WO2018011960A1

WO2018011960A1 - Safety device for passenger conveyor

Info

Publication number: WO2018011960A1
Application number: PCT/JP2016/070929
Authority: WO
Inventors: 真吾土居
Original assignee: 三菱電機株式会社
Priority date: 2016-07-15
Filing date: 2016-07-15
Publication date: 2018-01-18
Also published as: JPWO2018011960A1

Abstract

A safety device for a passenger conveyor is provided with: a rotating body which rotates according to the movement of steps; a protruding member that is provided at the rotating body so as to protrude in the lateral direction with respect to the direction of rotation, has a front part and a rear part with respect to the direction of rotation, and is provided with an engaging part at the front part; an engaging member that engages with the engaging part, and is provided separated from the engaging part; and a displacement member that has a main body and a distal end, the main body being attached to a building-side attachment section, and the engaging member being attached to the distal end, and that is displaced between an engagement position for retaining the engagement member at a position of engagement, and a separation position for retaining the engagement member at a separated position. In a state of displacement to the engagement position, the main body is disposed from the rear part of the engaged protruding member toward the attachment section.

Description

Passenger conveyor safety device

The present invention relates to a safety device for passenger conveyors.

The conventional passenger conveyor safety device is provided with a ratchet wheel that is rotated in conjunction with the movement of the step, and when the drive chain is broken, the ratchet wheel is stopped to stop the step. An engaging portion is provided on the outer peripheral portion of the ratchet wheel, and the engaging portion is rotated as the ratchet wheel rotates. One end of a ratchet pole is rotatably supported on the main frame. When the drive chain is broken, the ratchet pole is rotated, and the ratchet pole is sandwiched between the engaging portion of the ratchet wheel and the main frame to stop the rotation of the ratchet wheel. The steps that were moving in conjunction with the rotation of the ratchet wheel will also stop. (See Patent Document 1)

JP 2006-143424 A

However, in the above-described passenger conveyor safety device, the ratchet pole is sandwiched between the engagement portion of the ratchet wheel and the main frame in order to stop the moving step, so that a large compressive load is applied to the ratchet pole. Therefore, the ratchet pole needs to have a large strength so as not to buckle.

The present invention has been made to solve such a problem, and an object thereof is to obtain a safety device for a passenger conveyor with reduced strength constraints.

The safety device for a passenger conveyor according to the present invention includes a rotating body that is rotated according to the movement of a step, a protrusion that protrudes laterally with respect to the rotating direction, and is provided on the rotating body. A projecting member having a front portion and a rear portion, and having an engaging portion at the front portion, an engaging member that is engaged with or separated from the engaging portion, and a main body and a tip portion. The main body is attached to the attachment portion on the building side, the engagement member is attached to the tip portion, the engagement member holding the engagement member at the engaged position, and the engagement member at the separated position. A displacement member that is displaced to a holding position that is held, and in a state where the displacement member is displaced to the engagement position, the main body is disposed from the rear portion of the projecting member engaged toward the attachment portion. .

According to the present invention, the protruding member is provided in the rotating body in the transverse direction with respect to the rotating direction, and the engaging portion is provided in the protruding member in the front portion in the rotating direction. The main body of the displacement member is attached to an attachment portion on the building side, and an engagement member is attached to the distal end portion of the displacement member. The main body is arranged from the rear part of the projecting member toward the mounting part in a state where the tip part holds the engaging member engaged with the engaging part. Thereby, rotation of a rotary body stops. When stopping the rotation of the rotating body, a tensile load acts on the displacement member, and a compressive load does not act. For this reason, since it is not necessary to consider the buckling of a displacement member, the safety device of a passenger conveyor which reduced the restrictions of intensity can be obtained.

According to the present invention, it is possible to obtain a passenger conveyor safety device with reduced strength constraints.

