JP4441353B2 - How to replace moving handrails on passenger conveyors - Google Patents

Description

  The present invention relates to a method for replacing a moving handrail of a passenger conveyor that replaces an existing moving handrail (also referred to as a handrail) of a passenger conveyor such as an escalator or a moving sidewalk.

As shown in FIGS. 1 and 7, the passenger conveyor is equipped with an endless moving handrail 10 that is driven in synchronization with the endlessly connected treads 3, but the passenger conveyor is operated for a long period of time. Then, it is necessary to replace the moving handrail 10 damaged due to aging or the like with a new one. In such a case, conventionally, a technique of carrying an endless new moving handrail into the passenger conveyor installation site and replacing it is common.
That is, first, a straight-sized moving handrail is manufactured at a moving handrail manufacturing factory, and this is connected endlessly, and this endless new moving handrail is carried into the passenger conveyor installation site.
Then, after removing the existing moving handrail 10 at the passenger conveyor installation site, after removing the passenger conveyor components that become an obstacle to incorporating the endless new moving handrail, the installation work of this new moving handrail is performed. After the work is completed, the passenger conveyor components that have been removed are attached to their original positions, and the operation dimensions of these components are readjusted and operation check tests are performed to complete the replacement work of the old and new moving handrails. To do.
The passenger conveyor components that become obstacles when incorporating an endless new moving handrail are specifically the plurality of treads 3 and the inlet guards 40 provided at the entrances on the upper and lower floors. And an inlet guard safety switch (not shown) that stops operation of the passenger conveyor when a child puts a hand into the deck cover 41, the skirt guard 42, and the inlet guard 40 from the upper floor to the lower floor. And a skirt guard safety switch (not shown) that stops the operation of the passenger conveyor when a foreign object is strongly sandwiched between the skirt guard 42 and the tread 3 near the entrance / exit. In FIG. 7, 43 is an inner plate, 44 is a deck board, and 45 is a landing plate.

  As described above, in the conventional method for replacing a moving handrail of a passenger conveyor, when incorporating an endless new moving handrail, a large number of passenger conveyor components such as a plurality of treads 3 are removed and then reattached. Since re-adjustment and operation confirmation tests have to be carried out, many of these complicated field work accompanying the replacement work of the old and new moving handrails has inevitably reduced work efficiency and work time.

  Therefore, after cutting the existing moving handrail in the vicinity of the entrance / exit, temporarily connecting one end of the cut existing moving handrail to one end of a new moving handrail whose both ends are not connected, and then pulling the existing moving handrail from the other end side. By pulling out the existing moving handrail from within the pedestal of the passenger conveyor, the new moving handrail is fed into the pedestal, and a part temporarily connected to the existing moving handrail at the one end of the new moving handrail A method has been proposed in which if the temporary connection is pulled out after passing through the gantry, both ends of the newly installed handrail are connected to make them endless (see, for example, Patent Document 1).

JP 2000-86137 A

  However, in the thing of the said patent document 1, the other drum which takes in the thing of the form which wound the new moving handrail around the drum at the factory, and winds up the existing moving handrail was required. Furthermore, a clamping drive device for feeding the moving handrail into the gantry is also necessary, and there is a disadvantage that the equipment for replacement becomes large.

  The present invention has been made in view of the problems of the prior art. The purpose of the present invention is to eliminate the need to remove many passenger conveyor components when replacing old and new moving handrails. It is an object of the present invention to provide a method for replacing a moving handrail of a passenger conveyor that can improve the work efficiency on the site and shorten the work time, for example, a driving device is unnecessary and only one drum of the moving handrail is required.

The moving handrail connecting device for a passenger conveyor according to the present invention has an endless existing moving handrail that is driven in synchronism with an endlessly connected tread by driving means installed in a gantry near the entrance / exit When replacing with a new moving handrail wound in a flat winding around the drum, the existing moving handrail is cut in the vicinity of the entrance and exit, and one end of the cut existing moving handrail is temporarily connected to one end of the new moving handrail that is not connected at both ends. After the connection, the new moving handrail is pulled by pulling the other end of the existing moving handrail from inside the gantry by pulling the existing moving handrail installed in the gantry and driven by the driving means. Is pulled out from the lower side of the drum and fed into the gantry, and at the same time, the other end of the existing moving handrail is pulled out through the gantry and the new moving handrail of the drum is drawn out, and then wound from the upper side of the drum Unishi Te wound in a flat-wound, after dismantling the temporary connection part which endlessly by connecting both ends of the new moving handrail.

