JP2011190067A - Step for preventing fall caused by fixing failure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily find that a step is incompletely fixed to a step shaft in the step for preventing fall caused by the fixing failure. <P>SOLUTION: A step 14 includes a fixed member 30 and a movable member 32 holding a step shaft 26, a fastening bolt 34 for fastening these members, and an advancing/retracting member 36 connected to the fastening bolt 34 and advanced/retracted to/from the outside of the step 14 based on the movement of the fastening bolt 34 in the axial direction. When a fore end 34a of the fastening bolt 34 is located at a hole in the fixed member 30, the advancing/retracting member 36 is moved toward the outside of the step 14, and a part of the advancing/retracting member 36 is projected from the step 14. It can be visually recognized, by the projection of the advancing/retracting member 36, that the step 14 and the step shaft 26 are not normally fastened to each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a step for an escalator, and more particularly, to an improvement in a structure that prevents dropping due to forgetting to fix the escalator.

  An escalator is a device that transports users. A configuration of a conventional escalator will be described with reference to FIG. FIG. 4 is a perspective view showing an entire conventional escalator.

  The escalator 110 is connected endlessly between a pair of entrances and exits 112 (only one is shown in FIG. 5) consisting of entrances and exits, and a drive rail (not shown) ) And the like, and an endless moving handrail 118 that slides along the outer periphery of the balustrade 116 in synchronization with the plurality of steps 114 that circulate. The escalator 110 puts a hand on the moving handrail 118 and moves a user on the step 114 that circulates from one entrance / exit 112 to the other entrance 112.

  Next, the configuration of the conventional step 114 will be described with reference to FIG. FIG. 6 is a side view of a conventional step 114.

  The step 114 includes a tread plate 120 on which a user rides and a riser surface 122 that is a raised portion of the step 114. The step 114 has a driving roller 124 that is a front wheel and a follower roller 125 that is a rear wheel. The drive roller 124 is rotatably supported by a step shaft 126 extending in the width direction of the step 114, and the step shaft 126 is connected to a step chain (not shown) that drives the step 114. A step shaft 126 is provided at each step 114. Then, by driving the step chain, the drive roller 124 and the follower roller 125 are respectively guided by a drive rail and a follower rail (both not shown) provided in the elevator 110, and the step 114 circulates.

  The step 114 has a clamp 128 to which the step shaft 126 is detachably attached. The clamp 128 is rotatably attached to a fixing member 130 in which a concave portion corresponding to a part of the outer peripheral surface of the step shaft 126 is formed, and a base end portion of the fixing member 130. A movable member 132 having a recess corresponding to a part thereof is formed inside, and a fastening bolt 134 for fastening the step shaft 126 sandwiched between the fixed member 130 and the movable member 132.

  In maintenance work or the like, the maintenance staff inserts a wrench into the wrench hole 120a formed in the tread 120 from above the tread 120, and rotates the fastening bolt 134 with the wrench, whereby the step 114 is attached to and detached from the step shaft 126. Is done.

  Patent Document 1 listed below describes a step device for a my conveyor having a shaft connected to a step chain, a shaft support portion of a step that supports the shaft, and a screw that fixes the shaft to the shaft support portion. . In this step device, a split pin is attached to the tip of the shaft protruding inward of the shaft support portion as a drop-off prevention tool for preventing the shaft supported by the shaft support portion from dropping outward. ing.

Japanese Patent Laid-Open No. 2003-137289

  In the conventional mounting operation of the step 114 on the step shaft 126, as shown in FIG. 6, the fastening bolt 134 is hidden under the tread 120, so that the fastening bolt 134 is securely fastened by a wrench. It cannot be confirmed visually. If the fastening bolt 134 is not securely fastened, the incompletely-fastened step 114 may be detached from the step shaft 126 when the step 114 is circulated and the escalator 110 may be damaged.

  An object of the present invention is to provide a drop prevention step that can easily find out that the step is not completely fixed to the step shaft and can prevent the step from dropping out.

  The present invention includes a step body that is detachably attached to a step shaft connected to a step chain of an escalator, and a recess that is fixed to the step body and that corresponds to a part of the outer peripheral surface of the step shaft. A fixed member, a movable member that is rotatably connected to the base end portion of the fixed member, and has a recess formed inside corresponding to a part of the outer peripheral surface of the step shaft, and a hole formed in the distal end portion of the fixed member A fastening bolt that is rotatably inserted into the nut and screwed into a nut provided at the tip of the movable member to fasten the step shaft sandwiched between the fixed member and the movable member, and is connected to the fastening bolt and fastened in the axial direction. An advancing and retreating member that can advance and retreat to the outside of the step based on the movement of the bolt, and the advancing and retreating part when the front end of the fastening bolt is positioned on the nut side of the movable member and the fastening bolt is screwed into the nut Is retracted inside of the step, when the tip of the fastening bolt is positioned in the hole of the fixing member, reciprocation member is moved toward the outside of the step, part of which, characterized in that projecting from the step.

