JP2005029288A - Handrail drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a handrail drive device capable of smoothly sending out moving handrail by a drive roller without vibrating a movable frame. <P>SOLUTION: This handrail drive device is provided with a driven roller 18 rotatably supporting a part of the moving handrail 4, the drive roller 19 arranged to oppose to the driven roller and mounted on the moving handrail, and the movable frame 20 rotatably fixing the drive roller and capable of moving in a direction of a straight line connecting centers of the drive roller and the driven roller. The handrail drive device is provided with a guide device, the guide device is retained by one of a main body frame and the movable frame and includes guide pins 23a, 23b, 23c extending in the straight line direction and guides 26a, 26b, 26c provided on another one of the main body frame and the movable frame and guiding movement of the movable frame in the straight line direction while engaging with the guide pins. The guide device is provided on at least two places in proximity of an end part of the movable frame in the straight line direction and in proximity of an end part in a direction perpendicular to the straight line direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a handrail drive device such as an escalator, and more particularly to a handrail drive device of a variable clamping force type.
[0002]
[Prior art]
A conventional handrail drive device with a variable clamping force in an escalator is rotatably fixed to a body frame, a driven roller that abuts on one surface of the moving handrail of the escalator and rolls and supports the moving handrail, and is opposed to the driven roller. A driving roller mounted on the other surface of the moving handrail, and a movable frame fixed to the driving roller so as to be rotatable and movable in a linear direction connecting the rotation center of the driving roller and the driven roller. One guide pin held on the main body frame so as to extend in the linear direction and a guide provided on the movable frame and engaged with the guide pin so that the movable frame moves only in the linear direction. And a pair of guides. (For example, refer to Patent Document 1).
[0003]
[Patent Document 1]
Japanese Examined Patent Publication No. 63-13910 (column 3, line 23-column 4, line 15, FIGS. 2-4)
[0004]
[Problems to be solved by the invention]
A conventional handrail drive device with variable clamping force in an escalator is configured as described above, and only one location near the central portion of the movable frame in the linear direction is constituted by one guide pin and a pair of guides engaged therewith. Since the movable frame may vibrate, the contact state between the driving roller and the moving handrail becomes unstable each time, and the moving handrail is smoothly sent out by the driving roller. There was a problem that it was impossible to do.
The present invention has been made to solve the above-described problems, and provides a handrail driving device that can smoothly move a moving handrail by a driving roller without vibrating a movable frame. With the goal.
[0005]
[Means for Solving the Problems]
A handrail drive device according to the present invention includes a plurality of steps that are disposed endlessly along a main body frame and circulate, a moving handrail disposed on the main body frame along the entire length of the steps, and one of the moving handrails. And a driven roller fixed to the main body frame, a driving roller placed opposite to the driven roller, and placed on the movable handrail, and the driving roller is rotatably fixed, and the driving roller A movable frame provided so as to move in a linear direction connecting the rotation center of the driven roller and the driven roller, a drive chain that engages with the drive roller and drives the drive roller at a speed synchronized with the movement of the step, and the main body A guide pin that is held on one of the frame and the movable frame and extends in the linear direction, and is provided on the other of the main body frame and the movable frame, and engages with the guide pin to move the movable frame in the linear direction. Guide the move That guide and with a guide device having, in which the guide device is provided in at least two positions of the end portion in a direction substantially perpendicular to the end portion and the linear direction of said linear direction of the movable frame.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view showing the overall configuration of the escalator, FIG. 2 shows the configuration of Embodiment 1 of the present invention, (a) is a front view, and (b) is a side view.
As shown in FIG. 1, an escalator to which this embodiment is applied spans a main body frame 1 between adjacent floors, and an appropriate number of balustrades 2 are disposed on both sides in the longitudinal direction of the main body frame 1. At the same time, a step 3 connected endlessly between the opposite balustrades 2 is circulated and arranged so that the moving handrail 4 circulates at the peripheral edge of the balustrade 2 at a speed synchronized with the step 3. Has been.
[0007]
The steps 3 are connected to each other by a step chain 7 wound between an upper step sprocket 5 and a lower step sprocket 6.
The drive sprocket 8 provided coaxially with the upper step sprocket 5 is driven by the drive device 10 through the drive chain 9, whereby the step chain 7 is driven and the step 3 circulates. The moving handrail 4 is driven by a handrail driving device 11 provided on the upper part of the main body frame 1. In addition, the transmission of power to the handrail drive device 11 is performed by integrally transmitting the power of the drive device 10 on the handrail drive sprocket 12, the power transmission chain 13, the idlers 14 and 15 provided coaxially with the drive sprocket 8. This is carried out via a handrail drive chain 17 engaged with the other sprocket via one sprocket of the double sprocket 16 to which two rotating sprockets are attached.
