JP2007076823A - Abnormality detection device for step and passenger conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormality detection device for a step capable of improving attaching workability by reducing the number of expensive limit switches and detecting abnormality of the step other than damage of a rear wheel roller on a going passage side. <P>SOLUTION: This abnormality detection device for the step is provided with a detection shaft member 21 composed of a bar-like member extending in the direction crossing the direction of advance of the step 10 orthogonally and provided turnably by using the longitudinal direction as a rotation axis below the step 10 on a going passage side in a truss 1. A plurality of detection pieces 23 to 25 whose tip parts approach and come into contact with step constituent members provided in end parts on both sides of the step on the going passage side and in the vicinity of left and right step rollers are protrudedly provided on an outer peripheral face of the detection shaft member 21. A cam 26 is attached to the detection shaft member 21 on the same shaft axis. The limit switch 27 provided with an operation piece 27a coming into contact with the cam 26 is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an abnormality detection device capable of detecting an abnormality in which a step of a passenger conveyor such as an escalator or a moving sidewalk sinks due to breakage or dropping of a step roller, and a passenger conveyor provided with the abnormality detection device.

  The passenger conveyor includes a plurality of steps having step rollers at both ends. The plurality of steps are connected by an endless step chain and circulate between one entrance and the other entrance in the truss. A guide rail is provided along the moving direction of the step chain, and the step roller of each step rolls on the guide rail to guide the movement of the step.

  Due to the life of the step rollers and other reasons, the step rollers may be damaged during operation of the passenger conveyor. Such a breakage of the step roller is not preferable for safety. Therefore, when the step roller is damaged, it is desired to detect the damage promptly and stop the operation of the passenger conveyor.

  As a conventionally known step roller abnormality detection device, there is a safety device that detects the sinking of a step due to the breakage of the step roller. An example of this safety device will be described with reference to FIGS. FIG. 3 is an explanatory view of a main part in the vicinity of a step in a truss for explaining a conventional safety device. FIG. 4 is an explanatory view of a main part near the rear wheel roller of the step shown in FIG.

  The step 10 includes a step plate 11 and a riser 12, and these step plate 11 and riser 12 are fixed to a step frame 13. Further, a front wheel roller 14 as a step roller is rotatably attached to the front side of the step frame 13, and a rear wheel roller 15 as a step roller is rotatably attached to the rear side of the step frame 13. . The rear wheel roller 15 rolls on the guide rail 2, and similarly, the front wheel roller 14 rolls on another guide rail (not shown). In order to detect the breakage of the rear wheel roller 15, a safety device is provided on the lower side of the step frame 13 that holds the rotating shaft of the rear wheel roller 15.

  The safety device includes a support member 31 attached and fixed to the guide rail 2, a detection piece 32 supported by the support member 31 and provided in the vicinity of the step frame, and the detection piece 32 connected to the support member 31. A rotary shaft member 33 that is movably attached, and a limit switch 34 provided on the support member 31 so that the operating piece is in contact with one end of the detection piece 32 are provided. When the detection piece 32 rotates, the limit switch 34 is moved in parallel in one direction so that the limit switch 34 operates. The limit switch 34 is connected to an operation control device (not shown), and this operation control device can stop the operation of the passenger conveyor by the operation of the limit switch. In addition, the limit switch 34 is provided with a lock device 35 in order to maintain a state in which the limit switch 34 is operated.

  The illustrated safety device is provided in a plurality corresponding to each of the left and right rear wheel rollers 15 so that the breakage of the rear wheel rollers 15 provided on the left and right sides of the step 10 can be individually detected. In addition, in the advancing direction of the step 10 in a truss, it is provided in the vicinity of the comb part provided in the entrance / exit.

  The operation of such a safety device will be described. In a steady state, the detection piece 32 of the safety device is not in contact with the step frame 13 that holds the rotating shaft of the rear wheel roller 15, and the limit switch does not operate. On the other hand, when the rear wheel roller 15 is damaged, the step 10 sinks on the damaged roller side, so that the detection piece 32 of the safety device moves to the rear wheel as the step 10 moves on the guide rail 2. A portion of the step frame 13 that holds the rotation shaft of the roller 15 is brought into contact with the step frame 13 and rotated about the rotation shaft member 33. Then, the operating piece of the limit switch 34 in contact with the detection piece 32 moves and the limit switch 34 is operated. When the limit switch 34 is actuated, an operation stop signal is output to an operation control device (not shown), and the operation control device outputs a stop signal to a drive device that applies a driving force to the step chain connecting the steps 10. Stop.

