JP6617899B1 - Passenger conveyor and its assembly method - Google Patents

Abstract

An object of the present invention is to provide a passenger conveyor capable of easily setting a distance between a ratchet lever and a ratchet wheel. An adjusting member (74) is provided on the ratchet lever (50) for adjusting the distance between the ratchet lever (50) and the ratchet wheel (42) in a state where the ratchet lever (50) does not mesh with the ratchet wheel (42). [Selection diagram] FIG.

Description

  Embodiments of the present invention relate to passenger conveyors such as escalators and moving walkways, and methods for assembling the same.

  A plurality of steps of the passenger conveyor are circulated by a step chain, and this step chain is driven by a step wheel. On the other hand, a small drive wheel is attached to a motor, which is a drive mechanism for the step, via a speed reducer, and a drive chain is spanned between the large drive wheel and the small drive wheel that are mounted coaxially with the step wheel. .

  2. Description of the Related Art Conventionally, an emergency stop device (ratchet device) is provided that detects the breakage or elongation of the drive chain and makes an emergency stop of the movement of a step. In this emergency stop device, a shoe as a pressing member is placed on a drive chain, and this shoe is rotatably connected to a ratchet lever via a connecting shaft. When the drive chain is cut or extended and the shoe moves, the ratchet lever rotates with the movement of the shoe and meshes with the ratchet wheel that is mounted coaxially with the step wheel, thus stopping the movement of the step. .

JP 2017-160035 A Japanese Patent No. 6253777

  In the emergency stop device as described above, when the ratchet lever is attached to the truss, it is necessary to accurately set the distance between the ratchet wheel and the ratchet lever. That is, when the pressing member is normal, the ratchet lever does not mesh with the ratchet wheel, and when the step chain is cut or extended and the pressing member descends, the ratchet lever must be engaged with the ratchet wheel. There was a problem that work was troublesome.

  Then, in view of the said problem, embodiment of this invention aims at providing the passenger conveyor which can set the distance of a ratchet lever and a ratchet wheel easily.

An embodiment of the present invention includes a truss arranged in the front-rear direction, a plurality of steps that circulate and move the truss in the front-rear direction, an endless step chain that interconnects the steps, and the step chain. A step wheel to be driven, a large drive wheel provided coaxially with the step wheel, a drive device for driving the small drive wheel, and a drive chain spanned between the large drive wheel and the small drive wheel A ratchet wheel provided coaxially with the step wheel, a connecting shaft provided in the left-right direction of the truss, a pressing lever suspended around the connecting shaft, and a lower end of the pressing lever A holding member mounted on the drive chain by its own weight and rotating together with the holding lever around the connecting shaft, the ratchet A ratchet lever that meshes with wheel, provided on the ratchet lever, possess the ratchet lever and an adjusting member capable of adjusting the distance between the ratchet lever and the ratchet wheel in the state does not engage in the ratchet wheel, the adjustment A member is provided to be rotatable with respect to the ratchet lever so that the adjustment member is visible from the rotation axis direction of the adjustment member and is not visible from the rotation axis direction of the adjustment member to expose the adjustment member from the ratchet lever. It is a passenger conveyor that can be stored and that allows the distance to be set by exposing the adjustment member from the ratchet lever and bringing it into contact with the ratchet wheel .

Side surface explanatory drawing of the escalator which shows this embodiment. The longitudinal cross-sectional view of the machine room inside of an upper floor side. The front view of a unit apparatus. The enlarged front view of a holding lever, a holding member, and a drive chain. The side view of the state which is adjusting the distance of a ratchet wheel and a ratchet lever with an adjustment member. The side view when the ratchet lever and the ratchet wheel are not engaged with each other in a state where they are set at a normal distance. The side view of the state which the ratchet lever meshed | engaged with the tooth | gear part of the ratchet wheel.