It is a whole block diagram of the escalator which shows Embodiment 1 of this invention. It is the figure which expanded the principal part in the machine room of FIG. It is the figure which expanded the principal part in the machine room of FIG. It is a figure which shows the arrow A of FIG.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall configuration diagram of an escalator showing Embodiment 1 of the present invention. FIG. 2 is an enlarged view of a main part in the machine room of FIG. 1, and shows a state when the drive chain is operating normally. FIG. 3 is an enlarged view of a main part in the machine room of FIG. 1, and shows a state when the drive chain is broken. FIG. 4 is a diagram showing an arrow A in FIG.

In the figure, a main frame 1 is installed in a building (not shown), and a plurality of steps 3 connected endlessly by a step chain 2 are supported on the main frame 1. On the main frame 1, a pair of balustrades 4 that are opposed to both sides of the step 3 in the width direction are provided. In the machine room 5 at the upper end in the longitudinal direction of the main frame 1, a driving machine 6, a sprocket device 7 that is rotated by receiving the driving force of the driving machine 6, a safety device 8 that applies a braking force to the sprocket device 7, A control device (not shown) for controlling the operation of the escalator is provided.

The driving machine 6 includes a driving machine main body 9 including a motor and a brake device, and a driving machine sprocket 10 provided in the driving machine main body 9 and rotated by the driving force of the driving machine main body 9. A driving force is applied to the driving machine sprocket 10 by a motor of the driving machine body 9, and a braking force is applied by an operation of a brake device of the driving machine body 9.

The sprocket device 7 has a main shaft 11 with an axis extending in the width direction of the step 3, and a drive sprocket 12 and an upper step sprocket 13 fixed to the main shaft 11, respectively. The main shaft 11, the drive sprocket 12, and the upper step sprocket 13 are rotated together around the axis of the main shaft 11.

An endless drive chain 14 is wound between the drive sprocket 10 and the drive sprocket 12. The drive chain 14 is tensioned so that the drive chain 14 does not loosen. The driving force applied by the driving machine body 9 is transmitted in the order of the driving machine sprocket 10, the driving chain 14, the driving sprocket 12, the main shaft 11, the upper step sprocket 13, the step chain 2, and the step 3. The main shaft 11, the drive sprocket 12, and the upper step sprocket 13 are rotated together as the driving force of the drive machine 6 is transmitted to the drive sprocket 12.

At the lower end in the longitudinal direction of the main frame 1, there is provided a lower step sprocket 15 that can rotate around the axis of the rotary shaft that is arranged with the axis extending in the width direction of the step 3. The step chain 2 is wound between an upper step sprocket 13 and a lower step sprocket 15. Note that the step chain 2 is wound around the lower end of the main frame 1 in the longitudinal direction, and is not limited to the lower step sprocket 15. For example, the shaft extended in the width direction of the step 3 is arranged. A reversing rail attached to the base may be used. The step chain 2 is moved by the rotation of the upper step sprocket 13. Each step 3 is circulated by the movement of the step chain 2.

The braking force applied by the drive machine body 9 is transmitted in the order of the drive machine sprocket 10, the drive chain 14, the drive sprocket 12, the main shaft 11, the upper step sprocket 13, the step chain 2, and the step 3, and the step 3 stops. For this reason, for example, when the drive chain 14 is broken, the braking force applied by the drive machine body 9 is not transmitted to the step 3. In this case, since the safety device 8 applies a braking force to the sprocket device 7, the braking force is transmitted in the order of the main shaft 11, the upper step sprocket 13, the step chain 2, and the step 3, and the step 3 stops.

The safety device 8 includes a ratchet device 20 installed on the main shaft 11, a detection device 30 that detects breakage of the drive chain 14, and an engagement device 40 installed on the main frame 1 above the ratchet device 20. ing. The ratchet device 20 as the rotating body and the projecting member is rotated integrally with the main shaft 11, the drive sprocket 12 and the upper step sprocket 13 around the axis of the main shaft 11. Thereby, the ratchet device 20 rotates according to the movement of the step 3.

The ratchet device 20 includes a disc member 21 fixed to the main shaft 11, a ratchet wheel 22 disposed with a gap 29 between the disc member 21 and the disc member 21 on the outer peripheral side of the disc member 21, and the disc member 21 and the ratchet wheel. And a plurality of friction members 23 arranged in the circumferential direction along the outer periphery of the disk member 21, and the friction members 23 are tightened so as to press the disk member 21 and the ratchet wheel 22. Bolt 24 and a nut (not shown).

The disc member 21 and the ratchet wheel 22 can be relatively displaced in the circumferential direction. Since the disc member 21 and the ratchet wheel 22 are both sandwiched between the friction members 23, a frictional force is generated when they are relatively displaced in the circumferential direction. If the torque that is relatively displaced in the circumferential direction is smaller than the friction torque, the disk member 21 and the ratchet wheel 22 rotate together or stop together.

For example, when the drive chain 14 is broken, the safety device 8 operates to stop the rotating ratchet wheel 22. Although the driving force is not transmitted to the step 3 due to the breakage of the drive chain 14, the step 3 tends to descend due to the weight of the passenger riding on the step 3. At this time, even if the ratchet wheel 22 is suddenly stopped, the disk member 21 can rotate and the step 3 can move. And since the disk member 21 and the step 3 are gradually decelerated and stopped by the frictional force, a sudden stop shock is not transmitted to the passenger on the step 3.

The escalator is operated ascending when the step 3 rises or descending when the step 3 descends, and the direction in which the ratchet wheel 22 rotates is determined according to the driving direction. For example, in FIG. 2, the ratchet wheel 22 rotates to the left when the ascending operation is performed, and the ratchet wheel 22 rotates to the right when the descending operation is performed. Regardless of the driving direction during ascending operation or descending operation, when the drive chain 14 is broken, the step 3 tends to descend due to the weight of the passenger riding on the step 3. At this time, the ratchet wheel 22 tends to rotate in the direction when the step 3 moves downward. In FIG. 3, the ratchet wheel 22 rotates to the right.

A plurality of teeth 25 are formed on the outer peripheral portion of the ratchet wheel 22 as projecting members that protrude to the outer peripheral side in the radial direction of the ratchet wheel 22 that is transverse to the direction in which the ratchet wheel 22 is rotated. . For each tooth 25, an engaging portion 26 is provided on the front portion 25a side of the front portion 25a and the rear portion 25b in the direction in which the ratchet wheel 22 is rotated. The front side of the tooth 25 is the front part 25a and the rear side of the tooth 25 is the rear part 25b with respect to the rotating direction of the ratchet wheel 22 when the drive chain 14 is broken and the step 3 is going to descend. An engaging portion 26 is provided on the front side of the tooth 25 with respect to the rotating direction of the ratchet wheel 22 when the step 3 is about to descend.

An upper beam 1a is provided as a beam of the main frame 1 above the ratchet device 20. The detection device 30 is attached to the upper beam 1a. A support member 31 attached to the upper beam 1a is provided extending downward. A connecting shaft 32 parallel to the main shaft 11 is provided on the support member 31 so as to be rotatable with respect to the support member 31. A shoe pole 33 is fixed to one end side of the connecting shaft 32, and an arm 34 is fixed to the other end side. The shoe pole 33 and the arm 34 can swing around the connecting shaft 32. When the tip of the shoe pole 33 is lowered, the tip of the arm 34 is raised, and when the tip of the shoe pole 33 is raised, the tip of the arm 34 is lowered. A shoe 35 is attached to the tip of the shoe pole 33. The shoe pole 33 is placed on the drive chain 14 via the shoe 35. The shoe 35 can slide on the moving drive chain 14.

The shoe 35 is disposed on a drive chain 14 stretched between the drive sprocket 10 and the drive sprocket 12. In this state, the arm 34 is provided to extend toward the engagement device 40. A protruding member 36 that protrudes in parallel with the axis of the connecting shaft 32 is provided at the tip of the arm 34 on the side of the engaging device 40. When the drive chain 14 is broken, the front side of the shoe 35 and the shoe pole 33 is lowered downward by its own weight. As the tip of the shoe pole 33 is lowered, the connecting shaft 32 is rotated, the tip of the arm 34 is raised, and the protruding member 36 is moved upward.

The engagement device 40 is attached to the upper beam 1a as an attachment portion. The engagement device 40 is installed above the ratchet device 20. In FIG. 4, the cross section of the upper beam 1a in the width direction of the step 3 has an L shape. One side of the L shape extends horizontally, and the other side extends downward from the end of the horizontal side. Is provided. A pair of attachment members 41 are fixed to each other on the lower side of the horizontal side of the upper beam 1a with a gap therebetween. The attachment member 41 is provided with the tip side facing the ratchet device 20. The attachment member 41 is provided so as to be inclined with respect to the upper beam 1 a when viewed from the axial direction of the main shaft 11.

A columnar shaft 42 is stretched over and fixed to the distal ends of the pair of mounting members 41. A ratchet pole 43 as a displacement member is disposed between the pair of attachment members 41. A shaft 42 is passed through the main body 43 a of the ratchet pole 43. The ratchet pole 43 is supported on the shaft 42. An engaging member 44 is attached to the tip 43b of the ratchet pole 43.

The rear end 43c side opposite to the front end 43b with respect to the main body 43a extends toward the arm 34 of the detection device 30. The ratchet pole 43 can swing around the axis of the shaft 42. When the front end portion 43b is raised, the rear end portion 43c is lowered, and when the front end portion 43b is lowered, the rear end portion 43c is raised. The front end 43b side to which the engagement member 44 is attached is heavier than the rear end 43c side, and in a state where only the shaft 42 is supported, the front end 43b side is lowered and the rear end 43c side is lower. Go up. In this case, the tip end portion 43 b side is inclined toward the lower ratchet wheel 22.

When the tip 43b of the ratchet pole 43 is tilted toward the ratchet wheel 22 and displaced to the engagement position, the engagement member 44 engages with the engagement portion 26 of one tooth 25 of the teeth 25 of the ratchet wheel 22. Combined. When the engaging member 44 is engaged with the engaging portion 26, the ratchet wheel 22 stops rotating in the direction from the rear portion 25b of the tooth 25 to the front portion 25a. Accordingly, the downward movement of the step 3 is stopped. When the distal end portion 43 b of the ratchet pole 43 is moved away from the ratchet wheel 22 and is moved away from the ratchet wheel 22, the engagement member 44 is separated from the engagement portion 26 of the tooth 25 of the ratchet wheel 22. When the engaging member 44 is separated from the engaging portion 26, the ratchet wheel 22 can rotate in a direction from the rear portion 25b of the tooth 25 toward the front portion 25a. Accordingly, the step 3 can move downward.

In the state where the drive chain 14 is normally stretched between the drive sprocket 10 and the drive sprocket 12, the ratchet pole 43 is displaced to the separated position. The front end portion 43 b of the ratchet pole 43 is lowered by its own weight, and the rear end portion 43 c tends to rise upward, but the protruding member 36 is placed on the rear end portion 43 c of the ratchet pole 43. A force to push upward from the rear end 43c acts on the protruding member 36, but in order for the protruding member 36 to move upward, the shoe 35 must be lowered downward. The shoe 35 is placed on the drive chain 14 and cannot be lowered. As a result, the ratchet pole 43 is held at the separated position in a state where the drive chain 14 is normally stretched.

When the drive chain 14 is broken, the tip side of the shoe 35 and the shoe pole 33 is lowered by its own weight. As the tip of the shoe pole 33 is lowered, the connecting shaft 32 is rotated, the tip of the arm 34 is raised, and the protruding member 36 is moved upward. The protruding member 36 is separated from the rear end portion 43 c of the ratchet pole 43. As a result, the rear end portion 43c can be raised upward, and the tip end portion 43b is lowered downward. In this way, the ratchet pole 43 is displaced to the engagement position, and the engagement member 44 is engaged with the engagement portion 26 of the tooth 25.

With the engagement member 44 engaged with the engagement portion 26 of the tooth 25 and the tip end portion 43b of the ratchet pole 43 holding the engagement member 44, the main body 43a of the ratchet pole 43 extends from the rear portion 25b of the tooth 25. It arrange | positions so that it may face toward the upper beam 1a. The ratchet pole 43 is disposed so as to be inclined with respect to the upper beam 1a, and is inclined so as to be separated downward from the upper beam 1a as it goes from the main body 43a to the distal end portion 43b. The rear end portion 43c of the ratchet pole 43 is disposed between the pair of attachment members 41, and the ratchet pole 43 and the attachment member 41 are parallel to each other.

In such a safety device 8, when the drive chain 14 is broken, the engaging member 44 is engaged with the engaging portion 26 of the front portion 25a of the tooth 25 of the ratchet wheel 22 to be rotated. The engaging member 44 is held by the tip end portion 43 b of the ratchet pole 43. The main body 43 a of the ratchet pole 43 is disposed from the rear portion 25 b of the tooth 25 toward the upper beam 1 a and is attached to the upper beam 1 a via the shaft 42 and the attachment member 41. Thereby, the rotation of the ratchet wheel 22 is stopped. At this time, a tensile load acts on the ratchet pole 43, and a compressive load does not act. For this reason, since it is not necessary to consider the buckling of the ratchet pole 43, the safety device 8 with reduced strength restrictions can be obtained.

Further, since the ratchet pole 43 displaced to the engagement position is inclined with respect to the upper beam 1a, the force acting on the upper beam 1a is in a direction perpendicular to the longitudinal direction of the upper beam 1a and the longitudinal direction. To be distributed. Furthermore, the force acting in the direction perpendicular to the longitudinal direction of the upper beam 1a acts in the direction in which the two sides intersecting each other close when viewed in the direction in which the cross section of the upper beam 1a becomes L-shaped. A beam having an L-shaped cross section can withstand a greater force when acting in a direction in which two sides are closed than in a direction in which two sides are opened. For this reason, it is possible to reduce the size of the upper beam 1a and to make the upper beam 1a with a simple structure with a reduced number of reinforcing members.

In the present embodiment, the detection device 30 and the engagement device 40 are described above provided on the ratchet device 20. However, the detection device 30 and the engagement device 40 are provided below the ratchet device 20. Also good.

Further, in the present embodiment, as a mechanism for interlocking the engagement device 40 with the detection device 30, the protruding member 36 placed on the rear end portion 43 c of the ratchet pole 43 is separated and the ratchet pole 43 is displaced to the engagement position. However, the present invention is not limited to such a mechanism. For example, when the drive chain is broken, a mechanism in which the protruding member pushes up the rear end of the ratchet pole, or the detection device and the engagement device are gears. An interlocking mechanism may be used.

In the present embodiment, the ratchet pole 43 is described as being attached to the upper beam 1a via the attachment member 41. However, even if the ratchet pole 43 is attached to the building-side attachment portion without using the attachment member 41. good.

1 main frame, 1a beam, 3 steps, 8 safety device, 20 ratchet device, 21 disc member, 22 ratchet wheel, 23 friction member, 24 bolt, 25 teeth, 25a front part, 25b rear part, 26 engagement part, 29 Gap, 40 engaging devices, 41 mounting members, 42 shafts, 43 ratchet poles, 43a main body, 43b front end, 43c rear end, 44 engaging members

Claims

A rotating body that is rotated according to the movement of the step;
A protruding member that protrudes laterally with respect to the rotated direction and is provided on the rotating body, has a front portion and a rear portion with respect to the rotated direction, and is provided with an engaging portion at the front portion. When,
An engaging member that is engaged with or separated from the engaging portion;
An engagement position having a main body and a tip, wherein the main body is attached to a building-side attachment, the engagement member is attached to the tip, and the engagement member is held at the engaged position. And a displacement member that is displaced to a separated position that holds the engaging member at the separated position,
In the state displaced to the engagement position, the main body is arranged from the rear portion of the engaged projecting member toward the attachment portion, and a safety device for a passenger conveyor .
The mounting part on the building side is a beam provided in a horizontal direction above the rotating body,
2. The displacement member is inclined with respect to the beam so as to be separated from the beam as it moves from the main body toward the distal end portion in a state of being displaced to the engagement position. Safety device for passenger conveyor as described in 1.