JPH0155194B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a braking device for braking passenger conveyors such as escalators and moving passages.

[Prior Art] As is well known, a passenger conveyor has a plurality of treads connected adjacently in an endless manner for movement. One of the methods for driving this endless tread group is called a link drive method. This is disclosed, for example, in Japanese Patent Application Laid-Open No. 53-71488, and the details will be described later, but the outline will be explained with reference to FIG.

In the figure, 1 is a truss that forms the skeleton of the passenger conveyor, 2 is a treadle, 3 is a drive roller attached to both ends of a tread shaft (not shown) fixed to the treadle 2, and 4 is a drive roller that connects the tread shafts. A connecting body such as a link formed in an endless shape and arranged within the truss 1,
5 is a drive chain gear driven by an electric motor (not shown) installed in the truss 1; 6 is the truss 1;
7 is a drive chain that is wound around the drive chain gear 5 and the driven chain gear 6 and engages with the inside of the connecting body 4 to drive it; 8 is a drive chain installed in the truss 1;
A handrail 9 fixed to and erected on both sides of the footboard 2 is a movable handrail that moves around the outer circumference of the handrail 8 in synchronization with the footboard 2.

The electric motor is provided with a well-known electromagnetic brake, and the electric motor is restrained by the electromagnetic brake while the footboard 2 is stopped. When a start command is given, the electromagnetic brake releases the electric motor, the electric motor is supplied with electricity, and the drive chain 7 is driven via the drive chain gear 5. The connecting body 4 is now driven, and the footboard 2 and the moving handrail 9 are moved. When a stop command is issued, power supply to the electric motor is cut off, and an electromagnetic brake is applied to apply braking force, so that the connecting body 4 is stopped, and the step board 2 and the moving handrail 9 are also stopped.

However, in the event of an abnormality such as when the drive chain 7 breaks (particularly both left and right breaks) or the shaft (not shown) of the drive chain gear 5 breaks, the footboard 2 will be stopped even if the electromagnetic brake is activated. It is impossible to stop it and it becomes dangerous. Also,
If the connecting body 4 were to break, a large number of footboards 2 would flow into the lower part, which is also dangerous.

Therefore, as shown in Japanese Patent Publication No. 36-8767, for example, the weight part of the stopper, which is rotatably supported on a shaft fixed to the truss side, is provided on a tension band and supported on a receiving metal fitting. , an auxiliary brake device in which the tension band is tensioned along the longitudinal direction of the passenger conveyor and a spring for adjusting the tension of the connecting body is connected to one end of the tension band to stop the footboard when the connecting body is broken. Are known. In the auxiliary brake device, when the connecting body is broken, the tension band moves under the tension of the spring, and the stopper is detached from the receiving fitting due to the movement of the receiving fitting due to this movement, and the weight portion is moved. The stopper stands up due to the gravity of the truss, and the weight part is locked to a stopper provided on the truss.In this state, the stopper supports the tread shaft and stops the tread group.

[Problems to be Solved by the Invention] The auxiliary brake device of the conventional passenger conveyor braking device configured as described above applies braking to the group of tread plates by supporting the tread shaft by the stopper. Unless the shaft is changed to one with greater strength than one without an auxiliary brake device, it will not be able to support the large load when the connecting body breaks, resulting in high costs.

This invention was made to solve the above-mentioned problems, and when an abnormality occurs, by directly holding the connecting body on the movable body, it is possible to eliminate the need to improve the passenger conveyor members such as the tread shaft. The object of the present invention is to provide a braking device for a passenger conveyor that can be easily provided at low cost.

[Means for Solving the Problems] A braking device for a passenger conveyor according to the present invention has a movable body, is activated when an abnormality is detected, and is auxiliary to engage and hold the connecting body by the movable body. It is equipped with a brake device.

[Function] The auxiliary brake device of the passenger conveyor braking device according to the present invention stops the treadle by having the movable body directly engage and hold the connecting body when an abnormality such as a breakage of the drive chain or the connecting body occurs. Since the above-mentioned connecting body originally has a large strength that can withstand the load of the tread group, it is only necessary to add an auxiliary brake device to prevent the flow from flowing to the bottom of the tread group, and the passenger No modification of conveyor components is required.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3.

