Passenger conveyor

Abstract

To provide a passenger conveyor capable of preventing leakage of oil between an oil pan and a frame.SOLUTION: This passenger conveyor comprises: a frame 2; an endless driving chain that circulates in the frame 2; a plurality of steps engaged with the driving chain to circulate; and an oil pan 25 attached to a lower part of the frame 2. The frame 2 includes a lower chord 22 to which the oil pan 25 is attached, and a lateral reinforcement 24 fixed to the lower chord 22. The oil pan 25 includes a base 251 that covers the lower surface of the frame 2, and rising parts 252 that protrude roughly perpendicularly from both ends of the base 251 in a width direction and are fixed to side surfaces of the frame 2. The lateral reinforcement 24 is positioned below the base 251 of the oil pan 25. The base 251 has welding holes 253 for welding the lateral reinforcement 24 and the lower chord 22.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a passenger conveyor. [Background technology]

[0002] A passenger conveyor comprises a frame installed in a building structure, boarding and alighting floors at both longitudinal ends of the frame, an endless driving chain that moves circulating between the boarding and alighting floors, and a plurality of steps that engage with the driving chain and move circulating between the boarding and alighting floors. Oil is supplied to the driving chain to ensure smooth sliding. For this reason, an oil pan is attached to the bottom of the frame to prevent oil from leaking below the frame.

[0003] Patent Document 1 discloses an oil pan for a passenger conveyor. Both widthwise ends of the oil pan disclosed in Patent Document 1 are placed on the inner upper surfaces of a pair of lower frames that form both widthwise sides of the lower main frame. Welding holes are formed at both widthwise ends of the oil pan. The inner periphery of the welding holes is welded to the lower frames, and the oil pan is fixed to the main frame. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-250831 Summary of the Invention [Problem to be solved by the invention]

[0005] However, because the oil pan disclosed in Patent Document 1 is mounted on the upper inner surface of the lower frame, there is a concern that if oil gets between the oil pan and the lower frame, the oil will leak below the lower frame. To prevent oil from getting between the oil pan and the lower frame, it is conceivable to weld the entire area between the oil pan and the lower frame. However, this increases the number of welds, making the installation of the oil pan on the frame more complicated and increasing costs.

[0006] In consideration of the above problems, the present invention aims to provide a passenger conveyor that prevents oil from leaking between the oil pan and the frame. [Means for solving the problem]

[0007] To solve the above problems and achieve the object, a passenger conveyor embodying one aspect of the present invention includes a frame, an endless driving chain that circulates within the frame, a plurality of steps that engage with the driving chain and circulate, and an oil pan attached to the lower part of the frame. The frame has a lower chord to which the oil pan is attached and a lateral reinforcement fixed to the lower chord. The oil pan has a base portion that covers the underside of the frame and upright portions that protrude approximately perpendicularly from both ends of the base portion in the width direction and are fixed to the side of the frame. The lateral reinforcement is located below the base portion of the oil pan. The base portion has weld holes for welding the lateral reinforcement to the lower chord. [Effects of the Invention]

[0008] According to the passenger conveyor having the above configuration, oil leakage from between the oil pan and the frame can be prevented. Problems, configurations, and effects other than those described above will become clear from the following description of the embodiments. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram showing an example of the configuration of a passenger conveyor according to a first embodiment. [Figure 2] 1 is a side view showing a part of a frame of a passenger conveyor according to a first embodiment. FIG. [Figure 3] FIG. 2 is a bottom view showing a part of the frame of the passenger conveyor according to the first embodiment. [Figure 4] FIG. 3 is a cross-sectional view taken along the line AA shown in FIG. [Figure 5] 3A and 3B are diagrams illustrating the welding and fixing of the lateral reinforcement and the frame according to the first embodiment. [Figure 6] FIG. 6 is an enlarged view of part A shown in FIG. 5. [Figure 7] FIG. 3 is a bottom view showing the overlapping of a plurality of oil pans according to the first embodiment. [Figure 8] FIG. 6 is a diagram illustrating an oil pan according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] 1. First embodiment A passenger conveyor according to a first embodiment will be described below with reference to Figures 1 to 7. Note that common members in each figure are given the same reference numerals.