[0008]
2A and 2B are enlarged views showing the detailed configuration of the handrail drive device 11, wherein FIG. 2A is a front view and FIG. 2B is a side view. As shown in these drawings, a plurality of driven rollers 18 are rotatably fixed to the main body frame 1 and come into contact with the lower side surface of the moving handrail 4 so as to roll and support the moving handrail 4. Further, the plurality of drive rollers 19 provided to face the driven roller 18 are rotatable along one side (one side extending upward and leftward in FIG. 2a) of the movable frame 20 that is generally formed in a triangular shape. Each drive roller 19 is fixed and placed on the upper side surface of the moving handrail 4.
[0009]
Each driving roller 19 is provided with a driving roller sprocket 21 on the same axis, and the movable frame 20 has a triangular apex portion (a corner portion forming the lower end in FIG. 2a) facing one side to which the driving roller 19 is fixed. A double sprocket 16 is provided, an intermediate idler sprocket 22 is provided at an intermediate position of each drive roller 19 at an intermediate portion between the drive roller 19 and the double sprocket 16, and the other sprocket of the double sprocket 16 and the drive roller sprocket 21 are provided. A handrail drive chain 17 for transmitting power to the drive roller 19 is wound around the intermediate idler sprocket 22 as shown in the figure.
[0010]
As described above, the power transmission chain 13 is wound around one sprocket of the double sprocket 16, and the power from the drive device 10 is transmitted to the handrail drive chain 17 via the idlers 14 and 15.
The tension direction of the power transmission chain 13 is stretched so as to pull down the movable frame 20 in one direction in which gravity acts, that is, in a linear direction connecting the rotation centers of the driving roller 19 and the driven roller 18. The frame 1 can move only in the linear direction in which the tension of the power transmission chain 13 acts.
[0011]
Specifically, it is configured as described below. That is, two holding portions 24a, 25a, 24b, and 25b are provided in the vicinity of both ends of one side that fixes the driving roller 19 of the movable frame 20 that is substantially perpendicular to the linear direction, and the guide pins 23a, 23b is held, and the guide pins 23a and 23b extend in the linear direction. In addition, one end of the guide pin 23c is fixed so as to extend in the linear direction also at the triangular apex portion in the vicinity of the lower end portion of the movable frame 20 in the linear direction.
[0012]
Furthermore, guides 26a, 26b, and 26c that are inserted through the guide pins and slidable are respectively inserted into the portions of the main body frame 1 facing the holding portions of the guide pins 23a, 23b, and 23c of the movable frame 20. The movable frame 20 is guided so that it can move only in the linear direction.
[0013]
Next, the operation of this embodiment will be described.
The power from the drive device 10 is rotated via one hand sprocket 16 that is wound around another sprocket provided coaxially with this sprocket by rotating one sprocket of the double sprocket 16 via the power transmission chain 13. The drive roller sprocket 21 is rotated. As a result, the driving roller 19 provided integrally with the driving roller sprocket 21 is rotated, and the moving handrail 4 in contact with the driving roller 19 is driven. When the driving roller 19 drives the moving handrail 4, a frictional force is required. This is because the weight of the movable frame 20 and parts attached thereto and the tension of the power transmission chain 13 cause the movable frame 20 to move in the moving direction. The driving roller 19 presses the movable handrail 4 on the driven roller 18 to obtain a frictional force.
[0014]
When the floor height of the escalator increases and the traveling resistance of the moving handrail 4 increases, the tension of the handrail drive chain 17 increases to increase the transmission torque.
This increase in tension is transmitted to the double sprocket 16 and the tension of the power transmission chain 13 is also increased. As a result, the force with which the power transmission chain 13 pulls the movable frame 20 in the linear direction increases, and the pressing force of the drive roller 19 increases. For this reason, the pressing force of the driving roller 19 on the movable handrail 4 is automatically adjusted following the change in the running resistance of the movable handrail 4.
[0015]
In this case, the guide pins 23a, 23b, 23c for guiding the movable frame 20 in the linear direction and the guides 26a, 26b, 26c in the figure of the movable frame 20 are both ends of one side above, that is, a direction substantially perpendicular to the linear direction. Are provided at three locations near the both ends of the frame and at the lower triangular apex, that is, near the lower end in the linear direction, so that the movable frame 20 does not vibrate, and therefore the drive roller 19 and the moving handrail 4 are in contact with each other. Is stabilized, and the moving handrail is smoothly sent out by the driving roller.
