WO2007080890A1

WO2007080890A1 - Device for detecting operation direction of passenger conveyor

Info

Publication number: WO2007080890A1
Application number: PCT/JP2007/050166
Authority: WO
Inventors: Kouji Sugiura
Original assignee: Toshiba Elevator Kabushiki Kaisha
Priority date: 2006-01-10
Filing date: 2007-01-10
Publication date: 2007-07-19
Also published as: HK1127329A1; JP2007182315A; CN101365644A; CN101365644B; JP4986455B2

Abstract

The center (p) of a rotating body (81) of an operation direction detection device (8) and the center (P) of rotation of an output shaft (rotating shaft)(4a) connected to a rotating machine (4) are separated (ΔP) from each other. This causes the rotating body (81) to eccentrically rotate and a detection piece (821) oscillates in the direction corresponding to the direction of the rotation. The oscillation enables detection of the rotation direction of the rotating machine (4). An end of the detection piece (821) faces and slides on the circular outer peripheral surface of the rotating body (81). Because the outer peripheral surface has no irregularity and the end of the detection piece (821) smoothly slides along the surface while keeping in intimate contact with the surface, noise is reduced.

Description

Specification

Driving direction detection device for passenger conveyor

Technical field

[0001] The present invention relates to an improvement in a driving direction detection device for a passenger conveyor.

Background art

[0002] Passenger conveyors such as escalators often employ rotating machines such as electric motors that can rotate forward and reverse as drive devices. In this passenger conveyor, switching from ascending operation to descending operation or from descending operation to ascending operation is performed depending on the time zone and the flow direction of passengers. As a result, operational efficiency is improved.

[0003] Therefore, for some reason, it is inconvenient if the passenger conveyor starts operation in the direction opposite to the intended operation direction or the commanded operation direction. In some cases, passenger safety may be compromised.

[0004] Therefore, in the passenger conveyor, an operation direction detection device is incorporated in the rotating shaft of the rotating machine, that is, the output shaft.

[0005] A conventional driving direction detection device has a circular rotating body that rotates in conjunction with the rotation of a rotating machine, and one end surface of a rotatable detection piece is in sliding contact with the outer peripheral surface of the rotating body. Switch.

[0006] The operation direction is detected by utilizing the fact that the direction of the contact piece that rotates and tilts differs between normal rotation and reverse rotation of the rotating machine. If the switcher detects that the rotating machine is rotating in the direction opposite to the intended direction, the safety device is activated immediately and the operation is controlled to be stopped by turning off the power. (See Patent Document 1.) o

FIG. 1 is a side view of an escalator provided with a conventional driving direction detection device.

[0008] That is, on both sides of the step 1, the step chain 2 is connected to the upper floor and the lower floor in an endless manner. The step chain 2 functions to circulate and move the step 1 by being wound around the step sprockets 31 and 32 on the upper and lower floors.

[0009] The step sprockets 31, 32 are driven by a rotating machine 4 which is a driving device arranged on the upper floor side. Drive sprocket 5 connected to output shaft 4a of rotating machine 4 and upper step The drive sprocket 6 linked to the procket 31 is connected by a drive chain 7. The output shaft 4a of the rotating machine 4 is rotated by being decelerated by the speed reducer.

[0010] By the reversing operation of the rotating machine 4 capable of forward and reverse rotation, the step 1 is switched in the opposite direction and proceeds.

FIG. 2 is an enlarged view of the main part of FIG. 1, and FIG. 3 is an enlarged right side view of FIG. 4 is a cross-sectional view taken along line AA in FIG.

As shown in FIGS. 3 and 4, the driving direction detection device 8 incorporated in the output shaft 4 a of the rotating machine 4 rotates in conjunction with the rotation of the rotating machine 4. The driving direction detection device 8 is incorporated coaxially with the rotation center P of the rotating machine 4. The driving direction detection device 8 is composed of a drum-shaped rotating body 81 and a switch 82 having a circular outer peripheral shape and a concave portion 8 la toward a part of the outer surface. As shown in FIG. 4, the switch 82 has a detection piece 821 that can rotate in the direction of the arrow X while sliding opposite to the outer peripheral surface of the rotating body 81.

That is, as shown in FIG. 4, the detection piece 821 of the switch 82 is rotatable in the arrow X direction around a rotation shaft 821a provided at the center in the longitudinal direction. The detection piece 821 has a roller 821b at the upper end of one end thereof, which is in contact with the outer peripheral surface of the rotating body 81 and rotates as the rotating body 81 rotates.

