JP2007284155A - Passenger conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce lateral width dimension of a passenger conveyor, in the passenger conveyor provided with a chain drive mechanism applying a trochoidal decelerator and interposing a thrust transmission member between a chain in which a plurality of stepping parts are connected in an endless shape and a pivoting member. <P>SOLUTION: The passenger conveyor is provided with the chain drive mechanism 6 for driving the chain 5 in which the plurality of stepping parts 4 are connected in the endless shape, and the chain drive mechanism 6 is provided with the pivoting member 11 pivoted/moved accompanying with eccentric rotation of crank shafts 10, 16; and the thrust transmission member 12 driven and circulated/moved by the pivoted/moved pivoting member 11 and giving thrust to the chain 5. The pivoting member 11, the thrust transmission member 12 and the chain 5 are arranged in an area including a vertical plane parallel to an advancement direction of the stepping part 4 in a vertical direction, the thrust transmission member 12 and the pivoting member 11 are arranged in the approximately same area, and the chain 5 is arranged so as to be approximately included in the area where the thrust transmission member 12 is arranged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to passenger conveyors such as escalators and moving walkways.

  Passenger conveyors such as escalators and moving walkways are provided with a plurality of stepping portions provided with guide rollers on the front and rear sides. The plurality of treads are supported by engaging each guide roller with a guide rail installed on a structure called a truss, and circulate between the entrance and exit while maintaining a horizontal state. Moving. Normally, a plurality of stepped portions are connected by a chain, and by driving this chain, all the stepped portions move in synchronism with no gap.

  The drive mechanism that drives the chain is generally of a type that drives the end of the chain in the direction of circulation with a sprocket. Such a drive mechanism is provided in the vicinity of the entrance or exit of the passenger conveyor.

  However, in a passenger conveyor having a long moving distance, a load acting on the chain becomes large, and therefore, it may not be possible to obtain a sufficient driving force only by driving at the end of the chain. Therefore, in an escalator which is a passenger conveyor having a long moving distance, as shown in FIG. 8 of the following Patent Document 1, driving force in the middle of a long step chain (part other than the end where the step chain changes its moving direction and reverses). It has been proposed to arrange a drive mechanism that can provide This drive mechanism will be described with reference to FIGS. 8 (a) and 8 (b).

  The driving mechanism 100 shown in FIGS. 8A and 8B uses a toothed step chain 102 as a step chain for connecting a plurality of steps 101, and a pin roller 103 that meshes with a tooth 102a portion of the toothed step chain 102. The drive chain 104 is provided, and the toothed step chain 102 is driven by the drive chain 104. According to this drive mechanism 100, the meshing area between the toothed step chain 102 and the drive chain 104 is widened, and the driving force transmission performance to the toothed step chain 102 by the drive mechanism 100 is improved.

  However, when such a toothed step chain 102 is used as a step chain, speed unevenness occurs at the end of the escalator where the toothed step chain 102 changes and reverses in comparison with a normal step chain. Therefore, it is difficult to reverse using a circular sprocket that rotates at a constant speed. Therefore, when the toothed step chain 102 is used as the step chain, it is necessary to reverse the toothed step chain 102 using a pseudo arc-shaped guide rail or the like, and the toothed step chain 102 is connected to the end of the escalator. It is difficult to use an inexpensive and standard sprocket as a mechanism that reversely drives at the position.

  A trochoidal speed reducer that uses a trochoidal tooth profile to perform linear driving is applied as a driving mechanism that appropriately applies driving force to a linear portion of a normal step chain without using the above-described toothed step chain 102 as a step chain. Things are considered effective. Trochoidal reduction gears are used, for example, in the industrial robot field and the automatic equipment field.

  As such a trochoidal speed reducer, the one described in FIG. 9 of Patent Document 1 below is known. This trochoidal speed reducer will be described with reference to FIG.

  The trochoidal speed reducer 110 shown in FIG. 9 includes an eccentric crankshaft 111 that is connected to a motor and rotates, a swing plate 112 that is connected to the eccentric crankshaft 111 and swings as the eccentric crankshaft 111 rotates, The oscillating plate 112 is provided with a linear motion body 113 that is linearly driven by being given a thrust by oscillating motion. In this trochoidal speed reducer 110, a plurality of pins 113a are attached at equal intervals along the moving direction of the linear motion body 113, and trochoidal teeth 112a provided on the swing plate 112 mesh with the pins 113a. ing. When the motor is driven and the eccentric crankshaft 111 rotates once, the swinging plate 112 swings once, and the trochoidal tooth 112a moves the pin 113a attached to the linear motion body 113 at an equal speed by one pitch. .

