JP2011121658A - Abnormality detection device of step for passenger conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormality detection device of a step for a passenger conveyor, detecting an abnormality only when the step has the abnormality. <P>SOLUTION: The abnormality detecting device 4 includes: a detection shaft 21 provided below the step 10 on the forward passage side in a truss of an escalator, and provided in a direction perpendicular to the advancing direction of the step 10; a detection rod 25 protrudingly provided vertically on an outer circumferential surface of the detection shaft 21, and located close to step rollers 13, 15; a cam 26 provided coaxially with the detection shaft 21; and a limit switch 27 with which an operating piece of the cam 26 comes in contact. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an anomaly detection device that can detect an anomaly that a step of a passenger conveyor such as a moving sidewalk or an escalator sinks due to breakage or dropping of a step roller.

  The escalator includes a plurality of steps having step rollers at both end portions. 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 direction of movement 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 roller and other reasons, the step roller may be damaged during operation of the escalator. 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 to stop the operation of the escalator.

  As an apparatus for detecting such a step abnormality, for example, an abnormality detection apparatus disclosed in Patent Document 1 has been proposed.

  As shown in FIG. 10, this abnormality detection device is provided with a detection shaft 121 below the forward step in the truss, and the tip of the detection shaft 121 is close to the step 100 near the left and right step rollers on the outer peripheral surface of the detection shaft 121. A plurality of detection rods 125 project, and a cam 129 is attached to the detection shaft 121, and a limit switch 127 is provided on the cam 129.

  When an abnormality occurs in the step roller, the step 100 comes into contact with the detection rod 125, whereby the cam 129 rotates and the limit switch 127 operates.

JP 2007-76823 A

  In the abnormality detection device shown in Patent Document 1, a detection rod 125 for detecting an abnormality is provided at a right angle to the inclination of the escalator. Therefore, the detection rod 125 is in a state of being easily rotated, and is self-supporting due to the pressing force against the cam 129 by the limit switch 127. For this reason, there is a problem that the limit switch 127 operates even though there is no abnormality due to vibration at the time of starting the escalator.

  Therefore, in view of the above problems, the present invention provides a passenger conveyor step abnormality detecting device capable of detecting an abnormality only when the step has an abnormality.

  The present invention relates to a detection shaft provided below a step on the forward path side in a truss of a passenger conveyor and rotatable in a direction perpendicular to the traveling direction of the step, and vertically on an outer peripheral surface of the detection shaft. And a detection rod whose tip is close to a step constituting member of a pair of left and right step rollers provided at both end portions of the step on the forward path side, the same axis as the detection shaft, and the detection An abnormality detection device for a passenger conveyor step, comprising: a cam attached to a shaft; and a limit switch in contact with an operating piece of the cam.

  According to the present invention, since the detection rod protrudes vertically, the force with which the detection rod tries to rotate is reduced, and unnecessary operations can be prevented.

It is a general view of the escalator which concerns on Example 1 of this invention. It is the sectional view on the AA line in FIG. FIG. 3 is an enlarged view of a range B in FIG. 2. It is an enlarged view of the range C in FIG. It is an enlarged view near the front-end | tip part of the stud bolt at the time of abnormality. It is an enlarged view of the abnormality detection apparatus in Example 2. It is an enlarged view of a stud bolt with a sharp tip in Example 3. FIG. 6 is an enlarged view of a stud bolt having a hemispherical tip in Example 3. FIG. 6 is an enlarged view of an abnormality detection apparatus according to a fourth embodiment. It is an enlarged view of the conventional abnormality detection apparatus.

  Hereinafter, an abnormality detection device 4 for a step 10 in an escalator 1 that is one of passenger conveyors according to an embodiment of the present invention will be described with reference to the drawings.

  An abnormality detection device 4 for a step 10 in an escalator 1 according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is an overall view of the escalator 1 according to the present embodiment, and FIG. 2 is a cross-sectional view taken along line AA in FIG. It is. 3 is an enlarged view of the range B in FIG. 2, and FIG. 4 is an enlarged view of the range C in FIG.

(1) Structure of the step 10 of the escalator 1 The structure of the step 10 of the escalator 1 will be described.