  In the safety device for detecting the breakage of the rear wheel roller 15 described above, the left and right rear wheel rollers 15 are provided with safety devices so that the breakage of the left and right rear wheel rollers 15 can be detected. The limit switch 34 of the safety device is a factor for increasing the cost, and in order to easily and quickly install the safety device on the passenger conveyor, the number of limit switches is small and the step is damaged. Is required to be detected. The limit switch 34 used in the safety device is a lock that prevents the operating piece from automatically returning after detecting the breakage of the step in order to stop the operation of the passenger conveyor until the operator replaces the rear wheel roller. It is necessary to use an expensive device provided with the device 35, and this also causes an increase in cost.

  Further, the conventional safety device can detect the breakage of only the rear wheel roller on the forward path side, and cannot detect the breakage of the front wheel roller 14 or the like.

  The present invention advantageously solves the above-mentioned problems, can reduce the number of expensive limit switches and improve the mounting workability, and is not abnormal in steps other than the breakage of the rear wheel roller on the forward path side. It is an object of the present invention to provide a step abnormality detecting device capable of detecting a passenger and a passenger conveyor equipped with the step abnormality detecting device.

  The step abnormality detecting device of the present invention is formed of a rod-like member extending below the step on the forward path side in the truss in a direction perpendicular to the traveling direction of the step, and is provided to be rotatable about the longitudinal direction as a rotation axis. A plurality of detections in which the tip end is close to the step constituent members in the vicinity of the left and right step rollers provided on the both ends of the forward step on the outer side of the detection shaft. It comprises a piece, a cam attached to the detection shaft material on the same axis, and a limit switch in contact with the operating piece.

  The passenger conveyor according to the present invention is provided along a step having step rollers on both ends, an endless step chain connecting the plurality of steps, and a moving direction of the step chain, A guide rail that is mounted so as to be able to roll and guides the movement of the step, and a device that detects an abnormality of the step, in a direction orthogonal to the traveling direction of the step below the step on the forward path side. A detection shaft made of an extending rod-like member and rotatably provided with the longitudinal direction as a rotation axis, and protruded on the outer peripheral surface of the detection shaft, and is provided at both end portions of the forward path side step. A step having a plurality of detection pieces whose tip portions are close to the step components near the left and right step rollers, a cam attached to the detection shaft material on the same axis, and a limit switch in contact with the operation piece. Abnormality detection device Characterized in that it comprises a.

  According to the step abnormality detecting device of the present invention, the abnormality of the left and right step rollers can be detected by a single limit switch, and the abnormality detecting device has a simplified configuration with a reduced number of parts. Can be improved. Further, not only the rear wheel roller but also abnormalities such as the front wheel roller can be detected.

  Moreover, since the passenger conveyor of this invention is equipped with the step abnormality detection apparatus mentioned above, the abnormality of a step can be detected rapidly and the operation of a passenger conveyor can be stopped.

Example 1
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a step abnormality detecting device and a passenger conveyor equipped with the step abnormality detecting device of the present invention will be described with reference to the drawings.

  FIG. 1 is a view of an escalator truss as an example of a passenger conveyor provided with a step abnormality detection device according to the present invention, cut from the entrance and exit and viewed from the front. In FIG. 1, a guide rail 2 is attached and fixed in the truss 1, and forward and return steps 10 guided by the guide rail 2 are disposed.

  The step 10 on which the passenger rides has a step plate 11 and a riser 12, and these step plate 11 and riser 12 are fixed to the step frame 13. Further, a front wheel roller 14 as a step roller is rotatably attached to the front side of the step frame 13, and a rear wheel roller 15 as a step roller is rotatably attached to the rear side of the step frame 13. . A total of four step rollers are attached to the step 10 by the left and right front wheel rollers 14 and the left and right rear wheel rollers 15 with the step frame 13 at the center, and these step rollers roll on the guide rail 2. The step 10 moves in the truss 1.

  The left and right front wheel rollers 14 are attached to a common rotary shaft 16 as shown on the return side step 10 side located below the forward step 10, and the rotary shaft 16 is connected to the rotary shaft 16. It is detachably attached to and fixed to the step frame 13 via a collar 17 as a cylindrical fixing member that is slidably attached to the outer peripheral surface in the axial direction. A pin 18 for locking the movement of the collar 17 in the axial direction is provided at a portion where the rotary shaft 16 is attached to the step frame 13.

