JP2013154997A - Passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a passenger conveyor in which even when a step chain is constituted by connecting a plurality of chains in parallel, stress exerted on a roller support shaft to be connected to the step chain at an step can be reduced and which is excellent in durability.SOLUTION: A passenger conveyor includes: a plurality of steps to be moved circularly in parallel to a handrail in a main frame; a roller support shaft 18 which is arranged at each step and is extended to the lateral direction; and a pair of right-and-left endless step chains 30 which are arranged on both lateral sides of each step and connected to the roller support shaft 18. The step chain 30 includes an inside chain 30a and an outside chain 30b disposed on the outside of the inside chain 30a. The outside chain 30b is connected to the roller support shaft 18 and a space S is formed between the inside chain 30a and the roller support shaft 18.

Description

  The present invention relates to a passenger conveyor.

  The passenger conveyor has a pair of left and right railings erected in parallel to each other at intervals, a main frame provided at the lower part of the left and right balustrades, and a plurality of steps that circulate in the main frame in parallel with the balustrade; Left and right roller support shafts provided at each step, a roller rotatably supported by the roller support shafts, and a pair of left and right endless shapes connected to the roller support shafts at both left and right sides of each step A step chain and a guide rail on which the roller rolls are provided, and the step chain is driven by the drive mechanism so that the step connected to the step chain via the roller support shaft is between the entrance and the exit. It is designed to circulate (see, for example, Patent Document 1 below).

JP 2006-52052 A

  By the way, in the passenger conveyor with a long step chain moving distance, the burden on the step chain is large. Therefore, it is conceivable to increase the strength of the step chain by connecting a plurality of chains in the left-right direction (that is, in parallel).

  However, when a composite chain formed by connecting a plurality of chains in parallel as described above is connected to the roller support shaft on both the left and right sides of the step, the composite chain provided on the left side of the step and the right side of the step If there is a difference in the amount of looseness (elongation) generated in the composite chain with the composite chain provided on the roller, the stress acting on the roller support shaft increases, and the roller support shaft is likely to be damaged.

  Accordingly, an object of the present invention is to provide a passenger conveyor that can suppress stress acting on a roller support shaft and has excellent durability even if a chain configured by connecting a plurality of chains in parallel is connected to the roller support shaft. .

  The passenger conveyor according to the embodiment circulates and moves in parallel with the balustrade in a pair of left and right balustrades erected in parallel with each other at intervals, a main frame provided at a lower portion of the balustrade, and the main frame A plurality of steps, a roller support shaft provided in the step extending in the left-right direction, a roller rotatably supported by the roller support shaft, and provided on both left and right sides of the step and connected to the roller support shaft. A pair of left and right endless step chains and a guide rail on which the roller rolls. The step chain includes an inner chain and an outer chain disposed outside the inner chain, and the outer chain. Is connected to the roller support shaft, and a gap is provided between the inner chain and the roller support shaft.

It is a side view of the passenger conveyor concerning a 1st embodiment. It is a top view of the step chain and step of the passenger conveyor of FIG. It is a fragmentary sectional view which shows the connection part of the step chain and roller spindle of the passenger conveyor of FIG. FIG. 5 is a schematic plan view of a step chain and a roller support shaft showing stress acting on the roller support shaft when there is a difference in the amount of extension between the left and right step chains. It is a fragmentary sectional view which shows the connection part of the step chain of the passenger conveyor which concerns on 2nd Embodiment, and a roller spindle.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  In the present embodiment, a case will be described in which the passenger conveyor 10 is an escalator that is installed to be inclined across the upper and lower floors of a building as illustrated in FIG. 1, and the steps move across the upper and lower floors. It can also be applied to moving walkways that move in the direction.

  The passenger conveyor 10 of the present embodiment includes a main frame 11 called a truss installed under the floor across the upper and lower floors of a building or the like. Inside the main frame 11, a pair of left and right sprockets 12 are arranged on the upper floor side and the lower floor side, respectively, and a pair of left and right sprockets 12 is disposed between the upper floor side sprocket 12 and the lower floor side sprocket 12. Endless step chains 30 are wound around each. At least one of the upper-floor side or lower-floor side sprockets 12 is structured to rotate by driving of a driving device 14 having an electric motor, a speed reducer, and the like. When the sprocket 12 rotates, the driving force is transmitted to the step chain 30 that meshes with the sprocket 12, and the step chain 30 circulates and moves in the main frame 11 over the upper and lower floors.

  On the main frame 11, a pair of left and right balustrades 16 are erected in parallel with each other with a predetermined interval corresponding to the width of step 15. A handrail belt 17 is attached around each balustrade 16. The handrail belt 17 circulates around the balustrade 16 in synchronism with the circulation movement of step 15 by driving of the driving device 14.

