JPS606580A - 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 [Field of Application of the Invention] The present invention relates to a door safety device for an electric door used in an elevator or the like.

[Background of the invention]

A conventional door structure will be explained using FIG. 1 as an example of a horizontally swinging door for an elevator. In FIG. 1, the actuating piece 2 is the door l.
It is movably attached to the door 1 by a lever 5 in the opening/closing direction through an upper seat 3 and a lower seat 4 fixed to the upper seat 3 and the lower seat 4, respectively. Here, when door l is closed, if a human body or a load touches actuating piece 2, Leno (-5) rotates diagonally upward using upper seat 3 and lower seat 4 as fulcrums, and actuating piece 2 retreats. At this time, the switch 6 is activated by the operation of the lower lever 5, and the ready-to-use motor is reversely rotated through the cord 7 connected to the ready-to-use motor (not shown), and the door l is opened. Invert.

This is an indispensable safety structure to prevent accidents where people or luggage get caught in the door, and is now standard equipment in elevators.

However, as shown in FIG. 2, only the input direction is effective for the direction of the force acting on the actuating piece 2, and Bs is perpendicular to the actuating piece 2.
However, the Bt force direction has the disadvantage that it does not work with the door reversing mechanism as described above. This problem is particularly serious in inbound elevators and cargo elevators that often use trolleys, forklifts, etc., and a solution is desired.

In other words, when you are trying to load a trolley, forklift, etc. into the elevator, J, Ii! 1 begins to close and collides with the side surface 2aK of the actuating piece 2. At this time, as mentioned above, 1iH1 is a force B+ in the 11 angular direction with respect to the actuating piece 2, 13
Since the iJ cannot be reversed in two directions, the inertial force of the truck or forklift deforms or damages the actuator Db piece 2, lever 5, etc., and the elevator cannot move up or down. Such accidents occur particularly frequently in incoming cargo elevators, but they can also occur in passenger elevators due to collisions with cargo, etc.! l11
As a result, customers are unable to use the elevator due to repairs such as replacement of operating pieces each time, resulting in great inconvenience.

[〉Object of C5 Ming] The object of the present invention is to provide a door safety device with a dolly, a forklift,
An object of the present invention is to provide a door safety device that prevents damage caused by collision of loads with equal force.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 3 is a structural diagram (corresponding to Figure 1) showing an embodiment of the door safety device according to the present invention.

In FIG. 3, a connecting body 8 is provided between the actuating piece 2 and the lever 50. Furthermore, when the actuating piece 2 rotates in the left-right direction, the connecting body 8 has a 131
Or, when an external force is applied in the B2 direction, 1 actuating piece 2
A switch 9, which is activated by the movement of the door and forms a door reversing circuit, and a return device 10, which returns the actuating piece 2 rotated in the left-right direction to its normal state when the external force is removed, are attached. Here, each +i [4 will be explained in detail below.

The connecting body 8 and the actuating piece 2 are connected by a mechanism shown in FIGS. 4 and 5. Figure 4 is an enlarged view of part ■ in Figure 3, and Figure 5 is an enlarged view of the i! I! This is a sectional view taken in the ■ direction in Figure 4.

As shown in FIG. 4, a fulcrum pin 11 is attached to the connecting body 8 at a portion that fits into the actuating piece 2.
1 is fitted with the fitting piece 12 attached to the rear of the actuating piece 2, and the fulcrum pin 11.1 is fitted in the direction of the arrow shown in FIG. That is,
It is rotatable using the rear of the actuating piece 2 as a fulcrum. Of course, the connecting mechanism is also installed in the lower connecting body part, so that the actuating piece 2 can move in the opening and closing directions as in the conventional case, and can also rotate in the left and right directions. .

FIG. 6 is a sectional view taken in the B direction of FIG. 3, and shows the configuration of a switch that detects the movement of the operating piece 2 when it rotates in the left-right direction as described above and forms a door reversing circuit.

As shown in FIG. 6, the switch 9 is attached to the connecting body 8 and has a chevron-shaped operating body 1 attached to the rear of the actuating piece 2.
In the old capital 13a of No. 3, the actuator 98 is normally in a pressed state.

In the switch 9 configured in this way, the actuating piece 2 is rotated in the left-right direction at the rotation center C1, that is, the fulcrum pin l in FIG.
When rotated around 'l, the actuator 98 protrudes to the operating side along the side surface 13b of the operating body 13,
Switch 9 is released, the open/closed state of the switch is reversed,
It is designed to form a sin reversal circuit.