  Hereinafter, the passenger conveyor which is one Embodiment of this invention is demonstrated with reference to FIGS. In this embodiment, the escalator 10 is described as a passenger conveyor.

(1) Structure of Escalator 10 The structure of the escalator 10 will be described with reference to FIG.

  A truss 12 is installed between the upper floor and the lower floor of the building where the escalator 10 is installed. A plurality of steps 14 connected endlessly are provided inside the truss 12. A pair of left and right balustrades 16, 16 are provided on the left and right sides of the upper surface of the truss 12, and a handrail belt 18 is provided on the periphery of the balustrade 16.

  A machine room 20 is provided on the upper floor side of the truss 12, and a motor 22 that is a drive source of the escalator 10, a speed reducer 24, and a small driving wheel provided on the output side of the speed reducer 24 are provided in the machine room 20. 26 is provided. A pair of endless left and right step chains 28 are provided to move the plurality of steps 14, and a pair of left and right step wheels 30 are provided inside the machine room 20 to drive the pair of left and right step chains 28. Is provided. On the other hand, a pair of left and right step wheels 34 is also provided in the machine room 32 on the lower floor side. It is being handed over.

  A large driving wheel 36 is provided coaxially with the step wheel 30, and a driving chain 38 is stretched between the large driving wheel 36 and the small driving wheel 26. An emergency stop device (ratchet device) 40 is provided in the upper floor side machine room 20 to detect the occurrence of an abnormality such as cutting of the drive chain 38 and stop the rotation of the step wheel 30. . The emergency stop device 40 will be described in detail later.

(2) Emergency stop device 40
Next, the emergency stop device 40 will be described with reference to FIGS.

  As shown in FIG. 2, a motor 22 and a speed reduction device 24 are installed inside the upper floor side machine room 20, and a drive small wheel 26 is attached to the speed reduction device 24. A large driving wheel 36 and a ratchet wheel 42 are provided coaxially with the step wheel 30 (see FIG. 1).

  As shown in FIG. 2, a ratchet beam 46 is provided in the left-right direction of the upper surface of the machine room 20 in the upper frame 44 of the truss 12 constituting the machine room 20 on the upper floor side. The ratchet beam 46 is fixed to the frame body 44. As shown in FIG. 3, a connecting shaft 48 is rotatably provided along the ratchet beam 46.

  As shown in FIG. 3, a holding lever 52 is suspended from the right side of the connecting shaft 48, and a holding member (shoe) 54 is provided at the lower end of the holding lever 52 as shown in FIG. . As shown in FIG. 4, the pressing member 54 is placed on the drive chain 38 and has a connecting plate 56. The connection plate 56 is a rectangular plate material that is long along the front-rear direction of the drive chain 38. As shown in FIG. 4, the left end is bent upward, and the lower end of the holding lever 52 is interposed via a pin 58. It is suspended in a freely rotating manner. A rectangular parallelepiped sliding plate 60 is provided on the lower surface of the connecting plate 56. A groove 63 is provided on the lower surface of the sliding plate 60 in the front-rear direction. As shown in FIG. 4, the lower surface of the sliding plate 60 is placed on the drive chain 38 except for the groove 63. Is done. The material of the sliding plate 60 is, for example, rubber or synthetic resin.

  As shown in FIG. 3, a ratchet lever 50 is suspended from the left side of the connecting shaft 48 and rotates around the connecting shaft 48. As shown in FIG. Engage. As shown in FIGS. 3 and 5 to 7, a switch support member 62 is provided at the portion of the ratchet beam 46 to which the ratchet lever 50 is attached. A limit switch (emergency stop switch) 64 is attached to the switch support member 62. The ratchet lever 50 near the connecting shaft 48 is provided with a plate-like switch lever 66. In a state where the ratchet lever 50 is not meshed with the tooth portion 43 of the ratchet wheel 42 (see FIG. 6), the limit switch 64 is not pressed and the ratchet lever 50 rotates and meshes with the tooth portion 43 of the ratchet wheel 42 ( 7), the switch lever 66 pushes the limit switch 64.

