JP4663458B2 - Pressure roller attaching / detaching apparatus and method for moving handrail for man conveyor - Google Patents

Description

  The present invention relates to a pressure roller attaching / detaching device and a method thereof in a handrail driving device for a moving handrail for a man conveyor such as an escalator.

Most of the conventional handrail driving devices that drive the moving handrails for man conveyors use a push-pull method in which the moving handrails are pressed against the driving rollers synchronized with the movement of the man conveyor with a pressure roller. Yes. This structure will be described with reference to FIG. 1, FIG. 8, and FIG. A man conveyor such as an escalator includes a truss 1 of a man conveyor extending between beams on upper and lower floors to form an inclined portion, and a step 2 that circulates along a drive rail (not shown) provided on the truss 1 The moving handrail 3 is provided along substantially the entire length of the step 2 and circulates in synchronization with the step 2. A drive sprocket 4 that drives the steps 2 and the moving handrail 3 is provided in the upper machine room of the truss 1. The driving sprocket 4 transmits the driving force of the driving machine 6 to the step 2 and the moving handrail 3. A handrail driving device 10 that drives the moving handrail 3 is installed near the upper end of the truss 1 of the man conveyor. A driving force transmission chain 5 is wound between the handrail driving device 10 and the driving sprocket 4, and the driving force is transmitted to the handrail driving device 10 by the driving force transmission chain 5. The handrail drive device 10 includes a plurality of drive rollers 11 composed of four or six arranged in tandem along the moving handrail 3. Each of the plurality of driving rollers 11 has a substantially short cylindrical shape, and is rotatably supported by shafts penetrating the central hole. The drive roller 11 is disposed such that the outer peripheral surface is in contact with the moving handrail 3. In addition, a plurality of four or six pressure rollers 12 are disposed at positions facing the driving roller 11 with the moving handrail 3 interposed therebetween. The plurality of pressure rollers 12 are arranged side by side so as to form a pair with the driving roller 11. The power from the driving sprocket 4 that drives the steps 2 and the moving handrail 3 is transmitted from the driving force transmission chain 5 to the driving force transmission sprocket 13 provided in the handrail driving device 10. A chain tension adjusting sprocket 14 is provided in the middle of the plurality of driving rollers 11 and closer to the middle of the plurality of pressure rollers 12 with the moving handrail 3 interposed therebetween. A handrail driving chain 15 for transmitting a driving force to the moving handrail 3 is wound around the driving force transmission sprocket 13, the plurality of driving rollers 11, and the chain tension adjusting sprocket 14.
A leaf spring 16 is provided between the pair of left and right pressure rollers 12 to press the pressure roller 12 toward the drive roller 11 with the moving handrail 3 interposed therebetween. Reference numeral 17 denotes a pressure roller fixing plate integrated with the bolt, and is provided on the moving handrail 3 side of the leaf spring 16. Reference numeral 18 denotes a leaf spring retainer provided on the counter-moving handrail side of the leaf spring 16, and 19 denotes a fixing nut provided integrally with or separately from the leaf spring retainer 18. 20 is screwed.

  In the replacement operation of the pressure roller 12, the amount of bending of the leaf spring 16 is large, and when the fixing nut 19 is loosened, the spring force is continuously applied to the fixing nut 19 for the amount of bending of the leaf spring 16. For this reason, it is impossible to turn the fixing nut 19 by hand, and it is necessary to loosen the fixing nut 19 while rotating it with a spanner 20 or the like, which is a time-consuming operation.

  Further, as a prior art, a driving force is transmitted from a driving means to rotate, and a driving roller that drives a moving handrail by a frictional resistance that acts between the outer peripheral surface and the moving handrail, and a driving roller that sandwiches the moving handrail. A pressure roller that is rotatably provided at an opposite position, and a pressure roller that is provided on the pressure roller, urges the pressure roller toward the driving roller, and sandwiches a moving handrail between the pressure roller and the driving roller. Handrail drive comprising a pressure spring for generating force, a slip amount detecting means for detecting the slip amount of the moving handrail with respect to the drive roller, and a clamping force adjusting means for adjusting the clamping force based on the output of the slip amount detecting means An apparatus has been proposed (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2004-217401

In the conventional handrail drive device of a man conveyor, the replacement work of the pressure roller that presses the moving handrail requires a large amount of bending of the leaf spring, and when loosening the fixing nut, the amount of bending of the leaf spring is extended for a long time. The spring force continues to be applied. For this reason, it is impossible to turn the fixing nut by hand, and it is necessary to loosen it while turning the fixing nut with a spanner or the like.
Further, the handrail drive device described in the prior art is intended to always set the clamping force acting on the drive roller and the pressure roller to an optimum force, and improves the workability of replacing the pressure roller. It was not taken into account.

