JPS63143191A - Moving-handrail speed detector for escalator or moving walk - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a system for generating an alarm when a speed difference occurs between steps and a moving handrail that move in synchronization on an escalator or a moving walkway. The present invention relates to a speed detection device that detects the speed of a moving handrail for the purpose of preventing danger by starting the movement or stopping the operation.

(Prior art) Generally, as shown in Fig. 7, an escalator is provided with a truss 1 that spans the upper and lower floors of a building, and a step chain drive sprocket 2 and a driven sprocket 3 are arranged on the sides of the upper and lower floors. A step chain 4 is wound around these sprockets 2.3, and a large number of steps 5 are attached to this and arranged in an endless manner along a guide rail 6. Then, the rotational force of the motor 8 of the electric drive device 7 installed on the upper floor side of the truss 1 is transmitted to the drive large sprocket 1 via the drive chain 9.
0 and rotates the step chain drive sprocket 2, which is coaxial with this sprocket, so that the step 5 is rotationally driven together with the step chain 4.

In addition, a handrail 11 is erected on the left and right sides of the step 5, and an endless moving element 12 is provided extending from the outer periphery of the handrail 11 to the inside of the lower part of the handrail 12. A handrail drive device 13 is provided in the middle of the return path. This handrail drive device 13 is provided with an interlocking sprocket 16 which is interlocked with a small drive sprocket 14 coaxially with the large drive sprocket 10 of the electric drive device 8 via an interlocking chain 15, and a handrail drive wheel 17 coaxially with this. As shown in an enlarged view in FIG. 8, a large number of movable handrails 12 are wound around the circumferential surface of the handrail drive wheel 17 via idle rollers 18, and the rotation of the handrail drive wheel 17 is **The slider slide 12 is rotationally driven by force.

In addition to the drive method described above, there is also a handrail drive mechanism 13' shown in FIG. Similarly to the above, a plurality of small interlocking sprockets 16' are provided in conjunction with the small drive sprocket 14 of the electric drive device 7 that rotationally drives the steps 5 via a motion chain 15, and a small diameter handrail drive is provided coaxially with these sprockets. The wheels 17' are arranged in a row, and the driven wheels 19 are arranged in a row facing each other so as to sandwich the movable handrail 12 between the handrail driving wheels 17', and each of the driven wheels 19 is connected to a pressing spring 20. With a configuration that allows more pressure,
The spring force squeezes the movable handrail 12 between each handrail drive wheel 17' and the driven wheel 19, and in this state, the movable handrail 12 is rotationally driven by the rotation rFi friction force of the prosthetic handrail drive wheel 17'. That's what I do.

In both cases of FIG. 7 and FIG. 9, the step 5 is rotationally driven by an electric drive device [7], and the movable handrail 12 is driven by a handrail drive mechanism 13 or 13' linked to the drive device 7. By rotating in synchronization with the step 5 in the same direction, passengers can be carried safely.

Here, since the electric drive device 17 of the step 5 rotates the step 5 by transmitting power through engagement between the subrouge and the chain, a constant moving speed of the step 5 can be ensured.

However, the moving handrail drive mechanism 13 or 13' is chain-linked with the electric drive mechanism [7 of the step 5], but the rotation of the handrail drive wheel 17 and 17' that ultimately rolls into contact with the moving handrail 12 is The slider slide 12 is rotationally driven by the frictional force. For this reason, if the *m force between the movable handrail 12 and the handrail drive wheel 17 or 17', the mutual winding changes due to changes in force, clamping force, and the presence or absence of moisture, etc. The driving force for the movable handrail 12 changes accordingly, and the moving speed of the movable handrail 12 may change depending on the balance with this running resistance.

In such a case, the steps 5 and the moving handrail 12, which should originally move in synchronization and at the same speed, will move at different speeds and become misaligned, resulting in the passenger's posture becoming unstable and causing him or her to fall. There is a risk of

Therefore, in order to avoid such danger,
As proposed in Publication No. 135084 etc., the step 5
The moving speed of the handrail 12 and the moving handrail 12 are detected, and the rain detection speeds are compared. If there is a difference between the two speeds, an alarm is issued or the operation of the escalator is stopped. It is necessary to take safety measures to
A speed detection device that accurately detects the movement speed of the handrail 12 and the moving handrail 12 is required.

