JPH0480193A - Control device for escalator or moving footway - Google Patents

Abstract

PURPOSE:To prevent an accident of human body due to misoperation of an operation switch during the inspection work by setting the operation switch of the other inspection port not to function when one inspection port is opened. CONSTITUTION:When a person in charge opens a first inspection port and intends to perform inspection for example, opening of the first inspection port is detected by a first opening detecting means 101A. A first contact 101A1 is connected to a second operation switch 10B provided in proximity to a second inspection port, and it becomes off when the first opening detecting means 101A2 detects opening. Consequently, even though the other person in charge on a second entrance operates the second operation switch 10B to intend to operate by mistake, the operation signal of the second operation switch 10B is ineffective, and operation is not perormed. Hereby, an accident of human body by misoperation of an operation switch in the inspection work can be prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a control device for an escalator or a moving walkway, and more specifically, to a control device for ensuring work safety during maintenance and inspection of an escalator or a moving walkway. It is related to the technology of

[Conventional technology]

Escalators or moving walkways are mainly installed in public places and move an unspecified number of users a certain distance at any time.

Therefore, maintenance and inspection work on these escalators and the like must be carried out periodically, and when a malfunction or the like occurs, it is necessary to carry out inspection work immediately.

In order to carry out such inspection work, an inspection port is usually provided below the boarding board of the boarding/exit door, and staff can check or repair internal equipment through this port. ing.

For example, Fig. 3 is an explanatory diagram showing the overall shape of an escalator including a horizontal movement section (which can also be said to be a section equivalent to a moving walkway).
Boarding boards 2A and 2B are attached to the other boarding gate 1B, respectively, and inspection ports (not shown) are provided below the boarding boards 2A and 2B, respectively. Near these inspection gates, there is a control panel 3 for operating the escalator.
A.

3B are provided respectively. In this figure, 4 is a parapet, 5 is a truss, and 6 is a building wall.

FIG. 4 is a view from the TV-IV arrow in FIG.
is a handrail belt, and 8 is a step.

FIG. 5 is a perspective view showing the inside of the operation panel 3A in FIG. 1 (the operation panel 3B is the same as 3A). 9A is a warning buzzer key switch, and IOA is an operation key switch. When the staff member operates the escalator, first insert the operation key into the insertion slot of the warning buzzer switch 9A, turn the key from the OFF side to the BZ side, and alert anyone near the escalator to the warning buzzer switch 9A. A buzzer sounds to warn you to drive. Next, the staff member removes the operation key from the warning buzzer key switch 9A, inserts it into the operation key switch IOA, and turns the operation key to the UP side or the DN side to perform ascending or descending operation.

FIG. 6 is a circuit diagram of a control circuit operated by such an operation. In this figure, the staff member uses the operation key described above to, for example, turn the contact point of the operation key switch IOA UP.
Suppose it falls to the side. Then, the current from the control power source flows through the safety circuit 11. The electric current flows through the operation key switch 10A and the normally closed contact 13b of the descending relay 13 to the ascending relay 12, and the excitation of the ascending relay 12 causes the escalator to operate upward.

After this, even if the staff member removes the operation key from the operation key switch 10A and the contact of the operation key switch IOA returns from the UP side to the neutral position (center position), the normally open contact 12a of the ascending relay 12 has already closed. Therefore, the current from the safety circuit 11 is passed through the inspection operation switch 14. It is supplied to the normally closed contact 13b and the rising relay 12 via the normally open contact 12a, so that a self-holding operation is performed.

The inspection operation switch 14 is used to turn off and release self-holding during inspection work, and is used at the entrance IA.
Control panel inside the inspection port on either side or IB side (not shown)
It is provided in Since the inspection operation switch 14 is plug-in type with a socket and is removable, it can be provided on either side. Further, each part of the inside of the escalator through which the step stool 8 passes is provided with a safety switch called a skirt guard switch, and the safety circuit 11 is a circuit composed of such skirt guard switches and other safety switches. be.

[Problem to be solved by the invention]

As mentioned above, escalator maintenance and inspection work is normally performed at one of the entrances and exits with the inspection door open by a staff member.

However, there is a possibility that while the staff member is performing inspection work at the entrance on one side, the staff member on the other side accidentally operates the escalator.

In such a case, the personnel performing the inspection work will be exposed to extremely dangerous conditions, which may directly lead to an accident resulting in injury or death.

In particular, modern escalators and moving walkways tend to become longer and longer, making it difficult to check the status of one entrance to the other, leading to the occurrence of the above-mentioned accidents. It is thought that the probability is increasing.

The present invention was made in view of these circumstances, and
The present invention aims to provide a control device for an escalator or a moving walkway that allows staff to perform inspection work safely.

[Means to solve the problem]

As a means for solving the above-mentioned problems, the present invention has first and second inspection ports provided at one entrance and the other entrance, respectively, and the vicinity of the first and second inspection entrances. It has first and second operation switches respectively provided in the first and second operation switches, and when performing inspection work, the first inspection port or the second inspection port can be opened to inspect the equipment stored therein. In a control device for an escalator or a moving walkway, which performs inspection operation by operating a first operation switch or a second operation switch, provided at each of the first and second inspection ports, First and second open detection means for detecting that these inspection ports are opened are connected to the second operation switch, and are turned off when the first open detection means detects that the inspection port is opened. a first contact point for disabling the operation signal of the second operation switch; and a first contact point connected to the first operation switch;
and a second contact point which is turned off when the second open detection means detects an open state and invalidates the operation signal of the first operation switch.

