JPH0737316B2 - Passenger conveyor braking system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking device for a passenger conveyor, and more particularly to an improvement in safety during braking of a passenger conveyor that is installed at an inclination.

[Conventional technology]

FIGS. 6 to 8 show a conventional passenger conveyor device disclosed in, for example, Japanese Examined Patent Publication No. 63-30275, in which (1) is a main frame and (2) is an endless frame. The main frame (1) is a tread chain having a forward path on the upper surface side and a return path on the lower surface side, and a rack (2a) is provided inside. (3)
Is a tread that is connected to the tread chain (2) and arranged in large numbers, and (4) is a first tread provided in the longitudinal middle of the main frame (1).
The drive machine is provided with a drive chain (4a) which is in the form of an endless track and which engages with the rack (2a) on the forward side and the return side of the tread chain (2), respectively. Reference numeral (4 ') is a second driving machine similar to the first driving machine (4), which is arranged apart from the first driving machine (4) and has a braking device (5) in addition to the driving chain (4a).
Is provided. (5a) is a brake disc of a brake device (5) driven via the drive shaft of the drive chain (4a),
(5b) is a compressing body that compresses the brake disc (5a) from both sides by the compression coil spring (5c), and (5d) resists the compression coil spring (5c) when energized. It is an electromagnet that releases the body (5b).

The conventional passenger conveyor is constructed as described above,
At the same time as the driving machines (4) (4 ') are energized, the electromagnet (5
d) is energized and the brake device (5) is released. Then, the tread chain (2a) is driven by the drive chain (4a) and the passenger on the tread (3) is transported. Although not shown in the drawings, the passenger conveyor is provided with a safety device, for example, between the skirt guard and the side surface of the tread that operates when an infant inserts shoes. When such a safety device operates, the first and second driving machines (4) (4 ') and the electromagnet (5d) are deenergized. As a result, the tread (3) is braked and stopped through the braking operation of the brake device (5).

[Problems to be Solved by the Invention]

In the conventional passenger conveyor as described above, the braking ability of the brake device (5) is constant, and the same braking is performed regardless of whether the driving direction is up or down. However, when the passenger conveyor is braked during ascending operation, the load of the passenger acts as a braking force. For this reason, if the braking force of the brake device (5) is set so that the stopping distance is set to an appropriate stop distance for safety when the passenger conveyor during the descending operation is braked, when the passenger conveyor is braked during the ascending operation, the When there are many, excessive braking force is applied. Therefore, there is a problem that the stopping distance becomes short during braking during the ascending operation, which may cause a large impact to the passengers or cause the passengers to fall.

The present invention has been made in order to solve such a problem, and an object of the present invention is to obtain a braking device for a passenger conveyor with a small difference in stopping distance during braking during ascending operation and during descending operation.

[Means for Solving the Problems]

In the passenger conveyor braking device according to the present invention, there is provided a first brake capable of braking during both ascending operation and descending operation, and a second brake having a one-way operation mechanism capable of braking only during descending operation. A control device is provided for braking only the first brake during the ascending operation according to the stop command and for performing the braking operation of the first brake and the second brake during the descending operation.

[Action]

First Passenger Conveyor Brake Device Constructed as Above
By appropriately setting the braking abilities of the brake and the second brake, it is possible to reduce the difference between the stopping distance due to the braking during the ascending operation and the stopping distance due to the braking during the descending operation.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

In the figure, the same reference numerals as those in FIGS. 6 to 8 indicate corresponding parts,
(5) is a first brake provided in the second drive unit (4 '), which is configured similarly to the brake device (5) in FIGS. 7 and 8 and is provided with a brake disc and a compression body. ing.
(6) is a second brake provided on the first drive machine (4), (6a) is a shaft driven by the first drive machine (4),
(6b) is a ratchet wheel that is rotatably supported on a shaft (6a), and is provided with a claw (6c). (6d) is a friction plate that rotates with the shaft (6a) and presses the ratchet wheel (6b) from both sides, and (6e) has an intermediate part pivotally supported by the first driving device (4) and one end facing the claw (6c) The blocking piece (6f) arranged in the same manner is provided on the anti-claw wheel (6b) side of the blocking piece (6e) and urges the blocking piece (6e) in the direction of engaging the claw (6c), (6g) is an electromagnet that displaces the blocking piece (6e) away from the pawl (6c) against the spring (6f) when biased, and (7) is the pawl wheel (6b) and the blocking piece (6).
e) as a main component, the pawl wheel (6b) is rotated by the engagement of the pawl wheel (6c) with the blocking piece (6e) when the passenger conveyor is lowered. A one-way operation mechanism that prevents rotation. Even if this one-way operation mechanism (7) operates during ascending operation, the pawl (6c) and the blocking piece (6e) do not engage with each other, and the ratchet wheel (6b) rotates. It has a configuration that cannot block. (8)
Is a normally open contact of the stop command means, (9) is an ascending operation detecting means for outputting an output during the ascending operation of the passenger conveyor, (10) is a descending operation detecting means for outputting an output during the descending operation of the passenger conveyor, (11) Is an OR gate, (12) is an AND gate, and (13) is also an A
An ND gate, (14) is a first control command, (15) is a second braking command, and (16) is a control device including ascending operation detecting means (9), descending operation detecting means (10), and the like.