In the later proposal, as shown in FIGS. 7 and 8, a speed detector 21 which is rotated in rolling contact with the handrail drive wheel 17 is provided as a step speed detection device, and as a step speed detection device. A speed detector 22 is provided facing the guide roller 18 and the movable handrail 12 with the movable handrail 12 in between, and rolls into contact with the inner canvas surface of the movable handrail 12 to follow the rotation. A tachogenator is directly connected to each of the detectors 21 and 22, and a voltage corresponding to the rotational speed of both detectors 21 and 22 is generated by the tachogenator to directly detect the moving speed of the steps 5 and the moving handrail 12. Then, the detected values of both are input as signals to a comparison circuit (not shown) for comparison.
If a difference occurs, a warning is issued or the escalator is stopped.

Although not shown, a moving walkway is also substantially similar to the escalator described above.

(Problems to be Solved by the Invention) By the way, in the above-mentioned conventional moving handrail speed detection device, the same problem occurs in the step speed detection device.
Since the tachogenerator is directly connected to the speed detector 22 in order to directly detect the moving speed of the moving handrail 12, the moment of inertia of the speed detector 22 increases accordingly, making it difficult to rotate and stop, making it difficult for the moving handrail to move. The tracking performance is not good for the speed change of 12.

Furthermore, since there is only a simple guide roller 18 on the opposite side of the moving handrail 12 that the speed detector 22 contacts,
If the degree of clamping is insufficient and the movable handrail 12 passing therethrough is curved, sufficient contact between the speed detector 22 and the movable handrail 12 cannot be maintained at that portion.

Historically, the inner surface of the moving handrail 12 with which the speed detector 22 makes contact is made of a canvas layer, which has a lower coefficient of friction than the outer decorative surface made of rubber or the like of the moving element 12 and prevents rainwater from penetrating. As a result, the rJ friction coefficient further decreases, and since it takes time for rainwater, etc. that has soaked in to dry and return to the original friction coefficient, the speed detector 22 detects the movement of the moving handrail 12.
It is easy to slip and cannot follow the rotation accurately.

For the above reasons, the performance of the conventional moving handrail speed detection device is not very good, and the speed detector 22 is
Since it is not always possible to accurately follow and rotate the speed change in step 2, there is a problem in that accurate speed detection cannot be performed. Furthermore, for safety reasons, it is not possible to accurately compare the moving speed of the handrail 12 and the moving speed of the steps 5, and the speed difference resulting from the comparison is not suitable for issuing a warning to notify of danger or stopping the operation. There was a risk that it would lack accuracy.

In addition, since the speed detector 22 is relatively large and has a configuration in which the tacho generator is directly connected to it, it is quite difficult to install it inside the narrow escalator, and maintenance and inspection are difficult. There were also problems.

The present invention was developed in view of the above circumstances, and it is possible to accurately follow the speed change of the moving handrail of an escalator or a moving walkway, to always correctly detect the moving speed, and to detect the speed difference between the moving handrail and the steps. This is a high-performance device that is very useful for accurately understanding the situation and taking safety measures.It is also easy to configure, compact, and easy to install and maintain. The purpose is to provide.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, the moving handrail speed detection device for an escalator or a moving walkway of the present invention detects the speed of a moving handrail in the middle of the return path of the moving handrail inside the lower side of the parapet. an outer roller that is rotatably provided in a state where it rolls into contact with the outer decorative surface of the slider rail, and an inner roller that is rotatably provided on the opposite side of the outer roller with the slider rail in between. An inner roller that rolls into contact with the side surface, a pressing mechanism that constantly presses the inner roller against the inner surface of the moving handrail so that the inner and outer rollers pinch the moving handrail, and a mechanism that presses the inner roller against the inner surface of the moving handrail at all times, and a mechanism that presses the inner roller in a circumferential direction around the outer roller. A plurality of actuating pieces are arranged at equal intervals and rotate together with the outer roller, and each actuating piece is installed in the vicinity of the outer roller and rotates together with the outer roller. and a non-contact detector that outputs a pulse signal according to the moving speed of the handrail.

