JP2012111574A - Passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a passenger conveyor capable of performing to brake a continuously variable transmission surely when the continuously variable transmission is attached to a driving motor.SOLUTION: The passenger conveyor has a speed detector 56 which detects that the continuously variable transmission 16 is accelerated to a predetermined rotation speed or more, and when the speed detector 56 detects such an acceleration a braking device 34 presses a brake shoe 40 against a braking wheel 36, wherein the braking wheel 36 is attached coaxially with a driving large sprocket 24.

Description

  Embodiments of the present invention relate to passenger conveyors such as escalators and moving walkways.

  In order to realize energy saving operation in the escalator, there is a method of low speed operation when there are no passengers in the escalator. In this case, a continuously variable transmission is used to operate the escalator at a low speed (see, for example, Patent Document 1).

Japanese Patent Publication No. 5-37912

  By the way, the main brake for stopping the escalator is more efficient when the rotation of the drive motor of the escalator is directly braked. Therefore, the main brake has a structure for directly braking the output shaft of the drive motor.

  However, when a continuously variable transmission is attached to the drive motor as described above, this structure makes it impossible to control the continuously variable transmission, and if the input shaft to the continuously variable transmission is damaged. There is a problem that the escalator cannot be stopped. In particular, there is a problem that a safety measure is required when the control of the continuously variable transmission becomes impossible while the escalator is being lowered.

  Therefore, in view of the above problems, the embodiment of the present invention provides a passenger conveyor that can reliably brake the continuously variable transmission when the continuously variable transmission is attached to the drive motor.

  An embodiment of the present invention is provided on a drive motor, a speed reducer coupled to the drive motor, a continuously variable transmission coupled between the drive motor and the speed reducer, and an output side of the speed reducer. A first drive sprocket, a second drive sprocket coupled to the first drive sprocket via a drive chain, a step sprocket attached to the second drive sprocket, and a step chain spanned over the step sprocket A passenger conveyor comprising: a step attached to the step; and brake means for stopping or decelerating the rotation of the second drive sprocket when the continuously variable transmission accelerates to a predetermined rotational speed or more. is there.

It is explanatory drawing of the escalator of Example 1 which concerns on this invention. It is explanatory drawing of a machine room. It is a block diagram of an escalator. It is explanatory drawing of the machine room of Example 2. FIG. It is explanatory drawing of the machine room of Example 3. FIG. FIG. 10 is an explanatory diagram of a normal machine room according to a fourth embodiment. It is explanatory drawing of the machine room at the time of abnormality of Example 4. FIG. FIG. 10 is an explanatory diagram of a machine room according to a fifth embodiment.

  Hereinafter, the escalator 10 which is one of the passenger conveyors of embodiment of this invention is demonstrated based on drawing.

  Hereinafter, the escalator 10 of Example 1 which concerns on this invention is demonstrated based on FIGS. 1-3.

(1) Structure of escalator 10 The structure of the escalator 10 of a present Example is demonstrated based on FIG.

  A drive motor 12 and a continuously variable transmission 16 connected to the drive motor 12 are disposed in a machine room 15 on the upper floor side of the truss 11 installed in the building. A main brake 14 for stopping the rotation of the output shaft of the drive motor 12 is provided between the drive motor 12 and the continuously variable transmission 16. A reduction gear 18 is attached to the output shaft of the continuously variable transmission 16. A drive small sprocket 20 is attached to the output shaft of the speed reducer 18. On the other hand, a driving large sprocket 24 is coaxially attached to one end of the driving shaft 22, and an endless driving chain 26 is stretched between the driving small sprocket 20 and the driving large sprocket 24.

  The continuously variable transmission 16 is provided with a speed detector 56 for detecting the rotational speed of the output shaft of the continuously variable transmission 16.

  A pair of left and right step sprockets 28, 28 are attached to both ends of the drive shaft 22. In addition, a pair of left and right step sprockets (not shown) are attached to the lower floor side of the truss 11, and endless step chains 30 and 30 are suspended between the step sprockets 28 and 28 on the upper floor side. A plurality of steps 32 are attached between the pair of left and right step chains 30, 30.

  A brake device 34 of the continuously variable transmission 16 is attached to the large driving sprocket 24. The brake device 34 will be described in detail later.

  A plurality of safety switches 52 for detecting an abnormal state are provided on both sides of the step 32. The safety switch 52 includes, for example, a skirt guard pinching detection device, an inlet pinching detection device (handrail belt entry port pinching detection device), and a step lift detection device.