  According to the present invention, if one end of the new moving handrail and one end of the existing moving handrail are temporarily connected and the existing moving handrail is pulled out from the gantry, the new moving handrail is sent into the gantry. Since the old and new moving handrails can be replaced with minimal removal of the components, the field work can be completed efficiently and in a short time.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the moving handrail replacement method for a passenger conveyor according to the present invention will be described with reference to FIGS.
FIG. 1 is a side view of a passenger conveyor showing a state in the middle of a moving handrail replacement operation in Embodiment 1 of the present invention. As shown in the figure, the passenger conveyor is installed in the upper truss 1A, and the gantry 1 that is framed with a shape steel or the like so as to support all the components and includes the upper truss 1A, the middle truss 1C, and the lower truss 1B. The driving machine 4 and the upper treadle chain gear 5; the lower treadle chain gear 8 installed in the lower truss 1B; and the treadle 3 connected endlessly and driven by the driving machine 4 and the upper treadle chain gear 5; A pinching-type moving handrail drive device 6 installed in the gantry 1 and driven by the driving machine 4 and the upper treadle chain gear 5, and an endless existing moving handrail 10 driven by the pinching-type moving handrail drive device 6; Is generally configured.

The driving machine 4 drives the upper treadle chain gear 5 via a drive chain 4A. The upper treadle chain gear 5 drives the tread 3 via a step link 5A and also via a moving handrail drive chain 11. Thus, the pinching type movable handrail driving device 6 is driven.
The pinching type moving handrail drive device 6 is configured such that a driving roller 110 that drives the moving handrail 10 and a pressure roller 111 are driven by pressing the moving handrail 10 on the return path side. The driving roller 110 is wound around the roller 112 by a chain 113. The roller 112 is driven from the upper treadle chain gear 5 by the chain 111.
These step board 3 and the existing moving handrail 10 move in synchronization.

  When such a passenger conveyor is operated for a long period of time, the existing moving handrail 10 is damaged due to deterioration over time. That is, when the existing moving handrail 10 is used for many years, damage such as a break of the canvas due to wear of the slide cloth 10C shown in FIG. 3 is likely to occur. Further, as another reason, the surface of the decorative layer 10F is often replaced because it is dirty. Then, when it becomes necessary to replace the existing moving handrail 10 with a new one, in the first embodiment, the old and new moving handrails are replaced by the following procedure.

First, terminal processing at a factory will be described.
FIG. 3 is a perspective view showing the terminals of the old and new moving handrails 10 and 20. In the moving handrail 10 (20), a C-shaped innermost slide cloth 10C (20C) is covered with a core body layer 10D (20D) made of a thermoplastic elastomer, and the inside of the core body layer 10D (20D). A tensile body 10E (20E) made of a metal tape or the like is embedded in the inside. The outermost exterior of the moving handrail 10 (20) is covered with a decorative layer 10F (20F) made of a thermoplastic elastomer colored in a customer specification color.
The terminal of the new moving handrail 20 is processed as shown in FIG. 3, and a temporary connection hole 20G is formed in advance at the tip of a tensile body 20E made of a metal tape or the like.

Next, the moving handrail replacement method in the field is demonstrated using FIG.
First, a cutting step of cutting the existing moving handrail 10 at the entrance on the upper floor is performed, and then, one end portion 10A on the return path among the both ends of the existing moving handrail 10 generated by this cutting is replaced with a new moving handrail. 20 is temporarily connected to one end 20A of the connector 20 using a connection fitting 20B. The new moving handrail 20 is previously wound around and stored in the drum 30 installed in the vicinity of the entrance on the upper floor, and is pulled out from the lower side in FIG. Further, the other end portion 10B of the existing moving handrail 10 opposite to the side temporarily connected to the new moving handrail 20 is wound so as to be wound after the new moving handrail 20A on the same drum 30 is drawn out. Turned.
The new moving handrail 20 is wound around the drum 30 in a flat winding. Since the drum 30 is a flat winding, the width L is larger than that of the lap winding, but it is sufficiently practical.
If it does in this way, since the existing moving handrail 10 will be wound around the drum 30 which let out the new moving handrail 20, it will be sufficient to have one drum 30. At this time, an alignment device 50 described later is used so that the existing moving handrail 10 is wound around the drum 30 flatly.