  If the pin roller of the step chain has the same function as the pin 113a in the trochoidal speed reducer 110 as described above, a passenger conveyor drive mechanism to which the trochoidal speed reducer 110 is applied can be configured. Since the drive mechanism configured by applying the trochoidal speed reducer 110 has a speed reducing function, there is an advantage that the speed reducer essential in the drive mechanism 100 as shown in FIG. 8 can be reduced. . Further, since the drive mechanism to which the trochoidal speed reducer 110 is applied can directly drive a step chain having a standard structure of a passenger conveyor, a special step chain such as the toothed step chain 102 shown in FIG. 8 is not used. An inexpensive standard step chain can be used as it is, and an inexpensive and standard sprocket can be used as a mechanism for driving the step chain in reverse at the end position of the passenger conveyor.

  When the step chain is driven by a drive mechanism configured by applying the trochoidal speed reducer 110 as shown in FIG. 9, it is necessary to devise so that the step chain cannot be lifted by the force of the trochoidal teeth 112a. . For this reason, for example, a back support mechanism in which a large number of back support rollers are arranged is arranged on the back side of the step chain, that is, on the opposite side of the step chain in the portion that meshes with the trochoidal teeth 112a. It is necessary to prevent the chain from lifting.

  Providing the rear support mechanism having such a complicated configuration leads to an increase in the cost of the entire passenger conveyor, which is not preferable. For this reason, it is required to prevent the step chain from being lifted by meshing with the trochoidal tooth profile without providing a back surface support mechanism or simplifying the configuration.

  In order to simplify the configuration of the back support mechanism, it is effective to increase the rocking radius of the rocking plate and deepen the engagement of the trochoidal tooth 112a with the step chain. That is, if the meshing of the trochoidal tooth 112a with the step chain is deepened, the component force acting on the back support mechanism side of the force acting on the step chain from the trochoidal tooth 112a is reduced, so that the simple configuration is achieved. The back support mechanism can reliably prevent the step chain from being lifted.

  However, when the rocking radius of the rocking plate is increased, there arises a problem that vibration caused by the inertial force of the rocking plate increases. Such vibration is a factor that deteriorates the riding comfort of the passenger conveyor, so it needs to be suppressed as much as possible. Then, the inventor of this invention has proposed the passenger conveyor shown to FIG. 1 thru | or FIG. This passenger conveyor will be described with reference to FIGS.

  FIG. 10 shows an outline of an escalator 120 that is an example of a passenger conveyor. In the escalator 120, a plurality of chain drive mechanisms 122 for driving a step chain 121 extending in a substantially straight line are distributed. Each chain drive mechanism 122 is an application of a trochoidal speed reducer and includes an electric motor (rotary drive device) 124 attached to a structure 123 called a truss as shown in FIG. The electric motor 124 serves as a drive source for the chain drive mechanism 122, and an eccentric crankshaft 125 is connected to the electric motor 124. The eccentric crankshaft 125 is formed by fixing four eccentric discs 125b to a shaft portion 125a. The eccentric disc 125b is disposed with its position shifted along the axial direction of the shaft portion 125a, and is disposed at an eccentric position whose phase is shifted by 90 degrees with respect to the shaft center of the shaft portion 125a. . These eccentric discs 125b rotate eccentrically around the axis of the shaft portion when the electric motor 124 is driven.

  Rectangular swing plates 126 are fitted into the four eccentric discs 124a of the eccentric crankshaft 125, respectively. Four oscillating plates 126 are provided, and these oscillating plates 126 are arranged at a predetermined interval in the thickness direction, and each oscillating plate 126b of the eccentric crankshaft 125 is oscillated as it rotates eccentrically. Dynamic movement. In addition to the eccentric disc 125 b provided on the eccentric crankshaft 125, the swing plate 126 is fitted with an eccentric disc 127 b provided on the driven crankshaft 127. The driven crankshaft 127 is formed in the same shape as the eccentric crankshaft 125, and is formed by fixing four eccentric discs 127b to the shaft portion 127a. The driven crankshaft 127 is a shaft that is not directly driven by the electric motor 124. When the eccentric disc 125b of the eccentric crankshaft 125 rotates eccentrically, the eccentric disc 127b rotates eccentrically with the same eccentric amount as the eccentric disc 125b. Each rocking plate 126 rocks stably while maintaining its posture by fitting the eccentric disk 125 b of the eccentric crankshaft 125 and the eccentric disk 127 b of the driven crankshaft 127. Further, since the four eccentric discs 124a and the four eccentric discs 127b are shifted in phase from each other by 90 degrees, the four swing plates 126 are swung while maintaining a state in which the phases are shifted from each other by 90 degrees. To do.

  A plurality of oscillating rollers 126a are rotatably provided on the oscillating plate 126 on the outer peripheral portions on the upper end side and the lower end side, respectively. In FIG. 11, only a part of the plurality of swing rollers 126 a provided on each of the four swing plates 126 is illustrated for easy understanding of the structure of the chain drive mechanism 122.

  As a thrust transmission member that circulates between the outer periphery of the swing plate 126 where the swing roller 126 a is provided and the step chain 121 according to the swing motion of the swing plate 126 and applies thrust to the step chain 121. A circulating cord 128 is disposed. The circulating cord 128 has a plurality of links 128a, and these links 128a are connected in a caterpillar shape by a circulating roller 128b.