  As shown in FIGS. 1 and 2, a pair of left and right guide rails 2 and 3 are attached and fixed in the truss 5 of the escalator 1, and guided to the pair of left and right guide rails 2 and 2 and the pair of left and right guide rails 3 and 3. Steps 10 on the forward side and the return side are provided.

  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 a pair of left and right front wheel rollers 14 and a pair of left and right rear wheel rollers 15 with the step frame 13 in the center, and the pair of left and right front wheel rollers 14 are a pair of left and right guide rails 2 and 2. The pair of left and right rear wheel rollers 15 rolls on the pair of left and right guide rails 3 and 3 so that the step 10 moves in the truss 5.

  The pair of left and right front wheel rollers 14 are attached to both ends of the rotating shaft 16. The rotating shaft 16 is detachably fixed to the step frame 13 via a collar 17 that is a cylindrical fixing member that is slidably attached to the outer peripheral surface in the axial direction. A pin (not shown) that locks 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. The same applies to the return-side step 10 located below the forward-side step 10. A step chain (not shown) is provided in the vicinity of the side surfaces of the pair of left and right front wheel rollers 14. The rotating shaft 16 of the front wheel roller 14 passes through the step chain, and the step 10 moves on the pair of left and right guide rails 2 and 2 as the step chain circulates.

  The pair of left and right rear wheel rollers 15 are attached to individual rotating shafts 31, and the rotating shafts are attached and fixed to the rear side of the step frame 13. A pair of left and right rear wheel rollers 15 roll on the pair of left and right guide rails 3 and 3.

(2) Structure of Abnormality Detection Device 4 An abnormality detection device 4 is provided to detect an abnormality such as the sinking or dropping of the step 10. The abnormality detection device 4 will be described. The abnormality detection device 4 includes a detection shaft 21, stud bolts 23 and 25 that are detection rods, a cam 26, and a limit switch 27.

  The detection shaft 21 is disposed below the step 10 on the forward path side in the truss 5 and has a rod shape having a rotation axis in a direction orthogonal to the traveling direction of the step 10. The length of the detection shaft 21 is longer than the distance between the pair of left and right front wheel rollers 14 in the illustrated example, and both end portions of the detection shaft 21 are rotatably supported by support members 22 connected and fixed to the truss 5, The detection shaft 21 is rotatable in a direction parallel to the traveling direction of the step 10. As a means for the support member 22 to rotatably support the detection shaft 21, for example, a hole in which the detection shaft 21 is fitted in the support member 22 is provided, and the detection shaft 21 is attached and slid into the hole. Alternatively, the support member 22 may be provided with a bearing that supports the detection shaft 21.

  The pair of left and right stud bolts 23, 23 are vertically projected on the outer peripheral surface of the detection shaft 21 toward the step 10. The pair of left and right stud bolts 23, 23 are for detecting that the rear wheel roller 15 on the forward path side is damaged or dropped and the step 10 sinks, and the rear wheel roller 15 on the forward path side step 10. The amount of protrusion from the detection shaft 21 is fixed to the step frame 13 that fixes the rotation shaft 31 with a nut so that the tip ends of the stud bolts 23 and 23 are close to each other.

  The pair of left and right stud bolts 25, 25 are vertically projected on the outer peripheral surface of the detection shaft 21 toward the step 10. The pair of left and right stud bolts 25, 25 are for detecting that the front wheel roller 14 on the forward path side is broken or sinks due to dropping off, etc., and on the rotating shaft 16 connecting the pair of left and right front wheel rollers 14, 14, The amount of protrusion from the detection shaft 21 is fixed with a nut so that the tip ends of the stud bolts 25 and 25 are close to each other. The pair of left and right stud bolts 25, 25 shown in the figure are provided close to the collar 17 of the rotating shaft 16, and if for some reason the collar 17 moves toward the center in the axial direction during operation, the stud bolt 25, The collar 17 is in contact with the tip of 25.

  On the opposite side of the stud bolt 23, that is, downward from the detection shaft 21, a balancing stud bolt 123 protrudes vertically. The balance stud bolt 123 is shorter than the stud bolt 23. Further, a balancing stud bolt 125 projects from the opposite side of the stud bolt 25, that is, downward from the detection shaft 21. The balance stud bolt 125 is shorter than the stud bolt 25.