  The present invention has been made to solve the above-described problems, and restrains the leaf spring of the pressure roller with a restraining jig in a normal mounting state where the pressure roller presses the moving handrail. Thus, the present invention provides a pressure roller attaching / detaching device and method for a moving handrail for a man conveyor, in which if the fixing nut of the pressure roller is loosened with a spanner or the like, the fixing nut can be turned by hand.

A pressure roller attaching / detaching device for a moving handrail for a man conveyor according to the present invention includes a driving roller that drives a moving handrail that circulates in synchronization with a step, and an additional roller that is disposed at a position facing the driving roller across the moving handrail. A plate spring provided between the pressure roller and the pressure roller, which is always pressed against the driving roller, and a moving handrail side of the plate spring, and the bolt portion of the integral structure is the anti-moving handrail of the plate spring. The pressure roller fixing plate extending to the side, the leaf spring presser provided on the anti-moving handrail side of the leaf spring, and the pressure roller fixing plate is screwed into the bolt portion of the pressure roller fixing plate in the normal mounting state A fixing nut that is detachably attached to the pressure roller in a normal mounting state of the pressure roller, and restrains the leaf spring from being in a free state . Base and this base A fixed claw that is provided at the end and engages the shaft of one pressure roller, and a movable claw that is movably provided at the other end of the base and engages the shaft of the other pressure roller Are provided .

  The restraining jig includes a base having a relief hole through which the bolt portion of the pressure roller fixing plate passes, and an engagement provided at one end portion of the base and engaging with a shaft portion of one pressure roller. A pair of front and rear movable claw portions having a fixed claw portion having a portion, a front and back movable claw portion that is movably provided on the front and rear of the other end portion of the base, and that engages with the shaft portion of the other pressure roller. And a connecting rod provided between the movable claw portions.

  Further, the length to the tip of the movable claw portion is selected to be a length that overlaps the shaft portion of the pressure roller even when the leaf spring is in a free state.

  In addition, a rounded portion is provided on the upper portion of the engaging portion with which the shaft portion of the pressure roller of the movable claw portion is engaged.

  The restraining jig includes a base and movable claw portions that are movably provided at both ends of the base and engage with the shaft portion of the pressure roller.

  In addition, the restraining jig is provided movably on the base having a relief hole through which the bolt portion of the pressure roller fixing plate passes and on both ends of the base, and is engaged with the shaft portion of the pressure roller. A pair of front and rear movable claw portions having mating engagement portions and a connecting rod provided between the pair of front and rear movable claw portions are provided.

  The method of attaching and detaching the pressure roller of the moving handrail for a man conveyor according to the present invention includes a step of temporarily attaching one end portion of a restraining jig to the shaft portion of one pressure roller during the replacement operation of the pressure roller, Temporarily attaching the other end of the restraining jig to the shaft portion of the pressure roller, and then moving the other end of the restraining jig so that both ends of the restraining jig are As the main mounting state between the shafts, a step of restraining the leaf spring from being free, a step of rotating the fixing nut with a spanner or the like while the leaf spring is restrained, and a step of loosening the fixing nut by hand And a step of rotating the.

  The restraining jig is provided at a base, one end of the base, a fixed claw that engages with the shaft of one pressure roller, and movably provided at the other end of the base. With a movable claw portion that engages with the shaft portion of the pressure roller, when the pressure roller is replaced, the shaft portion of one pressure roller is engaged with the fixed claw portion at one end of the restraining jig. Temporarily attaching the movable claw portion of the other end portion of the restraining jig on the shaft portion of the other pressure roller, and temporarily attaching the movable claw portion of the other end portion of the restraining jig. By moving the movable claw portion, the fixed claw portion and the movable claw portion at both ends of the restraining jig are engaged with each other between the shaft portions of both pressure rollers, and the leaf spring becomes free. And a step of loosening the fixing nut with a spanner while the leaf spring is restrained Is then that a step of rotating the fixing nut by hand.