  A trochoidal inner tooth 128c is formed at a position on one side of the link 128a and serving as an inner peripheral side portion of the circulating cord 128. These trochoidal inner teeth 128 c are formed in a shape that can mesh with a swing roller 126 a provided on the outer periphery of the swing plate 126. Further, external teeth 128d having a shape capable of meshing with the pin roller 121a of the step chain 121 are formed at a position on one side of the link 128a and on the outer peripheral side portion of the circulating cord-like body 128. These external teeth 128d are formed in a shape that can mesh with the pin roller 121a of the step chain 121.

  A circulating rail 129 for guiding the circulating cable 128 that circulates and moves is attached to the structure 123. The circulation roller 129 is engaged with the circulation rail 129. By this engagement, the circulation cord 128 is supported by the circulation rail 129 and is guided along the circulation rail 129 when the swing plate 126 swings. And the step chain 121 circulate.

  In the chain drive mechanism 122 configured as described above, when the electric motor 124 is driven, the eccentric crankshaft 125 is rotated by the driving force from the electric motor 124 and is fixed to the eccentric crankshaft 125. The four eccentric discs 125b rotate eccentrically. As the eccentric discs 125b rotate eccentrically, the four swing plates 126 swing and move while maintaining a state in which the phases are shifted from each other by 90 degrees. When the swinging plate 126 swings, the driven crankshaft 127 rotates in the same manner as the eccentric crankshaft 125, and the eccentric disc 127b of the driven crankshaft 127 rotates eccentrically in the same manner as the eccentric disc 125b.

  When these four oscillating plates 126 oscillate, the oscillating rollers 126 a provided on the outer peripheral portions of the upper end side and the lower end side of each oscillating plate 126 are moved to the inner peripheral side of the circulating cord 128. The trochoidal inner teeth 128 c formed in the portion are sequentially meshed with each other, and the circulating cord 128 is circulated along the circulation rail 129. Then, the circulating cable 128 circulates and moves, whereby a thrust is transmitted to the pin roller 121a meshing with the external teeth 128d formed on the outer peripheral side portion of the circulating cable 128, and the step chain 121 is driven.

  In this chain drive mechanism 122, as described above, the circulating rope 128 as a thrust transmission member is interposed between the swing plate 126 and the step chain 121, and the swing roller 126 a provided on the swing plate 126. Is meshed with trochoidal inner teeth 128 c formed on the circulating cord 128, and external teeth 128 d formed on the circulating cord 128 are meshed with the pin rollers 121 a of the step chain 121. The circulating cable 128 is circulated and moved by the oscillating motion of the oscillating plate 126, and a thrust is applied to the pin roller 121 a of the step chain 121 as the circulating cable 128 circulates and moves.

  Therefore, in the escalator 120 having such a chain drive mechanism 122, the trochoidal inner teeth 128c and outer teeth 128d of the circulating cord 128 are optimally structured, and the outer teeth 128d of the circulating cord 128 are stepped. By engaging deeply with the pin roller 121a of the chain 121, it is possible to efficiently transmit thrust from the trochoidal inner teeth 128c to the pin roller 121a. In particular, the circulating rope 128 is supported by the circulating rail 129 by engaging the circulating roller 128b with the circulating rail 129. Therefore, the external teeth 128d of the circulating rope 128 and the pin rollers 121a of the step chain 121 The back support mechanism for maintaining the engagement by suppressing the back side of the step chain 121 can be eliminated. And since the burden to the step chain 121 when thrust is transmitted to the step chain 121 can be reduced, the reliability and durability of the step chain 121 can be improved.

  Furthermore, since the rocking radius of the rocking plate 126 can be reduced by optimizing the external teeth 128d, generation of vibration and noise can be suppressed, and a good ride comfort of the passenger conveyor is ensured. can do. Further, since the drive thrust of the chain drive mechanism 122 is increased by the smaller swing radius of the swing plate 126 and the function as a speed reducer is enhanced, it is not necessary to provide a speed reducer separately. Further, a small motor (a motor having a small torque but a high rated rotational speed and having a high volumetric efficiency with respect to the output watt) can be used as the electric motor 124 that is a drive source.

  In the above description, the swing roller 126a is provided on the outer peripheral portion of the swing plate 126 provided in the chain drive mechanism 122, and the trochoidal inner teeth 128c are provided on the inner peripheral portion of the circulation cord-shaped body 128. An example in which the swinging motion of the swinging plate 126 is transmitted to the circulating cord-like body 128 by meshing the moving roller 126a and the internal teeth 128c, and the circulating cord-like body 128 is circulated and moved is described. However, the present invention is not limited to this example, and as shown in FIG. 12, a trochoidal roller rolling tooth 130 is formed on the outer peripheral portion of the swing plate 126, and a plurality of rollers are formed on the inner peripheral portion of the circulating cord 128. This roller 131 is provided, and the roller rolling teeth 130 and the roller 131 are engaged with each other, whereby the swinging motion of the swinging plate 126 is transmitted to the circulating cord 128, and the circulating cord 128 is circulated and moved. Even if it is made, the same effect as the example mentioned above can be acquired.