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

  FIG. 4 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. In FIG. 4, a stud bolt 25 protruding from the outer peripheral portion of the detection shaft 21 is shown. The front end portion 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 rotation shaft 16 is attached to the step frame 13 via a collar 17, and the collar 17 is locked to move in the axial direction by a pin (not shown). The stud bolt 25 is disposed so that the outer periphery of the collar 17 comes into contact with the tip of the stud bolt 25 when the locking by the pin is released due to some abnormality and the collar 17 moves in the axial direction.

  The cam 26 is provided at one end of the outer peripheral portion of the detection shaft 21. The cam 26 has a substantially circular cross section that is the same axis as the detection shaft 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 of the detection shaft 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. When the detection shaft 21 rotates about the shaft center, 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 moves in the radial direction of the detection shaft 21. The limit switch 27 is actuated by being pushed outward. Since only one groove portion 26a is provided for the cam 26, the operating piece 27a returns to the groove portion 26a after the operating piece 27a is once pushed radially outward of the detection shaft 21 by the rotation of the cam 26. In other words, the operating state of the limit switch 27 is maintained until the worker performs a return operation.

(3) Steady state Next, the abnormality detection device 4 in a steady state where no abnormality of the step 10 has occurred will be described.

  As shown in FIG. 4, the abnormality detecting device 4 is configured such that the operating piece 27 a of the limit switch 27 that detects abnormality contacts the groove 26 a of the cam 26 fixed to the detection shaft 21 in the normal state. Not working.

(4) Abnormality Next, the abnormality detection device 4 when the step 10 is abnormal will be described.

  First, when the rear wheel roller 15 on the forward path side is damaged or dropped, the step frame 13 to which the rotating shaft 31 of the rear wheel roller 15 is attached sinks, so that the step frame 13 contacts the tip of the stud bolt 23. The detection shaft 21 on which the stud bolt 23 is protruded rotates. Along with the rotation of the detection shaft 21, the cam 26 fixed to the end of the detection shaft 21 also rotates, and the operating piece 27 a of the limit switch 27 that is in contact with the groove portion 26 a of the cam 26 is disengaged from the groove portion 26 a. The limit switch 27 is actuated by being pushed radially outward. 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 connecting the steps 10. Stop operation.

  Next, when the front wheel roller 14 on the forward path is damaged or dropped, the rotating shaft 16 to which the front wheel roller 14 is attached sinks, so that the rotating shaft 16 is at the tip of the stud bolt 25 as shown in FIG. Contact with. Accordingly, the detection shaft 21 on which the stud bolt 25 is protruded rotates as in the case where the rear wheel roller 15 is damaged or dropped. 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 portion 26a of the cam 26 comes off from the groove portion 26a. The limit switch 27 is actuated by being pushed radially outward.

(5) Effect According to the abnormality detection device 4 of the present embodiment, since the stud bolts 23 and 25 are vertically projected, the stud bolts 23 and 25 do not rotate by themselves and the escalator is activated. The limit switch 27 does not operate due to rotation of the cam 26 due to vibrations or the like.

  According to the abnormality detection device 4 of the present embodiment, when any one of the pair of left and right outbound road side rear wheel rollers 15 and 15 and the pair of left and right outbound path side front wheel rollers 14 and 14 is broken or dropped, Since the limit switch 27 is operated by the rotation of the detection shaft 21 on which the stud bolts 23 and 23 and the pair of left and right stud bolts 25 and 25 are projected, it is sufficient to provide one limit switch 27, and the minimum number of limit switches 27 is sufficient. The limit switch 27 can detect any breakage or dropout of the pair of left and right forward wheels 15 and 15 and the pair of left and right front wheels 14 and 14 described above.

  In addition, since the abnormality detection device 4 of the present embodiment uses the stud bolts 23 and 25 as the detection rods, the distance between the tip portions of the respective stud bolts 23 and 25 and the constituent members of the step 10 can be easily adjusted. Can do.

  Further, since the abnormality detection device 4 of the present embodiment is disposed in the space between the forward step 10 and the return step 10 in the truss 5, it can be easily disposed on the existing escalator 1. is there.

  Next, the abnormality detection device 4 according to the second embodiment of the present invention will be described with reference to FIG.

  The difference between the present embodiment and the first embodiment is that a balance bolt 123 having the same length is provided from the detection shaft 21 symmetrically with the stud bolt 23 in the vertical direction.

