JPS5920599B2 - Safety device for man conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety device for a passenger conveyor such as an escalator or an electric road, and particularly relates to increasing safety at the entrance/exit portion of a band rail.

Generally, a passenger conveyor is provided with a band rail that rotates at the same speed and in the same direction as the steps, and the band rail enters the inside of the machine at the longitudinal end of the passenger conveyor.

In FIGS. 1 and 2 showing conventional band rail entrances and exits, a band rail that has rolled on a floor plate enters a space Q formed by a band rail 2 guided by a band rail frame 1, a skirt guard 4, a floor plate 5, etc. There have been cases where human bodies that have fallen due to foreign objects or accidental causes have entered the body, and these foreign objects Z
Disasters have occurred where people have been strongly drawn into the area.

This problem is particularly serious in the case of young children, and there are cases where the child is pulled deep into the body by the frictional force of the rotating band rail 2 and injured.

Therefore, the following safety measures have been taken for the band rail entrances and exits.

In older examples, as shown in FIGS. 1 and 2, an inlet 3 made of synthetic rubber or the like is provided in front of a skirt guard 4.

This is a roughly box-shaped protector with a space S inside,
This is intended to prevent the foreign matter Z from being drawn in deeply.

However, since unexpected situations have frequently occurred in which children become interested in the coming and going of the band rail 2 and insert their hands into the band rail 2, and are pulled into the vicinity of the guide roller 6, the following improvements have been made recently.

That is, as shown in FIGS. 3 to 5, safety devices with built-in detection elements for detecting foreign object intrusion have appeared, and have exhibited great safety effects.

This structure protrudes greatly from the front of the skirt guard 4 (
An inlet 7 with a sufficient entrance/exit height (L = 100 to 200 mm) and a sufficient height (H = 100 mm or more) is provided, and inside this inlet 7 there are a support 8, a detection seat 9, springs 10 and 11, and a lever. 12, an actuating plate 13, and a bolt 14.

The details include a rotatable lever 12 supported on both sides by the arm portion 8a of the support body 8, a spring 11 that limits the movement of this lever 12, and an actuating plate 13 at the front. A bolt 14 for supporting the bolt 14 and a spring 10 for restricting its movement are arranged.

Then, as shown in Figure 4, the external force P generated by the intrusion of foreign matter Z
1, the front surface 7a of the inlet 7 retreats, and at this time, the actuating plate 13 and bolt 14 also retreat while contracting the spring 10.

In this case, the actuating plate 13 pushes the lower side 12C of the lever 12, and further pushes the detection switch 9 (actuating piece 9a) at the rear to finally stop the operation of the passenger conveyor.

On the other hand, if the child's fingertip T or the like enters the opening m of the inlet 7, the operation as shown in FIG. 5 is performed.

That is, when an external force P2 is generated due to the intrusion of the fingertip T, the upper side 12b of the lever 12 receives this external force P2, and at this time the lever 12 moves clockwise around the pin 12a fitted into the hole 8b. This actuates the detection switch 9.

Here, the method shown in FIGS. 3 to 5 can be said to be effective in terms of safety because it can deal with foreign matter Z entering the space Q or intrusion of fingers into the opening m.

Regarding the handrail entrance safety device explained above,
The following items that should be improved have been pointed out.

Recently, it has been discovered that most of the foreign objects Z mentioned above are human bodies, and there has also been a case where an infant who fell in the space Q was pulled into the handrail 2 and a part of the human body crawled under the inlet 7. It has occurred.

Therefore, it is necessary to desirably detect the intrusion below the inlet 7 and stop the passenger conveyor.

Furthermore, the device described in FIG. 3 and the like has many constituent parts, and there is still room for improvement in terms of economy.

In view of this point, the present invention has been made in order to increase the safety of the handrail entrance and exit portion and to provide a stable operating mechanism.

The gist of the present invention is to provide an upright, elastically deformable actuating plate that supports the inlet on the front at the rear of the inlet, and to open the upper part of the actuating plate by a width A so that a handrail can pass through. The operating plate and the rear lower part of the inlet are connected via a spring so that the rear lower part of the inlet can move backward when receiving an external force forward, and an operating plate extending rearward is provided at the rear lower part of the inlet, and on the other hand, A detection switch is provided on the rear surface of the actuating plate and is activated when the actuating plate moves backward.