  A step chain 3 is provided in the vicinity of the side surfaces of the left and right front wheel rollers 14. The rotating shaft of the front wheel roller 14 of each step passes through the step chain 3, and the step 10 moves on the guide rail 2 as the step chain 3 circulates.

  The left and right rear wheel rollers 15 are attached to individual rotating shafts, and the rotating shafts are attached and fixed to the rear side of the step frame 13.

  An abnormality detection device is provided to detect an abnormality such as the sinking or dropping of the step 10. In this embodiment shown in FIG. 1, as one of the members provided in this abnormality detection device, a rod-like detection extending below the step 10 on the forward path side in the truss 1 and extending in a direction perpendicular to the traveling direction of the step 10. A shaft member 21 is provided. The length of the detection shaft 21 is longer than the distance between the left and right front wheel rollers 14 in the illustrated example, and both ends of the detection shaft 21 are rotatably supported by support members 22 connected to the truss 1. Thus, the detection shaft member 21 is rotatable in a direction parallel to the traveling direction of the step 10. The support member 22 may support the detection shaft member 21 so that the detection shaft member 21 can be pivoted. Alternatively, the support member 22 may be provided with a bearing that supports the detection shaft member 21.

  On the outer peripheral surface of the detection shaft member 21, stud bolts 23 to 25 as detection pieces are provided so as to project toward the step. Among these, the left and right stud bolts 23 are for detecting that the rear wheel roller 15 on the forward path is damaged or dropped and the step 10 sinks, and the rear wheel rollers 15 on the forward path side. The amount of protrusion from the detection shaft member 21 is fixed to a step frame 13 that fixes the rotation shaft of the stud shaft 23 so that the tip of each stud bolt 23 can be adjusted with a nut.

  Further, the left and right stud bolts 24 are for detecting the lifting of the rear wheel roller 15 on the return path side, and each stud is attached to the step frame 13 that fixes the rotation shaft of the rear wheel roller 15 on the return path side step 10. The amount of protrusion from the detection shaft 21 is fixed with a nut so that the tip of the bolt 24 is close to the bolt 24. The stud bolt 24 also serves as a weight for positioning the forward-side stud bolt 23 above the detection shaft 21.

  The left and right stud bolts 25 are for detecting that the front wheel roller 14 on the forward path side is broken or sinks due to dropping off. The stud bolts 25 are connected to the rotating shaft 16 connecting the left and right front wheel rollers 14. The projecting amount from the detection shaft member 21 is fixed so that it can be adjusted with a nut so that the front end portions of the detection shafts are close to each other. The left and right stud bolts 25 shown in the figure are provided close to the collar 17 of the rotating shaft 16. If the collar 17 moves toward the center in the axial direction during operation for some reason, The collar 17 is in contact with the tip.

  A limit switch 27 is provided at one end portion of the detection shaft member 21 to which the stud bolts 23 to 25 are attached via a cam 26 fixed to the detection shaft member 21. The cam 26 and limit switch 27 will be described more specifically with reference to FIG.

  FIG. 2 is an explanatory view of a main part when the detection shaft 21 provided with the cam 26 and the limit switch 27 is viewed from the axial direction. FIG. 2 shows a stud bolt 25 protruding from the outer periphery of the detection shaft member 21 as one of the detection pieces already described. The tip of the stud bolt 25 is provided close to the rotary shaft 16 attached to the front side of the step frame 13 of the forward step 10. The rotary shaft 16 is attached to the step frame 13 via a collar 17, and the collar 17 is locked in movement in the axial direction by a pin 18. The stud bolt 25 is disposed so that the outer periphery of the collar 17 contacts the tip of the stud bolt 25 when the locking by the pin 18 is released due to some abnormality and the collar 17 moves in the axial direction.

  The cam 26 is fixed to the outer peripheral portion of the detection shaft 21 and is provided at one end of the detection shaft 21, for example. The cam 26 has a substantially circular cross section that is the same axis as that of the detection shaft member 21, and has a groove 26 a at one location on the outer periphery.