[0014] Therefore, in a state where the concave portion 81a of the rotating body 81 is positioned at the lowermost position in the figure, the leading end portion of the detection piece 821 (that is, the roller 821b) is just fitted into the concave portion 81a and the attitude of the detection piece 821 (Longitudinal direction) is perpendicular to the vertical direction.

From this state, when the rotating body 81 rotates in either direction, the detection piece 821 is locked by the recess 81a and rotates, so that it is guided and tilted in the rotating direction of the rotating body 81. Therefore, the detection piece 821 is tilted in either the right direction or the left direction corresponding to the rotation direction of the rotating body 81, that is, the rotation direction of the rotating machine 4, and the state (posture) continues thereafter.

Limit switches 823a and 823b are arranged on the base 822 so as to form a pair at the left and right positions of the lower end of the detection piece 821 as shown in the figure. Since it is operated by the tilted detection piece 821, the corresponding limit switches 823a and 823b are operated according to the rotation direction of the rotating body 81.

That is, as shown in FIG. 4, if the rotating body 81 (that is, the rotating machine 4) is rotating in the direction indicated by the arrow R (counterclockwise), the detection piece 821 is the limit switch 823a. Actuated Rotate in the direction of Therefore, it is possible to know that the rotating machine 4 rotates in the R direction in the figure by the signal output from the limit switch 823a.

[0018] On the other hand, if the rotating machine 4 is rotating in the opposite direction (clockwise) to the arrow R, the detection piece 821 is opposite, and the limit switch 823b is activated. For this reason, it is possible to know that the rotating machine 4 rotates clockwise by the signal output from the limit switch 823b.

[0019] Although not shown, the detection piece 821 slidably contacting the rotating body 81 at the tip is urged by a biasing means such as a weak spring member so that the longitudinal direction is always perpendicular. It has been.

[0020] In the above configuration, the step 1 on which the passenger is placed moves up and down due to the circular movement of the step chain 2. For example, if the escalator performs an ascending operation due to the rotation in the direction indicated by the arrow R shown in FIG. From the output signal, it is detected that the operation is started in a direction different from the commanded operation direction. For this reason, it is controlled so that the safety device is activated and stopped immediately for safety.

Patent Document 1: Japanese Patent Laid-Open No. 3-279183

Disclosure of the invention

Problems to be solved by the invention

[0021] As described above, a conventional passenger conveyor driving direction detection device includes a switch 82 and a rotatable detection piece 821. The tip (821b) force of the detection piece 821 rotates while being locked by the recess 81a of the rotating rotating body 81, and performs a switching operation corresponding to the rotating direction.

[0022] Since the rotating body 81 is integrally formed with the output shaft 4a via the speed reducer, it rotates relatively slowly. However, the tip end of the detection piece 821 that continues to tilt falls into the concave portion 81a that rotates every rotation of the rotating body 81 at the tilted position, and generates an impact sound. Therefore, the conventional passenger conveyor driving direction detection device generates noise by the impact sound that the tip of the detection piece 821 falls into the recess 81a. For this reason, improvement has been desired.

Accordingly, an object of the present invention is to provide a passenger conveyor driving direction detection device capable of reducing noise generation. Means for solving the problem

[0024] The present invention has been made to solve the above-described conventional problems, and a first aspect of the present invention is connected to a rotating machine that drives a plurality of endless treads to circulate and move. In the passenger conveyor operation direction detection device capable of detecting the rotation direction of the rotating machine, the rotating machine rotates in conjunction with the rotation of the rotating machine and has a biased center position with respect to the rotating shaft of the rotating machine. In addition, a rotating body having a circular outer peripheral shape in a direction orthogonal to the rotating shaft, and one end surface of the rotatable detection piece are in sliding contact with the outer peripheral surface of the rotating body, the center position of the rotating body and the rotating shaft And a switch that performs an operation corresponding to the switching of the rotation direction of the rotating machine.

[0025] A second aspect of the present invention is a driving direction detection device for a passenger conveyor that is connected to a rotating machine that drives a plurality of endless treads to circulate and can detect the rotating direction of the rotating machine. It rotates in conjunction with the rotation of the rotating machine, and the outer peripheral shape in the direction perpendicular to the rotating shaft of the rotating machine is rotatable around the rotating shaft and the outer peripheral surface of the rotating body. And a switch that performs an operation corresponding to switching of the rotating direction of the rotating machine based on a difference in diameter to the outer periphery of the rotating body.