  In the machine room 15 on the upper floor side of the truss 11, a control device 54 composed of a computer is arranged.

(2) Brake device 34 of continuously variable transmission 16
Next, the brake device 34 of the continuously variable transmission 16 will be described with reference to FIG.

  A brake wheel 36 is provided on the drive shaft 22 coaxially with the drive large sprocket 24. The brake wheel 36 is attached to the tip of the drive shaft 22, for example.

  A brake column 38 is erected vertically from the bottom surface of the truss 11 toward the vicinity of the outer periphery of the brake wheel 36. A wedge-shaped brake shoe can be moved up and down along the brake pillar 38, and the brake shoe 40 is provided and supported at the upper end of the support bar 42, and can move up and down together with the support bar 42. A coiled spring 44 is attached to the support bar 42 in the vertical direction, and the brake shoe 40 is always urged upward along the support bar 42. When the brake shoe 40 is positioned at the upper end by the spring 44, the brake shoe 40 is pressed and engaged between the brake column 38 and the brake wheel 36 to prevent the brake wheel 36 from rotating.

  An engaging claw 46 projects from the lower part of the brake shoe 40. On the other hand, an operation switch 48 is provided on the bottom surface of the truss 11, and the operation unit 50 can be engaged with the engagement claw 46. When the brake shoe 40 is moved to the lowest position against the urging force of the spring 44 and the engaging claw 46 is engaged with the operating portion 50 of the operation switch 48, the brake shoe 40 is opposed to the urging force of the spring 44. It is fixed to the lower part of the support bar 42 (the state of the two-dot chain line in FIG. 2). When the operation switch 48 is operated and the engagement between the operation unit 50 and the engaging claw 46 is released, the brake shoe 40 moves to the upper end by the urging force of the spring 44 and prevents the braking wheel 36 from rotating.

(3) Electrical Configuration of Escalator 10 Next, the electrical configuration of the escalator 10 will be described based on the block diagram of FIG.

  Connected to the control device 54 are the drive motor 12, the main brake 14, the continuously variable transmission 16, the speed detector 56, the operation switch 48, and the safety switch 52.

(4) Operating State of Escalator 10 Next, a control method in the case where the continuously variable transmission 16 in the escalator 10 is accelerated to a predetermined rotational speed or higher due to something will be described.

  First, in a normal state, the brake shoe 40 of the brake device 34 is fixed to the lower portion of the support bar 42.

  The speed detection unit 56 always detects the rotational speed of the output shaft of the continuously variable transmission 16 and outputs an abnormal signal to the control device 54 when the rotational speed is accelerated to a predetermined rotational speed or higher.

  When this abnormal signal is input, the control device 54 operates the operation switch 48 to release the engagement between the operation unit 50 and the engagement unit 48, and the brake shoe 40 is applied to the brake wheel 36 using the biasing force of the spring 44. By pressing and meshing, the rotation of the brake wheel 36 is stopped, and the escalator 10 is stopped.

(5) Effects According to the present embodiment as described above, the escalator 10 can be stopped by the brake device 34 when the continuously variable transmission 16 in the escalator 10 becomes abnormal and accelerates. In particular, even if the control of the continuously variable transmission 16 becomes abnormal due to the descending operation of the escalator 10, the escalator 10 can be stopped reliably, and passenger safety can be ensured.

  Next, the escalator 10 of Example 2 which concerns on this invention is demonstrated based on FIG. The difference between the present embodiment and the first embodiment is the structure of the brake device 34.

  In the first embodiment, after the brake device 34 operates and the brake shoe 40 is pressed against the brake wheel 36, the operator enters the machine room 15 and manually moves the brake shoe 40 against the biasing force of the spring 44. It is necessary to press down and engage the operating portion 50 and the engaging claw 46.

  Therefore, in this embodiment, as shown in FIG. 4, a wire 58 is attached to the lower part of the brake shoe 40, the wire 58 is guided along the wire guide 60 to the upper side of the machine chamber 15, and the other end portion of the wire 58. Is taken out of the machine room 15. The wire guide 60 is tubular, for example, and the wire 58 is inserted through the inside thereof.

  By doing so, even if the brake shoe 40 is pressed against the braking wheel 36, the operator pulls the other end of the wire 58 from the outside of the machine room 15, and the brake shoe 40 is against the urging force of the spring 44. Can be pushed down. Therefore, the operator does not need to enter the inside of the machine room 15 and can secure the operator's safety.

  Next, the escalator 10 of Example 3 which concerns on this invention is demonstrated based on FIG. The difference between the present embodiment and the first embodiment is the structure of the brake device 34.

