EP0749932A2 - Dual-purpose escalator for wheelchair - Google Patents
Dual-purpose escalator for wheelchair Download PDFInfo
- Publication number
- EP0749932A2 EP0749932A2 EP96115207A EP96115207A EP0749932A2 EP 0749932 A2 EP0749932 A2 EP 0749932A2 EP 96115207 A EP96115207 A EP 96115207A EP 96115207 A EP96115207 A EP 96115207A EP 0749932 A2 EP0749932 A2 EP 0749932A2
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- EP
- European Patent Office
- Prior art keywords
- steps
- specialized
- wheelchair
- escalator
- operation mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B23/00—Component parts of escalators or moving walkways
- B66B23/08—Carrying surfaces
- B66B23/12—Steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B31/00—Accessories for escalators, or moving walkways, e.g. for sterilising or cleaning
- B66B31/006—Accessories for escalators, or moving walkways, e.g. for sterilising or cleaning for conveying hand carts, e.g. shopping carts
Definitions
- This invention relates to an escalator, and more particularly to a dual-purpose escalator for wheelchairs which is capable of transporting wheelchairs for physically handicapped persons as well as ordinary users.
- FIG. 15 is a main-frame (generally called a "truss") positioned at a slope between a landing 2 and a landing 3 on lower and upper floors.
- 4 is a wheelchair in which a physically handicapped person is seated and 5 is an attendant.
- 6 is an attendant call button provided close to landing 2.
- 7 are shift switches for the wheelchair loading operation mode provided in balustrade 1a of the escalator. 8 are also wheelchair operation buttons.
- Figure 15 are the multiple steps which are arranged and run in an endless form on a path constructed in main-frame 1 using guiderails and the like.
- the design is that the treads of several steps 9 become of the same height as each other on the horizontal path sections at the lower and upper floors, and that the treads of each step 9 form stairs with levels differing from each other to run in the sloping section between.
- steps 9 10 is a first specialized step
- 11 is a second specialized step
- 12 is a third specialized step. These steps are used for wheelchair loading.
- 13 is an activating apparatus which causes specialized steps 10, 11 and 12 to alter their configurations to a first state in which a wheelchair can be loaded when in the wheelchair operation mode, or to be restored to a second state for the normal operation mode.
- first specialized step 10 is firstly activated by activating apparatus 13 and part of step 9 is caused to tilt. Then, second specialized step 11 is activated by activating apparatus 13, and a linking system 22 provided inside it is engaged with third specialized step 12. Third specialized step 12, which is linked by linking system 22, is supported by second specialized step 11 on the inclined part of escalator, so that a level space for loading wheelchairs of just 2 steps is ensured.
- activating apparatus 13 is provided on main-frame 1 which is the running path for steps 9 to 12, and has rack 13b as an engagement member capable of up and down movement through elevator mechanism 13a.
- first to third specialized steps 10, 11 and 12 are provided with pinions 14a, 14b and 14c, respectively, which are toothed rotors for operating power input which rotate by engaging with rack 13b and are mounted on each of their inner lower sides.
- pinions 14a, 14b and 14c are toothed rotors for operating power input which rotate by engaging with rack 13b and are mounted on each of their inner lower sides.
- drivers 15a, 15b and 15c which drive mechanisms inside the steps linked with pinions 14a, 14b and 14c, respectively.
- the design is that, during normal operation mode running, these pinions 14a, 14b and 14c do not engage with rack 13b, which is withdrawn to the lower position of activating apparatus 13 as shown in Figure 16.
- the pinions 14a, 14b and 14c rotate by engaging with rack 13b, which is raised by elevator mechanism 13a of activating apparatus 13 as shown in Figure 17, while running in the horizontal path sections at the lower or upper floor.
- drivers 15a, 15b and 15c are operated in linked motion with pinions 14a, 14b and 14c, respectively.
- specialized step 10 is provided with a tilting step section 16 capable of tilting partically and a surrounding fixed step section 17.
- a bolt 18a projects from driver 15a mounted on tilting step section 16 and engages with a retainer 19a of fixed step section 17.
- tilting step section 16 and fixed step section 17 are incorporated as one horizontal surface.
- drive 15a withdraws bolt 18a by the rotation of pinion 14a which engages with rack 13b of activating apparatus 13 as described above, and disengages it from retainer 19a as shown in Figure 17.
- tilting step section 16 changes its configuration to a tilted state about a tilting rotation shaft 20, as shown in Figure 18.
- Second specialized step 11 is provided with linking system 22 so that it links with and supports the tread of third specialized step 12 to form a deep tread of 2 step's depth when running on the sloping section.