[0011] [Passenger conveyor configuration example] First, the configuration of the passenger conveyor according to the first embodiment will be described with reference to FIG. FIG. 1 is a schematic diagram showing an example of the configuration of a passenger conveyor.

[0012] The passenger conveyor 1 shown in Fig. 1 is an inclined passenger conveyor installed on the upper and lower floors of a building structure. As shown in Fig. 1, the passenger conveyor 1 includes a frame 2 installed on the building structure, a control panel 3, a balustrade 4, a plurality of steps 5, handrails 6, and a drive mechanism 7. The passenger conveyor 1 also includes a transmission chain 8, a drive sprocket 9, a driven sprocket 10, and a driving chain 11.

[0013] The frame 2 is installed across the lower and upper floors. Hereinafter, the left-right direction when viewing the frame 2 from the lower floor will be referred to as the width direction of the frame 2. A drive mechanism 7, a control panel 3, and a drive sprocket 9 are arranged on the upper floor side of the frame 2. A driven sprocket 10 is arranged on the lower floor side of the frame 2. Furthermore, a plurality of oil pans 25 (see Figure 2) are attached to the bottom of the frame 2.

[0014] The drive mechanism 7 is composed of an electric motor and a reducer. Electric power is supplied to the electric motor from the control panel 3. The operation of the electric motor is controlled by the control panel 3. A belt member is wound around the drive pulley of the electric motor. This belt member is also wound around the driven pulley of the reducer. As a result, the rotational force of the electric motor is transmitted to the reducer via the belt member.

[0015] A transmission chain 8 is wound around the transmission sprocket of the reducer. The transmission chain 8 is wound around a drive sprocket 9. The driving force of the drive mechanism 7 is transmitted to the drive sprocket 9 via the transmission chain 8. This causes the drive sprocket 9 to rotate.

[0016] A driving chain 11 is wound around the driving sprocket 9 and the driven sprocket 10. When the driving sprocket 9 rotates, the driven sprocket 10 and the driving chain 11 rotate.

[0017] A guide member (not shown) is provided on the frame 2. The steps 5 are movably supported by the guide member (not shown). The steps 5 are connected endlessly via a driving chain 11. The steps 5 are guided by the guide member attached to the frame 2 and move cyclically between the outbound and inbound directions. Passengers are transported on the steps 5 moving on the outbound direction.

[0018] The balustrades 4 are arranged on both sides of the frame 2 in the width direction. The balustrades 4 are supported on the upper part of the frame 2. An endless handrail 6 is movably attached to the upper part of the balustrade 4. The handrail 6 is slidably engaged with the balustrade 4. The handrail 6 is driven by a handrail drive unit (not shown), and moves in the same direction as the multiple steps 5, circulating between the outbound and inbound sides in synchronization with the multiple steps 5. Passengers hold on to the handrail 6 moving on the outbound side.

[0019] [Frame and oil pan configuration example] Next, the configuration of the frame 2 and the oil pan 25 will be described with reference to FIGS. Fig. 2 is a side view showing a part of the frame 2. Fig. 3 is a bottom view showing a part of the frame 2. Fig. 4 is a cross-sectional view taken along the line AA shown in Fig. 2.

[0020] As shown in Figures 3 and 4, the frame 2 has a left frame portion 20A and a right frame portion 20B that face each other in the left-right direction with multiple steps 5 in between. The left frame portion 20A and the right frame portion 20B are formed symmetrically. The left frame portion 20A and the right frame portion 20B are composed of an upper chord member 21 and a lower chord member 22 that face each other in the vertical direction, and multiple vertical members 23 that connect these upper chord member 21 and lower chord member 22. The upper chord member 21, the lower chord member 22, and the multiple vertical members 23 are formed, for example, from steel material having appropriate strength.