  In the first and second embodiments, the brake shoe 40 is engaged between the brake column 38 and the braking wheel 36, and the rotation of the braking wheel 36 is completely stopped.

  Instead, in this embodiment, as shown in FIG. 5, the arcuate brake shoe 40 is pressed against the lower portion of the brake wheel 36 to decelerate the rotation of the brake wheel 36.

  In this embodiment, a support bar 42 is provided at the lower part of the arc-shaped brake shoe 40 and is urged upward by a coiled spring 44. Then, the operating portion 50 of the operation switch 48 engages with the engaging claw 46 at the lower end of the brake shoe 40.

  Under normal conditions, the engaging claw 46 and the operating portion 50 are engaged with each other against the urging force of the coiled spring 44.

  When the continuously variable transmission 16 accelerates to a predetermined rotational speed or higher, the control device 54 operates the operation switch 48 to release the engagement between the operation unit 50 and the engagement claw 46, and the arc brake The shoe 40 is pressed against the lower portion of the brake wheel 36 by the biasing force of the spring 44. In this case, unlike the brake shoe 40 of the first and second embodiments, the arc-shaped brake shoe 40 is merely pressed against the brake wheel 36, so the brake wheel 36 does not stop completely but decelerates. Can continue to rotate at low speed.

  According to the escalator 10 of this embodiment, when the continuously variable transmission 16 is abnormal, the escalator 10 is not stopped completely, and the escalator 10 is operated at a safe low speed.

  Next, the escalator 10 of Example 4 which concerns on this invention is demonstrated based on FIG.6 and FIG.7. The difference between the present embodiment and the first embodiment is the structure of the brake device 34.

  In the present embodiment, as shown in FIGS. 6 and 7, a disk-like rotating body 64 is rotatably supported on a support column 62 erected from the truss 11. The rotating body 64 is in contact with the large driving sprocket 24 and rotates in synchronization with the rotation of the large driving sprocket 24.

  The rotating body 64 is provided with a pair of brake shoes 66 and 66. The pair of brake shoes 66, 66 can rotate around a rotation shaft 68 at one end of the brake shoe 66, and one end of a spring 70, 70 is attached to the other end of the brake shoe 66. The other end of the rotating body 64 is fixed near the center axis of the rotating body 64.

  As shown in FIG. 6, when the rotation speed of the rotating body 64 is slow, the pair of brake shoes 66 and 66 are housed inside the rotating body 64 by the biasing force of the spring 70.

  As shown in FIG. 7, when the rotation speed of the rotating body 64 is higher than the predetermined rotation speed, that is, when the rotation speed exceeds the predetermined rotation speed set by the continuously variable transmission 16, The other end of the pair of brake shoes 66, 66 moves radially outward against the urging force of 70, 70 and protrudes outward of the rotating body 64, and is pressed against the outer peripheral portion of the brake wheel 36. The rotational speed of 36 is reduced. The urging force of the springs 70 is set together with the centrifugal force generated by the rotation of the rotating body 64 corresponding to the case where the continuously variable transmission 16 is accelerated to a predetermined rotational speed or higher.

  According to the present embodiment, the escalator 10 can be decelerated without being stopped when the continuously variable transmission 16 is abnormal, so that it is possible to avoid the risk of passengers falling due to the stop.

  Next, the escalator 10 of Example 5 which concerns on this invention is demonstrated based on FIG. The difference between the present embodiment and the first embodiment is the structure of the brake device 34.

  In this embodiment, the dynamo 72 is used as the brake device 34. The dynamo 72 is a power generator that generates direct current by the rotation of the rotor 74.

  The dynamo 72 is in contact with the large driving sprocket 24 and has a rotor 74 that rotates in synchronization with the large driving sprocket 24, an operation switch 76, and a resistor 78. The rotor 74, the operation switch 76, A resistor 78 is connected in series.

  In a normal state, the control device 54 turns the operation switch 76 OFF, does not connect the resistor 78 of the dynamo 72, and only rotates in synchronization with the large driving sprocket 24. Therefore, the rotation of the large driving sprocket 24 is performed. It does not slow down the speed.

  When the continuously variable transmission 16 rotates more than a predetermined rotational speed, the controller 54 switches the operation switch 76 from the OFF state to the ON state, connects the resistor 78, and starts the power generation of the dynamo 72. As a result, the amount of power generation increases as the rotational speed of the rotor 74 increases, resulting in resistance to rotation of the large driving sprocket 24, and the escalator 10 decelerates.