- This linking system 22 links with and supports, or releases the link with, a movable step section 23 of third specialized step 12 by thrusting forward or withdrawing a rack-toothed coupling rod (fork) 22a in linked motion via a gear 21 with the forward or reverse rotation of driver 15b.
- Third specialized step 12 is provided with a movable step section 23 which is supported by linking system 22 of second specialized step 11, and a fixed step section 24 which guides and supports movable step section 23 so as to rise and fall via link 25 of a pantagraph.
- a bolt 18c is projected by driver 15c mounted on fixed step section 24 and is engaged with a retainer 19c of movable step section 23.
- movable step section 23 and fixed step section 24 are incorporated as one.
- driver 15c withdraws bolt 18c and disengages it from retainer 19c by the rotation of pinion 14c which engages with rack 13b of activating apparatus 13.
- movable step section 23 is linked with and supported by coupling rod (fork) 22a of linking system 22 which thrusts forward from second specialized step 11.
- the design is that, as shown in Figure 18, movable step section 23 follows, even on the sloping section, at the same height as that of second specialized step 11 by means of the upward movement of link 25.
- wheel-stops 36 are provided in third specialized step 12 to prevent the falling of a wheelchair during the loading of wheel-chair 4. These wheel-stops 36 are projected from and retracted into the tread by driver 15c.
- Figures 19 and 20 are drawings showing external appearances of first to third specialized steps 10, 11 and 12.
- Figure 19 shows the running state on the sloping section in the normal operation mode
- Figure 20 shows the running state on the sloping section in the wheelchair loading operation mode.
- elevator mechanism 13a of activating apparatus 13 operates and raises rack 13b, which is the engagement member, while running (in the horizontal path sections at the lower and upper floors).
- Pinions 14a, 14b and 14c which are the toothed rotors for inputting the operating forces for first to third specialized steps 10, 11 and 12 which come running in succession, successively engage with rack 13b and rotate.
- Specialized steps 10, 11 and 12 operate through drivers 15a, 15b and 15c which are linked to the pinions 14a, 14b and 14c, respectively, and change their configuration to enable wheelchair loading.
- the problem in the step construction mentioned above, which is the focal point of this invention, is the wheel-stop mechanism provided in the third specialized step.
- wheel-stops which are mechanically projected. In their methods the wheel-stops are projected to specified heights or retracted to their original positions when driving forces are applied by wheel-stop mechanisms.
- wheel-stop mechanisms have the following problems. That is to say, the case of a wheelchair or the like loaded directly above the wheel-stop mechanism for some reason or other can be considered. In such a case, with the wheel-stop mechanisms mentioned above, the following states may happen. That is, the wheel-stops may push the wheelchair upwards, or they may become in an overloaded state in which they cannot move because of the weight of the wheelchair, or the wheel-stop mechanism may be damaged. None of these states is acceptable.
- this invention seeks to provide a dual-purpose escalator for wheelchairs which is designed to enable increased efficiency in the determination of the cause and in the work of investigation and inspection when an operational failure of the dual-purpose escalator occurs.
- a dual-purpose escalator for a wheelchair comprising:
- the operation of the coupling rods can be checked during wheelchair operation through the inspection ports provided in the tread of the specialized step which has the coupling rods. During maintenance inspections, whether or not there is smooth thrusting forward and retraction of the coupling rods can be checked.
- Toothed rotors 30 are provided instead of pinions 14a, 14b and 14c and engagement member 31 is provided instead of rack 13b.
- the overall construction of the escalator apart from these is the same as in Figures 15 to 20 and has been omitted.
- engagement member 31 has a pin-rack structure composed of an oblong base 32 with a U-shaped cross-section and multiple pins 33 which are arranged parallel to each other with a specific pitch in the channel of base 32.
- Each of pins 33 is a roller pin. Pins 33 are all mounted so that they are free to rotate.
- a sprocket is used as toothed rotor 30 in place of the pinions 14a, 14b and 14c in prior art.
- pin 33a which is the first to engage with toothed rotor (sprocket) 30 is supported by base 32 via a spring member 34, such as a plate spring, so that it is capable of displacement (escape) in a direction away from toothed rotor 30.
- Figure 3 shows a further arrangement.
- toothed rotor (sprocket) 30 is guided and supported at the position of first contact with engagement member 31 so as to be capable of escape movement away from engagement member 31. That is to say, both toothed rotor (sprocket) 30 and a guide roller 35 are kept at a constant spacing A from each other on the vertical axis via a connecting member (not illustrated).
- the sprocket is mounted inside the specialized step so that it is capable of moving with a specified stroke in the transverse direction (the direction orthogonal to the forward direction).