[0021] One end of the upper chord 21 and the lower chord 22 is disposed on the lower floor, and the other end of the upper chord 21 and the lower chord 22 is disposed on the upper floor. In other words, the upper chord 21 and the lower chord 22 extend in the direction of movement of the multiple steps 5. The multiple vertical members 23 are disposed at appropriate intervals in the direction in which the upper chord 21 and the lower chord 22 extend (the longitudinal direction of the frame 2). Both ends of the vertical members 23 are firmly fixed to the upper chord 21 and the lower chord 22 by a fixing method such as welding.

[0022] As shown in Figure 2, the frame 2 has multiple lateral reinforcements 24. The multiple lateral reinforcements 24 have a generally L-shaped side view when viewed from the width direction of the frame 2, and extend in the width direction of the frame 2. The multiple lateral reinforcements 24 are arranged at appropriate intervals in the direction in which the lower chord 22 extends (the longitudinal direction of the frame 2). Both ends of the lateral reinforcements 24 in the width direction of the frame 2 are firmly fixed by welding to the lower chords 22 of the left frame section 20A and the right frame section 20B.

[0023] The multiple oil pans 25 are fixed to the lower chord member 22. The longitudinal ends of the multiple oil pans 25 overlap each other. The ends of the multiple oil pans 25 on the upper floor side are located below the overlapping ends on the lower floor side.

[0024] The oil pan 25 is formed by bending a metal plate, and has a base portion 251 and a rising portion 252. The base portion 251 is formed in the shape of a rectangular flat plate. The base portion 251 covers the lower surface of the frame 2. The rising portion 252 protrudes approximately perpendicularly from both ends of the base portion 251 in the width direction of the frame 2. The rising portion 252 is formed in the shape of a flat plate having a plane that is approximately perpendicular to the width direction of the frame 2.

[0025] The rising portion 252 faces the side surface of the lower chord member 22 (the side surface of the frame 2). The rising portion 252 is fixed to the side surface of the lower chord member 22 by welding. The oil pan 25 covers the underside and side surface of the frame 2, thereby preventing oil from leaking between the oil pan 25 and the frame 2 (lower chord member 22).

[0026] The welding point between the rising portion 252 and the lower chord member 22 is on the outside of the frame 2. Therefore, oil does not get in between the rising portion 252 and the lower chord member 22. Therefore, there is no need to fill the entire space between the rising portion 252 and the lower chord member 22 with welding. In other words, in this embodiment, there is no need to weld continuously between the rising portion 252 and the lower chord member 22 in the longitudinal direction of the frame.

[0027] In this embodiment, the welding points between the rising portion 252 and the lower chord member 22 are aligned at appropriate intervals in the longitudinal direction of the frame 2. This prevents the installation work of the oil pan 25 from becoming complicated, and also reduces the amount of welding required for the installation work of the oil pan 25. Note that the method of fixing the oil pan according to the present invention is not limited to welding, and it is also possible to use fastening with screws, crimping, or the like.

[0028] The multiple lateral reinforcements 24 are located below the oil pan 25. That is, both ends of the lateral reinforcements 24 in the width direction of the frame 2 face the bottom surface of the lower chord member 22 via the base portion 251 of the oil pan 25. As shown in FIG. 3 , the base portion 251 of the oil pan 25 has 253.

[0029] The welding holes 253 are formed at positions overlapping with the bottom surface of the lower chord member 22. The welding holes 253 are located on both sides of the lateral reinforcement 24 in the longitudinal direction of the frame 2. This makes it easy to position the lateral reinforcement 24. The welding holes 253 are oblong rectangular holes that are long in the width direction of the frame 2. The welding holes 253 expose part of the bottom surface of the lower chord member 22.

[0030] [Lateral reinforcement and frame welding] Next, the welding and fixing of the horizontal reinforcement 24 to the lower chord 22 of the frame 2 will be described with reference to FIGS. 5 is a diagram illustrating the welding and fixing of the horizontal reinforcement 24 to the frame 2. FIG. 6 is an enlarged view of part A shown in FIG.

[0031] 5 and 6, the lateral reinforcement 24 is fixed to the lower chord 22 with its corners facing downward. The lateral reinforcement 24 is directly fixed to the lower chord 22 by welding through weld holes 253. This ensures the rigidity of the frame 2.