In FIGS. 2 and 3, 1a is a support arm fixed to the truss 1, 2a is a frame fixed to the lower surface of the footboard 2, and 3 and 10 are attached to the front and rear ends of the frame 2a, respectively. A drive roller and a follower roller are attached to a fixed tread shaft (not shown) and guided by rails (not shown), and 11 is an auxiliary brake device attached to the support 1a. It consists of the following parts. 12
13 is a brake arm formed in a substantially Z-shape, the lower end of which is fixed to the support arm 1a, and the upper end facing the side surface of the connecting body 4; 13 is formed symmetrically with the brake arm 12; the brake arm 12 and pin 14; 15 is a brake arm which is a movable body whose central part is pivotally mounted; 15 is a brake shoe fixed to the inside of the upper end of the brake arms 12 and 13, and faces both sides of the connecting body 4 with a gap in between; 16 is a brake; A push spring 17 is inserted between the lower ends of the arms 12 and 13, and 17 is the brake arm 1.
An operating rod 19 loosely passes through the lower ends of the brake arm 13 and has a nut screwed into its tip. Reference numeral 19 is a brake coil that is fixed to the lower end of the brake arm 13 and attracts the operating rod 17 when energized. Note that this embodiment is attached to the escalator shown in FIG.

Next, the operation of this embodiment will be explained. During normal escalator operation, brake coil 1
9 is deenergized, the upper ends of the brake arms 12 and 13 are opened by the force of the push spring 16, and a gap is created between the brake shoe 15 and the side surface of the connecting body 4. Therefore, there is no problem in the movement of the connecting body 4.

If the drive chain 7, the shaft of the drive chain gear 5, the connecting body 4
When a break in the brake pedal 2 is detected, or when an abnormal increase in the speed of the footboard 2 is detected (the detection device is not shown in either case), the brake coil 19 is energized. As a result, the actuating rod 17 is attracted and the brake arm 13, which is a movable body, rotates around the pin 14, so the brake shoe 15 pinches the side of the connecting body 4 from both sides, giving the connecting body 4 a braking force. give,
Stop the treadle 2.

The installation position of the auxiliary brake device 11 is not particularly limited, but it is desirable to install it as far down as possible. This is because, by installing it below, even if the universal assembly 4 breaks, it is possible to prevent it from flowing into the lower part of the treadboard 2 group.

In the above embodiment, the auxiliary brake device 11 applies braking force to the side surface of the coupling body 4, but in the present invention, a groove (not shown) is provided on the surface of the coupling body 4 facing the drive chain 7. Since these grooves and the drive chain 7 are designed to engage with each other, the movable body of the auxiliary brake device may engage and hold the grooves to apply braking force to the coupling body. .

As explained above, the present invention is provided with an auxiliary brake device having a movable body in addition to the normal brake device of the passenger conveyor, and the movable body of the auxiliary brake device is Since the treadle is stopped by engaging and holding the connecting body that connects the treadboard with the treadle, the treadle shaft of the passenger conveyor, etc. By simply adding an auxiliary brake device without changing any of the components,
This has the effect of being able to prevent the risk of the treadle moving downwards, and therefore being able to be provided easily and at low cost.

[Brief explanation of drawings]

FIG. 1 is a schematic side sectional view of a passenger conveyor, FIG. 2 is a diagram showing an embodiment of a braking device for a passenger conveyor according to the present invention, and FIG. FIG. 2...Treadboard, 4...Connection body, 5...Drive chain gear, 7...Driving differential, 11...Auxiliary brake device,
13... Brake arm (movable body). In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. Adjacent treadboards are connected by a connecting body to form an endless treadboard group, and the connecting body is driven by an electric motor, and when an abnormality is detected, a braking force is applied to the electric motor by a brake device. A braking device for a conveyor, comprising an auxiliary braking device that has a movable body, is activated when the abnormality is detected, and engages and holds the connecting body by the movable body. Braking device.