Moreover, in the passenger conveyor demonstrated above, the chain drive mechanism 122 which applied the trochoidal reduction gear is provided in the middle of the step chain 121 extended in a substantially straight line, and it is circular in the vicinity of the entrance and the exit where the step chain 121 reverses. Although a mechanism for driving the step chain 121 with the sprocket is provided, a chain drive mechanism 122 applying the trochoidal speed reducer as described above may also be provided near the entrance and exit where the step chain 121 is reversed. .
JP 2003-192263 A

  However, in the escalator 120 described in Patent Document 1, the following points are not considered.

  Since the circulating rope 128 having a trochoidal mechanism is interposed between the swinging plate 126 that swings and the step chain 121 that is finally driven, the horizontal width dimension in the horizontal direction depends on the arrangement of these. Becomes larger.

  Further, a collision sound is likely to be generated between the swing roller 126a and the trochoidal inner teeth 128c, or between the roller 131 and the trochoidal roller rolling teeth 130.

  Further, in the region where the trochoidal inner teeth 128c or the trochoidal roller rolling teeth 130 mesh with each other, the circulating cord 128 receives the force from the oscillating roller 126a or the roller rolling teeth 130. It is necessary to keep the force opposite to that force.

  In addition, since the circulating rope 128 is engaged with the step chain 121, if the moving surface when the connecting shaft of the step chain 121 moves and the moving surface where the connecting shaft of the circulating rope 128 moves are close to each other, the circulating rope 128 The meshing angle between the body 128 and the step chain 121 is deepened. However, it is difficult to mesh the two chains (circular cable 128 and step chain 121) with their connecting shafts close to each other.

  In addition, it is easy to circulate the circulating rope 128 along a path (circulation rail 129) having a straight path portion and an arcuate path portion, but the circulating rope 128 is a chain. Travels in a state where the link 128a is bent in a polygonal shape when traveling along the arcuate path portion, the pulsation in the direction along the traveling direction is generated in the circulating cord 128, and the circulating cord 128 Sag removal is required.

  The present invention has been made to solve such a problem, and an object of the present invention is to apply a trochoidal speed reducer, and to transmit a thrust transmission member between a swing member and a chain in which a plurality of stepped portions are connected endlessly. In the passenger conveyor equipped with a chain drive mechanism interposing the passenger conveyor, the width of the passenger conveyor can be reduced, quietness can be achieved, and the step chain is restrained from behind in the meshing region between the step chain and the trochoidal mechanism It is an object of the present invention to provide a passenger conveyor that can eliminate the mechanism and can eliminate the slack removal mechanism of the circulating cable.

  A first feature according to an embodiment of the present invention is that, in a passenger conveyor, a guide rail, a plurality of stepped portions that circulate along the guide rail, and a chain that connects the plurality of stepped portions endlessly A chain drive mechanism for driving the chain, the chain drive mechanism being connected to the rotation drive device, and an eccentric crankshaft that is connected to the rotation drive device and rotates eccentrically in response to the driving force of the rotation drive device. A swinging member connected to the eccentric crankshaft and swingingly moved in accordance with the eccentric rotation of the eccentric crankshaft; and the swinging member disposed between the swinging member and the chain and swingingly moved. A thrust transmission member that is driven by a member to circulate and applies thrust to the chain; a plurality of trochoidal teeth provided on one of the thrust transmission member or the swing member; and the thrust A plurality of rollers provided on the other side of the transmission member or the swinging member and meshing with the trochoidal teeth, and the swinging member, the thrust transmission member, and the chain, The region in which the swing member is disposed in substantially the same region as the thrust transmission member, and the chain is disposed in the region including the parallel vertical surface. It is substantially included in the inside.

  A second feature according to the embodiment of the present invention is that, in a passenger conveyor, a chain that circulates by connecting a plurality of stepping portions in an endless manner, a circulation rail, and a plurality that are engaged with the circulation rail. And a drive chain that drives the chain by circulatingly moving along the circulation rail, the circulation rail including a pair of linear path portions and these linear path portions. An arcuate path portion located on both ends of the linear path portion, and a connecting path portion connecting the linear path portion and the arcuate path portion, wherein the circulating roller is connected to the linear path portion. In the case of traveling between the arcuate path portions, the circulation roller is formed in a shape that proceeds at a constant speed.