(Function) With the above configuration, in the slider PS speed detection device of the present invention, the outer roller is pressed against the outer decorative surface of the slider rail in a state where the moving handrail is pinched between the inner roller and the inner roller which is pressed by the pressing mechanism. A plurality of actuating pieces are arranged around the outer O-roller at equal intervals in the circumferential direction, and are arranged in the vicinity of the outer roller. A non-contact detector detects this and outputs a pulse signal according to the moving speed of the handrail.

At that time, by using a non-contact detector, the outer roller could be placed on the periphery. ! Since it only requires a few operating pieces and does not have to be directly connected to something like a tacho generator as in the past, the moment of inertia is small and the ability to follow changes in the speed of the moving handrail is good. Further, since the outer roller pinches the moving handrail between the inner roller pressed by the pressing mechanism, sufficient contact can always be maintained even if the moving handrail is bent or loosened. Moreover, since the outer roller rolls into contact with the outer decorative surface, which has a larger coefficient of friction than the inner surface of the moving handrail, sufficient rotational frictional force is obtained between it and the moving handrail, further improving followability. , its outer decorative surface has the property of repelling water, and even if it gets wet, it quickly drains the water, so it is less likely to cause a decrease in the rfJE (coefficient) and the outer roller will not slip. , the outer roller always accurately follows and rotates to follow the speed change of the moving handrail, making it possible to accurately detect the speed.In turn, the moving speeds of the moving handrail and the steps can be accurately compared, and the This is effective in taking appropriate safety measures such as issuing an accurate warning or stopping the operation based on the speed difference between the two.

In addition, not only the inner and outer rollers but also the non-contact detectors can be made smaller due to the development of electronic components, making the overall structure more compact, making it easier to install inside narrow escalators, and simplifying maintenance and inspection work. become.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 3. Components in the figure that are the same as those described in FIGS. 7 to 9 are given the same reference numerals to simplify the explanation.

In FIGS. 1 and 3, numeral 30 indicates a slider railing speed detection device of the present invention, which is installed at an appropriate location on the lower side of the handrail return path inside the handrail 11 in FIG. There is. Here, 31 in the figure is an outer roller 3 that rolls into contact with the outer decorative surface 12a made of rubber or the like of the movable handrail 12 from below.
Reference numeral 2 denotes an inner roller which rolls into contact with the inner surface 12b of canvas or the like of the slider handrail 12 from above so as to face the outer roller 31 with the movable handrail 12 in between. It has bearings 33, 34 (see FIG. 3) and is rotatably fitted to a shaft 35, 36. A support frame 37 is erected and fixed by welding or the like on the upper surface of the truss 1 to support the outer and inner rollers 31 and 32 having such a structure. This support frame 37 has an L-shaped plate shape, and a shaft fitting hole 37b is provided in the lower end of the rising plate part 37a.
, and the base end of the shaft 35 of the outer roller 31 is [
It is fixed by welding. Further, a pair of supports are horizontally provided with bars 37c projecting horizontally from the upper end of the rising plate portion 37a with a distance in the moving direction of the handrail, and both supports are provided with bars 37c.
The inner roller 32 is supported on the pressing member 7c via a pressing mechanism 38. In other words, the pressing mechanism 38 is in such a form that the pair of supports can be mounted on the bar 37c, and both ends of the shaft 36 of the inner roller 32 are connected to the V! ! , a movable frame 39 that supports the tube, and a pair of supports that penetrate from above through spring washers 40 at both ends of the movable frame 39, respectively, and are screwed and tightened into threaded holes (not shown) in the bar 37c. Tightening consists of bolt 41, both of which are tightened by bolt 4.
1, by tightening the three movable frames to push them downward, the inner roller 32 is moved to the inner side tf of the handrail 12.
By pressing against the surface 12b, the movable handrail 12 is appropriately pinched between the outer roller and the outer roller.

