JP4982063B2 - Passenger conveyor - Google Patents

Description

  The present invention relates to a passenger conveyor such as an escalator or an electric road, and more particularly to a passenger conveyor suitable for being installed in a narrow place.

  Conventionally, in order to reduce the width of a passenger conveyor, a motor is installed around a drive shaft that drives a step and the drive shaft is directly driven (for example, Patent Document 1 below), or between steps of a step. A configuration for directly driving the drive chain (for example, Patent Document 2 below) has already been proposed.

JP-A-56-108683 Japanese Patent Laid-Open No. 55-40185

  The prior art has an advantage that the width dimension can be reduced by driving the steps and step chains directly with an electric motor, so that an extra drive chain and drive sprocket for power transmission can be omitted.

  However, the above configuration is arranged between the reciprocating passages of the steps where the driving machine devices such as the electric motor and the speed reduction mechanism are connected endlessly, i.e., inside the step movement trajectory. Prior to installation, the drive machinery must be installed, and during maintenance inspections, the work must be performed after removing the steps from the chain, and the work must be done in a narrow area. Was spending.

  An object of the present invention is to provide a passenger conveyor that can be easily assembled and maintained and inspected for a drive machine and that can be reduced in width.

In order to achieve the above object, the present invention provides an endless step chain or step plate chain that is driven by connecting a plurality of steps or step plates, and a pair of the step chain or the step plate chain that is wound near the landing floor of both entrances and exits. Main sprocket and sub sprocket, a drive sprocket provided on a drive shaft in which the pair of main sprockets are fixed at both ends, a drive mechanical device for transmitting rotational force to the drive sprocket, and a pair of left and right supporting these In a passenger conveyor provided with a main frame having a side frame, the step or the tread has a front wheel shaft that is connected to a step chain or a tread plate chain that is wound around the main sprocket and pivotally supports a front wheel at the end, On one end side of the drive shaft, the main sprocket and the drive sprocket positioned closer to the end side of the drive shaft than the main sprocket The front wheel is positioned in between, the drive shaft is rotatably held by bearings fixed at both ends to the side frame, the bearing is positioned within the width of the side frame, and the teeth of the drive sprocket The entire part is positioned within the width dimension of the bearing and within the width dimension of the side frame .

  ADVANTAGE OF THE INVENTION According to this invention, the passenger conveyor which can assemble a drive machine apparatus easily, and a maintenance inspection work and can reduce a width dimension can be obtained.

  Hereinafter, a first embodiment of the present invention will be described based on an escalator shown in FIGS. In general, the escalator 1 is configured based on a main frame 4 installed across an upper floor 2 and a lower floor 3 of a building. As shown in FIG. 1, the main frame 4 is composed of a pair of left and right side frames 5A and 5B, and a bottom plate 6 and a cross beam (not shown) connecting the left and right side frames 5A and 5B. The frames 5A and 5B are composed of an upper chord member 7 extending in the longitudinal direction of the escalator, a lower chord member 8, and a vertical member 9 connecting the upper chord member 7 and the lower chord member 8.

An upper horizontal portion 10 serving as an upper machine room is formed on the upper floor 2 side of the main frame 4 having the above configuration, and a lower horizontal portion 11 serving as a lower machine room is formed on the lower floor 3 side. The lower horizontal part 11 is connected by an inclined part 12. In general, the upper part of the upper horizontal part 10 and the upper part of the lower horizontal part 11 are respectively closed by boarding / exiting floors for passengers to get on and off.

  A pair of main sprockets 13 and sub sprockets 14 are pivotally supported on the upper horizontal portion 10 and the lower horizontal portion 11 of the main frame 4 thus configured. The pair of main sprockets 13 are fixed to a drive shaft 15, and the drive shaft 15 is rotatably held at its ends by a bearing 16. The bearing 16 is fixed to the vertical member 9 of the side frames 5A and 5B, and its vertical projection is within the width h of the side frames 5A and 5B.

  An endless step chain 17 is wound around the main sprocket 13 and the sub sprocket 14, and a front wheel shaft 19 that is fixed to the step 18 and pivotally supports the front wheel is connected to the step chain 17. A number of steps 18 are formed endlessly.

Further, a balustrade 20 is erected on each of the side frames 5A and 5B, and a moving handrail 21 is guided to the periphery of the balustrade 20. The moving handrail 21 is driven by a handrail driving device 22 installed inside the balustrade 20. The handrail drive device 22 uses a handrail drive chain 24 wound around a handrail drive sprocket 23 attached to the main sprocket 13 of the drive shaft 15 through a turning roller 25 as power. Here, the handrail drive sprocket 23 has a smaller diameter than the radius at which the front wheel moves around the drive shaft 15 so that the vertical projection overlaps the front wheel of the step 18.