  That is, in the first embodiment, the balancing stud bolt 123 that is considerably shorter than the stud bolt 23 is provided.

  However, in this embodiment, in order to further improve this balance, a balancing stud bolt 123 having the same length as that of the stud bolt 23 is protruded vertically downward from the outer peripheral surface of the detection shaft 21.

  Although not shown, the stud bolt 25 is similarly provided with a balancing stud bolt having the same length as the stud bolt 25.

  Next, the abnormality detection device 4 according to Embodiment 3 of the present invention will be described with reference to FIG.

  In the first embodiment, the front end portions of the stud bolts 23 and 25 are formed by surfaces cut at right angles to the axial direction. Therefore, the contact when the step 10 contacts the tip of the stud bolts 23 and 25 while moving upward is different from the contact when the step 10 contacts while moving downward, and the operating load depends on the operating direction of the escalator 1. The operating speed will be different.

  Therefore, in this embodiment, as shown in FIG. 7, a surface is formed by cutting the tip of the stud bolt at an acute angle with respect to the axial direction. As a result, both the case where the escalator 1 moves upward and the case where the escalator 1 moves downward are the same in how the tips of the stud bolts 23 and 25 are brought into contact with the step 10, and the operation load and the operation speed depending on the operation direction. Instability can be improved.

  Further, as shown in FIG. 8, even if the tip ends of the stud bolts 23 and 25 are made hemispherical, it is possible to improve the instability of the operation load and the operation speed due to the operation direction as described above.

  Next, the abnormality detection device 4 according to Embodiment 4 of the present invention will be described with reference to FIG.

  In the first embodiment, balancing stud bolts 123 and 125 are provided.

  On the other hand, in this embodiment, as shown in FIG. 9, the weight balance is further improved by attaching a weight 30 to the lower portion of the balancing stud bolt 125. The balance stud bolt 123 is similarly attached with a weight.

Example of change

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof.

  In the above embodiment, the stud bolt 23 is provided to detect an abnormality of the rear wheel roller on the forward path side, and the stud bolt 25 is provided to detect an abnormality of the front wheel roller 14 on the road side. In addition to this, a stud bolt for detecting the lift of the rear wheel roller 15 on the return path side may be provided. In this case, stud bolts are vertically projected downward from the detection shaft 21, and the tip ends of the left and right stud bolts are attached to the step frame 13 that fixes the rotating shaft 31 of the rear wheel roller 15 of the step 10 on the return path side. What is necessary is just to make a part adjoin. In this case, the stud bolt also serves as a weight for the outward stud bolt 23.

  In each said Example, although the passenger conveyor was demonstrated with the example of the escalator, the passenger conveyor of this invention is not restricted to an escalator, It can also apply to the moving walkway.

DESCRIPTION OF SYMBOLS 1 Escalator 2 Guide rail 3 Guide rail 4 Abnormality detection apparatus 5 Truss 10 Step 13 Step frame 14 Front wheel roller 15 Rear wheel roller 16 Rotating shaft 21 Detection shaft 23 Stud bolt (detection rod)
25 Stud bolt (detection rod)
26 Cam 27 Limit switch

Claims (5)

A detection shaft provided below the step on the forward path in the truss of the passenger conveyor and rotatable in a direction perpendicular to the traveling direction of the step;
A detection rod that protrudes vertically on the outer peripheral surface of the detection shaft and has a tip portion close to a step constituting member of a pair of left and right step rollers provided at both side ends of the forward step;
A cam that is coaxial with the detection shaft and attached to the detection shaft;
A limit switch with which the operating piece of the cam contacts,
An abnormality detection device for passenger conveyor steps, comprising: The detection rod is vertically symmetrical about the detection axis, and protrudes from the detection axis with the same length.
The abnormality detection device for a passenger conveyor step according to claim 1. The tip of the detection rod is formed by a surface cut at an acute angle with respect to the axial direction of the detection rod,
The abnormality detection device for a passenger conveyor step according to claim 1. The tip of the detection rod is formed in a hemispherical shape,
The abnormality detection device for a passenger conveyor step according to claim 1. A weight is attached to the detection shaft that is vertically symmetrical with the detection rod,
The abnormality detection device for a passenger conveyor step according to claim 1.

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