The outer roller 31 mounted and supported as described above has four actuating pieces 42, each made of a magnetic metal body, protruding from the periphery of the end surface on the side opposite to the support frame at equal intervals in the circumferential direction. , rotates integrally with the outer roller 31. Further, a mounting plate 43 is protruded from the rising plate portion 37a of the support frame 37 on one side thereof at approximately the same height as the outer roller 31, and a non-contact detector 44 such as an electromagnetic proximity switch is mounted on this mounting plate 43. This tip is attached to the end surface of the outer roller 31 near one side of the rotational movement position of each operating piece 42. This non-contact detector 44 detects each operating piece 428 passing near the tip one after another and outputs a pulse signal corresponding to the moving speed of the moving handrail 12. Control panel 2 described later
It is designed to be input to the speed comparison circuit.

With the movable element catching speed detection device 30 configured as described above, the movable handrail 12 is pressed between the outer roller 31 and the inner roller 32 which is pressed by the mechanism 38. The actuating pieces 42 roll into contact with the outer decorative surface 12a of the slider slide 12 and follow the rotation, and each operating piece 42 rotates and moves integrally with the outer roller 31. A non-contact detector 44 detects each rotatably moving operating piece 42 and outputs a pulse signal corresponding to the moving speed of the movable handrail 12.

Here, the outer roller 31 has a plurality of actuating pieces 4 on its periphery.
Since it is small and lightweight, the moment of inertia is small.
The outer decorative surface 12a has a larger friction coefficient than the inner surface 12b of the moving handrail 12. Since sufficient rotational frictional force 11 is applied to the movable element (8 and 12), the movable element (8 and 12) rotates very accurately in response to changes in speed.

In addition, even in an environment where rainwater may enter, the outer decorative surface 12a has the property of repelling water, and even if it gets wet, it quickly drains the water, so the decrease in the coefficient of friction is less likely to be The roller 31 no longer slips.

For this reason, the outer roller 31 always accurately follows the movement of the movable handrail 12 and rotates, and the non-contact detector 44 sequentially detects each operating piece 42 that rotates integrally with the outer roller 31 to rotate the movable handrail 12. It outputs an accurate pulse signal proportional to the moving speed, ensuring accurate speed detection at all times.

In the above embodiment, the mechanism 38 was used for pressing the slider slide 12 between the outer and inner rollers 31 and 32, and the bolt 41 was used for tightening, but in addition to this, as shown in FIG. A configuration using a spring 46 may also be used, and the same effects as in the above embodiment can also be obtained.

Next, the speed detection signal from the moving handrail speed detection device @30 is compared with the moving speed of the step 5 to take safety measures such as issuing a warning or stopping the operation based on the speed difference between the two. Other devices will be explained.

First, in FIG. 5, 50 indicates a step speed detection device,
This fixes the rotating body 51 to the end of the rotating shaft 8a of the motor 8 of the electric drive device 7 installed in the upper floor machine room of the truss 1.
A plurality of actuating pieces 52 made of magnetic metal are protruded from this rotating body 51 at equal intervals in the circumferential direction in the same manner as described above, and an electromagnetic proximity switch etc. This is a configuration in which a non-contact detector 53 is attached via a bracket 54.

As the rotating body 51 rotates together with the rotating shaft 8a of the motor 8, each actuating piece 52 rotates and moves together with the rotating body 51. The non-contact detector 53 successively detects each rotating actuating piece 52 and outputs a pulse signal. As shown in FIGS. 7 and 9, the steps 5 are rotationally driven by the electric drive device 7 through the engagement of a sprocket and a chain, so the moving speed of the steps 5 and the rotational speed of the drive position 7 are always equal to each other. Since there is a constant proportional relationship, the pulse signal from the non-contact detector 53 can be directly treated as an accurate step speed value proportional to the moving speed of the step 5.

The pulse signal of the step speed value thus obtained is sent from the non-contact detector 53 to the υ1611 board 60 shown in the figure via the electric WA 55. A pulse signal from the above-mentioned moving handrail speed detection device 30 is also sent to the control I panel 60 via the electric wire 45.