[0016]
In this embodiment, the guide pins 23a, 23b, and 23c are held on the movable frame 20, and the guides 26a, 26b, and 26c are provided on the main body frame 1. A similar effect can be expected even if the body frame 1 is held and the guide is provided on the movable frame 20.
In this embodiment, the guide pins are provided at three locations. However, the guide pins and guides provided in the vicinity of both end portions of one side of the movable frame 20 to which the driving roller 19 is fixed are arranged at either one end portion. It is provided only in the vicinity, that is, either one of the guide pin 23a and the guide 26a or the guide pin 23b and the guide 26b is removed, and the guide pin 23c and the guide 26c at the lower end are guided at two locations. Similar effects can be expected.
[0017]
【The invention's effect】
A handrail drive device according to the present invention includes a plurality of steps that are disposed endlessly along a main body frame and circulate, a moving handrail disposed on the main body frame along the entire length of the steps, and one of the moving handrails. And a driven roller fixed to the main body frame, a driving roller placed opposite to the driven roller, and placed on the movable handrail, and the driving roller is rotatably fixed, and the driving roller A movable frame provided so as to move in a linear direction connecting the rotation center of the driven roller and the driven roller, a drive chain that engages with the drive roller and drives the drive roller at a speed synchronized with the movement of the step, and the main body A guide pin that is held on one of the frame and the movable frame and extends in the linear direction, and is provided on the other of the main body frame and the movable frame, and engages with the guide pin to move the movable frame in the linear direction. Guide the move Since the guide device is provided in at least two places near the end portion in the linear direction of the movable frame and in the vicinity of the end portion in the direction substantially orthogonal to the linear direction, Since the movable frame can be supported with high rigidity and the movable frame does not vibrate, the contact state between the driving roller and the moving handrail is stabilized, and the moving handrail is smoothly sent out by the driving roller.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing an overall configuration of an escalator.
2A and 2B are diagrams showing a configuration of Embodiment 1 of the present invention, in which FIG. 2A is a front view, and FIG. 2B is a side view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body frame, 4 Moving handrail, 11 Handrail drive device, 16 Double sprocket, 17 Handrail drive chain, 18 Driven roller, 19 Drive roller, 20 Movable frame, 21 Drive roller sprocket, 22 Intermediate idler sprocket, 23a, 23b, 23c Guide pins, 24a, 24b, 25a, 25b holding portions, 26a, 26b, 26c guides.

Claims (2)

A plurality of steps disposed endlessly along the main body frame and circulated, a moving handrail disposed on the main body frame along the entire length of the step, and a part of the moving handrail are supported by rolling. A driven roller fixed to a frame, a driving roller placed opposite to the driven roller and placed on the moving handrail, a straight line connecting the driving roller and the rotational center of the driven roller, rotatably fixing the driving roller A movable frame provided so as to be movable in a direction, engaged with the drive roller, and driven at a speed synchronized with the movement of the step, on a drive chain, on the main frame or on the movable frame A guide pin that is held and extends in the linear direction; and a guide that is provided on the other of the main body frame and the movable frame and that engages with the guide pin and guides the movement of the movable frame in the linear direction. apparatus Includes, handrail driving device, characterized in that the guide device is provided in at least two positions of the end portion in a direction substantially perpendicular to the end portion and the linear direction of said linear direction of the movable frame. A plurality of steps disposed endlessly along the main body frame and circulated, a moving handrail disposed on the main body frame along the entire length of the step, and a part of the moving handrail are supported by rolling. A driven roller fixed to a frame, a driving roller placed opposite to the driven roller and placed on the moving handrail, a straight line connecting the driving roller and the rotational center of the driven roller, rotatably fixing the driving roller A movable frame provided so as to be movable in a direction, engaged with the drive roller, and driven at a speed synchronized with the movement of the step, on a drive chain, on the main frame or on the movable frame A guide pin that is held and extends in the linear direction; and a guide that is provided on the other of the main body frame and the movable frame and that engages with the guide pin and guides the movement of the movable frame in the linear direction. apparatus Includes, handrail drive device being characterized in that respectively the guide device in the vicinity of both end portions of a direction substantially perpendicular to the end portion and the linear direction of said linear direction of the movable frame.

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