  The limit switch 27 is provided close to the cam 26, and is attached and fixed to, for example, a support member 22 that rotatably supports the end portion of the detection shaft member 21. The operating piece 27a of the limit switch 27 is in contact with the groove portion 26a of the cam 26 at the normal time. Then, when the detection shaft 21 rotates about the axis, the cam 26 fixed to the detection shaft 21 also rotates, the operating piece 27a of the limit switch 27 comes off from the groove 26a, and the operating piece 27a becomes the detection shaft. The limit switch 27 is activated by being pushed outward in the radial direction 21. Since the cam 26 is provided with only one groove portion 26a, after the operating piece 27a is once pushed outward in the radial direction of the detection shaft 21 by the rotation of the cam 26, the operating piece 27a is formed in the groove portion 26a. It does not return, and the operating state of the limit switch 27 is maintained until the worker performs the return operation.

  In the step abnormality detecting device including the members described above, the groove portion of the cam 26 in which the operating piece 27a of the limit switch 27 for detecting the abnormality is fixed to the detection shaft member 21 in a steady state where the step abnormality does not occur. The limit switch 27 is not operating.

  For example, when the rear wheel roller 15 on the forward path side is damaged or dropped, the step frame 13 to which the rotating shaft of the rear wheel roller 15 is attached and fixed sinks, so that the step frame 13 contacts the stud bolt 23. The stud bolt 23 and the detection shaft member 21 on which the stud bolt 23 is projected rotate with the detection shaft member 21 as a rotation axis. As the detection shaft 21 rotates, the cam 26 fixed to the end of the detection shaft 21 rotates, and the operating piece 27a of the limit switch 27 that is in contact with the groove 26a of the cam 26 is detached from the groove 26a. The operating piece 27a is pushed outward in the radial direction of the detection shaft member 21, and the limit switch 27 is operated. By operating the limit switch 27, an operation stop signal is output to an operation control device (not shown), and the operation control device outputs a stop signal to a drive device that applies driving force to the step chain 3 connecting the steps 10. To stop operation.

  Further, when the front wheel roller 14 on the forward path side is damaged or dropped, the common rotating shaft 16 to which the front wheel roller 14 is attached sinks, so that the rotating shaft 16 contacts the stud bolt 25. Therefore, similarly to the case where the rear wheel roller 15 is broken or dropped, the stud bolt 25 and the detection shaft member 21 on which the stud bolt 25 is projected rotate with the detection shaft member 21 as the rotation shaft. As the detection shaft 21 rotates, the cam 26 fixed to the end of the detection shaft 21 rotates, and the operating piece 27a of the limit switch 27 that is in contact with the groove 26a of the cam 26 is detached from the groove 26a. The operating piece 27a is pushed outward in the radial direction of the detection shaft member 21, and the limit switch 27 is operated.

  Further, when the rear wheel roller 15 on the return path is lifted for some reason, the step frame 13 to which the rotating shaft of the rear wheel roller 15 is fixed is lifted, so that the step frame 13 comes into contact with the stud bolt 24. Therefore, similarly to the case where the rear wheel roller 15 described above is damaged or dropped, the stud bolt 24 and the detection shaft member 21 on which the stud bolt 24 protrudes rotate around the detection shaft member 21 as a rotation axis. As the detection shaft 21 rotates, the cam 26 fixed to the end of the detection shaft 21 rotates, and the operating piece 27a of the limit switch 27 that is in contact with the groove 26a of the cam 26 is detached from the groove 26a. The operating piece 27a is pushed outward in the radial direction of the detection shaft member 21, and the limit switch 27 is operated.

  In this way, in the abnormality detection device of the present embodiment, any of the left and right forward-side rear wheel rollers 15, the left and right forward-side front wheel rollers 14, and the left and right return-side rear wheel rollers 15 is damaged or dropped. In this case, since the limit switch 27 is operated by the rotation of the detection shaft member 21 on which the left and right stud bolts 23, the left and right stud bolts 25 and the left and right stud bolts 24 are protruded, one limit switch 27 is provided. It is sufficient that the minimum number of limit switches 27 damage or drop off the left and right forward-side rear wheel rollers 15, the left and right forward-side front wheel rollers 14, and the left and right return-side rear wheel rollers 15. Can be detected.

  In addition, since the device that detects the breakage of these step rollers, etc. is unitized, the number of parts is reduced, the structure is simplified, the installation work can be performed easily and in a short time, and the installation work efficiency is improved. Can be improved.

  In addition, the abnormality detection device of the present embodiment can detect not only the breakage and dropout of the forward-side rear wheel roller 15 as in the prior art, but also the breakage and dropout of the forward-side front wheel roller 14. Further, it is possible to detect the lift of the rear wheel roller on the return path side. Accordingly, when a step abnormality occurs, the abnormality can be detected more quickly than the detection device used in the conventional safety device, and the operation of the passenger conveyor can be stopped.