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

In Figures 6 and 9, handrail frame 1,
The base structure of the handrail 2, floor plate 5, etc. is completely the same as the conventional one, but in the present invention, an actuating plate 15 is provided behind the inlet 14, which supports the inlet 14 and is elastically deformable.
and a spring 16 that contracts when this inlet 14 retreats.
, and the movement of both is detected by the detection switch 17.

Here, the actuating plate 15 has an actuating piece 15a that stands upright with an opening of a width A on both sides, sandwiching the handrail 2 that goes in and out.
It has a fixing part 15C that fixes a support piece 15b that supports the detection switch 17.

The actuating plate 15 is configured to support the inlet 14 with a screw 18 at the hole a portion, and to support the spring 16 with a screw 19 at the hole portion.

Further, an operating plate 20 is provided between the inlet 14 and the detection switch 17, and is fixed to the inlet 14 and has a slope 20a and a horizontal surface 20b on the detection switch 17 side.

The safety device composed of these parts is installed by bolting the fixing part 15C to the main frame 21 which is on the floor plate 5 and supports the skirt guard 4a (screwing the screw 22 into the hole C).
It is designed so that it can be installed.

Note that a slight gap is provided between the detection switch 17 and the operation plate 20.

Further, there is a gap G between the lower part of the inlet 14 and the actuating plate 15 to ensure a margin when the spring 16 contracts.

Next, the operation of the safety device according to the present invention will be explained.

When an external force P is applied to the front of the inlet as described in FIG. 4, the state shown in FIG. 8 occurs.

That is, when the front surface of the inlet 14 receives an external force P1, the actuating plate 15, which can be elastically deformed and retracted (δ in Fig. 7), and the compressible spring 16 are pushed by the inlet 14, and the actuating plate moves as shown in Fig. 8. 20 moves back by δ1, at this time the predetermined gap g1 disappears and the detection switch 17 is activated.

In this case, as shown in detail in FIG. 7, the support piece 15a moves back by δ, but since the fixed part 15c below it has a strong shape, the presence of the spring 16 comes into play. .

That is, in addition to the displacement of the upper end of the inlet 14, the lower end thereof can be retracted by the contraction of the spring 16.

Therefore, the inlet 14 has a mechanism in which both the upper end and the lower end can be retracted stably.

On the other hand, when external force R1 from above and external force R2 from below act on the inlet 14, the operating plate 20 acts as shown in FIG.
The horizontal portion 20b of the sensor is tilted to close the gap g2, and the detection switch 17 is activated.

The above-described stabilizing device is designed to issue an alarm or stop the passenger conveyor via an electric circuit, although illustration is omitted.

In this manner, the present invention has the advantage of providing a safety device that has an operating mechanism that is stable in the direction of external force.

Note that the present invention is not limited to the illustrative examples, and various application examples can be considered.

[Brief explanation of the drawing]

Fig. 1 is a side view of the conventional handrail entrance/exit, Fig. 2 is an internal sectional view of Fig. 1, Fig. 3 is an enlarged internal view showing another conventional method, and Figs. 4 and 5 are 3 is a cross-sectional view showing the main part, and FIG. 6 and subsequent figures show an embodiment of the present invention.
The figure is an internal perspective view showing the configuration of the main part of FIG. 6, and FIGS. 8 and 9 are explanatory views of the operation of the safety device, respectively. 2... Handrail, 14... Inlet, 15... Operating body, 17... Detection switch, 19... Spring.

Claims (1)

[Claims] 1. In a passenger conveyor with an inlet provided at the part where the band rail enters and exits, an elastically deformable actuating plate that supports the inlet on the front side is provided in an upright state behind the inlet, and the band rail passes above the actuating plate. On the other hand, the actuating plate and the rear lower part of the inlet are connected via a spring so that the rear lower part of the inlet can move backward when it receives an external force forward. 1. A safety device for a passenger conveyor, characterized in that an operating plate extending rearward is provided, and a detection switch is provided on the rear surface of the operating plate to be activated by retraction of the operating plate.