- recessed, surfaces 32b with slopes are formed at the front ans rear ends of the back surface 32a of base 32 of engagement member 31, which is the pin-rack.
- first roller pin 33a escapes through spring action in the same way as in the first embodiment.
- rotor 30 together with guide roller 35 move in the C direction escaping from roller pin 33a by space B between guide roller 35 and recessed surface 32b.
- the design is that rotor 30 securely engages with the second and succeeding roller pins 33 by moving forward under the guidance of guide roller 35 rolling over rear surface 32a of base 32.
- Figure 4 shows a yet further arrangement.
- roller pin 33a which is the first roller pin of pin-rack type engagement member 31 to engage with toothed rotor 30, is supported beforehand in a position which is withdrawn further than the other roller pins 33 from toothed rotor 30 by distance D, which is only small.
- Figure 5 shows the case in normal operation when the specialized steps are not activated.
- Figure 6 shows the case in which the specialized steps are activated and operated for loading a wheelchair.
- Indicator plates 26 are provided on the upper surfaces of coupling rods 22a. Each indicator plate 26 is composed of a white indicator plate 26a, a red indicator plate 26b and a blue indicator plate 26c in the logitudinal direction. Also, as shown in Figure 10, inspection ports 29 are provided in the grooves of cleats 28 of tread 27 above indicator plates 26 so that the differences of color on indicator plates 26 can be seen.
- Figure 7 shows the state when specialized steps 10, 11 and 12 are activated and are running on the slope in a state capable of loading a wheelchair.
- Figures 8 and 9 are drawings showing external appearances of the specialized steps.
- Figure 8 is the normal running state
- Figure 9 is the state capable of loading a wheelchair.
- An escalator capable of transporting wheelchairs is constructed as described above so that a space for wheelchair loading is ensured by linking specialized steps 10, 11 and 12.
- Figure 11(a) shows a cross-section of a step which has the wheel-stop system
- Figure 11(b) shows the detailed construction of an overload absorption system.
- 36 is wheel-stop
- 37 is a wheel-stop guide roller
- 38 is a pinion which engages with the wheel-stop 36
- 39 is a spur gear which engages with the pinion 38
- 40 is a shaft of spur gear 39
- 41 is a bevel gear secured to the same shaft as spur gear 39
- 42 is a bevel gear which engages with bevel gear 41.
- 43 is an overload absorption system mounted on bevel gear shaft 44, and is composed of a hub 43a, friction plates 43b, a spring 43c, a keep plate 43d and a nut 43e.
- a gear wheel 45 is mounted sandwiched between friction plates 43b.
- 46 is a spur gear which engages with gear wheel 45.
- Figure 12 shows the case where wheel-stop 36 advances and Figure 13 shows the case where a wheelchair is on wheel-stop 36.
- 36a is a detector arm which extends the lower part of wheel-stop 36 further than the underside of a riser 49.
- 48 is a limit switch provided on escalator truss 1 in the path of detector arm 36a.
- Figure 14 shows the essential parts of the escalator control circuit.
- 50 is an escalator starting switch and 51 is a stopping switch.
- 52 is an escalator starting relay.
- 52a are normally-open contacts for self-holding.
- 53 is a wheelchair operation switch.
- 54 is a wheelchair operation ending switch.
- 55 is a wheelchair operation relay.
- 55a are normally-open contacts for the self-holding of relay 55.
- 55b are contacts which are normaly closed and only open for wheelchair operation.
- 48b are the normally-closed contacts of limit switch 48.
- the stopping operation for the escalator at this time is described with reference to Figure 14.
- the escalator is started by starting switch 50, and starting relay 52 is excited so that a self-holding circuit is formed by contacts 52a.
- wheelchair operation switch 53 is closed in order to shift to wheelchair operation, wheelchair operation relay 55 is excited.
- normally-closed contacts 55b of circuit A will open so that wheelchair operation is commenced.
- limit switch 48 operates as described above and its contacts 48b open, starting relay 52 is de-energized.
- the escalator is stopped.
- the design is that the wheel-stop is not forced by the overload absorption system to project.
- the escalator can be made to operate so that it stops automatically at such times.
- a dual-purpose escalator for wheelchairs with high safety can be provided.
- an escalator can be provided with the following improvements: increased efficiency in determining the cause and investigation and inspection operations when the performance of the escalator is poor, and increased workability and safety during periodical inspection and maintenance.
- the escalator can be stopped automatically when the wheel-stop projection operation does not occur. Therefore, the safety of wheelchair users and of the escalator system can be increased.