  As shown in FIGS. 5 to 7, a rectangular plate-shaped adjustment member 74 is provided on the distal end side of the ratchet lever 50 so as to be rotatable around a rotation shaft 76. The adjusting member 74 sets a distance from the ratchet wheel 42 in a state where the adjusting member 74 is exposed from the ratchet lever 50 (see FIG. 5). The length of the adjusting member 74 is the tooth portion 43 of the ratchet wheel 42. And the distance from the ratchet lever 50 that is not meshed with the tooth portion 43 of the ratchet wheel 42.

  As shown in FIG. 3, an oil supply device 68 is provided on the pressing lever 52 side (right side in FIG. 3) of the ratchet beam 46. The oil supply device 68 is provided with a tank for storing lubricating oil and a pump. The oil is supplied from the tank to the drive chain 38 and the step chain 28 using an oil supply pipe (not shown).

  As shown in FIG. 3, a plurality of rectangular step covers 70 are suspended from the ratchet beam 46 between the switch support member 62 and the oil supply device 68. As shown in FIG. 2, the step cover 70 is suspended vertically from the ratchet beam 46 at the top of the truss 12 and extends to the bottom of the large driving wheel 36. The step cover 70 is for ensuring safety so that the maintenance worker does not accidentally approach the step wheel 30 when the maintenance worker works in the machine room.

(3) Unit device 72 and its assembling method The ratchet beam 46, the connecting shaft 48, the ratchet lever 50, the pressing lever 52 and the pressing member 54 provided at the lower end thereof, the switch support member 62, the limit switch 64, and the oil supply described above. The device 68 and the step cover 70 are integrated to form a unit device 72. And this unit apparatus 72 is assembled in a factory, and it conveys integrally to the site where the escalator 10 is installed. At the site, the emergency stop device 40 can be easily attached by welding the ratchet beam 46 in the unit device 72 to the frame body 44 of the truss 12 or fixing it with a bolt.

  Next, after the unit device 72 is mounted in the truss 12, the adjustment member 74 is exposed from the ratchet lever 50 as shown in FIG. Then, with the pressing member 54 on the drive chain 38, the adjustment member 74 is applied to the tooth portion of the ratchet wheel 42, and the distance between the ratchet lever 50 and the ratchet wheel 42 is set. In this case, if the ratchet lever 50 is rotatable in advance with respect to the connecting shaft 48 and is set to a normal distance by the adjusting member 74, the ratchet lever 50 and the connecting shaft 48 cannot be rotated at that position. Fix it.

  Next, as shown in FIG. 5, the adjustment member 74 is housed in the ratchet lever 50 again.

(4) Operation of Emergency Stop Device 40 The operation state of the emergency stop device 40 will be described.

  As shown in FIGS. 2 and 4, the pressing member 54 is always placed on the drive chain 38. Even if the escalator 10 is driven and the drive chain 38 moves, the sliding plate 60 is placed on the drive chain 38 to suppress the vertical vibration of the drive chain 38.

  When the drive chain 38 is cut or extended for some reason, the pressing member 54 moves downward, and the pressing lever 52 rotates with it. When the pressing lever 52 is rotated, the ratchet lever 50 is similarly rotated through the connecting shaft 48, and the tip of the ratchet lever 50 is engaged with the tooth portion 43 of the ratchet wheel 42 to stop the rotation of the step wheel 30.

  When the ratchet lever 50 is engaged with the tooth portion 43 of the ratchet wheel 42, as shown in FIG. 7, the switch lever 66 pushes the limit switch 64, and a control device (not shown) to which the limit switch 64 is connected is connected to the motor. 22 is stopped. Thereby, the safety of the passenger of the escalator 10 can be ensured.