  According to the present invention, by restraining the leaf spring of the pressure roller with a restraining jig, if the fixing nut of the pressure roller is loosened by about one turn with a spanner or the like, then the fixing nut can be manually rotated. The pressure roller can be easily removed. Thereby, the replacement work time of the pressure roller can be greatly shortened.

Embodiment 1 FIG.
1 is a schematic side view showing a man conveyor provided with a handrail driving device to which a pressure roller attaching / detaching device for a moving handrail for man conveyor according to Embodiment 1 of the present invention is applied, and FIG. 2 is Embodiment 1 of the present invention. FIG. 3 is a perspective view showing a restraining jig used as a pressure roller attaching / detaching device for a moving handrail for a man conveyor in FIG. 3, and FIG. 3 shows a restraining treatment used as a pressure roller attaching / detaching device for a moving handrail for man conveyor in Embodiment 1 of the present invention. FIG. 4 is an enlarged perspective view showing a method of attaching the tool to the pressure roller, and FIG. 4 is a side view showing a method of using a restraining jig used as a pressure roller attaching / detaching device for a moving handrail for a man conveyor in Embodiment 1 of the present invention. FIG. 5 shows a method of removing the pressure roller by a restraining jig used as the pressure roller attaching / detaching device for the moving handrail for the man conveyor in the first embodiment of the present invention. Rear view, FIG. 6 is a perspective view showing a method of removing the constraining jig is used as the pressure roller detaching device of the moving handrail for passenger conveyor in Embodiment 1 of the present invention from the pressure roller.

  In the figure, a man conveyor such as an escalator circulates and moves along a truss 1 of a man conveyor extending between beams on upper and lower floors to form an inclined portion and a drive rail (not shown) provided on the truss 1. A step 2 and a moving handrail 3 that is provided along substantially the entire length of the step 2 and circulates in synchronization with the step 2 are provided. A drive sprocket 4 that drives the steps 2 and the moving handrail 3 is provided in the upper machine room of the truss 1. The driving sprocket 4 transmits the driving force of the driving machine 6 to the step 2 and the moving handrail 3. A handrail driving device 10 that drives the moving handrail 3 is installed near the upper end of the truss 1 of the man conveyor. A driving force transmission chain 5 is wound between the handrail driving device 10 and the driving sprocket 4, and the driving force is transmitted to the handrail driving device 10 by the driving force transmission chain 5. The handrail drive device 10 includes a plurality of drive rollers 11 composed of four or six arranged in tandem along the moving handrail 3. Each of the plurality of driving rollers 11 has a substantially short cylindrical shape, and is rotatably supported by shafts penetrating the central hole. The drive roller 11 is disposed such that the outer peripheral surface is in contact with the moving handrail 3. In addition, a plurality of four or six pressure rollers 12 are disposed at positions facing the driving roller 11 with the moving handrail 3 interposed therebetween. The plurality of pressure rollers 12 are arranged side by side so as to form a pair with the driving roller 11. The power from the driving sprocket 4 that drives the steps 2 and the moving handrail 3 is transmitted from the driving force transmission chain 5 to the driving force transmission sprocket 13 provided in the handrail driving device 10. A chain tension adjusting sprocket 14 is provided in the middle of the plurality of driving rollers 11 and closer to the middle of the plurality of pressure rollers 12 with the moving handrail 3 interposed therebetween. A handrail driving chain 15 for transmitting a driving force to the moving handrail 3 is wound around the driving force transmission sprocket 13, the plurality of driving rollers 11, and the chain tension adjusting sprocket 14. A leaf spring 16 is provided between the pair of left and right pressure rollers 12 to press the pressure roller 12 toward the drive roller 11 with the moving handrail 3 interposed therebetween. Reference numeral 17 denotes a pressure roller fixing plate integrated with the bolt, and is provided on the moving handrail 3 side of the leaf spring 16. Reference numeral 18 denotes a leaf spring holder provided on the side of the leaf spring 16 opposite to the moving handrail, 19 denotes a fixing nut provided integrally with or separately from the leaf spring holder 18, and a wrench or the like is provided on the bolt portion of the pressure roller fixing plate 17. 20 is screwed.