Here, the shape of the operating body 13 is not only a simple chevron shape as shown in FIG. 6, but also a chevron shape as shown in FIG. It may also be one with a small depression 13c. Kono Kuhomi 13c
is made with dimensions such that the switch 9 is released at its bottom, and according to this, it is possible to set the release position of the switch 9, that is, how far the actuating piece 2 is rotated in the left and right direction when the door is reversed. It becomes easy to set whether to form a circuit.

FIG. 8 is a sectional view taken in the {circle around (2)} direction in FIG. 3, and shows the configuration of a return device 1O for returning the actuating piece 2 rotated in the left-right direction to its normal state.

As shown in FIG. 8, this return device IO includes an arc-shaped receiving plate 14 attached to the connecting body 8, a holder 15 fixed to the inside of the actuating piece 2, and a holder 15 that is held by the holder 15. It is composed of a return spring 16 and a rod 18 having a spring seat 17. Due to this configuration, the rod 18 always has a pushing force in the direction of the plate 14 due to the spring force of the return spring 16. A rolling element 19 is attached to the tip of the rod 18, and after the actuating piece 2 rotates in the left and right direction, the rolling element 19 tries to return to its normal state. This is to reduce the frictional force, so that the rod 18 can be returned to its normal state with a smaller force than when the rod 18 is brought into direct contact with the plate 14, and Malfunctions due to stiffness of the rod 18 and the receiving plate 14 can be prevented.

The principle of return of the actuating piece 2 will be explained using FIG. 9.

When the actuating piece 2 is rotated in the left-right direction about the center of rotation C by an external force perpendicular to the door opening/closing direction, the actuating piece 2 is in its normal state with the arc diameter R of the plate 14. If the center of rotation C of the S-coupling is set smaller than the distance between the receiving plates 14, the distance t between the center of rotation C and the rolling element 19 attached to the tip of the rod 18 will be reduced. That is, when the rod 18 is pushed into the actuating piece 2, the -c1 return spring 16 is compressed via the spring seat 17 attached to the rod 18, and the rod 18 is
Pushing to 4 = J The spring force P increases. and,
This spring force P includes a force F at which the rolling element 19 presses against the receiving plate 14 at the contact point between the rolling element 19 and the receiving plate 14, and a force F exerting an effort to rotate the rod 18 around the rotation center C. This component force F2 is created by the two components of force F2! This is because it becomes a restoring force that tries to return the 1b piece 2 to its normal state. In addition, the actual return force F3 of the actuating piece 1i7b piece 2 is obtained by changing the component force F2 by the distance l between the rotation center C and the rolling element 19, and the distance Ll between the rotation center C and the tip of the actuating piece: 'ijL
Therefore, in order to obtain the required return force F2 depending on the size of the rabbit, the size of the actuating piece 2, etc., the spring holder of the return spring 16 is determined by measuring the arc diameter R of the plate 14. Appropriate selection is essential.

In addition, the restoring device [10] is attached to the receiving plate 14 in Figs.
The shape shown in the figure is also a rumble.

Figure 1O shows the normal setting of the rod 18, i.e.,
When the actuating piece 2 is in a normal state, the receiver is provided with a concave portion 14a2 having a smaller arcuate diameter than the arcuate diameter of the plate 14 at the contact point between the rolling element 19 at the tip of the rod 18 and the receiving plate 14.

As shown in the figure, these four parts may be set to have approximately the same arc diameter as the radius of the rolling HC+b body 19, thereby increasing the holding force for holding the work piece 2 in the normal state, and providing immediate It is possible to prevent the actuating piece 2 from wobbling due to opening and closing, and the malfunction of the switch 9 due to this wobbling.