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- Escalators And Moving Walkways (AREA)
Abstract
Description
- This invention relates to an escalator, and more particularly to a dual-purpose escalator for wheelchairs which is capable of transporting wheelchairs for physically handicapped persons as well as ordinary users.
- Usually, general escalators cannot safely transport wheelchairs for physically handicapped persons in the horizontal attitude because the depth dimensions of the steps are short. For this reason, recently, escalator systems have been considered in which specialized steps are included in part of the endlessly arranged multiple steps. These are expanded by mechanically altering their configuration when in the wheelchair loading operation mode. Thus, a deeper space for wheelchair loading can be ensured.
- An escalator compatible with wheelchairs is disclosed in Japanese Patent Disclosure (Kokai) Shou 61-178391, and is described using Figures 15 to 20. In Figure 15, 1 is a main-frame (generally called a "truss") positioned at a slope between a landing 2 and a
landing 3 on lower and upper floors. 4 is a wheelchair in which a physically handicapped person is seated and 5 is an attendant. 6 is an attendant call button provided close to landing 2. 7 are shift switches for the wheelchair loading operation mode provided in balustrade 1a of the escalator. 8 are also wheelchair operation buttons. - In Figure 15, 9 are the multiple steps which are arranged and run in an endless form on a path constructed in main-frame 1 using guiderails and the like. The design is that the treads of
several steps 9 become of the same height as each other on the horizontal path sections at the lower and upper floors, and that the treads of eachstep 9 form stairs with levels differing from each other to run in the sloping section between. - Here, in
multiple steps specialized steps - When these first, second and third
specialized steps shift switch 7, the design is that firstspecialized step 10 is firstly activated by activatingapparatus 13 and part ofstep 9 is caused to tilt. Then, secondspecialized step 11 is activated by activatingapparatus 13, and a linkingsystem 22 provided inside it is engaged with thirdspecialized step 12. Thirdspecialized step 12, which is linked by linkingsystem 22, is supported by secondspecialized step 11 on the inclined part of escalator, so that a level space for loading wheelchairs of just 2 steps is ensured. -
Specialized steps apparatus 13 are further described using Figures 16 to 20. First, activatingapparatus 13 is provided on main-frame 1 which is the running path forsteps 9 to 12, and hasrack 13b as an engagement member capable of up and down movement throughelevator mechanism 13a. - Also, first to third
specialized steps pinions rack 13b and are mounted on each of their inner lower sides. At the same time, they are provided withdrivers pinions pinions rack 13b, which is withdrawn to the lower position of activatingapparatus 13 as shown in Figure 16. During the wheelchair loading operation mode, thepinions rack 13b, which is raised byelevator mechanism 13a of activatingapparatus 13 as shown in Figure 17, while running in the horizontal path sections at the lower or upper floor. Thus,drivers pinions - First,
specialized step 10 is provided with a tiltingstep section 16 capable of tilting partically and a surroundingfixed step section 17. As shown in Figure 16, in the normal operation mode, abolt 18a projects fromdriver 15a mounted on tiltingstep section 16 and engages with aretainer 19a offixed step section 17. Thus, tiltingstep section 16 and fixedstep section 17 are incorporated as one horizontal surface. In the wheelchair loading operation mode, drive 15a withdrawsbolt 18a by the rotation ofpinion 14a which engages withrack 13b of activatingapparatus 13 as described above, and disengages it fromretainer 19a as shown in Figure 17. And when running on the sloping section, tiltingstep section 16 changes its configuration to a tilted state about atilting rotation shaft 20, as shown in Figure 18. - Second
specialized step 11 is provided with linkingsystem 22 so that it links with and supports the tread of thirdspecialized step 12 to form a deep tread of 2 step's depth when running on the sloping section. - This linking
system 22 links with and supports, or releases the link with, amovable step section 23 of thirdspecialized step 12 by thrusting forward or withdrawing a rack-toothed coupling rod (fork) 22a in linked motion via agear 21 with the forward or reverse rotation ofdriver 15b. - Third