[0032] Furthermore, the lateral reinforcement 24 is located below the oil pan 25. This prevents the lateral reinforcement 24 from blocking the oil flowing inside the oil pan 25 or rainwater that has entered the frame 2. Furthermore, since the lateral reinforcement 24 does not get in the way when cleaning the oil pan 25, the oil pan 25 can be easily cleaned.

[0033] In the direction in which the lateral reinforcement 24 and the lower chord member 22 face each other, the weld holes 253 are positioned so as not to overlap with the lateral reinforcement 24. In other words, the distance between the weld holes 253 located on both sides of the lateral reinforcement 24 is longer than the width of the lateral reinforcement 24 (the distance along the longitudinal direction of the frame 2). For example, it is advisable to set the distance between the weld holes 253 located on both sides of the lateral reinforcement 24 to be 5 to 10 mm longer than the width of the lateral reinforcement 24.

[0034] 6, weld hole 253 is filled with weld metal 27. This prevents oil from leaking from weld hole 253 to the outside of oil pan 25. Furthermore, because weld hole 253 does not overlap with lateral reinforcement 24, it is possible to prevent poor welding in which there are portions of weld hole 253 that are not filled with weld metal 27. As a result, oil can be prevented from leaking from weld hole 253.

[0035] The welding hole 253 faces the lower chord member 22. The length of the welding hole 253 in the width direction of the frame 2 is shorter than the length of the lower chord member 22 in the width direction of the frame 2. This makes it possible to easily fill the welding hole 253 with weld metal.

[0036] [Multiple oil pans overlapping] Next, the overlapping of a plurality of oil pans 25 will be described with reference to FIG. FIG. 7 is a bottom view showing the overlapping of a plurality of oil pans 25. As shown in FIG.

[0037] 7, among the multiple oil pans 25, oil pans 25A and 25B are adjacent to each other in the longitudinal direction of frame 2. Oil pan 25A is located closer to the lower floor than oil pan 25B. The end of oil pan 25A on the upper floor side overlaps the end of oil pan 25B on the lower floor side.

[0038] The upper floor side end of oil pan 25A is located outside the lower floor side end of oil pan 25B. Therefore, the upper floor side end of oil pan 25A is set to be about twice the plate thickness wider than the lower floor side end of oil pan 25A. However, with a difference in width of about twice the plate thickness, it is difficult for an operator to distinguish the wider end in the longitudinal direction of frame 2.

[0039] Therefore, the shape (size) of the welded holes 253 in this embodiment allows the upper floor side end of the oil pan 25A to be recognized. As shown in FIG. 7, among the multiple welded holes 253 formed in the base portion 251 of the oil pan 25A, the welded hole 253a closest to the upper floor side end is set smaller than the welded holes 253 located further down the floor. This allows the worker to easily recognize the upper floor side end of the oil pan 25A. As a result, the workability of the installation work of the oil pan 25A can be improved.

[0040] Furthermore, for example, the welding holes formed in the base of the oil pan closest to the end of the upper floor may be arranged at appropriate intervals across the width of the frame, allowing the worker to easily identify the end of the oil pan facing the upper floor.

[0041] Furthermore, the weld holes according to the present invention may be formed in a position that allows the upper floor end of the oil pan to be identified. For example, four weld holes formed on both sides of the horizontal reinforcement in the longitudinal direction of the frame form one set, and multiple sets of weld holes are arranged asymmetrically on the base portion. Specifically, the distance from the weld hole closest to the upper floor end of the multiple weld holes formed on the base portion of the oil pan to the upper floor end is made shorter than the distance from the weld hole closest to the lower floor end to the lower floor end. This allows the worker to easily identify the upper floor end of the oil pan.

[0042] 2. Second embodiment Next, a passenger conveyor according to a second embodiment will be described with reference to Fig. 8. In Fig. 8, the same components as those in the second embodiment are denoted by the same reference numerals.

[0043] The passenger conveyor according to the second embodiment differs from the passenger conveyor 1 of the first embodiment in the oil pan 35. Therefore, here, only the oil pan 35 will be described, and a description of the configuration overlapping with the first embodiment will be omitted.