[0026] A third aspect of the present invention is a driving direction detection device for a passenger conveyor that is connected to a rotating machine that drives a plurality of endless treads to circulate and can detect the rotating direction of the rotating machine. A rotating body that rotates in conjunction with the rotation of the rotating machine, and whose outer peripheral shape in a direction perpendicular to the rotating shaft of the rotating machine is a part of the circumference centered on the rotating shaft cut out linearly; One end of a rotatable detection piece is in sliding contact with the outer peripheral surface of the rotating body, and performs an operation corresponding to the switching of the rotating direction of the rotating machine based on the difference in diameter to the outer periphery of the rotating body. It comprises.

[0027] A fourth aspect of the present invention is a driving direction detection device for a passenger conveyor that is connected to a rotating machine that drives a plurality of endless treads so as to circulate and that can detect the rotating direction of the rotating machine. The outer periphery of the rotating machine rotates in conjunction with the rotation of the rotating machine, and the outer peripheral shape in the direction perpendicular to the rotating shaft of the rotating machine is rotatable about the rotating shaft and the outer peripheral surface of the rotating body. One end of the detection piece is in sliding contact with the outer diameter of the rotating body. And a switch that performs an operation corresponding to switching of the rotating direction of the rotating machine based on the difference.

The invention's effect

[0028] In the passenger conveyor driving direction detecting device according to the first aspect of the present invention, the rotating body is eccentric and rotates because the rotating center of the rotating body and the rotating center of the rotating shaft are offset. .

[0029] The detection piece whose one end faces and slides on the outer peripheral surface of the rotating body rotating eccentrically is inclined in accordance with the rotation of the rotating body. Since the inclination direction differs depending on the rotation direction of the rotating body, the rotation direction of the rotating machine, that is, the operation direction of the passenger conveyor can be detected.

[0030] In the present invention, the one end of the detection piece smoothly slides oppositely while closely contacting along the circular outer peripheral surface of the rotator with no irregularities, so that conventional noise generation is avoided.

[0031] The passenger conveyor driving direction detecting device according to the second to fourth aspects of the present invention includes a rotating body that rotates coaxially with the rotating shaft, an elliptical shape, or a portion on a circumference. It was formed into a linearly cut shape or a polygonal shape. For this reason, as in the first aspect of the invention, the detection piece that inclines in the direction corresponding to the rotation direction of the rotating body slides smoothly with its one end in close contact with the outer peripheral surface. As a result, noise generation is avoided.

Brief Description of Drawings

FIG. 1 is an overall configuration diagram of an escalator equipped with a conventional rotation direction detection device.

FIG. 2 is an enlarged cross-sectional view showing a portion of the escalator shown in FIG. 1 where a rotation direction detection device is mounted.

FIG. 3 is an enlarged right side view of the main part of FIG.

4 is a cross-sectional view taken along the line AA in FIG.

[Fig. 5] Fig. 5 (a) is a block diagram showing an embodiment of a passenger conveyor rotation direction detecting device according to the present invention, and Fig. 5 (b) is a cross-sectional view taken along line BB in Fig. 5 (a). FIG.

FIGS. 6 (a) and 6 (b) are operation explanatory diagrams of the apparatus shown in FIGS. 5 (a) and 5 (b).

[FIG. 7] FIG. 7 is a sectional view showing a state in which the apparatus shown in FIGS. 5 (a) and 5 (b) is attached with another rotating body. FIG. 8 is a cross-sectional view showing a state in which the apparatus shown in FIGS. 5 (a) and 5 (b) is mounted with another rotating body.

[FIG. 9] FIG. 9 is a cross-sectional view showing a state in which the apparatus shown in FIGS. 5 (a) and 5 (b) is mounted with another rotating body.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of a passenger conveyor driving direction detection device according to the present invention will be described in detail. The same components as those of the conventional passenger conveyor driving direction detection device shown in FIGS. 1 to 4 are denoted by the same reference numerals, detailed description thereof is omitted, and portions different from the conventional device will be mainly described.

That is, FIG. 5 (a) is an enlarged right side view of the main part corresponding to FIG. 3, and FIG. 5 (b) is a cross-sectional view taken along line BB in FIG. 5 (a).

[0035] As shown in Fig. 5 (a) and Fig. 5 (b), the driving direction detection device 8 of this embodiment is similar to the conventional case in that the output shaft 4a of the rotating machine 4 via the speed reducer, that is, the rotation Built into the shaft. The driving direction detection device 8 is configured so that a drum-shaped rotating body 81 that rotates in conjunction with the rotation of the rotating machine 4 and one end portion of the detection piece 821 are in sliding contact with the outer peripheral surface of the rotating body 81. It consists of 82 switches.