  Next, a method for connecting the old and new moving handrails 10 and 20 will be described. One end portion 10A of the cutting portion of the existing moving handrail 10 is provided with a temporary connection hole 10G on the site so that the connection fitting 20B of the new moving handrail 20 is attached. Since the new moving handrail 20 that has been terminal-processed in advance in the factory has already been drilled with a hole 20G for temporary connection fitting, one end portion 10A of the existing moving handrail 10 and one end portion 20A of the new moving handrail 20 are connected. Temporarily connect with the metal fitting 20B. The connection fitting 20B may be a type in which a flat plate is fastened with a bolt or a bind wire.

  Next, a moving handrail pulling process is performed, and the existing moving handrail 10 is pulled by the pinching type moving handrail driving device 6 and wound around the drum 30, so that the existing moving handrail 10 in the gantry 1 is moved on and off the upper floor. While pulling out to the mouth, the new moving handrail 20 is sent from the entrance / exit on the upper floor into the frame 1 and incorporated. In the first embodiment, such a drawing operation is performed using the pinching type moving handrail drive device 6 of the passenger conveyor body. That is, a pulling force is required to pull the existing moving handrail 10 out of the gantry 1, but in the present invention, the old and new moving handrails 10 and 20 are fed and retracted using the pinching type moving handrail driving device 6 of the passenger conveyor body. It can be carried out.

FIG. 4 shows a passenger conveyor control device that controls the electric motor of the passenger conveyor drive 4.
4, U, V, and W are three-phase AC power supplies, 100 is a converter composed of a diode 101, 102 is an inverter composed of a transistor 103, 104 is a capacitor, 105 is a regenerative power consumption resistor, and 106 is a regenerative power. A power control transistor 107 is a control circuit and incorporates a microcomputer (not shown). Reference numeral 108 denotes a current sensor, R, S, and T are three-phase alternating currents output from the inverter 102, and are fed to the driving induction motor 109.
As is well known, FIG. 4 shows a configuration of a so-called variable voltage variable frequency (VVVF) control device, and the speed of the induction motor 109 is arbitrarily changed by changing the voltage and frequency of the three-phase AC R, S, T. sell.

  In the passenger conveyor according to the first embodiment of the present invention, this variable voltage variable frequency control is used for, for example, so-called slow starting that starts slowly at the time of starting, or to increase the transportation capacity by increasing the speed of the passenger conveyor at the time of congestion. ing. It is necessary to pay particular attention when exchanging the moving handrail, and the moving handrail retraction speed needs to be lower than that during normal operation. Although not shown, if the speed command value of the control circuit 107 is lowered, the rotational speed of the drive motor 109 is arbitrarily lowered.

  The moving handrail pulling-out process will be described in more detail. When the new moving handrail 20 passes through the pinching-type moving handrail driving device 6, the connecting portion 20B of the old and new moving handrails 10 and 20 is caught and the traction force increases to a predetermined value or more. It is necessary to quickly stop the moving handrail drawing work. The current sensor 108 in FIG. 4 feeds back the current flowing through the induction motor 109 to the control circuit 107, the microcomputer of the control circuit 107 calculates the torque of the motor 109, and stops the motor 109 when it exceeds a predetermined value. is there.

FIG. 5 shows a passenger conveyor controller for exchanging moving handrails that can be applied to a passenger conveyor controller that does not use variable voltage variable frequency control.
In FIG. 5, when moving handrails are replaced, terminals A and B are disconnected during normal use. Instead, a temporary speed control device 200 is connected between terminals A and B to adjust the speed of the passenger conveyor. Is. The temporary speed control device 200 may be a variable voltage variable frequency (VVVF) control device or a primary voltage control device using a thyristor.
The power supply capacity of the temporary speed control device 200 in this case is only required to be a very small capacity since it only needs to drive the torque for feeding the moving handrail and the unloaded passenger conveyor.
When the drive unit 4 is started in this way, the pinching type moving handrail drive device 6 is activated accordingly, and the existing moving handrail 10 is wound around the drum 30 in a flat manner. The newly moved handrail 20 is fed into the gantry 1 from the moving handrail entrance at the entrance on the upper floor.