  As shown in FIG. 2, each step 15 is provided with a roller support shaft 18 extending in the left-right direction (width direction), and the roller 13 is rotatably supported on the roller support shaft 18. Step chains 30 are respectively provided on the left and right sides of each step 15. The pair of left and right step chains 30 are respectively connected to the roller support shafts 18 of the plurality of steps 15 arranged so as to be arranged at predetermined intervals in the longitudinal direction, so that the main frame 11 is interposed between the pair of left and right step chains 30. A plurality of steps 15 that circulate and move are connected.

  The pair of left and right step chains 30 circulates and moves in the main frame 11 by the rotation of the sprocket 12, so that a plurality of steps 15 connected to the step chain 30 change the direction at the position of the sprocket 12 and move in the main frame 11. It moves cyclically. A pair of left and right guide rails 19 are provided in the main frame 11. A number of steps 15 that circulate and move within the main frame 11 are guided in the moving direction by the roller 13 that is rotatably supported by the roller support shaft 18 rolling on the guide rail 19.

  In the passenger conveyor 10 having the above-described configuration, the left and right step chains 30 provided on the left and right sides of the plurality of steps 15 are composed of a composite chain formed by connecting a plurality of chains in the left-right direction. Since the step chains 30 provided on the left and right sides of the step 15 are symmetrical with each other, the step chain 30 provided on the right side of the step 15 will be described here.

  As shown in FIGS. 2 and 3, the step chain 30 is formed by connecting two chains including an inner chain 30 a and an outer chain 30 b arranged outside the inner chain 30 a in parallel in this embodiment. Become.

  The inner chain 30a is formed by alternately rotating the first link 31 and the second link 32, and the first link 31 and the second link 32 are arranged to be opposed to each other at an interval. It has a pair of link plates 33 and 34 and a pair of pins 35 that connect them together.

  The adjacent first link 31 and second link 32 are rotatably connected via a pin 35, and the link plates 33 and 34 of the first link 31 are outside the link plates 33 and 34 of the second link 32. Is arranged. A roller 13 is rotatably mounted on the outer periphery of the pin 35.

  The outer chain 30b basically has the same structure as the inner chain 30a, and is formed by alternately connecting the first link 31 and the second link 32 so as to be rotatable. The two links 32 have a pair of left and right link plates 33 and 34 that are opposed to each other with a space therebetween, and a pair of pins 35 that connect them to each other.

  The pin 35 that connects the link plates 33 and 34 in the outer chain 30b is integrally provided with the pin 35 of the inner chain 30a. That is, the pin 35 penetrates the link plates 33 and 34 of the inner chain 30a and the link plates 33 and 34 of the outer chain 30b, and connects the inner chain 30a and the outer chain 30b arranged in parallel.

  As shown in FIG. 3, the step chain 30 formed by connecting the inner chain 30a and the outer chain 30b arranged in the left-right direction is arranged at every repetition pitch of the steps 15 arranged so as to be arranged at predetermined intervals. The inner shaft hole 37 is provided in the link plates 33 and 34 of the inner chain 30a, and the outer shaft hole 38 is provided in the link plates 33 and 34 of the outer chain 30b. The roller support shaft 18 provided in the step 15 is inserted into the inner shaft hole 37 and the outer shaft hole 38, and the shaft end portion of the roller support shaft 18 protrudes outward from the outer chain 30b. The shaft end portion of the roller support shaft 18 protruding from the outer chain 30b holds the roller 13 in a rotatable state.

  The inner shaft hole 37 provided in the inner chain 30 a has an inner diameter larger than the outer diameter of the roller support shaft 18, and a gap S is provided between the link plates 33 and 34 of the inner chain 30 a and the roller support shaft 18. The inner chain 30 a is not in contact with the roller support shaft 18.

  A boss member 39 is inserted into the outer shaft hole 38 provided in the outer chain 30b, and the boss member 39 adheres to the link plates 33 and 34 of the outer chain 30b without any gap. The boss member 39 is provided with an insertion hole 39a, and the shaft end portion of the roller support shaft 18, specifically, the portion located outward from the inner chain 30a is in a tight state with no gap in the insertion hole 39a. Is inserted through.

  As a result, the step chain 30 has the outer chain 30 b connected to the roller support shaft 18 via the boss member 39. That is, the pair of left and right step chains 30 provided on the left and right side portions of the step 15 has the outer chain 30 b connected to the roller support shaft 18, and the driving force transmitted from the driving device 14 to the step chain 30 via the sprocket 12. Is transmitted from the outer chain 30b to the roller support shaft 18. Since a gap S is provided between the inner chain 30a and the roller support shaft 18, the driving force transmitted from the driving device 14 to the step chain 30 is transmitted. The inner chain 30 a is not transmitted to the roller spindle 18.