specialized step 12 is provided with amovable step section 23 which is supported by linkingsystem 22 of secondspecialized step 11, and afixed step section 24 which guides and supportsmovable step section 23 so as to rise and fall vialink 25 of a pantagraph. In the normal operation mode, as shown in Figure 16, abolt 18c is projected bydriver 15c mounted onfixed step section 24 and is engaged with aretainer 19c ofmovable step section 23. Thus,movable step section 23 andfixed step section 24 are incorporated as one. When in the wheelchair loading operation mode, as shown in Figure 17,driver 15c withdrawsbolt 18c and disengages it fromretainer 19c by the rotation ofpinion 14c which engages withrack 13b of activatingapparatus 13. At the same time,movable step section 23 is linked with and supported by coupling rod (fork) 22a of linkingsystem 22 which thrusts forward from secondspecialized step 11. The design is that, as shown in Figure 18,movable step section 23 follows, even on the sloping section, at the same height as that of secondspecialized step 11 by means of the upward movement oflink 25. - Also, wheel-
stops 36 are provided in thirdspecialized step 12 to prevent the falling of a wheelchair during the loading of wheel-chair 4. These wheel-stops 36 are projected from and retracted into the tread bydriver 15c. - Figures 19 and 20 are drawings showing external appearances of first to third
specialized steps - However, in the escalator constructed in the above way, when shifting from the normal operation mode to the wheelchair loading operation mode, as shown in Figure 17,
elevator mechanism 13a of activatingapparatus 13 operates and raisesrack 13b, which is the engagement member, while running (in the horizontal path sections at the lower and upper floors).Pinions specialized steps rack 13b and rotate.Specialized steps drivers pinions pinion rack 13b, the tips of the teeth will mutually interfere and excessive force will be generated if the phases of the two gears are not matched. When moving to the correctly engaged state by the pinion tooth tips sliding over the rack teeth, a shock will occur with a loud noise. This has an adverse effect on the protection of the mechanism and causes insecure feelings in the operators and the wheelchair users. - However, in the prior art dual-purpose escalator for wheelchairs as described above, when the specialized step configuration was being changed or the linking system did not operate, the design was to stop the escalator by operating a safety system. However, it was difficult to judge from the external appearance how the failure had occurred in each respective specialized step. Therefore, it was necessary to carry out an inspection by entering inside truss 1 of the escalator. This gave rise to problems of poor workability and accompanying danger.
- The problem in the step construction mentioned above, which is the focal point of this invention, is the wheel-stop mechanism provided in the third specialized step.
- As wheel-stop mechanisms proposed in prior art, there are Japanese Patent Publication No. Showa 63-17438 and Japanese Patent Publication No. Showa 63-51956.
- Although not illustrated, these are both wheel-stops which are mechanically projected. In their methods the wheel-stops are projected to specified heights or retracted to their original positions when driving forces are applied by wheel-stop mechanisms.
- However, these types of wheel-stop mechanisms have the following problems. That is to say, the case of a wheelchair or the like loaded directly above the wheel-stop mechanism for some reason or other can be considered. In such a case, with the wheel-stop mechanisms mentioned above, the following states may happen. That is, the wheel-stops may push the wheelchair upwards, or they may become in an overloaded state in which they cannot move because of the weight of the wheelchair, or the wheel-stop mechanism may be damaged. None of these states is acceptable.
- Accordingly, this invention seeks to provide a dual-purpose escalator for wheelchairs which is designed to enable increased efficiency in the determination of the cause and in the work of investigation and inspection when an operational failure of the dual-purpose escalator occurs.
- According to the invention, there is provided a dual-purpose escalator for a wheelchair, comprising:
- a plurality of steps linked in an endless form;
- a main-frame including a running path for said steps, said steps including at least two adjacent specialized steps for loading a wheelchair; and
- activation means provided on said running path for causing said specialized steps to alter a configuration thereof to a first state for a wheelchair loading operation mode or to restore said configuration to a second state for normal operation mode;
- When using this invention, the operation of the coupling rods can be checked during wheelchair operation through the inspection ports provided in the tread of the specialized step which has the coupling rods. During maintenance inspections, whether or not there is smooth thrusting forward and retraction of the coupling rods can be checked.
- A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:
- Figure 1 is a cross-section showing a possible first relationship between a toothed rotor and the engagement member in an escalator.