[Effect]

In the above configuration, the staff member attempts to perform inspection work by opening the first inspection port, for example. Then, the first opening detection means detects that the first inspection port is opened.

The first contact is connected to a second operation switch provided near the second inspection port, and is turned off when the first open detection means detects an open state.

Therefore, another staff member at the second entrance/exit may accidentally
Even if an attempt is made to operate the second operation switch, the operation signal of this second operation switch is invalidated and the operation will not be performed.

The same operation as described above occurs when the staff member attempts to perform inspection work by opening the second inspection port.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. However, components similar to those shown in FIGS. 3 to 6 are designated by the same reference numerals, and redundant explanations will be omitted.

FIG. 2 is a plan view of one of the entrances and exits IA (see FIG. 3) in this embodiment. A limit switch 101A is provided at the inspection port below the board 2A, and when two people lift the board, it is detected that the check port has been opened. Although not shown, a similar glue mint switch 101B is also provided at the inspection port below the boarding plate 2B of the other boarding port 1B.

FIG. 1 shows such limit switches 101A, 10
1B is a circuit diagram of this embodiment configured using 1B. In this figure, first and second open detection means 101A1.
l0IB, is the above limit switch l0IA, l0I
This corresponds to the plunger part of B.

Then, in the normal state, that is, the state in which the inspection gates of the entrances IA and IB are blocked by the entrance and exit boards 2A and 2B, the first.
It is assumed that the second contact 101A2° 101B2 and the self-holding contact 101A3° 10183 are closed.

Next, the operation shown in FIG. 1 will be explained. Under normal conditions,
1st. The second contact 101A2° 101B2 and the self-holding contact 101A3° 101B3 are closed, but this state is the same as in FIG. 6. Therefore, when the staff member uses the operation keys to cause the escalator to operate normally, the same operation as in the past may be performed.

Next, in order to carry out maintenance and inspection work, the staff member lifts up the boarding board 2A of the first boarding and exit IA, and furthermore, the inspection port is
If it is on the side where the control panel is installed, the inspection operation switch 14 is turned off.

When the board 2A is lifted, the first open detection means 10
1A1 detects the opening of the first inspection port, and the first contact 101A2 (and self-holding contact 101A3), which had been on until then, is turned off.

Then, the staff member turns the contact point of the first operation switch (operation key switch) 10A to the UP side or DN side to perform the ascending operation or descending operation, and performs the inspection work.

Note that during inspection work, the inspection operation switch 14 and self-holding contact 101A3 are turned off, so the staff member must press the first operation switch IOA with the operation key inserted.
Operation will be performed only while it is held on the P side or DN side.

Suppose that while such inspection work is being carried out, another staff member goes to the second entrance/exit 2B and accidentally flips the second operation switch IOB to the UP side or the DN side.

However, in this case, since the first contact 101A2 is already turned off, no matter which way the second operation switch IOB falls, the rising relay 12. The descending relay 13 is not energized and the escalator does not start moving. Therefore, it is possible to prevent personal accidents caused by erroneous operation of the operation switch during inspection work.

Note that in the above embodiment, the first. Although the case has been described in which the second open detecting means is the plunger portion of the limit switch and the first and second contacts are the contacts of the limit switch, the first. An appropriate sensor such as an optical sensor or a magnetic sensor is used as the second open detecting means, and the first open detecting means uses an appropriate sensor such as an optical sensor or a magnetic sensor. It is also possible to use suitable semiconductor elements for the second contact.

[Effects of the Invention] As described above, according to the present invention, when one inspection port is in an open state, the operation switch on the other inspection port side does not work, so that erroneous operation of the operation switch is avoided. It is possible to prevent accidents resulting in injury or death during inspection work.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a plan view of the vicinity of one entrance and exit according to the embodiment of FIG.
The figure is a schematic diagram showing the appearance of an escalator or a moving walkway, Figure 4 is a view from the ■■ arrow in Figure 3, Figure 5 is an enlarged perspective view of a part of Figure 3, and Figure 6 is a conventional FIG. 3 is an example circuit diagram. 10A, IOB... 1st. second operation switch, 10
1A,,l0IB,...1st. second open detection means;
101A2, 101B2... 1st. Second contact point.

Claims (1)

[Scope of Claims] First and second inspection ports are provided at one entrance and the other entrance, respectively, and the first and second
It has a first and second operation switch installed near the inspection port, respectively, and when performing inspection work, the first or second inspection port is opened and the device is stored inside. In a control device for an escalator or a moving walkway, which allows equipment to be inspected and which performs inspection operation by operating a first operation switch or a second operation switch,
first and second open detection means provided at each of the first and second inspection ports to detect that the inspection ports have been opened; a first contact that is turned off when the first open detection means detects an open state and invalidates the operation signal of the second operation switch; A control device for an escalator or a moving walkway, comprising: a second contact point that is turned off when the open detection means detects the open state and invalidates the operation signal of the first operation switch.