  Further, the advancing / retreating member can be capable of advancing / retreating with respect to the riser surface of the step.

  Further, the escalator is provided with a step abnormal running detection device that detects the lifting of the step and stops the escalator. The step abnormal running detection device is configured such that when the advancing / retreating member protrudes from the riser surface, the advancing / retreating member is adjacent to the step. It is possible to stop the escalator by detecting that the step has been lifted by being caught on the tread.

  The advance / retreat member has a crank mechanism, and the crank mechanism can convert the movement of the fastening bolt into advance / retreat with respect to the riser surface.

  According to the step for preventing dropping due to forgetting fixing according to the present invention, it is possible to easily find out that the step is not completely fixed to the step shaft, and it is possible to prevent the step from dropping off.

It is a figure which shows the structure of the escalator which concerns on this embodiment. It is a perspective view which shows the structure of a step. It is a side view of the step seen from the A direction of FIG. It is a figure which shows the state in which fixation of the step with respect to a step axis | shaft is incomplete. It is a perspective view which shows the conventional escalator whole. It is a side view which shows the structure of the conventional step.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a step for preventing drop-out due to forgetting fixing (hereinafter simply referred to as “step”) according to the present invention will be described below with reference to the drawings. First, the configuration of an escalator provided with steps will be described with reference to FIG.

  The escalator 10 has a truss 11 that supports the weight and load of the escalator 10. As shown in FIG. 1, the truss 11 is stretched between the upper floor and the lower floor of the building. The truss 11 includes an upper floor side horizontal portion 11a connected to the upper floor on which one entrance 12 is provided, a lower floor side horizontal portion 11b connected to the lower floor on which the other entrance 12 is provided, and these And an inclined portion 11c provided between the horizontal portions 11a and 11b. Machine rooms are respectively provided in the upper floor side horizontal portion 11a and the lower floor side horizontal portion 11b.

  In addition, the truss 11 is provided with a plurality of steps 14 that can circulate between the upper floor side horizontal portion 11a and the lower floor side horizontal portion 11b. Furthermore, a balustrade 16 is erected on the truss 11 along the longitudinal direction of the truss 11. The balustrade 16 is provided with a handrail rail (not shown). A movable handrail 18 is stretched over the handrail rail so that it can run. The travel of the moving handrail 18 is guided by the handrail rail.

  In the machine room of the upper floor side horizontal portion 11a, a motor 40 as a drive source, a main drive sprocket 42, an upper sprocket 44, a main handrail drive sprocket 46, and a control device 48 are provided. On the other hand, a lower sprocket 50 is provided in the machine room of the lower floor side horizontal portion 11b. An output sprocket (not shown) is attached to the rotating shaft of the motor 40. The operation of the motor 40 is controlled by the control device 48.

  An endless main drive chain 52 is wound around the output sprocket of the motor 40 and the main drive sprocket 42. The main drive sprocket 42, the upper sprocket 44, and the main handrail drive sprocket 46 are all arranged on the same rotation shaft so as to be able to rotate synchronously. An endless step chain 54 that connects the steps 14 adjacent to each other in the traveling direction is wound around the upper sprocket 44 and the lower sprocket 50. With this configuration, the driving force of the motor 40 is transmitted to the step chain 54 via the drive chain 52 and the main drive sprocket 42, and the step 14 travels.

  A first handrail driving sprocket 56 and a handrail driving device 58 for driving the moving handrail 18 are provided in the vicinity of the upper floor side horizontal portion 11a of the inclined portion 11c. The first handrail drive sprocket 56 and the main handrail drive sprocket 46 are connected to each other via an endless first handrail drive chain 60. The handrail drive 58 and the first manual drive sprocket 56 are connected to each other via an endless second handrail drive chain 62. With this configuration, the driving force of the motor 40 is transmitted via the main drive chain 52, the main drive sprocket 42, the main handrail drive sprocket 46, the first handrail drive chain 60, the first handrail drive sprocket 56, and the second handrail drive chain 62. Then, it is transmitted to the handrail driving device 58, and the moving handrail 18 travels.

  Further, the escalator 10 includes a step abnormal traveling detection device (Curved Rail Safety Switch) 64 that is provided near the entrance 12 and detects the lift of the step 14 to stop the escalator 10. For example, when the step 14 is moving up and the step of the adjacent step 14 near the exit is reduced with the feet of the user riding on the step 14 being sandwiched between the side surfaces of the adjacent step 14, The step 14 adjacent to the front side of the step 14 on which it gets is caught by the user's foot and lifted upward to rise. The step abnormal running detection device 64 detects the raised step 14 and stops the escalator 10.