  On the other hand, a drive sprocket 26 is fixed to one end side of the drive shaft 15 on the side opposite to the step 18 of the handrail drive sprocket 23. The drive sprocket 26 is formed in a dish shape, the side fixed to the drive shaft 15 is on the side opposite the step 18 from the handrail drive sprocket 23, and the tooth portion formed on the outer periphery is the side frame of the main frame 4. The vertical projection overlaps the side frame 5B so as to face the width h of 5B. For this reason, the three vertical projections of the tooth portion of the drive sprocket 26, the bearing 16, and the side frame 5B of the main frame 4 overlap each other and are located within the width h of the side frame 5B.

  A power transmission chain 27 is wound around the tooth portion of the drive sprocket 26, and this power transmission chain 27 is wound around a sprocket 29 of a drive machine device 28 installed outside the reciprocating passage of the step 18. Yes. The drive machine device 28 includes an electric motor 30, a speed reducer 31, a brake 32, and the like, but the speed reducer 31 is not necessarily required.

Since it is configured as described above, the space required by the tooth portion of the drive sprocket 26 being originally located between the bearing 16 and the handrail drive sprocket 23 and the installation balance of the main frame 4 and the balustrade 20 are taken into consideration. As a result, the equivalent space required on the counter-drive sprocket 26 side can be made unnecessary. As a result, the overall width Wf of the main frame 4 can be reduced, and the installation width dimension Wo of the escalator 1 can be reduced. it can. In addition, the axial length of the drive shaft 15 can be shortened by overlapping the vertical projection of the front wheel of the step 18 with the handrail drive sprocket 23.

  When the escalator 1 having a narrow width as described above is installed in a narrow area of a building, for example, an existing staircase of a station building, usually, as shown in FIG. 2 and FIG. The escalator 1 is installed and the balustrade 20 on the opposite wall 41 side of the escalator 1 is used as a partition wall between the stairs 40 and the escalator 1. Thus, when the escalator 1 having the installation width dimension Wo is installed on the stairs 40 having the full width Ws, the width dimension used by the pedestrian of the stairs 40 becomes Wu, but the installation width dimension Wo of the escalator 1 is reduced. Since the width is narrow as described above, the reduction in the use width dimension Wu of the stairs 40 can be minimized.

  By the way, in the first embodiment, the assembly and maintenance inspection work of the drive machine device 28 of the escalator 1 is performed outside the longitudinal direction of the escalator with respect to the movement trajectory of the step 18 and the step chain 17 by the drive machine device 28. Since it is installed in the upper horizontal part 10 which becomes the upper machine room, it can be easily carried out by removing the getting-on / off floor blocking the upper part and opening the upper horizontal part 10 as in the prior art.

  As described above, since the drive machine device 28 is installed on the outer side in the longitudinal direction of the movement path of the step 18, the assembly of the drive machine device 28 and maintenance / inspection work are performed on the step 18 connected endlessly. Since the above operation can be performed without being influenced, it becomes easy.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the embodiment shown in FIG. 6, the drive sprocket 42 has a disc shape instead of a dish shape, and the entire drive sprocket 42 is located within the width h of the side frame 5 </ b> B constituting the main frame 4. Different from the first embodiment. However, the vertical projections of the teeth of the drive sprocket 42, the bearing 16, and the side frame 5B of the main frame 4 overlap each other, the width of the main frame can be reduced, and the installation of the drive machine device. This is the same as the first embodiment.

  According to this embodiment, since the drive sprocket 42 is not dish-shaped, it is superior to the above embodiment in that it is easy to form.

  FIG. 7 shows a third embodiment, and the installation position of the bearing that supports the drive shaft 15 is different between the present embodiment and the first and second embodiments. That is, in the present embodiment, the bearing 44 is positioned between the forward path and the return path of the step 18, and is supported by the vertical members 9 of the side frames 5A (not shown) and 5B via a bracket (not shown), The main sprocket 45, the handrail drive sprocket 46, and the drive sprocket 47 are fixed to the end of the drive shaft 15, and the arrangement thereof is the main sprocket on the step 18 side as in the first and second embodiments. 45, a handrail drive sprocket 46 is disposed on the side opposite to the step 18 of the main sprocket 45, and a drive sprocket 47 is disposed on the outermost side.