In the passenger conveyor braking device configured as described above, if the stop command means (8) issues a command while the passenger conveyor is in the ascending operation, the ascending operation detecting means (9) produces an output. Therefore, the OR gate (11) produces an output and the AND gate (12) produces an output. As a result, the first braking command (14) is issued, the electromagnet (5d) of the first brake (5) is deenergized, and the first brake (5)
The passenger conveyor is braked by the sole. If the stop command means (8) issues a command while the passenger conveyor is in the descending operation, the descending operation detecting means (10) produces an output, and the OR gate (11) and AND gate (12) An output is generated, and the first brake (5) is braked via the first braking command (14). Further, the AND gate (13) also generates an output, the second braking command (15) is issued, the electromagnet (6g) of the second brake (6) is deenergized, and the second brake (6) is generated.
Brakes. Therefore, when a stop command is issued while the passenger conveyor is descending, the passenger conveyor is braked by the first brake (5) and the second brake (6). Therefore, by appropriately setting the braking ability of each of the first brake (5) and the second brake (6), the difference between the braking stop distances during the ascending operation and the descending operation can be reduced. In addition, it is possible to prevent the passenger conveyor from being given a large impact or falling by stopping the passenger conveyor at a safe stop distance both during the ascending operation and the descending operation, thereby improving safety.

Also, at the time of power failure, the electromagnet (5d) of the first brake (5),
The electromagnet (6g) of the second brake (6) is de-energized, but since the second brake (6) is provided with the one-way actuating mechanism (7), there is a second No braking force is exerted on the brake (6). Therefore, it is possible to prevent the occurrence of troubles due to an excessive braking force when a power failure occurs during the ascending operation. Further, even if the second brake malfunctions during the ascending operation, the braking force is not generated in the second brake, so that the passenger conveyor does not stop and it is safe.

〔The invention's effect〕

As described above, the present invention is provided with the first brake that can be braked during the ascending operation and the descending operation of the passenger conveyor, and the second brake that has the one-way operation mechanism and that can be braked only during the descending operation. In response to the stop command, only the first brake is operated during the ascending operation and the first brake is applied during the descending operation.
The brake and the second brake are braked, and the braking action of only the first brake is generated at the time of stopping during the ascending operation. By this, the braking force of the first brake and the second brake are appropriately set, and during the ascending operation,
The effect of reducing the difference in the braking stop distance during the descending operation and stopping the braking at a safe stopping distance during both the ascending operation and the descending operation is obtained.

[Brief description of drawings]

FIG. 1 is a conceptual side view of a passenger conveyor showing an embodiment of a passenger conveyor braking device according to the present invention, FIG. 2 is an enlarged view of a portion II of FIG. 1, FIG. 3 is a conceptual plan view of FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, FIG. 5 is a logic circuit diagram corresponding to FIG. 1, and FIG. 6 is a diagram equivalent to FIG. 1 for explaining a conventional braking device for a passenger conveyor. 7 is an enlarged view of part VII of FIG. 6,
FIG. 8 is a conceptual plan view of FIG. (5) ... first brake, (5d) ... electromagnet, (6) ... second
Brake, (6g) ... electromagnet, (7) ... one-way operation mechanism,
(8) ... stop command means, (9) ... ascending operation detection means,
(10) ... Descent operation detecting means, (16) ... Control device The same parts or corresponding parts are denoted by the same reference numerals in the drawings.

Claims (1)

[Claims] 1. A first brake provided with an electromagnet for braking operation when the electromagnet is deenergized, and a one-way operating mechanism and an electromagnet are provided only in a descending direction when the electromagnet is deenergized. By the second brake that performs the braking operation, the ascending operation detecting means that detects and outputs the ascending operation, the descending operation detecting means that detects and outputs the descending operation, and the output of the ascending operation detecting means and the output of the stop command means. A braking device for a passenger conveyor comprising: a control device that deactivates the electromagnets of the first brake and deactivates the electromagnets of the first and second brakes by the outputs of the descending operation detection means and the stop command means. .