  According to the present invention, a trochoidal speed reducer is applied to a passenger conveyor having a chain drive mechanism in which a thrust transmission member is interposed between a swing member and a chain, and the swing member, the thrust transmission member, and the chain are installed. The width dimension to be made can be reduced, and the width dimension of the passenger conveyor installation space can be reduced. Further, when the drive chain circulates along the circulation rail, the drive chain can be smoothly advanced without causing pulsation in the drive chain.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a passenger conveyor according to an embodiment of the present invention is configured as an escalator 1 that is installed across the upper and lower floors of a building, and is a structure called a truss that supports its own weight and passenger load. 2 is provided. A step guide rail 3 that is a guide rail is provided inside the structure 2 so as to circulate over the upper and lower floors of the building. And the step 4 which is a some step part which conveys a passenger circulates between the upper floor and lower floor of a building along the step guide rail 3. As shown in FIG.

  The plurality of steps 4 are connected endlessly by a step chain 5 which is a chain having pin rollers 5a. The step chain 5 is driven by a chain drive mechanism 6 or the like, and a plurality of steps 4 connected endlessly by this drive circulate along the step guide rail 3. The pin roller 5 a is engaged with the step guide rail 3, and a part of the plurality of pin rollers 5 a is also used as a step roller for holding the step 4.

  A pair of balustrades 7 are erected on the left and right sides of the plurality of steps 4 that circulate and move along the step guide rails 3. On the outer periphery of the balustrade 7, a handrail belt 8 that moves at substantially the same speed as the steps 4 is disposed.

  The chain drive mechanism 6 that drives the step chain 5 is provided in a portion where the step chain 5 is linear between the upper floor and the lower floor. In the reversing portion where the step chain 5 at the entrance and exit portions of the escalator 1 is reversed by changing the traveling direction, for example, a drive mechanism for driving the step chain 5 with a circular sprocket is provided. The illustration of the drive mechanism that drives the step chain 5 in the section is omitted.

  The chain drive mechanism 6 is an application of a trochoidal speed reducer. As shown in FIGS. 2 and 3, the chain drive mechanism 6 includes an electric motor 9 that is a rotary drive device, an eccentric crankshaft 10, and four pieces that are swing members. A rocking plate 11 and a circulating cable-like body 12 that is a drive chain as well as a thrust transmission member are provided. Further, the chain drive mechanism 6 includes a circulation rail 13 and holding rails 14a and 14b.

  The electric motor 9 is attached to the structure 2. The electric motor 9 serves as a drive source for the chain drive mechanism 6, and the driving force of the electric motor 9 is transmitted to the eccentric crankshaft 10 via the belt 15.

  The eccentric crankshaft 10 is formed by a shaft portion 10a and four eccentric discs 10b fixed to the shaft portion 10a. The eccentric discs 10b are arranged at equal intervals along the axial direction of the shaft portion 10a, and are arranged at eccentric positions whose phases are shifted from each other by 90 degrees. These eccentric discs 10b rotate eccentrically around the axis of the shaft portion 10a together with the shaft portion 10a when the electric motor 9 is driven.

  The oscillating plate 11 is a rectangular plate-shaped member, and four oscillating plates 11 are provided, and four eccentric discs 10b of the eccentric crankshaft 10 are fitted to each oscillating plate 11 one by one. The oscillating plate 11 oscillates as the eccentric disk 10b of the eccentric crankshaft 10 rotates eccentrically. Further, in addition to the eccentric disc 10 b provided on the eccentric crankshaft 10, an eccentric disc 16 b provided on the driven crankshaft 16 is fitted to these swing plates 11.

  Two driven crankshafts 16 are provided, the driven crankshaft 16 is formed in the same shape as the eccentric crankshaft 10, and has a shaft portion 16a and four eccentric discs 16b fixed to the shaft portion 16a, The shaft portion 10a and the shaft portion 16a are arranged in parallel directions. The driven crankshaft 16 is a shaft that is not directly driven by the electric motor 9, and when the eccentric disk 10b of the eccentric crankshaft 10 rotates eccentrically, the eccentric disk 16b rotates eccentrically with the same eccentric amount as the eccentric disk 10b.

  A brake device 17 is attached to one driven crankshaft 16. The brake device 17 is formed in a structure in which the rotation is stopped by holding the driven crankshaft 16 when the electric motor 9 is interrupted by a power failure or the operation of stopping the escalator 1 is performed. Has been.

  Each oscillating plate 11 oscillates while maintaining its posture by fitting the eccentric disk 10b of the eccentric crankshaft 10 and the eccentric disk 16b of the driven crankshaft 16 together. Since the four eccentric discs 10b and the four eccentric discs 16b are shifted in phase by 90 degrees, the four swing plates 11 swing while maintaining a state in which the phases are shifted by 90 degrees.

  Each swing plate 11 is formed with trochoidal teeth 11a on the outer peripheral portions on the upper end side and the lower end side, respectively.

  The circular cord-like body 12 includes a plurality of links 18 and a plurality of connecting shafts 19 that connect adjacent links 18, and the plurality of links 18 are connected by the connecting shafts 19 to form an endless caterpillar shape. Has been. A circulation roller 20 is attached to the end of the connecting shaft 19. The circulating cord-like body 12 is disposed between the swing plate 11 and the step chain 5, is driven by the swing plate 11 that swings and circulates, and applies thrust to the step chain 5.