In Fig. 11, the arc diameter of the receiving plate 14 explained in Fig. 9 is not set to a single arc diameter R, but the arc diameter R at the center of the plate 14 is set smaller than the arc diameter R7 at both sides. I'm doing it. This means that the component force F2 explained in FIG. This prevents it from becoming smaller as you urinate. t, that is, the component force F2 is determined by the angle formed by the spring force P explained in FIG. As the hb piece 2 returns to its normal state, the component force F at which this angle is small also becomes smaller. Therefore, by setting the arc diameter of the receiver smaller at the center of the plate 14 than at both sides, the spring force P and the force F1 of the rolling elements 19 pressing against the receiver plate 14 are set.
The bridge is an effective means for preventing a decrease in the component force F2 at the center of the machine and a decrease in the return force F of the tab and actuating piece 2 by increasing the angle formed by the lever. Of course, the arc diameter of the receiving plate 14 cannot be set in two stages like this.
It would be more effective to change the arc diameters to three or more stages with appropriate arc diameters, but it would be very difficult to manufacture, so as mentioned above, it would be sufficient to change the arc diameters R1 and R to two stages. Experiments have shown that a good restoring force can be obtained.
An unnecessarily complicated shape is also undesirable from a cost standpoint.

Note that the four central parts of the receiving plate 14 and the two-step setting of the arc diameter of the receiving plate 14 explained in FIGS. Accordingly, a more effective receiving plate can be obtained.

In addition, although the door safety device described above has been explained in detail by taking a side-opening door as an example, it can also be used for a door that opens and closes downward, as well as a door that opens from the bottom.

Furthermore, although the structure of the return device lO is shown in FIG. 3, where it is attached to each of the connecting bodies 8, in cases where a large number of connecting bodies 8 are required, such as those with high door quotient, it is necessary to obtain the required return force. , there is no need to attach the connectors 8 to each.
If it is not possible to attach it to the door 1, it may be attached to an appropriate position on the door 1.

〔Effect of the invention〕

According to the present invention, the door reversing device includes a truck, a forklift,
Accidents of damage caused by luggage etc. being bumped can be prevented, and the product can always be used in good condition.

[Brief explanation of drawings]

Fig. 1 is an overall structural diagram of a conventional glue 1 safety device, Fig. 2 is an explanatory diagram of the operating direction of the actuating piece, Fig. 3 is an overall structural diagram of a door safety device according to an example of the present invention, and Fig. 4 is A detailed view of the part ■ in Figure 3, Figure 5 is a cross-sectional view taken along the ■-■ arrow in Figure 4, Figure 6 is a cross-sectional view taken along the V+-■ arrow in Figure 3, and Figure 7 is a cross-sectional view taken along the arrow V+-■ in Figure 6. A cross-sectional view of another embodiment, FIG. 8 is a cross-sectional view taken along arrows II-Mll in FIG. 3, FIG. 9 is an explanatory diagram of the return principle of the actuating piece, and FIG.
FIG. 11 is an explanatory diagram of another embodiment of the receiving plate shape. l...door, 2...operating piece, 3...upper seat, 5...
Lever, 6...switch, 7...cord, 8...
Connector, 9...Sui fan 8 figure name q figure 1 O figure II. Funeral 1/Figure

Claims (1)

[Scope of Claims] 1. An operating piece attached to the tip of a door that is driven to be opened and closed by an electric motor so as to protrude from the door and be movable in the opening and closing directions via a lever; In a device that operates a switch so as to form a reversing circuit by the operation of an actuating piece, there is provided a connecting body connected to the rear of the actuating piece and supporting the actuating piece so as to be rotatable in the left-right direction, and a connecting body connected to the lever. and a switch that is rotatably supported on the connecting body and that is actuated to form a door reversing circuit when the actuating piece rotates in the left-right direction, and a means for returning the actuating piece to its normal state. Characteristic B? Safety device. 2. Operates when the actuation piece rotates in the left and right direction;
2. The door safety device according to claim 1, further comprising a protruding body provided behind said actuating piece as an operating body for said switch forming a door reversing circuit. 3. A means for returning the actuating piece to its normal state is provided in the rod that receives a pushing force to the rear of the actuating piece through an elastic body in the actuating piece jHIl, and in the front Me connection body, The door safety device according to claim 1, characterized in that it comprises an arcuate receiving plate that receives force. 4. The door safety device according to claim 3, wherein a rolling element having a smaller diameter than the circular arc diameter forming the plate is provided at the tip of the rod. 5. The door safety device according to claim 3, wherein the receiver is a plate, and the receiver is provided with four parts having a smaller diameter than the circular arc diameter forming the plate at the normal setting position of the rod. 6. The door safety according to claim 3, wherein the receiver is formed so that the center part of the plate has a smaller arc diameter than both sides of the plate. Device.