  In addition, the abnormality detection device of this embodiment not only detects the breakage of the front wheel roller 14 and the breakage of the rear wheel roller, but the collar 17 that fixes the rotating shaft 16 of the front wheel roller 14 to the step frame 13 has a defective pin 18. Since the stud bolt 25 can detect that the pin 18 has been moved in the axial direction of the rotating shaft 16 due to deterioration of a spring for biasing the tip of the pin 18 toward the collar 17, the collar in operation It is possible to prevent the step 10 from dropping off due to the movement of 17.

  Further, in the abnormality detection device of the present embodiment, the cam 26 in contact with the operating piece 27a of the limit switch 27 has a groove portion 26a provided in a part of the outer peripheral portion of the circular cross section. After the operation piece 27a is once pushed outward in the radial direction of the detection shaft member 21 by the rotation of the cam 26, the operation piece 27a does not return to the groove portion 26a until the worker performs the return operation. The operating state of the limit switch 27 is maintained. Therefore, it is not necessary to use a limit switch 27 that is provided with a separate locking device for maintaining the operating state, and a limit switch that is simple in structure, resistant to failure, and inexpensive can be used.

  Moreover, since the abnormality detection apparatus of this embodiment uses the stud bolts 23 to 25 as detection pieces, the distance between the tip of each stud bolt and the step component can be easily adjusted.

  Moreover, since the abnormality detection device of the present embodiment is disposed in the space between the forward step 10 and the return step 10 in the truss 1, it can be easily disposed on an existing passenger conveyor. .

  As mentioned above, although the Example of this invention was described concretely using drawing, this invention is not limited to description of drawing and Example, Many deformation | transformation are possible. For example, in the drawings, the passenger conveyor has been described with an example of an escalator, but the passenger conveyor of the present invention is not limited to an escalator, and can also be applied to a moving sidewalk.

It is sectional drawing of the passenger conveyor of this invention. It is principal part explanatory drawing of the limit switch vicinity of the abnormality detection apparatus of this invention. It is explanatory drawing of the conventional safety device. It is explanatory drawing of the conventional safety device.

Explanation of symbols

1 truss 2 guide rail 3 step chain 10 step 13 step frame 14 front wheel roller 15 rear wheel roller 16 rotating shaft 17 collar (fixing member)
21 Detection shaft 23 Stud bolt (detection piece)
24 Stud bolt (detection piece)
25 Stud bolt (detection piece)
26 Cam 27 Limit switch

Claims (6)

A detection shaft member that is formed of a rod-like member extending in a direction perpendicular to the traveling direction of the step below the step on the forward path side in the truss, and is provided so as to be rotatable about the longitudinal direction as a rotation axis;
A plurality of detection pieces projecting on the outer peripheral surface of the detection shaft member, the tip portions of which are close to the step constituent members in the vicinity of the left and right step rollers provided at both end portions of the forward path side step;
A cam attached to the same shaft center to the detection shaft;
A step abnormality detecting device comprising: a limit switch that contacts an operating piece with the cam. The step abnormality detection device according to claim 1, wherein the plurality of detection pieces project toward a step component near the front wheel shaft and a step component near the rear wheel shaft of the step. The step abnormality detecting device according to claim 1 or 2, wherein the detection piece has a tip portion close to a step constituent member of the return side step. The step abnormality detecting device according to claim 1, wherein a front end portion of the detection piece is provided close to a fixing member that removably fixes a front wheel shaft of the step to a frame of the step. 2. The step abnormality detection according to claim 1, wherein the cam has a groove portion provided in a part of an outer peripheral portion of a circular cross section, and the operation piece of the limit switch is in contact with the groove portion in a steady state. apparatus. A step having step rollers at both ends,
An endless step chain connecting a plurality of the steps;
A guide rail provided along the direction of movement of the step chain, the step roller being mounted so as to be able to roll and guiding the movement of the step;
An apparatus for detecting an abnormality of the step, comprising a rod-like member extending below the step on the forward path side in a direction orthogonal to the traveling direction of the step, and provided rotatably about the longitudinal direction as a rotation axis. A plurality of detections in which the tip end is close to the step constituent members in the vicinity of the left and right step rollers provided on the both ends of the forward step on the outer side of the detection shaft. A passenger conveyor comprising: a step, a cam attached to the detection shaft member on the same axis, and a step abnormality detecting device having a limit switch in contact with the cam.

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