[0044] A plurality of oil pans 35 are attached to the lower part of the frame 2 (see FIG. 1) of the passenger conveyor according to the second embodiment. The plurality of oil pans 35 are fixed to the lower chord member 22 (see FIG. 4). The longitudinal ends of the plurality of oil pans 35 of the frame 2 overlap each other.

[0045] The oil pan 35 is formed by bending a metal plate, and has a base portion 351 and a rising portion 352. The base portion 351 is formed in the shape of a rectangular flat plate. The base portion 351 covers the lower surface of the frame 2. The rising portion 352 protrudes approximately perpendicularly from both ends of the base portion 351 in the width direction of the frame 2. The rising portion 352 is formed in the shape of a flat plate having a plane approximately perpendicular to the width direction of the frame 2.

[0046] The rising portion 352 faces the side surface of the lower chord member 22 (the side surface of the frame 2). The rising portion 352 is fixed to the side surface of the lower chord member 22 by welding. The oil pan 35 covers the underside and side surface of the frame 2, thereby preventing oil from leaking between the oil pan 35 and the frame 2 (lower chord member 22).

[0047] Weld holes (not shown) are formed in the base portion 351. The weld holes are formed on both sides of the horizontal reinforcement 24 (see FIG. 3) in the longitudinal direction of the frame 2. This makes it easy to position the horizontal reinforcement 24. The horizontal reinforcement 24 is directly fixed to the lower chord member 22 by welding through the weld holes. This ensures the rigidity of the frame 2.

[0048] 8, among the multiple oil pans 35, oil pans 35A and 35B are adjacent to each other in the longitudinal direction of frame 2. Oil pan 35A is located closer to the lower floor than oil pan 35B. The end of oil pan 35A on the upper floor side overlaps the end of oil pan 35B on the lower floor side.

[0049] The upper floor side end of oil pan 35A is located outside the lower floor side end of oil pan 35B. Therefore, the upper floor side end of oil pan 35A is set to be about twice the plate thickness wider than the lower floor side end of oil pan 35A.

[0050] A notch 352a is formed at the end of the rising portion 352 of the oil pan 35 on the lower floor side. Fig. 8 shows the notch 352a of the oil pan 35B. The notch 352a corresponds to the recognition portion of the present invention.

[0051] Cutout 352a is formed by cutting out a diagonal corner of rising portion 352. Cutout 352a of oil pan 35B overlaps with the upper floor side end of oil pan 35A. As a result, cutout 352a is covered by the upper floor side end of oil pan 35A and cannot be seen from the outside.

[0052] By forming the cutout 352a in the rising portion 352, the worker can easily recognize the end of the oil pan 35 on the lower floor side. As a result, the workability of installing the oil pan 35 can be improved. The cutout may also be formed in the end of the rising portion 352 of the oil pan 35 on the upper floor side. In this case, the player can easily recognize the end of the oil pan 35 on the upper floor side.

[0053] Furthermore, the notch formed in the rising portion is not limited to a diagonal notch at the corner, and may be, for example, a circular arc notch at the corner of the rising portion.

[0054] The recognition portion for identifying the upper floor side or lower floor side end of the oil pan may be, for example, a through hole provided in the rising portion. When the recognition portion is a notch or a through hole, the recognition portion can be easily formed.

[0055] The recognition portion may also be a bent portion formed by bending the upper floor side end of the rising portion outward. In this case, the lower floor side end of the rising portion of an adjacent oil pan cannot be placed on the outside of the upper floor side end of the rising portion. This prevents the adjacent oil pans from being placed on top of each other incorrectly.

[0056] The passenger conveyor of the present invention has been described above, including its functions and effects. However, the passenger conveyor of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention as set forth in the claims.

[0057] In the above-described embodiment, the horizontal reinforcement 24 used has a substantially L-shaped side surface when viewed from the width direction of the frame 2. However, the horizontal reinforcement according to the present invention is not limited to a substantially L-shaped side surface when viewed from the width direction of the frame, and various shapes such as a U-shape, Z-shape, or hat-shape can be used when viewed from the width direction of the frame.