  A restraining jig 21 used as a pressure roller attaching / detaching device for a moving handrail for a man conveyor which is a feature of the present invention is capable of restraining the leaf spring 16 of the pressure roller 12 in a normal mounting state of the pressure roller 12. Yes, it is structured as follows. The restraining jig 21 is erected on a sheet metal base 22 having a relief hole 22a through which a bolt portion of the pressure roller fixing plate 17 penetrates in the center, and front and rear portions of one end of the base 22. The pair of front and rear fixed claw portions 23 having an engagement portion 23a that is hooked and engaged with the shaft portion 12a of one pressure roller 12 from the outside, and the base 22 so as to face the fixed claw portion 23. A pair of front and rear movable claw portions 24 each having an engaging portion 24a that is provided upright on the front and rear portions of the other end portion and is inserted and engaged with the shaft portion 12a of the other pressure roller 12 from below. The connecting rod 25 is provided between the movable claw parts 24 and the fine screw 26 for fine position adjustment provided at the front and rear portions of the center part of the base 22. Note that rounded portions 23 b and 24 b are provided at upper end portions into which the shaft portion 12 a of the pressure roller 12 of the engaging portion 23 a of the fixed claw portion 23 and the engaging portion 24 a of the movable claw portion 24 are fitted. In particular, the rounded portion 24 b of the engaging portion 24 a of the movable claw portion 24 serves as a guide when the restraining jig 21 is attached to the pressure roller 12.

A procedure for replacing the pressure roller by the pressure roller attaching / detaching device for the moving handrail for the man conveyor according to the first embodiment of the present invention will be described.
First, in the normal mounting state of the pressure roller 12, the restraining jig 21 is moved from the position directly below the pressure roller 12 to the engaging portion 23a of the fixing claw 23 of the restraining jig 21, as shown in FIG. The pressure roller 12 is engaged with the shaft portion 12a. Thereafter, as shown in FIG. 3, the movable claw portion 24 of the restraining jig 21 is rotated upward and outward, and the tip end portion of the movable claw portion 24 is placed on the shaft portion 12 a of the other pressure roller 12. To do. In this state, the bolt portion of the pressure roller fixing plate 17 passes through the relief hole 22a in the center of the base 22, and the leaf spring 16 is in a free state. Here, the length to the tip of the movable claw 24 is a length that overlaps the shaft portion 12a of the pressure roller 12 even when the pressure roller assembly is removed, that is, the leaf spring 16 is in a free state. The restraining jig 21 can be attached and detached. Next, when the connecting rod 25 is pulled up while pressing the leaf spring 16 with a hand or the like, the shaft portion 12a of the pressure roller 12 is guided by the movable claw portion 24 and is moved to the rounded portion 24b at the upper end portion of the engaging portion 24a. As shown in FIG. 4, the leaf spring 16 is restrained against the spring force and restrained in a substantially horizontal state. When the fixing nut 19 is loosened by one turn with a spanner 20 or the like from this constrained state as shown in FIG. 5, the fixing nut 19 can be easily rotated by hand and the pressure roller 12 is easily removed. be able to. Thereby, working time can be shortened and working labor can be remarkably reduced. Further, when the restraining jig 21 is removed from the pressure roller 12 that has been removed, the principle of the lever is used by a removal tool 27 made of a rod-like body or the like, as shown in FIG. That is, a force is applied to the force point at the tip of the removal tool 27, and a pressing force is applied to the connecting rod 25 of the movable claw portion 24 by the lever principle. At this time, when the connecting rod 25 is pulled down while holding the restraining jig 21 with a hand or the like, the movable claw portion 24 is pry open, so that the restraining jig 21 can be easily removed from the pressure roller 12.

  According to the first embodiment, if the plate spring of the pressure roller is restrained by a restraining jig, the fixing nut of the pressure roller is loosened by about one turn with a spanner or the like, and then the fixing nut is manually rotated. The pressure roller can be easily removed. As a result, it is possible to shorten the working time at one pressure roller by about 3 minutes.