- Figure 2(a) is a cross-section of Figure 1 on the line X - X;
- Figure 2(b) is a cross-section of Figure 1 on the line Y - Y;
- Figure 3 is a cross-section showing a possible second relationship between a toothed rotor and the engagement member in an escalator;
- Figure 4 is a cross-section showing a possible third relationship between a toothed rotor and the engagement member in an escalator;
- Figure 5 is a cross-section showing the structures of the specialized steps in the normal operation mode according to an embodiment of this invention;
- Figure 6 is a cross-section showing the structures of the specialized steps in the wheelchair loading operation mode according to an embodiment of this invention;
- Figure 7 is a cross-section showing the structures of the specialized steps in the wheelchair loading operation mode according to an embodiment of this invention;
- Figure 8 is an oblique view showing the external structures of the specialized steps in the normal operation mode according to an embodiment of this invention;
- Figure 9 is an oblique view showing the external structures of the specialized steps in the wheelchair loading operation mode according to an embodiment of this invention;
- Figure 10 is a drawing showing the positions of the inspection ports according to an embodiment of this invention;
- Figure 11(a) is a cross-section of a step which has a wheel-stop system;
- Figure 11(b) is a cross-section showing the wheel-stop system of Figure 11(a) in more detail;
- Figure 12 is a cross-section of a step which has the wheel-stop system in which the wheel-stop advances;
- Figure 13 is a cross-section of a step which has the wheel-stop system in which a wheelchair is on the wheel-stop;
- Figure 14 is a control circuit diagram for an escalator;
- Figure 15 is a schematic drawing of a prior art dual-purpose escalator for wheelchairs;
- Figure 16 is a structural drawing of the specialized steps and the activating apparatus of the prior art escalator in Figure 15 in the normal operation mode;
- Figure 17 is a drawing showing the states of the specialized steps and the activating apparatus of the prior art escalator in Figure 15 when shifting to the wheelchair loading operation mode;
- Figure 18 is a drawing showing the state of the specialized steps on the running path on the sloping section when in the wheelchair loading operation mode in the prior art escalator in Figure 15;
- Figure 19 is a drawing showing the external appearance of the state of the specialized steps on the running path on the sloping section when in the normal operation mode in the prior art escalator in Figure 15; and
- Figure 20 is a drawing showing the external appearance of the state of the specialized steps on the running path on the sloping section when in the wheelchair loading operation mode in the prior art escalator in Figure 15.
- Referring now to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, the embodiments of this invention will be described below.
- The following is a description of a dual-purpose escalator for wheelchairs with reference to Figures 1 and 2. These show only a
toothed rotor 30 provided inspecialized steps engagement member 31 of the activatingapparatus 13 positioned in the running path -
Toothed rotors 30 are provided instead ofpinions engagement member 31 is provided instead ofrack 13b. The overall construction of the escalator apart from these is the same as in Figures 15 to 20 and has been omitted. - In Figures 1 and 2,
engagement member 31 has a pin-rack structure composed of anoblong base 32 with a U-shaped cross-section andmultiple pins 33 which are arranged parallel to each other with a specific pitch in the channel ofbase 32. Each ofpins 33 is a roller pin.Pins 33 are all mounted so that they are free to rotate. - In order to fit this type of pin-
rack engagement member 31 in which roller pins 33 are used instead of rack teeth, a sprocket is used astoothed rotor 30 in place of thepinions - When a pin-rack and a sprocket are used in place of the prior art rack and pinion, despite the composition being simple, the engagement is smooth and not liable to break down, and there are the advantages of maintainability and proof against the environment being excellent. However, when
sprocket 30 and the line of roller pins 33 in pin-rack eagagement member 31 start to engage, if the phases of the sprocket and the roller pins do not match, the tips of the sprocket teeth and the roller pins will interfere. Thus there is the defect that an excessive force will be produced in both the sprocket and the roller pins and, as the tips of the sprocket teeth slip over the roller pins in moving to a correctly engaged state, a shock will occur accompanied by a loud noise. - Here, as a preventive measure, out of the multiple roller pins 33 of pin-rack
type engagement member 31,pin 33a which is the first to engage with toothed rotor (sprocket) 30 is supported bybase 32 via aspring member 34, such as a plate spring, so that it is capable of displacement (escape) in a direction away fromtoothed rotor 30. - With this type of construction, in shifting to the wheelchair loading operation mode, when
toothed rotor 30 on the specialized steps side starts to engage with roller pins 33 of the pin-rack 31 which is the engagement member of the activatingapparatus 13 on the running path side, the teeth ofrotor 30 may interfere withfirst pin 33a ofengagement member 31. Should this happen,first pin 33a is supported byspring member 34 so that it is capable of displacement and can escape by the action of the spring. Therefore, quieter and smoother engagement can be achieved by keeping interference to the minimum. Thus, the occurrence of loud noises and shocks can be prevented, and an escalator which is compatible with wheelchair loading with quietness and with a high sense of security can be obtained. - Figure 3 shows a further arrangement. Here, toothed rotor (sprocket) 30 is guided and supported at the position of first contact with
