JPH04327491A - Safety device for man conveyer - Google Patents

Abstract

PURPOSE:To provide a skirt guard switch for a man conveyer, which has a simple structure and which is easily adjustable. CONSTITUTION:In a safety device for a skirt guard, the skirt guard 3 is attached to an insulating resin resilient member 15 which is provided thereto with an electrical contact 17. The resilient member 15 is displaced in association with a displacement of the skirt guard so that the electrical contact is opened closed.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to safety devices for passenger conveyors such as escalators and moving walkways.

0003

2. Description of the Related Art Conventionally, skirt guard switches shown in FIGS. 5 and 6 have been used in escalators, for example.

In FIG. 6, the escalator has a handrail belt H attached to the periphery of the handrail B via a guide rail.
An endless step S is provided which moves in synchronization with the step S, and is driven by a drive device (not shown).

[0005] Skirt guards 3 are attached to the left and right ends of the step S with a slight gap therebetween via attachment members 2 provided on the main body.

[0006] In general, in escalators, shoes and foreign objects are likely to get caught due to friction with the left and right skirt guards during the transition of the plurality of steps S from horizontal to inclined and from inclined to horizontal in the upper and lower landing sections. A skirt guard switch is installed on the back side of the skirt guard 3, and the deflection displacement and elasticity value of the skirt guard 3 are set according to the expected detection values, and in the unlikely event that a foreign object is caught, it is immediately detected and the escalator is stopped or an abnormality occurs. There are safety devices in place, such as alarms to let you know when something is wrong.

Specifically, as shown in FIG. 5, the upper part of the skirt guard 3 is sandwiched between the mounting members 2, 2 which are pre-attached to the escalator body frame, and the lower part is sandwiched between the screws 5 and the lower part by a member 3a which is attached by welding or the like. It is tightly fixed to prevent it from slipping down.

On the other hand, the step 1 has a gap G (2 to 5 mm
), the gap with the skirt guard switch is 0 to 0.5 mm.
It is set to a certain extent.

The skirt guard switch 7 has a detection pin 9
A microswitch 13 is supported by a switch support 10 via a compression coil spring 12 with a predetermined distance g between its tip and the back side of the skirt guard 3.
is fixed to the horizontal part of the switch support. The switch support 10 is fixed to a mounting member 14 provided on the main body side via an adjustment shim 14a.

On the other hand, the inner ledge 4 is attached to the mounting member 2 with screws 6 so as to press down on the skirt guard 3, and constitutes a parapet.

With the skirt guard switch 7 configured as described above, when a foreign object enters the gap between the step 1 and the skirt guard 3, the skirt guard 3 is pushed outward, and the dimension of this spread is the difference between the skirt guard 3 and the detection pin 9. When the predetermined interval g is gone, the detection pin 9 is moved back and the microswitch 13 is activated to detect a foreign object.

The mounting position of the skirt guard switch 7 is as follows:
It depends on the type of escalator and floor height, but in general, Figure 6
They are often installed in several locations on the upper and lower floors, such as in

[0013]

However, in the above configuration, the deflection characteristics of the skirt guard 3 depend on the rigidity of the mounting member 2, and errors in detection accuracy are likely to occur when a foreign object is caught.

Furthermore, in order to improve the adjustment accuracy, the structure of the skirt guard switch has a complicated adjustment part and extends to the rear side of the skirt guard, which requires a large amount of space, and if the skirt guard 3 is not removed, the skirt guard There are problems with workability, such as the inability to adjust switches.

Furthermore, since safety measures were not taken for the skirt guard over the entire length of the escalator, if the skirt guard detector were to be placed in the center of the upper and lower floors excluding the curved sections, the skirt guard and mounting material 2 would be There is a problem that the deflection characteristics are different from those of the upper and lower floors, and the detection accuracy of the detector cannot be made uniform.

In view of the above, it is an object of the present invention to provide a skirt guard switch for a passenger conveyor that can improve the detection accuracy of the skirt guard switch, simplify the method of adjusting the switch, and can be installed at any position and provide the same detection characteristics. .

[Configuration of the invention]

[0018]

[Means for Solving the Problems] The present invention provides a safety device for a passenger conveyor, which includes a skirt guard separated from the fixed side of the step, and a means for detecting when a foreign object enters the gap between the steps. , an elastic body is attached to a mounting member provided on the fixed side, a switch built into this elastic member and a skirt guard attached via the elastic body are configured, and the skirt guard switch is attached from the step side using the skirt guard. It is equipped with a means for adjusting the

[0019]

[Operation] According to the above structure, when a foreign object enters the gap between the step and the skirt guard, the skirt guard is pushed and the elastic body of the attachment portion thereof is deformed. During this process, a switch which is operated by elastic deformation and which is provided in advance in the elastic body is operated when the operating setting value is reached, and an abnormality between the step and the skirt guard is detected.

[0020] Here, when adjusting the above-mentioned skirt guard switch to an appropriate set value, the present invention has a structure in which the skirt guard switch adjustment means can be operated from the step side in advance on the elastic body provided on the back side of the skirt guard or on the attachment part. Since the skirt guard is attached, adjust it to the desired setting value on the step side.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an escalator will be described with reference to the drawings. As shown in FIGS. 1 to 3, the mounting material 2 supported by the escalator body is laid almost continuously from the lower floor terminal to the upper floor terminal where the skirt guard 3 is attached, and the inner ledge that forms the handrail. 4 is similarly installed over almost the entire length of the parapet.

[0022] Of course, the skirt guard 3 also slightly exceeds the movement range of the steps 1 and is 2 to 5 mm near the left and right sides of the steps.
It is filled with gaps in the range of .