Embodiment 2. FIG.
FIG. 7 is a side view showing a restraining jig used as a pressure roller attaching / detaching device for a moving handrail for a man conveyor according to Embodiment 2 of the present invention.
In the first embodiment described above, the restraining jig 21 in which the fixed claw portion 23 is provided at one end portion of the base 22 and the movable claw portion 24 is provided at the other end portion of the base 22 so as to face the fixed claw portion 23 will be described. However, in the second embodiment, the fixed claw portion at one end is stopped, and the movable claw portions 24 are provided at both ends of the base 21. Other configurations are the same as those in the first embodiment.

  In the second embodiment, since both end portions are movable claw portions, substantially the same effect as in the first embodiment can be obtained, but the handling is slightly complicated.

It is a schematic side view which shows the man conveyor provided with the handrail drive device to which the pressure roller attaching / detaching apparatus of the moving handrail for man conveyor in Embodiment 1 of this invention is applied. It is a perspective view which shows the restraining jig | tool used as a pressure roller attaching / detaching apparatus of the moving handrail for man conveyors in Embodiment 1 of this invention. It is an expansion perspective view which shows the method of attaching the restraining jig | tool used as a pressure roller attaching / detaching apparatus of the moving handrail for man conveyors in Embodiment 1 of this invention. It is a side view which shows the usage method of the restraining jig | tool used as a pressure roller attachment / detachment apparatus of the moving handrail for man conveyors in Embodiment 1 of this invention. It is a side view which shows the method of removing a pressure roller with the restraint jig used as a pressure roller attachment / detachment apparatus of the moving handrail for man conveyors in Embodiment 1 of this invention. It is a perspective view which shows the method of removing the restraining jig | tool used as a pressure roller attaching / detaching apparatus of the moving handrail for man conveyors in Embodiment 1 of this invention. It is a side view which shows the restraining jig | tool used as a pressure roller attaching / detaching apparatus of the moving handrail for man conveyors in Embodiment 2 of this invention. It is a side view which shows the pressure roller attaching / detaching apparatus of the conventional handrail for man conveyors. It is a side view which shows the method of removing a pressure roller with the pressure roller attachment / detachment apparatus of the conventional moving handrail for man conveyors.

Explanation of symbols

1 truss
2 Step 3 Moving Handrail 4 Drive Sprocket 5 Drive Force Transmission Chain 6 Drive Machine 10 Handrail Drive Device 11 Drive Roller
12 Pressure Roller 13 Driving Force Transmission Sprocket 14 Chain Tension Adjustment Sprocket 15 Handrail Drive Chain 16 Plate Spring 17 Pressure Roller Fixing Plate (Bolt Integrated Structure)
18 Leaf spring retainer 19 Fixing nut 20 Spanner etc.
DESCRIPTION OF SYMBOLS 21 Restraint jig 22 Base 22a Relief hole 23 Fixed nail | claw part 23a Engagement part 23b Earl process part 24 Movable claw part 24a Engagement part 24b Earl process part 25 Connection rod 26 Position adjustment screw 27 Removal tool (bar-shaped body)

Claims (8)