FIG. 6 shows the structure of the aligning device 50 for winding the other end portion 10B of the existing moving handrail 10 drawn out from the passenger conveyor into the drum 30 in a flat winding.
In FIG. 6, 51 is a rod screw arranged parallel to the central axis of the drum 30, 52a and 52b are drive members in which a female screw driven by the rotation of the rod screw 51 is cut, and 53 is a drum 30 side. The round bars 54 a and 54 b arranged so as to be parallel to the bar screw 51 are sliders that can move along the round bar 53 by holes drilled therein. The driving member 52a and the slider 54a are connected by a connecting portion 55a, and the driving member 52b and the slider 54b are similarly connected by a connecting portion 55b. The left and right end portions of the bar screw 51 are rotatably attached to mounting bases 56a and 56b, and a handle 57 is attached to the left end portion thereof. The round bar 53 is fixed to the mounting bases 56a and 56b. When the handle 57 is turned, the drive members 52a and 52b move left and right at the same interval according to the rotation of the bar screw 51. The distance between the drive members 52a and 52b is slightly wider than the width of the existing moving handrail 10.
In order to wind the existing moving handrail 10 pulled out from the passenger conveyor into the drum 30 in a flat roll, the handle 57 is appropriately rotated in accordance with the drawing speed of the existing moving handrail 10. Then, if the new moving handrail 20 passes through the gantry 1 and is drawn out for the entire circumference via the entrance on the lower floor, one end 20A of the new moving handrail 20 and one end 10A of the existing moving handrail 10 After the temporary connection of the temporary connection portion 20B is disassembled, both ends of the new moving handrail 20 are connected and molded by a known method to make it endless.

  Molding is performed in a heating and pressure kettle, and after molding, the newly installed moving handrail 20 is incorporated into a moving handrail guide (not shown), and finally the drum 30 is carried out and the removed deck cover 41 and the like are restored to the original. Attach to the position, and the handrail replacement work is completed.

  In the first embodiment described above, the existing moving handrail 10 has been described as being cut in the vicinity of the entrance on the upper floor, but it is needless to say that it may be cut in the vicinity of the entrance on the lower floor.

The method for replacing the handrail of a passenger conveyor according to the present invention is carried out in the form as described above, and has the following effects.
Use the moving handrail connection method of the passenger conveyor to temporarily connect one end of the new moving handrail and one end of the existing moving handrail so that when the existing moving handrail is pulled out of the frame, the new moving handrail is sent into the frame. The existing passenger conveyor pinch type moving handrail drive device is used for the handrail drawer, so there is no need to bring in a new drive mechanism when replacing the handrail, and if the passenger conveyor is variable speed, the pinch type mobile handrail drive device can be installed at a low speed. Control and safely carry new moving handrails, and if the passenger conveyor is not variable speed, a small variable temporary variable speed control device is temporarily connected to the passenger conveyor power supply side to make it low speed, so it is safe and easy The moving handrail can be exchanged.
In the above description, the old and new handrails are retracted and delivered using the pinching type moving handrail driving device, but can also be implemented manually.
In addition, since the existing moving handrail is wound around the drum around which the new moving handrail is wound, the amount of material to be carried to the site is reduced, and the on-site work can be completed efficiently and in a short time.