  As shown in FIG. 4, the link 18 has a pair of link plates 18a, and a link body 18b and a plurality of rollers 21 are disposed between the pair of link plates 18a. The link body 18b is formed with a rising portion 18c that rises with a gap formed between the link plate 18a and the link plate 18a. Propulsion teeth 18d that engage with the pin roller 5a of the step chain 5 and transmit the driving force in the circulating movement direction to the step chain 5 are formed on the leading end side of the rising portion 18c. A connecting piece 18e is formed on both ends of the rising portion 18c, which is the direction connecting the link 18 and the link 18, and an insertion hole 18f through which the connecting shaft 19 is inserted is formed in the connecting piece 18e.

  A plurality of restraining rollers 22 are disposed in a gap portion between the rising portion 18c and the one link plate 18a and a gap portion between the rising portion 18c and the other link plate 18a. The circulation roller 20 is disposed at a position on the inner side of the outer surface of the one link plate 18a.

  As shown in FIG. 5, the roller 21 is rotatably supported between a pair of link plates 18a via a bearing 21a. The roller 21 is formed by fitting a resin cylinder portion 21c on the outer periphery of a metal shaft portion 21b. In addition, as a material which forms the cylinder part 21c, it may replace with resin and may use a damping steel material.

  The roller 21 meshes with a trochoidal tooth 11a formed on the swing plate 11, and as the swing plate 11 swings, a driving force is transmitted from the swing plate 11 to the roller 21, and this driving force. The circulating cord-like body 12 circulates and moves.

  The circulation rail 13 is formed in the structure 2 and is disposed along the circulation path of the circulation cord 12. A circulation roller 20 is engaged with the circulation rail 13.

  As shown in FIG. 6, the circulation rail 13 includes a pair of linear path portions 13 a extending along the traveling direction of the circulation cable-shaped body 12, and a pair positioned on both ends of these linear path portions 13 a. Are formed in a shape having an arcuate path portion 13b, and a connecting path portion 13c that connects the linear path portion 13a and the arcuate path portion 13b.

  The connecting path portion 13c is formed in a shape that allows the circulating roller 20 to travel at a constant speed when the circulating roller 20 travels between the linear path portion 13a and the arcuate path portion 13b. Specifically, the shape of the circulating roller 20 that travels between the linear path portion 13a and the arc-shaped path portion 13b is advanced at a constant speed as follows. When the arcuate road portion 13b occupies a part of the virtual circle A and the tangent to the virtual circle A extending in a direction parallel to the straight road portion 13a is B, the straight road portion 13a is The dimension “δ” is offset from the tangent line B. The straight path portion 13a and the arcuate path portion 13b are smoothly connected by the connecting path portion 13c. The offset dimension “δ”, the position “C” where the linear path portion 13a and the connecting path portion 13c are connected, and the position “D” where the connecting path portion 13c and the arcuate path portion 13b are connected are adjacent to each other. The value varies depending on the interval between the circulation rollers 20, the radius of the arcuate path portion 13 b, and the diameter of the circulation roller 20.

  As described above, since the shape of the circulation rail 13 is formed such that the circulation roller 20 advances at a constant speed, no pulsation is generated in the circulation cord-like body 12 that advances along the circulation rail 13. In order to suppress the pulsation, it is not necessary to provide a slack removing mechanism that pulls the circulating cable 12.

  The restraining rails 14 a and 14 b are formed on the structure 2 and are disposed along the circulation path of the circulating cord-like body 12 in a region where the trochoidal teeth 11 a formed on the swing plate 11 mesh with the rollers 21. ing. A plurality of restraining rollers 22 disposed on one side of the link 18 are engaged with the restraining rail 14a, and a plurality of restraining rollers 22 disposed on the other side of the link 18 are engaged with the restraining rail 14b. Yes. The restraining roller 22 is engaged with the restraining rails 14a and 14b by the restraining roller 22 being pressed against the restraining rails 14a and 14b so as to be able to roll. When the restraining roller 22 is engaged with the restraining rails 14a and 14b, when the swinging plate 11 swings, the circulation cord 12 is restricted from being displaced in the vertical direction, and the swinging plate 11 swings. Along with this, the circulation cord 12 is promoted to move in the circulation direction.

  When the pin roller 5a of the step chain 5 and the propulsion tooth 18d of the circulating cord 12 are engaged with each other, as shown in FIG. 7, the connecting shaft 19 is positioned on the side of the side surface of the pin roller 5a. As a result, the moving surface when the shaft center of the pin roller 5a of the step chain 5 moves and the moving surface where the connecting shaft 19 of the circulating cable 12 moves are brought close to each other, and the two attached to one link 18 are brought together. Engagement that is an angle formed by a straight line “a” that connects the connecting shafts 19 and a straight line “b” that connects the shaft center of the pin roller 5a that meshes with the propulsion teeth 18d positioned between the connecting shafts 19 and the two connecting shafts 19. The angle “α” becomes smaller (deeper).