(5) Effects According to the present embodiment, the connecting shaft 48, the ratchet lever 50, the pressing lever 52 and the pressing member 54, the limit switch 64, and the oil supply device 68 are integrated into the ratchet beam 46 as a unit device 72. Therefore, the emergency stop device 40 can be attached simply by attaching the ratchet beam 46 of the unit device 72 to the frame body 44 of the truss 12.

  In addition, since the distance between the ratchet lever 50 and the ratchet wheel 42 can be accurately set by the adjusting member 74 after the unit device 72 is attached, the work of the maintenance staff is simplified.

(6) Modified Example In the above embodiment, the unit device 72 is formed. However, a handle is detachably provided on the ratchet beam 46 in the unit device 72, and this handle is attached when the unit device 72 is transported and removed. Work can be simplified.

  Although the escalator 10 has been described in the above embodiment, the present invention may be applied to a moving sidewalk 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.

10 ... Escalator, 12 ... Truss, 20 ... Machine room, 22 ... Motor, 28 ... Step chain, 30 ... Step wheel, 36 ... Large drive wheel, 38 ... Drive chain, 40 ... emergency stop device, 42 ... ratchet wheel, 44 ... frame, 46 ... ratchet beam, 48 ... connecting shaft, 50 ... ratchet lever, 52 ... · Pressing lever, 54 ··· Holding member, 64 ··· Limit switch, 68 ··· Oil supply device, 70 ··· Step cover, 72 · · Unit device, 74 · · · Adjustment member

Claims (9)

A truss arranged in the front-rear direction,
A plurality of steps that circulate and move the truss in the front-rear direction;
An endless step chain connecting the plurality of steps to each other;
A step wheel for driving the step chain;
A large driving wheel provided coaxially with the step wheel;
A driving device for driving a small driving wheel;
A drive chain spanned between the large drive wheel and the small drive wheel;
A ratchet wheel provided coaxially with the step wheel;
A connecting shaft provided in the left-right direction of the truss;
A holding lever that is suspended around the connecting shaft, and
A pressing member attached to the lower end of the pressing lever and placed on the drive chain by its own weight;
A ratchet lever that rotates with the holding lever about the connecting shaft and meshes with the ratchet wheel;
An adjustment member that is provided on the ratchet lever and that can adjust the distance between the ratchet lever and the ratchet wheel in a state where the ratchet lever does not mesh with the ratchet wheel;
Have a,
The adjusting member is rotatably provided to the ratchet lever;
The adjustment member can be stored so that the adjustment member is not exposed from the ratchet lever as viewed from the rotation axis direction of the adjustment member, and the adjustment member is exposed from the ratchet lever and brought into contact with the ratchet wheel. The distance can be set,
Passenger conveyor. The adjustment member is plate-shaped,
The passenger conveyor according to claim 1. A ratchet beam that rotatably supports the connecting shaft, the connecting shaft, the pressing lever attached to one of the connecting shafts, the pressing member attached to the lower end of the pressing lever, and the other of the connecting shafts The ratchet lever together forms a unit device,
By fixing the ratchet beam in the left-right direction of the truss, the unit device is provided inside the truss.
The passenger conveyor according to claim 1. The unit device
The ratchet beam has an emergency stop switch that is operated when the ratchet lever is engaged with the ratchet wheel.
The passenger conveyor according to claim 3 . The unit device
The ratchet beam has an oil supply device for supplying lubricating oil to the drive chain and the step chain,
The passenger conveyor according to claim 3 . The unit device
Having a step cover that partitions the drive device and the step wheel;
The passenger conveyor according to claim 3 . The ratchet beam is provided with a detachable handle,
The passenger conveyor according to claim 3 . The passenger conveyor is an escalator or a moving walkway.
The passenger conveyor according to claim 3 . Fixing the ratchet beam in the unit device of the passenger conveyor according to claim 3 in the left-right direction of the truss,
Positioning the ratchet lever with respect to the ratchet wheel using the adjustment member;
How to assemble a passenger conveyor.

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