. Therefore, similar to the first embodiment, breakage of the parallel arm due to external force is prevented.

[0019]

As described above, in the elevator door safety device according to the first aspect of the invention, since the viscoelastic body is provided at the intermediate portion of the parallel arm, the parallelism is caused by the collision with the safety shoe of the luggage or the trolley. It is possible to prevent the arm from breaking and improve the safety.

Further, in the elevator door safety device according to the invention of claim 2, since the parallel arm can be divided by the attachment portion of the viscoelastic body, in addition to the same effect as that of the invention of claim 1, the parallel arm is provided. If it should break, you can replace the parts of the parallel arm without removing the entire device.
This has the effect of shortening the time required for restoration.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing parallel arms of an elevator door safety device according to an embodiment of the present invention.

2 is a perspective view showing an assembled state of the parallel arm of FIG. 1. FIG.

FIG. 3 is an explanatory diagram showing a state when a force P is applied to the parallel arm in FIG.

FIG. 4 is an explanatory diagram showing a state when a force P ₁ is applied to the parallel arm of FIG.

5 is an explanatory diagram showing a state when a force P ₂ is applied to the parallel arm of FIG. 2. FIG.

FIG. 6 is an explanatory view showing a state in which the parallel arm in FIG. 2 is disassembled by an arm connecting tool.

FIG. 7 is a perspective view showing parallel arms of an elevator door safety device according to another embodiment of the present invention.

8 is an explanatory diagram showing a state when a force P ₁ is applied to the parallel arm in FIG.

9 is an explanatory view showing a state when a force P ₂ is applied to the parallel arm of FIG.

FIG. 10 is a schematic front view showing an example of a conventional elevator door safety device.

11 is a sectional view taken along the line XI-XI of FIG.

[Explanation of symbols]

 1 door 5 safety shoe 11 upper arm 12 lower arm 13 arm connector (viscoelastic body)

Claims (2)

[Claims] 1. An elevator door safety, wherein a safety shoe is attached to an elevator door via a parallel arm so as to project from an edge portion of the elevator door, and when the safety shoe retracts, the closing operation of the door is reversed. In the device, a viscoelastic body is provided in an intermediate portion of the parallel arms, and an elevator door safety device. 2. The elevator door safety device according to claim 1, wherein the parallel arm is separable at a mounting portion of the viscoelastic body.