[0036] As shown in Fig. 5 (a) and Fig. 5 (b), a rotating body 81 having a circular outer peripheral shape is attached in a direction orthogonal to the axial direction of the output shaft 4a of the rotating machine 4. ing. The rotating body 81 is attached such that its center p is offset from the center P of the output shaft 4a of the rotating machine 4 by a distance ΔP. The peripheral portion of the rotating body 81 that comes into contact with the detection piece 821 is bordered by a synthetic resin member 81b.

Therefore, as shown in FIG. 5 (b), the detection piece 821 of the switch 82 can rotate or swing in the direction of the arrow X around the rotation shaft 821a. Then, the center of the rotating body 81 deviated from the rotational center P of the rotating machine 4 by a distance ΔΡ p position force When positioned right above the rotational center P (upward in the figure), the posture of the detection piece 821 is The longitudinal direction is vertical. At this time, the tip of the detection piece 821 (that is, the roller 821b) is disposed so as to contact the outer peripheral surface of the rotating body 81. Although not shown, the detection piece 821 slidably contacting the rotating body 81 at the tip is urged by the urging means so that its longitudinal direction is always vertical, as in the conventional case. FIG. 6 is an explanatory diagram of the operation of the driving direction detection device 8. From the state shown in FIG. 6 (a), the rotating body 8 1 (that is, the rotating machine 4) moves in the direction indicated by the arrow R (counterclockwise). ), The detection piece 821 rotates and the limit switch 823a is activated (ON) as shown in Fig. 6 (b).

[0039] Further, when the rotating body 81 rotates in the direction indicated by the arrow R (counterclockwise), it returns to the position state shown in Fig. 6 (a), and the operation of the limit switch 823a by the detection piece 821 is stopped ( OFF).

[0040] Therefore, when the rotating body 81 rotates in the direction indicated by the arrow R (counterclockwise), the limit switch 823a repeats the ON-OFF operation with the detection piece 821 swinging, and transmits the repeated signal. To do. For this reason, the receiving side that has received the signal from the limit switch 823a can detect that the rotating machine 4 is rotating counterclockwise (arrow R direction).

[0041] When the rotating body 81 rotates in the direction opposite to the direction indicated by the arrow R (clockwise), the detection piece 821 on the contrary, swings so that the other limit switch 823b repeats the ON-OFF operation. To transmit the repetitive signal. For this reason, it is possible to detect that the rotating machine 4 is rotating in the clockwise direction on the signal receiving side from the limit switch 823b.

That is, if the rotating machine 4 operates and rotates in the direction of arrow R shown in FIG. 6 to perform the escalator ascending operation, the lower end of the detection piece 821 is left → center → left → center → Repeat the left and right shaking to turn limit switch 823a on and off. Therefore, if the limit switch 823a is configured with contact a, repeated signal transmission is performed in the order of close → open → close → open → close.

[0043] If the escalator is reversed from the ascending operation to the descending operation, the lower end of the detection piece 821 is moved to the right by the clockwise rotation opposite to the arrow R direction shown in FIG. Center → Right → Center → Right ”Repeatedly swing limit switch 823b ON-OFF. Therefore, if the limit switch 823b is configured with the b contact, the signal transmission is repeated from open → closed → open → closed → open.

In this way, one end of the detection piece 821 is in close contact with the circular outer peripheral surface of the rotator 81 with no irregularities, and operates the limit switches 823a and 823b with smooth opposing sliding. For this reason, conventional noise generation is avoided. [0045] With the above configuration, for example, when the operation command is ascending operation, the output ON-OFF signal from the limit switch 8 23a should be transmitted and supplied, but if the output from the limit switch 82 3b is ON-OFF If a signal is transmitted and supplied, it is detected that operation has started in a direction different from the commanded operation direction. For this reason, the safety device is controlled to operate and stop immediately for safety.

In the embodiment described above, the swing direction of the detection piece 821 is different corresponding to the rotation direction of the rotating body 81 (rotating machine 4). For this reason, the center p of the circular rotating body 81 and the center P of the output shaft 4a, which is the rotating shaft, are attached so as to be deviated by ΔΡ. However, even when the center p of the rotating body 81 is aligned with the center P of the output shaft 4a, it is assumed that the swing direction of the detection piece 821 differs depending on the rotating direction of the rotating body 81 (rotating machine 4). Can be output.

That is, FIGS. 7 to 9 are cross-sectional views corresponding to FIG. 5 (b). FIG. 7 shows that the rotating body 81 has an elliptical shape, and its center p is defined as the output shaft 4a. It shows the state of being attached in a state where it is aligned with the center P.