It is a side view of a passenger conveyor which shows the state in the middle of the moving handrail replacement work in Embodiment 1 of this invention. It is a perspective view which shows the moving handrail replacement | exchange method of a passenger conveyor in Embodiment 1 of this invention. It is a perspective view which shows the terminal structure of the moving handrail of a passenger conveyor in Embodiment 1 of this invention. It is a circuit diagram which shows the control apparatus of the passenger conveyor which controls the drive motor of the passenger conveyor in Embodiment 1 of this invention. It is a circuit diagram which shows the control apparatus of the passenger conveyor for moving handrail exchange which can be applied also to the control apparatus of the passenger conveyor which does not use variable voltage variable frequency control. It is a top view which shows the structure of the aligning device for winding the existing moving handrail pulled out from the passenger conveyor in Embodiment 1 of this invention around a drum in flat winding. It is a perspective view which shows partially the external appearance structure of a general passenger conveyor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stand 1A Upper truss 1B Lower truss 1C Middle truss 3 Step board 4 Drive machine 4A Drive chain 5 Upper step board chain gear 5A Step link 6 Clamping-type moving handrail drive device 8 Lower stepboard chain gear 10 Existing moving handrail 10A Return side of existing moving handrail One end portion 10B The other end portion 10C, 20C opposite to the temporary connection side of the existing moving handrail 10C, 20C The moving cloth of the handrail 10D, 20D The core layer 10E, 20E of the moving handrail Tensile body (metal tape)
10F, 20F Moving handrail decorative layer 10G, 20G Temporary connection hole for moving handrail 11 Moving handrail drive chain 20 New moving handrail
20A One end portion of a new moving handrail 20B Connection fitting 30 Drum 50 Alignment device 51 Bar screw 52a, 52b Drive member 53 Round bar 54a, 54b Slider 55a, 55b Connection portion 56a, 56b Mounting base 57 Handle 100 Converter 101 Diode 102 Inverter 103 Transistor DESCRIPTION OF SYMBOLS 104 Capacitor 105 Resistor for regenerative power consumption 106 Regenerative power control transistor 107 Control circuit 108 Current sensor 109 Induction motor 110 for driving 110 Driving roller 111 Pressing roller 112 Roller 113 Chain 200 Temporary speed control device

Claims (7)

A new moving handrail that is wound around a drum installed near the entrance of the endless existing handrail that is driven in synchronism with the treads connected endlessly by driving means installed in the gantry. When replacing, the existing moving handrail is cut in the vicinity of the entrance and exit, and after temporarily connecting one end of the cut existing moving handrail to one end of the new moving handrail that is not connected at both ends, the existing moving handrail is by withdrawing the other end of the existing mobile handrail from within the gantry to lead the existing clamping pressure moving handrail driving device installed in the gantry is driven by the drive means, the said new mobile handrail which is flat wound pull the lower side of the drum of the drum and the other end of the same time the existing mobile handrail when fed into the said cradle after the new moving handrail of the drum is pulled out through the inside of the frame is fed So as to be caught from the side wound on a flat winding, the after dismantling the temporary connection portion, the moving handrail replacement method of a passenger conveyor, characterized in that the new ends of the moving handrail connect to endless. Prior to the step of temporarily connecting one end of the cut existing moving handrail to one end of a new moving handrail that is not connected at both ends, both ends of the new moving handrail are processed at the factory, eliminating the need for on-site processing. handrail replacement method of claim 1 Symbol placement of the passenger conveyor. 3. A moving handrail for a passenger conveyor according to claim 2 , wherein a hole for attaching a connecting tool to an existing moving handrail is processed in advance in a tensile body made of a metal tape at one end of a new moving handrail to be temporarily connected. Replacement method. When handrail replacement, moving handrail replacement method of a passenger conveyor according to claim 1, wherein the moving handrail renormalization rate characterized by lower than during normal operation of the existing clamping pressure moving handrail driving device. 5. The method for replacing the handrail of a passenger conveyor according to claim 4 , wherein a temporary speed control device is separately connected to control the drive motor of the passenger conveyor when the handrail is replaced. A new moving handrail is pre-wound around a feeding drum of a new moving handrail installed outside the gantry, one end of which is temporarily connected to the existing moving handrail in the temporary connection step, and the new moving handrail is connected to the new moving handrail. In the moving handrail pull-out step, the moving handrail on the side opposite to the temporarily connected side is filled in the drum in the moving handrail drawing process so that the empty space created by the new moving handrail feeding drum installed outside the mount is filled. handrail replacement method of claim 1, wherein the passenger conveyor, characterized in that going winding the remaining portions of the existing mobile handrail.   7. The method for replacing a moving handrail of a passenger conveyor according to claim 6, further comprising an aligning device for allowing the existing moving handrail to be wound around the drum.

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