  In the escalator 10 configured as described above, the step 14 and the moving handrail 18 are circulated in synchronization with each other by the output of the motor 40 controlled by the control device 48. By this circulation traveling, a user who puts his hand on the moving handrail 18 and gets on the step 14 can be moved from one boarding / exiting port 12 to the other boarding / exiting port 12.

  Next, the configuration of the step 14 will be described with reference to FIG. The step 14 includes a step board 20 on which a user rides and a riser surface 22 that is a raised portion of the step 14.

  The steps 14 each have a pair of drive rollers 24 that are front wheels and a pair of follower rollers 25 that are rear wheels. The driving roller 24 is rotatably supported by a step shaft 26 extending in the width direction of the step 14, and the step shaft 26 is connected to the step chain 54. Then, by driving the step chain 54, the driving roller 24 and the follower roller 25 are respectively guided by a drive rail 66 and a follower rail 68 provided in the truss 11, and the step 14 circulates.

  Further, the step 14 has a clamp 28 that is a metal fitting to which the step shaft 26 is detachably attached. The clamp 28 includes a fixed member 30 that is fixed to the step body, a movable member 32 that is rotatably attached to the fixed member 30, and a fastening bolt 34 that fastens the fixed member 30 and the movable member 32.

  In the fixing member 30, a recess corresponding to a part of the outer peripheral surface of the step shaft 26 is formed inside. That is, the concave portion has an arc shape in cross section and is formed so as to be in contact with the outer peripheral surface of the step shaft 26. The fixed member 30 has, for example, a base end portion 30a that rotatably supports the movable member 32 via a pin, and a distal end portion 30b in which a hole into which the fastening bolt 34 is rotatably inserted is formed. In order to prevent the fastening bolt 34 from dropping, it is preferable that a female screw is formed on the inner peripheral surface of the hole of the distal end portion 30 b so as to be screwed into the fastening bolt 34.

  In the movable member 32, a recess corresponding to a part of the outer peripheral surface of the step shaft 26 is formed inside. That is, the concave portion has an arcuate cross section like the concave portion of the fixing member 30 and is formed so as to be in contact with the outer peripheral surface of the step shaft 26. The movable member 32 has a base end portion 32 a supported by the base end portion 30 a of the fixed member 30 and a tip end portion 32 b where a nut corresponding to the fastening bolt 34 is formed.

  In the clamp 28 configured as described above, a maintenance worker inserts a wrench (not shown) into the wrench hole 20a formed in the tread plate 20 from above the tread plate 20, and rotates the fastening bolt 34 with the wrench. Thus, the step 14 is attached to and detached from the step shaft 26.

  Specifically, when the step 14 is fixed to the step shaft 26, the maintenance staff rotates the fastening bolt 34 so as to remove it from the nut of the movable member 32 with a wrench, and fastens the fixed member 30 and the movable member 32. To remove the step 14 from the step shaft 26.

  On the other hand, when attaching the step 14 to the step shaft 26, the maintenance staff pinches the step shaft 26 between the fixed member 30 and the movable member 32, and rotates the fastening bolt 34 to be screwed into the nut of the movable member 32 with a wrench. Thus, the step shaft 26 is fastened and the step 14 is fixed to the step shaft 26.

  The step 14 of the present embodiment has a configuration that prevents the escalator 10 from dropping off due to forgetting to fix. That is, the step 14 includes an advance / retreat member 36 that is connected to the fastening bolt 34 and that can advance and retreat to the outside of the step 14 based on the movement of the fastening bolt 34 in the axial direction. When the front end 34a of the fastening bolt 34 is positioned on the nut side of the movable member 32 and the fastening bolt 34 is screwed into the nut, the advancing / retracting member 36 moves backward into the step 14 and the front end 34a of the fastening bolt 34 is fixed. When located in the hole of the member 30, it moves toward the outside of the step 14, and a part thereof is configured to protrude from the step 14.

  The case where the tip 34a of the fastening bolt 34 is located in the hole of the fixed member 30 means that the fastening bolt 34 is not screwed into the nut of the movable member 32, and the fixed member 30 and the movable member 32 are naturally fastened. It has not been. According to the step 14 of this embodiment, the maintenance staff can easily confirm this state visually by the protrusion of the advance / retreat member 36 from the step 14. The maintenance staff can determine that the step 14 and the step shaft 26 are not normally fastened by visual recognition of the protrusion.

  The advance / retreat member 36 is made of metal, for example. The advance / retreat member 36 is configured to be able to advance / retreat with respect to the riser surface 22. Specifically, the advance / retreat member 36 has a crank mechanism, and the crank mechanism converts the movement of the fastening bolt 34 into advance / retreat with respect to the riser surface 22.