FIG. 8 shows a case where the rotating body 81 has a shape obtained by cutting out a part of the circumference in a straight line, and FIG. 8 shows a case where the rotating body 81 has a polygonal shape. In the case of V and misalignment, the center p of the rotating body 81 is attached so as to coincide with the center P of the output shaft 4a.

Thus, in the shape of the rotator 81 shown in FIGS. 7 to 9, in any case, the center p of the rotator 81 coincides with the center P of the output shaft 4a. In any case, one end portion of the rotatable detection piece 821 is in sliding contact with the outer peripheral surface of the rotating body 81 and periodically changes in the difference in diameter from the center p (P) to the outer periphery of the rotating body 81. In response to this, smooth swinging corresponding to the rotating direction of the rotating body 81 is performed. In either case, a switch output signal in a direction corresponding to the rotation direction of the rotating machine 4 can be transmitted.

In the above description, it has been described that the rotating body 81 is configured such that the contact portion with the detection piece 821 is bordered by the synthetic resin member 81b. Furthermore, the roller 821b at the tip of the detection piece 821 that slides and rotates opposite to the synthetic resin member 81b is also formed of the synthetic resin member in the same manner, so that noise generation can be further reduced.

Industrial applicability [0051] In the passenger conveyor driving direction detection device according to the first aspect of the present invention, the rotation body is eccentric and rotates because the rotation center of the rotation body and the rotation center of the rotation shaft are offset. The detecting piece whose one end faces and slides on the outer peripheral surface of the rotating body rotating eccentrically is inclined in accordance with the rotation of the rotating body. Since the inclination direction differs depending on the rotation direction of the rotating body, the rotation direction of the rotating machine, that is, the operation direction of the passenger conveyor can be detected.

[0052] In the present invention, the one end of the detection piece smoothly slides oppositely while closely contacting along the circular outer peripheral surface of the rotator with no irregularities, so that conventional noise generation is avoided.

Claims

The scope of the claims

[1] In a passenger conveyor driving direction detection device that is connected to a rotating machine that drives a plurality of endless treads to circulate and can detect the rotating direction of the rotating machine,

A rotating body that rotates in conjunction with the rotation of the rotating machine, has a center position that is deviated from the rotating shaft of the rotating machine, and has a circular outer peripheral shape in a direction perpendicular to the rotating shaft;

One end surface of the rotatable detection piece is in sliding contact with the outer peripheral surface of the rotating body, and the rotation direction of the rotating machine can be switched based on the deviation between the center position of the rotating body and the rotating shaft. A switch to perform the operation

A driving direction detecting device for a passenger conveyor.

[2] In a passenger conveyor driving direction detection device that is connected to a rotating machine that drives a plurality of endless treads to circulate and can detect the rotating direction of the rotating machine,

A rotating body that rotates in conjunction with the rotation of the rotating machine, and an outer peripheral shape in a direction orthogonal to the rotating shaft of the rotating machine is an elliptical shape around the rotating axis;

One end of the rotatable detection piece is in sliding contact with the outer peripheral surface of the rotating body, and performs an operation corresponding to the switching of the rotating direction of the rotating machine based on the difference in diameter to the outer periphery of the rotating body. When

A driving direction detecting device for a passenger conveyor.

[3] In a driving direction detection device for a passenger conveyor that is connected to a rotating machine that drives a plurality of endless treads to circulate and can detect the rotating direction of the rotating machine,

A rotating body that rotates in conjunction with the rotation of the rotating machine, and whose outer peripheral shape in a direction perpendicular to the rotating shaft of the rotating machine is a part of the circumference centered on the rotating shaft cut out linearly. One end of the rotatable detection piece is in sliding contact with the outer peripheral surface of the rotating body and performs an operation corresponding to the switching of the rotating direction of the rotating machine based on the difference in diameter to the outer periphery of the rotating body. With the switch

A driving direction detecting device for a passenger conveyor.

[4] In a driving direction detection device for a passenger conveyor that is connected to a rotating machine that drives a plurality of endless treads to circulate and can detect the rotating direction of the rotating machine, Rotating in conjunction with the rotation of the rotating machine, the outer peripheral shape in the direction orthogonal to the rotating shaft of the rotating machine is a polygonal rotating body centered on the rotating shaft,

One end of a rotatable detection piece comes into sliding contact with the outer peripheral surface of the rotating body, and performs an operation corresponding to the switching of the rotating direction of the rotating machine based on the difference in diameter to the outer periphery of the rotating body. When

A driving direction detecting device for a passenger conveyor.

[5] The driving direction of the passenger conveyor according to any one of claims 1 to 4, wherein the rotating body comprises a synthetic resin member at a contact portion with the detection piece. Detection device.