engagement member 31 so as to be capable of escape movement away fromengagement member 31. That is to say, both toothed rotor (sprocket) 30 and aguide roller 35 are kept at a constant spacing A from each other on the vertical axis via a connecting member (not illustrated). The sprocket is mounted inside the specialized step so that it is capable of moving with a specified stroke in the transverse direction (the direction orthogonal to the forward direction). At the same time, recessed, surfaces 32b with slopes are formed at the front ans rear ends of theback surface 32a ofbase 32 ofengagement member 31, which is the pin-rack. - In this way, when the teeth of
rotor 30, which is the sprocket, interfere withfirst roller pin 33a ofengagement member 31, the design is thatfirst roller pin 33a escapes through spring action in the same way as in the first embodiment. At the same time,rotor 30 together withguide roller 35 move in the C direction escaping fromroller pin 33a by space B betweenguide roller 35 and recessedsurface 32b. By this means, interference is even further suppressed, and even quieter and smoother engagement can be achieved. At the same time, the design is thatrotor 30 securely engages with the second and succeeding roller pins 33 by moving forward under the guidance ofguide roller 35 rolling overrear surface 32a ofbase 32. - Figure 4 shows a yet further arrangement. Here,
roller pin 33a, which is the first roller pin of pin-racktype engagement member 31 to engage withtoothed rotor 30, is supported beforehand in a position which is withdrawn further than the other roller pins 33 fromtoothed rotor 30 by distance D, which is only small. By this means the chance of interference betweenfirst roller pin 33a andtoothed rotor 30 is decreased and, at the same time, even if interference should occur,first pin 33a will escape by the spring action ofspring member 34 in the same way as in the previous embodiments. Thus, interference is suppressed, and even quieter engagement can be achieved. - The following is a description of an embodiment of the invention this invention with reference to the drawings. Since the overall structure of the dual-purpose escalator for wheelchairs in this embodiment is the same as in Figure 15, the explanation has been omitted, but the practical structures of the specialized steps and their operation are described.
- Figure 5 shows the case in normal operation when the specialized steps are not activated. Figure 6 shows the case in which the specialized steps are activated and operated for loading a wheelchair.
-
Indicator plates 26 are provided on the upper surfaces ofcoupling rods 22a. Eachindicator plate 26 is composed of awhite indicator plate 26a, a red indicator plate 26b and ablue indicator plate 26c in the logitudinal direction. Also, as shown in Figure 10,inspection ports 29 are provided in the grooves ofcleats 28 oftread 27 aboveindicator plates 26 so that the differences of color onindicator plates 26 can be seen. - Figure 7 shows the state when
specialized steps - An escalator capable of transporting wheelchairs is constructed as described above so that a space for wheelchair loading is ensured by linking
specialized steps - In the normal operation state of Figure 8, mainly the blue color of
blue indicator plates 26c can be seen throughinspection ports 29. Thus, attendant 5 can confirm thatcoupling rods 22a are correctly retracted by checking this. As opposed to this, in the wheelchair operation mode shown in Figure 9, mainly the white color of white indicator plates 25a can be seen throughinspection ports 29, so that the correct linking operation ofcoupling rods 22a can be confirmed. Also, the design is that in the case when the red color of red indicator plates 26b can be seen throughinspection ports 29,coupling rods 22a have not correctly performed the linking or retraction operation, and escalator stops through a safety system which is not illustrated. For this reason, the attendant can immediately judge the cause of the escalator stopping, and resetting operation for the breakdown can be performed within a short space of time. Also, during periodical inspection and maintenance periods, there is no requirement to go to the trouble of checking the operation of the internal mechanisms of the specialized steps from inside truss 1. This can be done merely by checking the operation ofindicator plates 26 throughinspection ports 29. Therefore, improvement of operational efficiency and safety can both be designed. - The following is a description of another dual-purpose escalator with reference to Figures 11 to 13. In these drawings, those items in which the constructions in Figures 15 to 20 are repeated have been given the same symbols and their descriptions have been simplified. Figure 11(a) shows a cross-section of a step which has the wheel-stop system, and Figure 11(b) shows the detailed construction of an overload absorption system. In Figure 11, 36 is wheel-stop, 37 is a wheel-stop guide roller, 38 is a pinion which engages with the wheel-
stop pinion 38, 40 is a shaft ofspur gear spur gear 39 and 42 is a bevel gear which engages withbevel gear 41. 43 is an overload absorption system mounted onbevel gear shaft 44, and is composed of ahub 43a,friction plates 43b, aspring 43c, akeep plate 43d and anut 43e. Agear wheel 45 is mounted sandwiched between friction plates 43b. 46 is a spur gear which engages withgear wheel 45. - Figure 12 shows the case where wheel-
stop 36 advances and Figure 13 shows the case where a wheelchair is on wheel-stop 36. - In Figures 12 and 13, 36a is a detector arm which extends the lower part of wheel-
stop 36 further than the underside of a riser 49. 48 is a limit switch provided on escalator truss 1 in the path ofdetector arm 36a. - Figure 14 shows the essential parts of the escalator control circuit. 50 is an escalator starting switch and 51 is a stopping switch. 52 is an escalator starting relay. 52a are normally-open contacts for self-holding. 53 is a wheelchair operation switch. 54 is a wheelchair operation ending switch. 55 is a wheelchair operation relay. 55a are normally-open contacts for the self-holding of
relay 55. 55b are contacts which are normaly closed and only open for wheelchair operation. 48b are the normally-closed contacts oflimit switch 48. - The following is a description of the operation of this embodiment.