  As shown in FIG. 3, the swing plate 11, the circulating cable 12, and the step chain 5 are arranged in a vertical direction in a region including a vertical plane parallel to the traveling direction of the step 4.

  With respect to the region in which the swing plate 11, the circulation cable 12 and the step chain 5 are disposed, the swing plate 11 and the circulation cable 12 are disposed in substantially the same region. Here, “substantially the same area” does not mean completely the same, but includes a case where one area is slightly larger than the other area. In this embodiment, the region of the four rocking plates 11 and the region of the roller 21 of the circulating cable 12 are the same, and the region of the circulating cable 12 is in relation to the region of the rocking plate 11. The thickness of the pair of link plates 18a is increased.

  Further, with respect to the region where the swing plate 11, the circulating rope 12 and the step chain 5 are disposed, the step chain 5 is substantially included in the region where the circulating rope 12 is disposed. It is installed. Here, “substantially included in the region” does not mean that it is completely included, but the region in which the step chain 5 is disposed is disposed in the circulation cord 12. The case where it protrudes slightly from the area | region made is also included.

  In such an escalator 1, in this escalator 1, driving force transmission to the step chain 5 is performed by a driving mechanism using a circular sprocket at the reversing portions at both ends of the step chain 5, and between the two reversing portions. Then, the driving force is transmitted by the chain driving mechanism 6. For this reason, even when the moving distance of the escalator 1 becomes long, a sufficient driving force can be applied to the step chain 5.

  The chain drive mechanism 6 is attached to the structure 2, and when the chain drive mechanism 6 is attached to the structure 2, the swing plate 11, the circulation cable 12, and the step chain 5 advance the step 4. It is arranged in the vertical direction in a region including a vertical plane parallel to the direction. Moreover, the circulating cable 12 and the swing plate 11 are disposed in substantially the same region, and the step chain 5 is disposed in a region substantially included in the region in which the circulating cable 12 is disposed. Yes. For this reason, the lateral width dimension in which the swing plate 11, the circulating cable 12 and the step chain 5 are installed can be reduced, and the lateral dimension of the installation space in which the escalator 1 including the chain drive mechanism 6 is installed is reduced. Can do.

  Further, the chain drive mechanism 6 includes a circulation rail 13, and the circulation roller 20 is engaged with the circulation rail 13 to advance, so that the circulation cord 12 is circulated uniformly along the circulation rail 13. be able to.

  In addition, since the circulation rail 13 is formed in a shape that allows the circulation roller 20 to travel at a constant speed, the occurrence of pulsation when the circulation cable 12 travels along the circulation roller 20 is prevented. It is possible to eliminate the slack removing mechanism that pulls the circulating cord-like body 12 in order to suppress the occurrence of pulsation.

  Further, the chain drive mechanism 6 includes holding rails 14a and 14b disposed along the circulation path of the circulating cord-like body 12 in a region where the trochoidal teeth 11a and the roller 21 mesh with each other. The restraining roller 22 is engaged with 14b. For this reason, when the rocking | swiveling board 11 rock | fluctuates, it can restrict | limit that the circular rope 12 displaces to an up-down direction.

  The roller 21 provided on the circulating cord 12 meshes with the trochoidal teeth 11 a formed on the swing plate 11, and the driving force in the circulation direction is applied to the circulating cord 12 from the swing plate 11. Voltage. The cylindrical portion 21c on the outer peripheral portion of the roller 21 is formed of a resin or a damping steel material. For this reason, when the roller 21 and the trochoidal tooth 11a mesh with each other and the driving force is transmitted, generation of noise from the meshing portion can be suppressed.

  A brake device 17 is attached to one driven crankshaft 16 connected to the swing plate 11, and the swing operation of the swing plate 11 can be restricted by driving the brake device 17. Then, by restricting the swinging movement of the swinging plate 11, the circulating movement operation of the circulating cable 12 and the circulating movement operation of the step chain 5 can be restricted. Since the braking device 17 can be driven with a small torque, the step chain 5 can be braked with a small torque.

  When the pin roller 5a of the step chain 5 and the propulsion tooth 18d of the circulating cable 12 mesh with each other, the coupling shaft 19 is positioned on the side of the side surface of the pin roller 5a, so that the meshing angle “α” is a small value. . As a result, the meshing between the propulsion tooth 18d and the pin roller 5a is deepened, and the step chain 5 that progresses due to the meshing with the propulsion tooth 18d is less likely to move away from the circulating cable-like body 12, and the step chain 5 is The mechanism which suppresses from the back which is can be made unnecessary.

  In the present embodiment, a case where trochoidal teeth 11 a are formed on the outer peripheral portions of the upper end side and the lower end side of the swing plate 11 and the roller 21 is attached to the link 18 of the circulating cord-like body 12 is taken as an example. As described above, rollers are attached to the outer peripheral portions of the upper end side and the lower end side of the rocking plate 11, trochoidal teeth are formed on the link 18 of the circulating cable-like body 12, and these rollers and trochoidal teeth are connected. You may bite.