A driving roller that drives a moving handrail that circulates in synchronization with the steps;
A pressure roller disposed at a position facing the drive roller across a moving handrail;
A leaf spring provided between the pressure rollers and constantly pressing the pressure roller against the drive roller;
A pressure roller fixing plate which is provided on the moving handrail side of the leaf spring, and the bolt portion of an integral structure extends to the anti-moving handrail side of the leaf spring;
A leaf spring retainer provided on the anti-moving handrail side of the leaf spring;
A fixing nut that is screwed into a bolt portion of the pressure roller fixing plate and that arranges the pressure roller in a normal mounting state;
A restraining jig that is detachably attached to the pressure roller in a normal attachment state of the pressure roller and restrains the leaf spring from being in a free state ;
The restraining jig is provided at one end of the base, a fixed claw that engages with the shaft of one pressure roller, and movably provided at the other end of the base. A pressure roller attaching / detaching device for a moving handrail for a man conveyor, comprising a movable claw portion engaged with a shaft portion of the pressure roller.   The restraining jig includes a base having a relief hole through which a bolt portion of the pressure roller fixing plate passes, and an engaging portion that is provided at one end portion of the base and engages with a shaft portion of one pressure roller. A pair of front and rear movable claws, and a pair of front and rear movable claws having an engaging portion that engages with a shaft portion of the other pressure roller. The pressure roller attaching / detaching device for a moving handrail for a man conveyor according to claim 1, further comprising a connecting rod provided between the claw portions. The length to the tip portion of the movable claw portion, claim 1 or claim 2, characterized in that the leaf spring is selected to the length of the overlap on the shaft of a even pressure roller in a free state A pressure roller attaching / detaching device for a moving handrail for a man conveyor as described. 3. A pressure roller for a moving handrail for a man conveyor according to claim 2 , wherein a rounded portion is provided on an upper portion of the engaging portion with which the shaft portion of the pressure roller of the movable claw portion is engaged. Detachable device.   2. The restraint jig includes a base and movable claw portions that are movably provided at both ends of the base and engage with the shaft portion of the pressure roller. A pressure roller attaching / detaching device for a moving handrail.   The restraining jig is movably provided on the base having a relief hole through which the bolt portion of the pressure roller fixing plate passes, and on both ends of the base, and engages with the shaft portion of the pressure roller. The pressure of the moving handrail for a man conveyor according to claim 1, further comprising: a pair of front and rear movable claw portions having an engaging portion; and a connecting rod provided between the pair of front and rear movable claw portions. Roller attaching / detaching device. A driving roller that drives a moving handrail that circulates in synchronization with the steps;
A pressure roller disposed at a position facing the drive roller across a moving handrail;
A leaf spring provided between the pressure rollers and constantly pressing the pressure roller against the drive roller;
A pressure roller fixing plate which is provided on the moving handrail side of the leaf spring, and the bolt portion of an integral structure extends to the anti-moving handrail side of the leaf spring;
A leaf spring retainer provided on the anti-moving handrail side of the leaf spring;
A fixing nut that is screwed into a bolt portion of the pressure roller fixing plate, and that arranges the pressure roller in a normal mounting state;
Pressure roller attachment / detachment of a moving handrail for a man conveyor having a restraining jig which is detachably attached to the pressure roller in a normal attachment state of the pressure roller and restrains the leaf spring from being in a free state. In the device
At the time of replacing the pressure roller, a step of temporarily attaching one end of the restraining jig to the shaft portion of one pressure roller, and the other end of the restraining jig to the shaft portion of the other pressure roller The step of temporarily attaching, and then moving the other end of the restraining jig to move both ends of the restraining jig between the axial portions of both pressure rollers so that the leaf spring is free. And a step of rotating the fixing nut with a spanner or the like while the leaf spring is constrained, and a step of rotating the fixing nut by hand thereafter. A pressure roller attaching / detaching method for a moving handrail for a man conveyor. A driving roller that drives a moving handrail that circulates in synchronization with the steps;
A pressure roller disposed at a position facing the drive roller across a moving handrail;
A leaf spring provided between the pressure rollers and constantly pressing the pressure roller against the drive roller;
A pressure roller fixing plate which is provided on the moving handrail side of the leaf spring, and the bolt portion of an integral structure extends to the anti-moving handrail side of the leaf spring;
A leaf spring retainer provided on the anti-moving handrail side of the leaf spring;
A fixing nut that is screwed into a bolt portion of the pressure roller fixing plate, and that arranges the pressure roller in a normal mounting state;
A restraining jig that is detachably attached to the pressure roller in a normal mounting state of the pressure roller and restrains the leaf spring from being in a free state. The restraining jig includes a base and the base A fixed claw portion that is provided at one end of the pressure roller and engages with the shaft portion of one pressure roller, and a movable claw portion that is movably provided at the other end portion of the base and engages with the shaft portion of the other pressure roller. In a pressure roller attaching / detaching device for a moving handrail for a man conveyor provided with a claw portion,
At the time of replacing the pressure roller, a step of temporarily attaching the fixing claw portion at one end of the restraining jig to the shaft portion of one pressure roller and temporarily attaching the fixing claw portion to the shaft portion of the other pressure roller A step of placing and temporarily attaching the movable claw portion at the other end portion of the restraining jig, and then moving the movable claw portion at the other end portion of the restraining jig to move both end portions of the restraining jig. Engaging the fixed claw portion and the movable claw portion between the shaft portions of both the pressure rollers in a fully mounted state to restrain the leaf spring from being free, and the leaf spring being restrained And a method of rotating the fixing nut with a spanner or the like and then rotating the fixing nut with a hand.

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