[0058] In the first embodiment described above, the welded hole 253a is configured to identify the end of the oil pan 25 on the upper floor side (one end side). However, the welded hole according to the present invention may be configured or positioned to identify the end of the oil pan on the lower floor side (the other end side).

[0059] In the second embodiment, the notch 352a (recognition portion) is configured to recognize the end portion of the oil pan 35 on the lower floor side (the other end side). However, the recognition portion according to the present invention may be configured to recognize the end portion of the oil pan on the upper floor side (one end side).

[0060] In the above-described embodiment, an escalator with steps having differences in level between them has been described as an example of an inclined passenger conveyor. However, the passenger conveyor according to the present invention can also be applied to a motorized roadway with multiple steps without differences in level between them, a so-called moving walkway.

[0061] The passenger conveyor according to the present invention can also be applied to a passenger conveyor having a frame in which at least a portion of the inclined section is provided with a portion parallel to the upper horizontal section and the lower horizontal section.Furthermore, the passenger conveyor according to the present invention can also be applied to a passenger conveyor having a frame in which the extending direction of the upper horizontal section and the lower horizontal section differs due to the extending direction of the inclined section being curved and changed.

[0062] Furthermore, the above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those including all of the configurations described. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace part of the configuration of each embodiment with another configuration.

[0063] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but also include "parallel" and "orthogonal" and may also mean a "substantially parallel" or "substantially orthogonal" state within a range in which the functions can be exerted. [Explanation of symbols]

[0064] REFERENCE SIGNS LIST 1... passenger conveyor, 2... frame, 3... control panel, 4... parapet, 6... handrail, 7... drive mechanism, 8... transmission chain, 9... drive sprocket, 10... driven sprocket, 11... driving chain, 20A... left frame section, 20B... right frame section, 21... upper chord, 22... lower chord, 23... vertical member, 24... horizontal reinforcement, 25, 25A, 25B, 35, 35A, 35B... oil pan, 27... welded metal, 100... speed abnormality detection device, 251, 351... base section, 252, 352... rising section, 253, 253a... welded hole, 352a... notch (recognition section)

Claims

1. A passenger conveyor comprising: a frame installed in a building; an endless driving chain that moves circulatingly within the frame; a plurality of steps that engage with the driving chain and move circulatingly; and an oil pan attached to a lower portion of the frame, The frame has a lower chord to which the oil pan is attached and a lateral reinforcement fixed to the lower chord, The oil pan is a base portion covering the lower surface of the frame; and rising portions that protrude substantially perpendicularly from both ends of the base portion in the width direction and are fixed to the side surfaces of the frame, the lateral reinforcement is located below the base portion of the oil pan, The base portion has welding holes for welding the transverse reinforcement and the lower chord member. Passenger conveyor.

2. In a direction in which the lateral reinforcement and the lower chord member face each other across the base portion, the weld holes are formed at positions that do not overlap with the lateral reinforcement.

2. A passenger conveyor according to claim 1.

3. The welding holes are formed on both sides of the transverse reinforcement in the frame longitudinal direction, which is the direction along the forward and backward paths of the plurality of steps.

2. A passenger conveyor according to claim 1.

4. The oil pan is a plurality of The plurality of oil pans are arranged in a frame longitudinal direction, which is a direction along the forward and backward paths of the plurality of steps, and are arranged so that ends of the plurality of oil pans in the frame longitudinal direction overlap each other, The welding holes are formed in a shape or at a position that allows identification of one end or the other end of each oil pan in the longitudinal direction of the frame.

2. A passenger conveyor according to claim 1.

5. The oil pan is a plurality of The plurality of oil pans are arranged in a frame longitudinal direction, which is a direction along the forward and backward paths of the plurality of steps, and are arranged so that ends of the plurality of oil pans in the frame longitudinal direction overlap each other, The rising portion has a recognition portion for recognizing one end side or the other end side of each oil pan in the longitudinal direction of the frame.

2. A passenger conveyor according to claim 1.

6. The recognition portion is a notch formed in the rising portion.

6. A passenger conveyor according to claim 5.

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