  In the present embodiment, the escalator 1 has been described as an example of the passenger conveyor. However, the present invention can also be applied to passenger conveyors other than the escalator, such as a moving walkway.

It is a side view which shows roughly the whole structure of the escalator which concerns on one embodiment of this invention. It is a side view which shows the chain drive mechanism with which the escalator shown in FIG. 1 is provided, and a step chain. FIG. 3 is a front view showing a part of the chain drive mechanism and the step chain shown in FIG. 2 in section. It is a perspective view which shows the link which is a part of circulation cable-like body. It is a front view which shows the roller attached to the link in cross section. It is a schematic diagram which shows the shape of a circulation rail. It is a side view which shows the state which the propulsion tooth of the link and the pin roller of the step chain meshed. The escalator of a prior art example is shown, (a) is a side view which shows the whole structure schematically, (b) is a side view which shows a chain drive mechanism. It is a schematic diagram which shows the basic composition of a trochoidal reduction gear. It is a side view which shows roughly the whole structure of the escalator of another prior art example. It is a side view which shows the chain drive mechanism with which the escalator shown in FIG. 10 is provided. It is a side view which shows the modification of the chain drive mechanism shown in FIG.

Explanation of symbols

3 Guide rail 4 Step part 5 Chain 6 Chain drive mechanism 9 Rotation drive unit 10, 16 Eccentric crankshaft 11 Oscillating member 11a Trochoidal tooth 12 Thrust transmission member, drive chain 13 Circulating rail 13a Linear path 13b Arc shape Road portion 13c Connecting road portions 14a and 14b Holding rail 17 Brake device 18 Link 18d Propulsion tooth 19 Connecting shaft 20 Circulating roller 21 Roller 22 Holding roller

Claims (8)

A guide rail,
A plurality of stepping portions that circulate along the guide rail;
A chain for connecting the plurality of stepped portions in an endless manner;
A chain drive mechanism for driving the chain;
With
The chain drive mechanism is
A rotary drive device;
An eccentric crankshaft connected to the rotary drive device and rotating eccentrically in response to a driving force of the rotary drive device;
An oscillating member coupled to the eccentric crankshaft and oscillating with the eccentric rotation of the eccentric crankshaft;
A thrust transmission member disposed between the swing member and the chain, driven and circulated by the swing member that swings, and imparts thrust to the chain;
A plurality of trochoidal teeth provided on one of the thrust transmission member or the swing member;
A plurality of rollers provided on the other of the thrust transmission member or the swinging member and meshing with the trochoidal teeth;
With
The swing member, the thrust transmission member, and the chain are arranged in a vertical direction in a region including a vertical plane parallel to the traveling direction of the stepping portion,
The swing member and the thrust transmission member are disposed in substantially the same region,
A passenger conveyor characterized in that the chain is disposed so as to be substantially included in the region where the thrust transmission member is disposed.   The passenger conveyor according to claim 1, wherein the outer peripheral portion of the roller is made of resin or damping steel.   The passenger conveyor according to claim 1 or 2, wherein a brake device is provided on the eccentric crankshaft. The chain drive mechanism further includes a circulation rail disposed along a circulation path of the thrust transmission member,
The passenger conveyor according to any one of claims 1 to 3, wherein a circulation roller engaged with the circulation rail is provided on the thrust transmission member. The circulation rail includes a pair of linear road portions extending along a traveling direction of the thrust transmission member, a pair of arc-shaped road portions positioned on both ends of the linear road portions, and the linear shape. A connecting road part connecting the road part and the arcuate road part,
The connecting path part is formed in a shape that causes the circulating roller to travel at a constant speed when the circulating roller travels between the linear path part and the arcuate path part. Item 4. A passenger conveyor according to item 4. The chain drive mechanism further includes a holding rail disposed along a circulation path of the thrust transmission member in a region where the trochoidal teeth and the roller mesh with each other.
The passenger conveyor according to any one of claims 1 to 5, wherein a pressing roller engaged with the pressing rail is provided on the thrust transmission member. The thrust transmission member includes a plurality of links and a plurality of connecting shafts that connect the links,
The link is provided with a propulsion tooth that meshes with a pin roller provided on the chain,
The passenger conveyor according to any one of claims 1 to 6, wherein the connecting shaft is positioned on a side of a side surface of the pin roller when the propulsion tooth meshes with the pin roller. A chain that circulates by connecting a plurality of treads in an endless manner,
A circulation rail;
A drive chain that has a plurality of circulation rollers engaged with the circulation rail, and drives the chain by circulating movement along the circulation rail;
With
The circulation rail includes a pair of linear road portions, arc-shaped road portions positioned on both ends of the linear road portions, and a connecting road portion connecting the linear road portion and the arc-shaped road portion. Have
The connecting path portion is formed in a shape that allows the circulating roller to travel at a constant speed when the circulating roller travels between the linear path portion and the arcuate path portion. Conveyor.

Images