  In the passenger conveyor 10 of this embodiment as described above, when there is a difference in elongation between the step chain 30 provided on the left side of Step 15 and the step chain 30 provided on the right side, for example, FIG. In the case where the extension amount of the step chain 30 provided on the right side than the left side of the step 15 is large, the roller support shaft 18 that connects the step chains 30 provided on the left and right sides of the step 15 includes: A stress in a direction perpendicular to the axial direction of the roller spindle 18 (moving direction of the step chain 30) acts.

  At that time, in the passenger conveyor 10 of the present embodiment, the outer chain 30b of the step chain 30 is connected to the roller support shaft 18, and a gap S is provided between the inner chain 30a and the roller support shaft 18. Stress on the support shaft 18 due to the difference in the amount of extension of the left and right step chains 30 acts on the position where it is connected to the outer chain 30b, and does not act on the position of the left and right inner chains 30a.

  As a result, even if the step chain 30 is composed of a composite chain including the inner chain 30a and the outer chain 30b, the stress force point A acting on the roller support shaft 18 due to the difference ΔX in the extension amount of the left and right step chains 30 acts. Since the distance C along the axial direction with the point B can be increased, the stress acting on the roller support shaft 18 can be reduced, and the durability can be improved.

  In the present embodiment, the outer chain 30b is connected to the roller support shaft 18 via the boss member 39. However, the outer chain 30b is directly connected to the roller support shaft 18 without providing the boss member 39. The chain 30b and the roller support shaft 18 may be connected.

  In this embodiment, the step chain 30 is a composite chain in which two chains of the inner chain 30a and the outer chain 30b are connected in parallel. However, the step chain 30 is connected to three or more chains in parallel. You may comprise with the composite chain which was made. Thus, when the step chain 30 is composed of a composite chain composed of three or more chains, the outer chain 30b connected to the roller support shaft 18 is provided with a gap S between the roller support shaft 18 and the roller support shaft. As long as the chain is located on the outer side in the axial direction of the roller support shaft 18 from the inner chain 30a not in contact with the shaft 18, any of a plurality of chains constituting the step chain 30 may be used. Since the acting stress can be reduced as much as possible, the outermost chain is the outer chain 30b connected to the roller support shaft 18, and the other chains are the roller support shaft 18 in the same manner as the inner chain 30a. It is preferable to provide a gap S between the two.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the thing of the same structure as 1st Embodiment, and description of the structure is abbreviate | omitted.

  In the present embodiment, as shown in FIG. 5, the left and right ends of the roller support shaft 18 are connected to the outer chain 30b via the boss member 39, and the roller support shaft 18 is connected to the outer support 30a by the connection portion 18a. A reinforcing portion 18b having a larger cross-sectional area than the connecting portion 18a is provided at a position close to the center in the axial direction, that is, at a position sandwiched between the left and right connecting portions 18a.

  The reinforcing portion 18b is inserted through an inner shaft hole 37 provided in the inner chain 30a of the step chain 30, but, as in the first embodiment, between the reinforcing portion 18b and the link plates 33 and 34 of the inner chain 30a. Is provided with a clearance S, and the inner chain 30 a is not in contact with the roller support shaft 18.

  Even in the case of this embodiment, in addition to obtaining the same effects as those of the first embodiment described above, the roller support shaft 18 includes the reinforcing portion 18b having a larger cross-sectional area than the connecting portion 18a. The rigidity of the roller support shaft 18 can be increased, and the durability can be further improved.

  As mentioned above, although embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 10 ... Passenger conveyor 11 ... Main frame 12 ... Sprocket 13 ... Roller 14 ... Drive apparatus 15 ... Step 16 ... Railing 17 ... Handrail belt 18 ... Roller spindle 18a ... Connection part 18b ... Reinforcement part 19 ... Guide rail 30 ... Step chain 30a ... inner chain 30b ... outer chain 31 ... first link 32 ... second link 33 ... link plate 35 ... pin 36 ... roller 37 ... inner shaft hole 38 ... outer shaft hole 39 ... boss member 39a ... insertion hole S ... gap

Claims (2)

A pair of right and left balustrades standing in parallel with each other,
A main frame provided at the bottom of the balustrade;
A plurality of steps circulating in the main frame in parallel with the balustrade;
A roller support shaft extending in the left-right direction provided in the step;
A roller rotatably supported by the roller support shaft;
A pair of left and right endless step chains provided on the left and right sides of the step and connected to the roller spindle;
A guide rail on which the roller rolls,
The step chain includes an inner chain and an outer chain disposed outside the inner chain, the outer chain is connected to the roller spindle, and a gap is provided between the inner chain and the roller spindle. Passenger conveyor characterized by being provided.   The roller support shaft includes a connecting portion connected to the outer chain, and a reinforcing portion positioned closer to the center in the axial direction of the roller support shaft than the connecting portion and having a larger cross-sectional area than the connecting portion. The passenger conveyor according to claim 1.

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