  Further, by displacing the bearing 44 closer to the intermediate portion of the drive shaft 15 than the tooth portion of the drive sprocket 47, the drive sprocket 47 can be positioned at the end of the drive shaft 15. As a result, the drive sprocket 47 is The pair of left and right side frames 5A and 5B constituting the frame 4 can be installed so that the vertical projection overlaps, and the length of the drive shaft 15 can be shortened accordingly.

  The outermost drive sprocket 47 is the same as that of the second embodiment in that it has a disk shape, is located within the width h of the side frame 5B, and has a function and effect.

  In addition, although the above each embodiment demonstrated the escalator as a passenger conveyor, it is applicable not only to an escalator but the electric road which a level | step difference does not produce between treads. In this case, it is necessary to replace the step in each claim with a tread. Furthermore, although the existing staircase of the station building has been described as an example of a narrow area, it is not limited to the existing staircase for the station building, and can be used as a space-saving passenger conveyor in general buildings and flat passages.

The longitudinal cross-sectional view which follows the II line | wire of FIG. 2 of the escalator which shows 1st Embodiment by this invention. The schematic side view which shows the installation state to the staircase of the escalator which shows 1st Embodiment by this invention. The top view which shows the upper floor vicinity of the escalator of FIG. The side view which shows the upper floor vicinity inside of the escalator of FIG. The top view of FIG. The equivalent figure of FIG. 1 of the escalator which shows 2nd Embodiment by this invention. The equivalent figure of FIG. 1 of the escalator which shows 3rd Embodiment by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Escalator, 4 ... Main frame, 5A, 5B ... Side frame, 13, 45 ... Main sprocket,
DESCRIPTION OF SYMBOLS 15 ... Drive shaft, 16, 44 ... Bearing, 17 ... Step chain, 18 ... Step, 23, 46 ... Handrail drive sprocket, 26, 42, 47 ... Drive sprocket, 28 ... Drive machine apparatus.

Claims (4)

An endless step chain or step plate chain that is driven by connecting a plurality of steps or step plates, a pair of main sprockets and sub sprockets that wrap the step chains or step plate chains near the landing floor of both entrances and exits, and the pair of pairs Passenger conveyor provided with a drive sprocket provided on a drive shaft having a main sprocket fixed at both ends, a drive mechanical device for transmitting rotational force to the drive sprocket, and a main frame having a pair of left and right side frames In
The step or the tread has a front wheel shaft that is coupled to a step chain or a tread plate chain wound around the main sprocket and pivotally supports a front wheel at an end portion.
On the one end side of the drive shaft, the front wheel is positioned between the main sprocket and the drive sprocket located closer to the end portion of the drive shaft than the main sprocket,
The drive shaft is rotatably held by bearings fixed at both ends to the side frame, the bearing is positioned within the width dimension of the side frame, and the entire toothed portion of the drive sprocket is placed in the width of the bearing. A passenger conveyor characterized in that it is positioned within the dimensions and within the width dimension of the side frame . An endless step chain or step plate chain that is driven by connecting a plurality of steps or step plates, a pair of main sprockets and sub sprockets that wrap the step chains or step plate chains near the landing floor of both entrances and exits, and the pair of pairs A drive sprocket provided on the drive shaft with the main sprocket fixed at both ends, a drive mechanical device that transmits rotational force to the drive sprocket and is installed on the outer side in the longitudinal direction from the movement trajectory of the step, and supports the left and right In a passenger conveyor with a main frame having a pair of side frames,
The step or the tread has a front wheel shaft that is coupled to a step chain or a tread plate chain wound around the main sprocket and pivotally supports a front wheel at an end portion.
On the one end side of the drive shaft, the front wheel is positioned between the main sprocket and the drive sprocket located closer to the end portion of the drive shaft than the main sprocket,
Both ends of the drive shaft are rotatably held by bearings fixed to the side frame, and the vertical projection of the bearing is positioned within the width dimension of the side frame, so that the vertical projection of the entire tooth portion of the drive sprocket is obtained. The passenger conveyor is positioned within the width dimension of the bearing and within the width dimension of the side frame .   In any one of Claim 1 or 2, the said main sprocket, a handrail drive sprocket, and a drive sprocket are being fixed to the above-mentioned drive shaft, and the above-mentioned handrail drive sprocket is located in the counter-step side or counter-step board side of the main sprocket, The passenger conveyor is characterized in that the drive sprocket is located on the counter-step side or the counter-tread plate side with respect to the handrail drive sprocket.   4. The passenger conveyor according to claim 1, wherein vertical projections of the handrail drive sprocket and the front wheel are superimposed.

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