  Specifically, the crank mechanism includes a first member 37 connected to the fastening bolt 34 and a second member 38 connected to the first member 37. The first member 37 includes a fixed point 37a that is rotatably supported by the step 14, and rotates around the fixed point 37a by the movement of the fastening bolt 34 in the axial direction. The second member 38 is rotatably connected to the first member 37 and is slidably supported on the step 14, and advances and retreats with respect to the riser surface 22 by the rotation of the first member 37.

  Next, a method for grasping the state in which the step 14 is improperly fixed to the step shaft 26 in the step 14 configured as described above will be described with reference to FIG.

  The maintenance staff attaches the step 14 to the step shaft 26 by installation work or maintenance work of the escalator 10. That is, the maintenance staff fits the step shaft 26 into the clamp 28. At this time, the step shaft 26 is sandwiched between the fixed member 30 and the movable member 32, and the fastening bolt 34 is not fastened as shown in FIG. However, since the maintenance staff cannot visually check the state of the fastening bolt 34 located at the lower part of the tread plate 20, it is determined whether or not the fixing of the step shaft 26 and the step 14 is complete based on the fastening bolt 34. I can't.

  In the present embodiment, when the fastening bolt 34 is not fastened as described above, the leading end 34 a of the fastening bolt 34 is located in the hole of the fixing member 30, so that the advance / retreat member 36 moves away from the riser surface 22. It protrudes. Based on this protrusion, the maintenance staff can grasp that the fixing of the step shaft 26 and the step 14 is incomplete.

  Even if the maintenance staff misses the protrusion of the advancing / retreating member 36 and operates the escalator 10, the protrusion 14 is caught by the step board 20 of the adjacent step 14 near the entrance 12 and the step 14 is lifted. By detecting the lift by the step abnormal running detection device 64, it is possible to grasp that the step 14 and the step shaft 26 are not securely fastened. Further, since the escalator 10 is automatically stopped by the detection of the step abnormal traveling detection device 64, the escalator 10 is prevented from being damaged due to the step 14 dropping off from the step shaft 26.

  In this embodiment, although the case where the advance / retreat member 36 can advance / retreat with respect to the riser surface 22 has been described, it is not limited to this configuration. The maintenance member may be configured so that the advance / retreat member 36 moves forward / backward with respect to the tread plate 20 as long as the maintenance staff can visually check the protrusion of the advance / retreat member 36.

  In the present embodiment, the case where the advance / retreat member 36 is a crank mechanism has been described. However, the present invention is not limited to this configuration. A known mechanical structure, for example, a structure using an elastic member, can be applied as long as the structure can advance and retreat to the outside of the step 14 based on the movement of the fastening bolt 34 in the axial direction.

  10,110 Escalator, 14,114 Step, 16,116 Parapet, 18,118 Moving handrail, 20,120 Footboard, 22,122 Riser surface, 26,126 Step shaft, 28,128 Clamp, 30,130 Fixing member, 32 , 132 movable member, 34, 134 fastening bolt, 36 advance / retreat member, 54 step chain, 64 step abnormal running detection device.

Claims (4)

A step body detachably attached to a step shaft connected to the escalator step chain;
A fixing member fixed to the main body of the step and having a recess formed inside corresponding to a part of the outer peripheral surface of the step shaft;
A movable member that is rotatably connected to a base end portion of the fixed member, and a concave portion corresponding to a part of the outer peripheral surface of the step shaft is formed inside;
A fastening bolt that is rotatably inserted into a hole formed in the distal end portion of the fixed member, and fastens the step shaft sandwiched between the fixed member and the movable member by screwing into a nut provided in the distal end portion of the movable member;
An advancing and retracting member connected to the fastening bolt and capable of advancing and retracting to the outside of the step based on the movement of the fastening bolt in the axial direction;
Have
When the front end of the fastening bolt is located on the nut side of the movable member and the fastening bolt is screwed into the nut, the advance / retreat member moves backward into the step, and when the front end of the fastening bolt is located in the hole of the fixed member, The member moves toward the outside of the step, part of which protrudes from the step,
A step for preventing falling off due to forgetting to fix. In the step for preventing falling off due to forgetting to fix according to claim 1,
The advance / retreat member can advance and retreat with respect to the riser surface of the step,
A step for preventing falling off due to forgetting to fix. In the step for preventing falling off due to forgetting to fix according to claim 2,
The escalator is provided with a step abnormal running detection device that detects the lifting of the step and stops the escalator,
When the advancing / retreating member protrudes from the riser surface, the step abnormal running detection device detects that the advancing / retreating member is caught on the stepping plate of the adjacent step and the step is lifted, and stops the escalator.
A step for preventing falling off due to forgetting to fix. In the step for preventing dropout due to forgetting to fix according to any one of claims 1 to 3,
The advance / retreat member has a crank mechanism,
The crank mechanism converts the movement of the fastening bolt into advance and retreat with respect to the riser surface.
A step for preventing falling off due to forgetting to fix.

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