  According to the present embodiment, the escalator 10 can be decelerated without being stopped when the continuously variable transmission 16 is abnormal, so that it is possible to avoid the risk of passengers falling due to the stop.

Example of change

  In each of the above embodiments, the escalator 10 is described as a passenger conveyor, but a moving sidewalk may be used instead.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Escalator, 12 ... Drive motor, 16 ... Continuously variable transmission, 18 ... Reduction gear, 20 ... Drive small sprocket, 24 ... Drive large sprocket, 26 ... Drive Chain, 28 ... step sprocket, 30 ... step chain, 32 ... step, 34 ... brake device, 36 ... brake wheel, 38 ... brake post, 40 ... brake shoe, 42 ... support rod, 44 ... spring, 46 ... engaging claw, 48 ... operation switch, 50 ... operation part, 54 ... control device, 56 ... speed detection part

A brake device 34 (FIG. 2) of the continuously variable transmission 16 is attached to the large driving sprocket 24. The brake device 34 will be described in detail later with reference to FIG .

In the machine room 15 on the upper floor side of the truss 11, a control device 54 (FIG. 3) composed of a computer is arranged. The control device 53 will be described in detail later with reference to FIG.

A brake column 38 is erected vertically from the bottom surface of the truss 11 toward the vicinity of the outer periphery of the brake wheel 36. A wedge-shaped brake shoe 40 can move up and down along the brake pillar 38, and the brake shoe 40 is provided and supported at the upper end of a support bar 42, and can move up and down together with the support bar 42. A coiled spring 44 is attached to the support bar 42 in the vertical direction, and the brake shoe 40 is always urged upward along the support bar 42. When the brake shoe 40 is positioned at the upper end by the spring 44, the brake shoe 40 is pressed and engaged between the brake column 38 and the brake wheel 36 to prevent the brake wheel 36 from rotating.

(4) operating state of the escalator 10 Next, the escalator 10, with reference to FIGS. 1 to 3, the continuously variable transmission 16 will be described a control method in the case where the acceleration above the predetermined rotational speed for some reason.

First, in a normal state, the brake shoe 40 of the brake device 34 is fixed to the lower portion of the support rod 42 (a state of a two-dot chain line in FIG. 2) .

Controller 54, when the abnormality signal is input, by operating the operation switch 48 to release the engagement of the operation portion 50 and the engaging pawl 46, the brake shoe 40 to the brake wheel 36 using the urging force of the spring 44 Pressing and meshing, the rotation of the brake wheel 36 is stopped, and the escalator 10 is stopped (state of solid line in FIG. 2) .

Claims (6)

A drive motor;
A speed reducer coupled to the drive motor;
A continuously variable transmission coupled between the drive motor and the speed reducer;
A first drive sprocket provided on the output side of the speed reducer;
A second drive sprocket coupled to the first drive sprocket via a drive chain;
A step sprocket attached to the second drive sprocket;
A step attached to a step chain spanned over the step sprocket;
Braking means for stopping or decelerating the rotation of the second drive sprocket when the continuously variable transmission accelerates above a predetermined rotational speed;
Passenger conveyor characterized by having. A speed detection unit for detecting that the continuously variable transmission has accelerated more than the predetermined rotational speed;
The brake means includes
A braking wheel provided coaxially with the second drive sprocket;
A brake shoe that presses against the braking wheel to stop or slow down the rotation of the braking wheel;
An operation means for pressing the brake shoe against the braking wheel when the speed detection unit detects the acceleration;
The passenger conveyor according to claim 1, comprising: The operating means presses the brake shoe against the braking wheel with a biasing force of a spring.
The passenger conveyor according to claim 2. The brake means includes release means for releasing the brake shoe pressed against the brake wheel.
The passenger conveyor according to claim 2 or 3, characterized in that. The brake means includes
A braking wheel provided coaxially with the second drive sprocket;
A brake that presses against the braking wheel against the urging force of a spring and stops or decelerates the rotation of the braking wheel when the second drive sprocket rotates at a rotational speed equal to or higher than the predetermined rotational speed. Shue and
The passenger conveyor according to claim 1, comprising: A speed detection unit for detecting that the continuously variable transmission has accelerated more than the predetermined rotational speed;
The brake means includes
A braking wheel provided coaxially with the second drive sprocket;
A dynamo having rotating means that rotates together with the braking wheel by being brought into contact with the braking wheel;
When the speed detection unit detects the acceleration, the dynamo generates electricity and decelerates the rotation of the braking wheel; and
The passenger conveyor according to claim 1, comprising:

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