The control panel 60 has a configuration as shown in FIG. 6, and has an internal speed comparison circuit 61, which includes a pulse voltage converter 62.
63 and a voltage comparison circuit 64, the pulse voltage converter 62 receives the pulse signal from the non-contact detector 44 of the handrail speed detection device 30, and the pulse voltage converter 63 receives the pulse signal from the non-contact detector 44 of the handrail speed detection device 50. Pulse signals from the contact detectors 53 are respectively input, and each pulse within a certain period of time is converted into a voltage. Both voltages are then output to the voltage comparison circuit 64, where they are compared. As a result, if a voltage difference (speed difference) greater than a predetermined value occurs, that signal is output to the operation stop command circuit 65, which outputs a stop command to the main control circuit 66, and the electric drive The motor 8 of the device 7 is stopped, and the operation of the escalator is stopped. At this time, it is also possible to issue an alarm to notify of danger.

Such an operation is performed with a very accurate speed detection signal, because accurate speed detection signals are sent not only from the step speed detection device 50 but also from the moving handrail speed detection device 30 as described above.
IIO becomes possible, which is very advantageous in terms of safety measures.

Further, the control panel 60 is provided with a startup compensation circuit 67, and the voltage comparison circuit 64 is used until the steps 5 and the handrail 12 are in a steady running state when the escalator is started.
This prevents malfunctions by prohibiting output from the

〔Effect of the invention〕

Since the present invention is made as described above, the outer roller can rotate to accurately follow the speed change of the moving handrail of an escalator or a moving walkway, and the moving speed can always be detected correctly. It is possible to obtain a high-performance moving handrail speed detection device that is extremely advantageous for taking safety measures by correctly grasping the speed difference between the handrail and the steps. In addition, the structure is simple and compact, and installation and maintenance and inspection work are easy and practical.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the moving handrail speed detection device of the present invention, and FIG. 1 is a partially sectional side view;
2 is a sectional view taken along line I-II in FIG. 1, FIG. 3 is a sectional view taken along line I in FIG. 1, and FIG. 4 is equivalent to FIG. 1 showing another embodiment of the present invention. Figure 5 is a side view showing the step speed detection device and 1lJtll board installed in the escalator machine room, Figure 6 is a block circuit diagram showing the configuration of the control m+ board, and Figure 7 is a schematic diagram of a conventional escalator. configuration diagram, No. 8
The figure is an enlarged view of the vicinity of the moving handrail drive mechanism in Figure 7, and Figure 9.
The figure is a schematic configuration diagram of a conventional escalator with a different type of moving handrail drive mechanism. 5... Steps, 11... Balustrade, 12... Movable handrail, 12a... Outer decorative surface, 12b... Inner surface, 31
...outer roller, 32...inner roller, 37...support frame, 38...pressing mechanism, 42...operating piece,
44...Non-contact detector. Applicant's Representative Patent Attorney Takehiko Suzue Figure 3 Figure 4 Figure 07 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] In an escalator or a moving walkway in which the handrails on both sides of endless steps are provided with moving handrails that move in synchronization with the steps, the moving handrails are attached to a part of the return path of the moving handrails inside the lower side of the handrails. an outer roller that is rotatably provided in a state where it is in rolling contact with the outer decorative surface of the handrail, and an inner roller that is rotatably provided in a position opposite to the outer roller with the movable handrail interposed therebetween and that is in rolling contact with the inner surface of the movable handrail. rollers, a pressing mechanism that constantly presses the inner rollers against the inner surface of the moving handrail in a state where the inner and outer rollers pinch the moving handrail, and a pressing mechanism that is arranged around the outer rollers at equal intervals in the circumferential direction. The moving speed of the handrail is determined by successively detecting a plurality of operating pieces arranged to rotate together with the outer roller and each operating piece installed near the outer roller and rotating together with the outer roller. 1. A moving handrail speed detecting device for an escalator or a moving walkway, comprising a non-contact detector that outputs a pulse signal according to the speed.