The skirt guard 3 is made of a steel plate material (stainless steel, etc.) itself or a relatively thin member having a low friction material applied to the surface and having an appropriate stiffness, allowing an appropriate amount of deflection when pushed from the step side. is used.

On the other hand, in the skirt guard, an elastic body 15 is fixed to a necessary part of the mounting member 2 with screws 16, and this is used as a pedestal to abut the stepped portion 15a, and is fixed to the elastic body 15 with screws 5.

The elastic body 15 is made of electrically insulating resin or the like, and is formed in an inverted U-shape that opens downward, and has a groove 17a and an electric contact piece 18 on the opposite side of the opening to which the electric contact 17 is attached. A mounting groove 18a is provided.

An adjuster 22 is attached to the portion of the electric contact piece 18 that is engaged with the groove 18a through the electric contact piece 18, and is held with a gap B between the surface of the electric contact 17 and the electric contact piece 18.

This adjuster 22 is provided at a position viewed from the step side, approximately concentric with the position of the adjustment hole 36 provided in the skirt guard 3, and an electrically insulating portion 22a is provided on the operation side head to prevent electric shock. A contact 22b with low electrical resistance is attached to the other end. A threaded portion is provided on the cylindrical outer periphery of the electric conductor portion 22c of the adjuster 22, which is screwed into the elastic body 15 and conducts with the electric contact piece 18, and this portion prevents the adjuster 22 from rotating due to vibrations during normal use. Therefore, a spring-type rotation prevention mechanism is provided.

By the way, since it is necessary for the elastic body 15 to appropriately obtain elastic deformation by the acting force when the skirt guard 3 is pushed, the size of the cross section on the skirt guard side of the inverted U shape and the spring constant are etc. are set in consideration of the material, plate thickness, width, and arrangement pitch of the elastic bodies 15.

In order to incorporate the skirt guard switch having the above structure into the escalator main body control circuit, the electrical contact 17 and the electrical contact piece 18 are provided with a lead wire 19, and are connected to the wiring 20 from the control device by a connector 21, and the wiring 20 is Connected by a connector 21 and connected by a wiring 20
is held close to the clamp 22.

Therefore, the skirt guard switch of the present invention is provided between the mounting member 2 and the skirt guard 3 to save space, and the detection accuracy is also improved because the skirt guard switch is provided at the mounting portion of the skirt guard 3. The acting force received from the skirt guard 3 is immediately transmitted to the elastic body 15 and it begins to deform, and when the amount of deformation reaches a predetermined value, the electrical contact 17 and the contact 22b of the adjuster 22 come into contact, which is different from the conventional mounting material. Since it is not affected by 2, highly accurate detection is possible.

To adjust the contacts of the skirt guard switch 3, after removing the inner ledge 4, with the skirt guard 3 attached from the step 1 side, turn the adjuster 22 through the adjustment hole 3b with a tool such as a screwdriver to adjust the gap g1. Adjust to desired value.

Furthermore, when the gap G is widened due to the intervention of a foreign object between the step 1 and the skirt guard 3, the deflection deformation of the skirt guard 3 and the deformation of the elastic body 15 in the direction of narrowing the inverted U-shaped opening gap are combined. appears.

Therefore, the spring constants of the skirt guard 3 and the elastic body 15 are selectively set and detected depending on the detection method and characteristics.

Although the embodiment of the normally open contact type skirt guard switch has been described above, as shown in FIG. Similar to the previous example, an inverted U
A groove-shaped opening 23a opening downward in a letter-like shape is provided, and a contactor 25 made of a conductive material is attached to the opening 23a as shown in the figure. The contactor 25 is fitted into the opening 23a, and the downwardly protruding contact fingers are made of an elastic material having a spring action and constitute a normally closed contact with the contact portion 2b as a contact opening/closing portion.

Further, an adjuster 27 made of an insulating material for adjusting the opening/closing of the contact is screwed perpendicularly to the protrusion of the elastic body 23b, and the adjustment hole 3b is screwed into the adjustment hole 3b so as to match the mounting position of the adjuster 27. is open.

The electrical contacts are connected to the contacts 24 and 25 with lead wiring and incorporated into the control circuit of the escalator body.

Even with this configuration, the same effect as in the previous embodiment can be obtained.

[0038]

[Effects of the Invention] According to the present invention, the structure of the skirt guard switch is small and simple, and the structure is small and simple.
You can freely install it in any position below. Also,
Since the operating point of the switch can be adjusted from the step side with the skirt guard attached, adjustment work can be made easier and more reliable not only during escalator installation but also during maintenance.

Furthermore, by using the detection switch as the elastic body deforms, the detection accuracy is improved and the overall reliability is improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a skirt guard switch according to the invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a detailed view of a portion of FIG. 1;

FIG. 4 is a cross-sectional view of another embodiment of the invention.

FIG. 5 is a sectional view of a conventional skirt guard switch.

FIG. 6 is a side view of the skirt guard portion of the escalator.

[Explanation of symbols]

1...Steps
2...Mounting material 3...Skirt guard
7...Skirt guard switch

Claims (1)

[Claims] [Claim 1] A safety device for a passenger conveyor that includes a skirt guard installed on the side of the step and a means for detecting that a foreign object has entered the gap between the steps, comprising: a mounting member provided on the fixed side; An elastic member is attached, a switch built into the elastic member, and a skirt guard attached via the elastic member, and means is provided for adjusting the skirt guard switch from the step side using the skirt guard. A safety device for passenger conveyors featuring: