JPWO2008012866A1 - Passenger conveyor - Google Patents

Abstract

The passenger conveyor includes a plurality of steps having step rollers, a guide rail that guides the step rollers, and an abnormality detection device that detects whether the step rollers are separated from the guide rails. Each step is moved along an endless circulation path. The circulation path has an outward path and a return path located below the forward path. Moreover, the return path side path has a return path side transition part to which each step adjacent to each other is moved while being displaced in the vertical direction. The abnormality detection device detects whether or not the step roller is separated from the guide rail when the step is moved on the return path side transition portion.

Description

  The present invention relates to a passenger conveyor such as an escalator or a moving sidewalk.

  In general, each step of the escalator is circulated and moved between an outward path side for transporting passengers and a return path side located below the outward path side. In a conventional escalator, if the toe of a rubber shoe is sandwiched between the steps when moving on the forward path side, the front wheel of the step may float from the guide rail.

  Conventionally, in order to detect the lifting of the front wheel of a step, an escalator safety device having a movable rail disposed above the guide rail and a shoe biting detection mechanism operated by displacement of the movable rail has been proposed. . The shoe biting detection mechanism is actuated when the movable rail is pushed up to the front wheel of the step. The lift of the front wheel of the step is detected by the operation of the shoe biting detection mechanism.

  Since the movable rail is based on the premise that the toes of rubber shoes are sandwiched between the steps, the movable rail is disposed only above the guide rail that guides the steps when moving on the forward path side. Therefore, the lifting of the front wheel of the step is detected only when the step is moved on the forward path side (see Patent Document 1).

Japanese Utility Model Publication No. 63-46457

  Therefore, when the step is moved on the return path side, it is impossible to detect the lifting of the front wheel of the step. As a result, for example, when a foreign object such as a coin falls into the truss of the escalator and the foreign object is sandwiched between steps moved on the return path side, the step will be moved while the front wheel is lifted. . As a result, the steps may collide with a truss, for example, and the escalator device may be damaged.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a passenger conveyor that can more reliably prevent damage to equipment in the truss.

  The passenger conveyor according to the present invention has a step roller, a plurality of steps that are moved along an endless circulation path, a guide rail that guides the step roller, and an abnormality that detects whether the step roller is separated from the guide rail. The circulation path has a forward path and a return path located below the forward path, and the return path is moved while the steps adjacent to each other are displaced in the vertical direction. The abnormality detecting device detects whether or not the step roller is separated from the guide rail when the step is moved along the return side transition portion.

It is a side view which shows the escalator by Embodiment 1 of this invention. It is an enlarged view which shows the II section of FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. FIG. 3 is an enlarged view showing a state in which a part of the steps are lifted up with foreign matters sandwiched between the steps in FIG. 2. It is an enlarged view which shows the V section of FIG. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. It is a side view which shows the return side lower end transition part of the escalator by Embodiment 2 of this invention. It is an enlarged view which shows the VIII part of FIG. It is sectional drawing along the IX-IX line of FIG. It is a side view which shows the return side upper end transition part of the escalator by Embodiment 2 of this invention. It is an enlarged view which shows the XI part of FIG. It is sectional drawing along the XII-XII line | wire of FIG.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a side view showing an escalator according to Embodiment 1 of the present invention. In the figure, a drive machine 2 and a sprocket body 3 that is rotated by the driving force of the drive machine 2 are provided at the upper end of a truss (main frame) 1. The sprocket body 3 has a drive sprocket 4 and an upper step sprocket 5 that are rotated integrally with each other. A lower step sprocket 6 is provided at the lower end of the truss 1.

  A drive chain 7 is wound around the drive sprocket 4. The driving force of the driving machine 2 is transmitted to the driving sprocket 4 via the driving chain 7. The drive sprocket 4 and the upper step sprocket 5 are rotated together when the drive sprocket 4 receives the drive force from the drive machine 2.

  The truss 1 supports a plurality of steps 9 connected endlessly by a step chain 8. The step chain 8 is wound around the upper step sprocket 5 and the lower step sprocket 6. Each step 9 is moved along an endless circulation path by the rotation of the upper step sprocket 5. The endless circulation path includes an outward path 10 for conveying passengers, and a return path 11 that is continuous with the outbound path 10 and is positioned below the outbound path 10.

  The forward path 10 includes the forward slope part that is moved through the intermediate portion of the truss 1 while the adjacent steps 9 are aligned in the inclination direction, and the truss 1 that is adjacent to the horizontal steps 9 that are adjacent to each other. Each of the forward side upper end horizontal part and the forward side lower end horizontal part moved respectively at the upper end part and the lower end part, and each of the forward side upper end horizontal part and the forward side lower end horizontal part and the forward side inclined part adjacent to each other. The step 9 has an outward path upper end transition part and an outbound path side lower end transition part that are respectively moved while being displaced in the vertical direction.

  The return side path 11 includes a return side inclined part that is moved through an intermediate part of the truss 1 while the adjacent steps 9 are aligned in the inclination direction, and a step of the truss 1 that is adjacent to the steps 9 that are adjacent to each other in the horizontal direction. Each of the return side upper end horizontal part and the return side lower end horizontal part moved respectively at the upper end part and the lower end part, and each of the return side upper end horizontal part and the return side lower end horizontal part and the return side inclined part adjacent to each other. The step 9 has a return-side upper end transition portion and a return-side lower end transition portion that are respectively moved while being displaced in the vertical direction.

  FIG. 2 is an enlarged view showing a portion II in FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. In addition, the return side lower end transition part is shown by the II part of FIG. In the figure, each step 9 protrudes from the step body 12, the widthwise ends of the step body 12, a step shaft 13 to which the step chain 8 is connected, and a pair of drives provided rotatably on each step shaft 13. The roller 14 and a pair of follower rollers (step rollers) 15 provided rotatably on the step body 12 are provided.

  In the truss 1 (FIG. 1), a pair of drive roller guide rails 16 for guiding the drive roller 14 and a pair of follower roller guide rails 17 for guiding the follower roller 15 are arranged. When each step 9 is moved along the circulation path, the drive roller 14 is guided to the drive roller guide rail 16 and the follower roller 15 is guided to the follower roller guide rail 17. That is, each step 9 is moved along the circulation path while being guided by the drive roller guide rail 16 and the follower roller guide rail 17.

  Each driving roller guide rail 16 includes a lower restricting portion 16a that restricts the downward displacement of the driving roller 14, an upper restricting portion 16b that restricts the upward displacement of the driving roller 14, and the lower restricting portion 16a and the upper restricting portion. It has the connection part 16c which connects between the parts 16b. Accordingly, each drive roller 14 is restricted from being displaced in the vertical direction with respect to the drive roller guide rail 16. Each of the driving rollers 14 in the normal state is placed and guided on the lower regulating portion 16a.

  Each of the follower roller guide rails 17 includes a lower restricting portion 17a that restricts the downward displacement of the follower roller 15, and a vertical portion 17b that is provided perpendicular to the edge of the lower restricting portion 17a. Therefore, each follower roller 15 is restricted only in a downward displacement with respect to the follower roller guide rail 17. Each normal follower roller 15 is placed and guided on the lower regulating portion 17a.

  Here, when each step 9 is moved on the return side lower end transition portion, each step 9 adjacent to each other is displaced in the vertical direction, so that foreign matters such as coins that fall into the truss 1 are placed between the steps 9. It becomes easy to get caught. When a foreign object is caught between the steps 9, some of the steps 9 may be lifted.

  FIG. 4 is an enlarged view showing a state in which a part of the steps 9 is lifted up with foreign matter sandwiched between the steps 9 of FIG. In the drawing, when the foreign matter 18 is sandwiched between the steps 9 adjacent to each other and the step 9 is lifted, the follower roller 15 is separated upward from the follower roller guide rail 17 (floats). ).

  When each step 9 is moved with foreign matter 18 sandwiched between the steps 9, each step 9 is moved along the return side lower end transition portion while the follower roller 15 is separated from the follower roller guide rail 17. It will be.

  Accordingly, an abnormality detecting device 21 for detecting whether the follower roller 15 is separated from the follower roller guide rail 17 is provided on any one of the follower roller guide rails 17 via the plate-like mounting member 20. It has been. The abnormality detection device 21 detects whether the follower roller 15 is separated from the follower roller guide rail 17 when each step 9 is moved along the return path lower end transition portion.

  The abnormality detection device 21 includes a rod-shaped movable piece (displacement body) 22 that can be displaced with respect to the follower roller guide rail 17 and a biasing spring 23 that biases the movable piece 22 in a direction approaching the follower roller guide rail 17. And a stopper 24 for restricting the displacement of the movable piece 22 in the direction approaching the follower roller guide rail 17 and a detection switch 25 for detecting the displacement of the movable piece 22 in the direction away from the follower roller guide rail 17. is doing.

  The movable piece 22 is displaceable between a normal position where the distance from the lower restricting portion 17a is a predetermined value and a detection position farther from the follower roller guide rail 17 than the normal position. In this example, the movable piece 22 is displaced with respect to the attachment member 20 to be displaced between the normal position and the detection position. The movable piece 22 is disposed above the follower roller guide rail 17. Accordingly, the movable piece 22 is displaced from the normal position to the detection position by being displaced upward. Furthermore, the movable piece 22 is disposed so as to intersect the length direction of the guide roller guide rail 17.

  The position of the movable piece 22 in the length direction of the follower roller guide rail 17 is within a section where the follower roller 15 passes when the step 9 is moved on the return path lower end transition portion (return path lower detection position setting section). It is set at a predetermined position. That is, when the follower roller 15 passes between the movable piece 22 and the follower roller guide rail 17, the step 9 is moved in the return side lower end transition portion (FIGS. 2 and 4).

  The distance between the movable piece 22 and the lower regulating portion 17a when in the normal position is larger than the outer diameter of the follower roller 15. That is, when the movable piece 22 is in the normal position and the follower roller 15 is rolled while being in contact with the follower roller guide rail 17, the follower roller 15 is not in contact with the movable piece 22 (that is, the movable piece 22). It passes between the movable piece 22 and the lower restricting portion 17a. The movable piece 22 is held at the normal position by contacting the stopper 24.

  The detection switch 25 detects whether or not the movable piece 22 is displaced to the detection position. The detection switch 25 outputs a detection signal when detecting the displacement of the movable piece 22 to the detection position, and stops outputting the detection signal when the position of the movable piece 22 is out of the detection position.

  When the step 9 is moved on the return path side lower end transition portion while the follower roller 15 is separated from the follower roller guide rail 17, the movable piece 22 is pushed by the follower roller 15, whereby the biasing spring 23 is attached. Against the force, it is displaced in the direction away from the follower roller guide rail 17 (upward). That is, the movable piece 22 is pushed by the follower roller 15 from the normal position to the detection position when the step 9 is moved along the return path lower end transition portion while the follower roller 15 is separated from the follower roller guide rail 17. Displaced.

  The abnormality detection device 21 detects the separation of the follower roller 15 from the follower roller guide rail 17 when the detection switch 25 detects the displacement of the movable piece 22 to the detection position.

  FIG. 5 is an enlarged view showing a portion V in FIG. FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. In addition, the return part upper end transition part is shown by the V part of FIG. In the figure, an abnormality detecting device 31 for detecting whether or not the follower roller 15 is separated from the follower roller guide rail 17 is provided on any one of the follower roller guide rails 17 via a plate-like mounting member 30. Is provided. The abnormality detection device 31 detects whether or not the follower roller 15 is separated from the follower roller guide rail 17 when each step 9 is moved along the return path side upper end transition portion.

  The abnormality detection device 31 includes a rod-shaped movable piece (displacement body) 32 that is displaceable with respect to the follower roller guide rail 17 and a biasing spring 33 that biases the movable piece 32 in a direction approaching the follower roller guide rail 17. And a stopper 34 for restricting the displacement of the movable piece 32 in the direction approaching the follower roller guide rail 17 and a detection switch 35 for detecting the displacement of the movable piece 32 in the direction away from the follower roller guide rail 17. is doing.

  The movable piece (displacement body) 32, the urging spring 33, the stopper 34, and the detection switch 35 are respectively constituted by the movable piece (displacement body) 22, the urge spring 23, the stopper 24, and the detection switch 25. It is the same.

  The position of the movable piece 32 with respect to the length direction of the follower roller guide rail 17 is within a section where the follower roller 15 passes when the step 9 is moved on the return path upper end transition portion (return path upper side detection position setting section). It is set at a predetermined position. That is, when the follower roller 15 passes between the movable piece 32 and the follower roller guide rail 17, the step 9 is moved in the return path side upper end transition portion (FIG. 2).

  When each step 9 is moved along the return-side upper end transition portion, as in the case where the return-side lower end transition portion is moved, a part of the steps 9 is caused by foreign matter being caught between the adjacent steps 9. May rise and the follow-up roller 15 may be separated upward (lifted) with respect to the follow-up roller guide rail 17.

  When the step 9 is moved on the return path side upper end transition portion while the follower roller 15 is separated from the follower roller guide rail 17, the movable piece 32 is pushed by the follower roller 15, thereby attaching the biasing spring 33. Against the force, it is displaced in a direction (upward) away from the follower roller guide rail 17. That is, the movable piece 32 is pushed by the follower roller 15 from the normal position to the detection position when the step 9 is moved on the return path side upper end transition portion while the follower roller 15 is separated from the follower roller guide rail 17. Displaced.

  The abnormality detection device 31 detects the separation of the follower roller 15 from the follower roller guide rail 17 when the detection switch 35 detects the displacement of the movable piece 32 to the detection position.

  Information from each of the detection switches 25 and 35 is transmitted to a control device (not shown). The control device controls the operation of the escalator based on information from the detection switches 25 and 35. In this example, the control device stops the operation of the escalator when receiving a detection signal from at least one of the detection switches 25 and 35, and the reception of the detection signal from each of the detection switches 25 and 35 If the escalator is also stopped, the escalator operation is continued.

  Next, the operation will be described. During normal times when no foreign matter 18 is sandwiched between the steps 9, the steps 9 are moved along the circulation path while being guided by the driving roller guide rails 16 and the follower roller guide rails 17. At this time, the follower roller 15 does not come into contact with the movable pieces 22 and 32, and the movable pieces 22 and 32 remain held at the normal positions.

  For example, when each step 9 is moved along the return path lower end transition portion while the escalator is being lowered, the step 9 on the front side in the moving direction is displaced upward with respect to the step 9 on the rear side in the moving direction. (Fig. 2). Therefore, at this time, if the foreign object 18 is caught between the front step 9 and the rear step 9, the rear step 9 is lifted by the upward displacement of the front step 9. As a result, the follower roller 15 of the rear step 9 is separated upward from the follower roller guide rail 17 (FIG. 4).

  Thereafter, when the step 9 is moved while the follower roller 15 is separated from the follower roller guide rail 17 and the follower roller 15 reaches the position of the movable piece 22, the follower roller 15 comes into contact with the movable piece 22. Thereby, the movable piece 22 is pushed up against the biasing force of the biasing spring 23. That is, the movable piece 22 is displaced from the normal position to the detection position.

  When the movable piece 22 is displaced to the detection position, a detection signal is output from the detection switch 25 to the control device, and the operation of the escalator is stopped by the control of the control device.

  Also, for example, when each step 9 is moved on the return path side upper end transition portion in a state where the escalator is being lifted, the step 9 on the front side in the moving direction moves downward with respect to the step 9 on the rear side in the moving direction. It is moved while being displaced (FIG. 5). Accordingly, at this time, if a foreign object is caught between the front step 9 and the rear step 9, the front step 9 is lifted by the downward displacement of the front step 9. As a result, the follower roller 15 of the front step 9 is separated upward from the follower roller guide rail 17.

  Thereafter, when the step 9 is moved while the follower roller 15 is separated from the follower roller guide rail 17 and the follower roller 15 reaches the position of the movable piece 32, the follower roller 15 comes into contact with the movable piece 32. Thereby, the movable piece 32 is pushed up against the biasing force of the biasing spring 33. That is, the movable piece 32 is displaced from the normal position to the detection position.

  When the movable piece 32 is displaced to the detection position, a detection signal is output from the detection switch 35 to the control device, and the operation of the escalator is stopped by the control of the control device.

  In such an escalator, when each step 9 is moved on each of the return side upper end transition part and the return side lower end transition part, the abnormality detection devices 21 and 31 detect whether or not the follower roller 15 is lifted. Therefore, it is possible to detect whether or not the follower roller 15 is lifted at the return side upper end transition portion and the return side lower end transition portion in which the lift of the follower roller 15 easily occurs in the return path 11. The occurrence of lifting can be detected early and more reliably. Therefore, it is possible to more surely prevent problems that occur when each step 9 is moved along the return path 11 while the follower roller 15 is lifted (for example, damage to equipment in the truss 1 due to the collision of the step 9). Can do.

  The abnormality detection devices 21 and 31 detect the upward movement of the movable pieces 22 and 32 and the movable pieces 22 and 32 that are pushed upward by the follower roller 15 separated from the follower roller guide rail 17 and displaced upward. Therefore, the presence / absence of the separation of the follower roller 15 from the follower roller guide rail 17 can be detected with a simple configuration.

  Further, since the movable pieces 22 and 32 are arranged to intersect with the length direction of the follower roller guide rail 17, when the follower roller 15 is separated from the follower roller guide rail 17, The follower roller 15 can be more reliably brought into contact with the movable pieces 22 and 32, and erroneous detection of the abnormality detection devices 21 and 31 can be prevented.

  In the above example, when each step 9 is moved along the return path lower end transition portion, the abnormality detection device 21 that detects the lift of the follower roller 15 and when each step 9 is moved along the return path upper end transition portion. The abnormality detection device 31 that detects the lifting of the follow-up roller 15 is used for the escalator, but only one of the abnormality detection device 21 and the abnormality detection device 31 is used for the escalator, and each step 9 is on the return side. When only one of the lower end transition part and the return path side upper end transition part is moved, the lift of the follow-up roller 15 may be detected.

Embodiment 2. FIG.
FIG. 7 is a side view showing a return side lower end transition portion of an escalator according to Embodiment 2 of the present invention. In the figure, one of the follower roller guide rails 17 is provided with an abnormality detecting device 41 for detecting whether or not the follower roller 15 is separated from the follower roller guide rail 17. The abnormality detection device 41 detects whether or not the follower roller 15 is separated from the follower roller guide rail 17 when each step 9 is moved along the return path lower end transition portion.

  FIG. 8 is an enlarged view showing a portion VIII in FIG. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. In the figure, the abnormality detection device 41 is attached to the guide roller guide rail 17 via a plurality of (two in this example) attachment members 39 and 40. The attachment members 39 and 40 are arranged at intervals in the length direction of the follower roller guide rail 17.

  The abnormality detection device 41 includes a movable rail (displacement body) 42 that is displaceable with respect to the follower roller guide rail 17 and a pair of urging springs 43 that urge the movable rail 42 in a direction approaching the follower roller guide rail 17. A pair of restricting members 44 that restrict the displacement of the movable rail 42 in the direction approaching the follower roller guide rail 17, and a detection switch 45 that detects the displacement of the movable rail 42 in the direction away from the follower roller guide rail 17. And have.

  The movable rail 42 is disposed along the follower roller guide rail 17. The length of the movable rail 42 is a predetermined length set in advance. The movable rail 42 has a rail horizontal portion 42a that faces the lower regulating portion 17a, and a rail vertical portion 42b that is provided perpendicular to the edge of the rail horizontal portion 42a. Further, the movable rail 42 is displaceable between a normal position where the distance between the lower restricting portion 17a and the rail horizontal portion 42a is a predetermined value and a detection position farther from the follower roller guide rail 17 than the normal position. It has become.

  The position of the movable rail 42 with respect to the length direction of the follower roller guide rail 17 is within a section where the follower roller 15 passes when the step 9 is moved on the return path lower end transition part (return path lower detection position setting section). It is set at a predetermined position. That is, when the follower roller 15 passes between the movable rail 42 and the follower roller guide rail 17, the step 9 is moved in the return path lower end transition portion (FIG. 7).

  One restriction member 44 is fixed to the attachment member 39, and the other restriction member 44 is fixed to the attachment member 40. In addition, a pair of contact members 46 that can be brought into contact with and separated from each regulating member 44 are fixed to both ends of the movable rail 42. Each abutting member 46 is urged by each urging spring 43 in a direction in which it abuts against each regulating member 44. The displacement of the movable rail 42 in the direction approaching the follower roller guide rail 17 is restricted by the contact members 46 coming into contact with the restriction members 44. The movable rail 42 is held in the normal position when each contact member 46 is in contact with each regulating member 44.

  The distance between the rail horizontal portion 42a and the lower restricting portion 17a when the movable rail 42 is at the normal position is larger than the outer diameter of the follower roller 15. That is, when the movable rail 42 is in the normal position and the follower roller 15 is rolled while being in contact with the follower roller guide rail 17, the follower roller 15 is not in contact with the movable rail 42 (that is, the movable rail 42). It is configured to pass between the rail horizontal portion 42a and the lower restricting portion 17a.

  The detection switch 45 is fixed to one mounting member 39. An operation member 47 for operating the detection switch 45 by a displacement of the movable rail 42 with respect to the follower roller guide rail 17 is fixed to an intermediate portion of the movable rail 42.

  The detection switch 45 detects the displacement of the movable rail 42 to the detection position by operating the operation member 47. The detection switch 45 outputs a detection signal when the displacement of the movable rail 42 to the detection position is detected, and stops outputting the detection signal when the movable rail 42 is out of the detection position.

  When the step 9 is moved along the return path lower end transition portion while the follower roller 15 is separated from the follower roller guide rail 17, the movable rail 42 is pushed by the follower roller 15, thereby Against the biasing force, it is displaced in a direction away from the follower roller guide rail 17 (upward). That is, the movable rail 42 is pushed by the follower roller 15 from the normal position to the detection position when the step 9 is moved along the return path lower end transition portion while the follower roller 15 is separated from the follower roller guide rail 17. Displaced.

  The abnormality detection device 41 detects the separation of the follower roller 15 from the follower roller guide rail 17 when the detection switch 45 detects the displacement of the movable rail 42 to the detection position.

  When the movable rail 42 is pressed by the follower roller 15, the follower roller 15 is rolled while being in contact with the rail horizontal portion 42a. Thereby, the presence or absence of separation of the follower roller 15 from the follower roller guide rail 17 is detected within the range of the length of the movable rail 42 (within a predetermined range).

  FIG. 10 is a side view showing the return path side upper end transition portion of the escalator according to the second embodiment of the present invention. In the drawing, one of the following roller guide rails 17 is provided with an abnormality detecting device 51 that detects whether the following roller 15 is separated from the following roller guide rail 17. The abnormality detection device 51 detects whether the follower roller 15 is separated from the follower roller guide rail 17 when each step 9 is moved along the return path side upper end transition portion.

  FIG. 11 is an enlarged view showing a portion XI in FIG. FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. In the figure, the abnormality detection device 51 is attached to the guide roller guide rail 17 via a plurality of (two in this example) attachment members 49 and 50. The attachment members 49 and 50 are arranged at intervals in the length direction of the follower roller guide rail 17.

  The abnormality detection device 51 includes a movable rail (displacement body) 52 that can be displaced with respect to the follower roller guide rail 17 and a pair of urging springs 53 that urge the movable rail 52 in a direction approaching the follower roller guide rail 17. A pair of regulating members 54 that regulate the displacement of the movable rail 52 in the direction approaching the follower roller guide rail 17, and the detection switch 55 that detects the displacement of the movable rail 52 in the direction away from the follower roller guide rail 17. And have.

  The movable rail 52 is arranged along the guide rail 17 for the follower roller. The length of the movable rail 52 is a predetermined length set in advance. The movable rail 52 has a rail horizontal portion 52a that faces the lower regulating portion 17a, and a rail vertical portion 52b that is provided perpendicular to the edge of the rail horizontal portion 52a.

  The position of the movable rail 52 in the length direction of the follower roller guide rail 17 is within a section where the follower roller 15 passes when the step 9 is moved on the return path side upper end transition part (return path side upper detection position setting section). It is set at a predetermined position. That is, when the follower roller 15 passes between the movable rail 52 and the follower roller guide rail 17, the step 9 is moved in the return path side upper end transition part (FIG. 10).

  The other configuration of the movable rail 52 is the same as the configuration of the movable rail 42. The respective configurations of the respective biasing springs 53, the respective regulating members 54, and the detection switches 55 are the same as the respective configurations of the respective biasing springs 43, the respective regulating members 44, and the detection switch 45.

  One restriction member 54 and the detection switch 55 are fixed to the attachment member 49, and the other restriction member 54 is fixed to the attachment member 50. A pair of abutting members 56 that can be brought into and out of contact with the respective regulating members 54 are fixed to both ends of the movable rail 52. An operation member 57 for operating the detection switch 55 by a displacement of the movable rail 52 relative to the follower roller guide rail 17 is fixed to an intermediate portion of the movable rail 52. The configuration of each contact member 56 and operation member 57 is the same as the configuration of each contact member 46 and operation member 47.

  When the step 9 is moved on the return path side upper end transition portion while the follower roller 15 is separated from the follower roller guide rail 17, the movable rail 52 is pushed by the follower roller 15, thereby Against the biasing force, it is displaced in a direction away from the follower roller guide rail 17 (upward). That is, the movable rail 52 is pushed by the follower roller 15 from the normal position to the detection position when the step 9 is moved on the return path side upper end transition portion while the follower roller 15 is separated from the follower roller guide rail 17. Displaced.

  Information from each of the detection switches 45 and 55 is transmitted to a control device (not shown). The control device controls the operation of the escalator based on information from the detection switches 45 and 55. In this example, the control device stops the operation of the escalator when receiving a detection signal from at least one of the detection switches 45 and 55, and the reception of the detection signal from each of the detection switches 45 and 55 If the escalator is also stopped, the escalator operation is continued. Other configurations are the same as those in the first embodiment.

  In such an escalator, the displacement bodies that can be displaced with respect to the follower roller guide rail 17 are the movable rails 42 and 52 arranged along the follower roller guide rail 17. The presence or absence of separation from the guide rail 17 can be detected continuously within the range of the length of the movable rails 42 and 52. Thereby, it is possible to more reliably detect the rising of each step 9 moved along the return path 11.

In the above example, when each step 9 is moved along the return path lower end transition portion, the abnormality detection device 41 that detects the lifting of the follower roller 15 and when each step 9 is moved along the return path upper end transition portion. The abnormality detecting device 51 that detects the lifting of the follow-up roller 15 is used for the escalator. However, only one of the abnormality detecting device 41 and the abnormality detecting device 51 is used for the escalator, and each step 9 is returned to the return side. When only one of the lower end transition part and the return path side upper end transition part is moved, the lift of the follow-up roller 15 may be detected.

Claims (4)

A plurality of steps having step rollers and being moved along an endless circulation path;
A guide rail for guiding the step roller, and an abnormality detecting device for detecting whether the step roller is separated from the guide rail,
The circulation path has an outward path and a return path located below the outward path,
The return side path has a return side transition portion that moves while the steps adjacent to each other are displaced in the vertical direction.
The abnormality detection device detects whether or not the step roller is separated from the guide rail when the step is moved on the return side transition portion.   The abnormality detecting device includes a displacement body that is pushed by the step roller when being separated from the guide rail and displaced in a direction away from the guide rail, and a displacement of the displacement body in a direction away from the guide rail. 2. The detection switch according to claim 1, wherein the detection switch detects a displacement of the displacement body to detect the separation of the step roller from the guide rail. Passenger conveyor.   The safety device for a passenger conveyor according to claim 2, wherein the displacement body is a rod-shaped movable piece arranged so as to intersect with the length direction of the guide rail. The safety device for a passenger conveyor according to claim 2, wherein the displacement body is a movable rail disposed along the guide rail.

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