- In Figures 11 to 14, when no load is applied to wheel-
stop 36, spur gears 45 and 46 are rotated by the drive input applied topinion 14c.Hub 43a rotates under the frictional torque betweenspur gear 45 andfriction plate 43b. This torque is sequentially transmitted to level gear 42,level gear 41, shaft 40,spur gear 39 andpinion 38 so that wheel-stop 36 advances. As shown in Figure 12, when wheel-stop 36 advances,detector arm 36a rises, and therefore, even if the escalator advances in this state,limit switch 48 will not operate. - When a wheelchair or the like is on wheel-
stop 36, even if a driving force is supplied topinion 14c, slip will occur betweenspur gear 45 andfriction plates 43b and thus wheel-stop 36 will not project. At such a time, as shown in Figure 13,detector arm 36a of wheel-stop 36 is in the lowered position. Thus, when the escalator advances,detector arm 36a will operatelimit switch 48. - The stopping operation for the escalator at this time is described with reference to Figure 14. The escalator is started by starting
switch 50, and startingrelay 52 is excited so that a self-holding circuit is formed bycontacts 52a. Whenwheelchair operation switch 53 is closed in order to shift to wheelchair operation,wheelchair operation relay 55 is excited. By this means, normally-closedcontacts 55b of circuit A will open so that wheelchair operation is commenced. At this time, whenlimit switch 48 operates as described above and itscontacts 48b open, startingrelay 52 is de-energized. Thus the escalator is stopped. - When the escalator is in normal operation, its state is as in Figure 13, which means that
limit switch 48 is always operating. However, at this time,wheelchair operation relay 55 of circuit B is de-energized and normally-closedcontacts 55b of circuit A remain in the closed state. Thus, even ifcontacts 48b opens, startingrelay 52 will not be de-energized and the operation of the escalator can continue. - In this way, when an overload is applied to a wheel-stop, the design is that the wheel-stop is not forced by the overload absorption system to project. Also, the escalator can be made to operate so that it stops automatically at such times. Thus a dual-purpose escalator for wheelchairs with high safety can be provided.
- With an escalator shown in Figures 1 to 4, shifting to the wheelchair loading operation mode can be commenced with smooth engagement between the toothed rotors on the specialized steps side and the engagement member of the activating apparatus on the running path side. Thus, the occurrence of loud noises and shocks can be prevented, and an escalator which is compatible with wheelchair loading with quietness and with a high sense of security can be obtained.
- When using the invention according to Figures 5 to 10, an escalator can be provided with the following improvements: increased efficiency in determining the cause and investigation and inspection operations when the performance of the escalator is poor, and increased workability and safety during periodical inspection and maintenance.
- Furthermore, in the case of a wheelchair being loaded above a wheel-stop, the wheelchair will not be pushed upward or overturned or will not become in an overload state, nor will the wheel-stop drive mechanism be damaged by the forced projection of the wheel-stop. Furthermore, the escalator can be stopped automatically when the wheel-stop projection operation does not occur. Therefore, the safety of wheelchair users and of the escalator system can be increased.
- Obviously, numerous modifications and variations of the present inventions are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.
a first specialized step of said specialized steps includes linking means for linking with a second specialized step of said specialized steps;
said linking means in said first specialized step includes a coupling rod activated by said activation means for linking said first and second specialized steps to provide a space for loading said wheelchair when said steps are running in said running path in said wheelchair loading operation mode; and
said first specialized step includes a tread with an inspection port therein for checking the operation of said coupling rod.
Claims (2)
- A dual-purpose escalator for a wheelchair, comprising:a plurality of steps (10, 11, 12) linked in an endless form;a main-frame (1) including a running path for said steps, said steps (10, 11, 12) including at least two adjacent specialized steps for loading a wheelchair; andactivation means (13) provided on said running path for causing said specialized steps (10, 11, 12) to alter a configuration thereof to a first state for a wheelchair loading operation mode or to restore said configuration to a second state for normal operation mode;characterised in that:
a first specialized step of said specialized steps includes linking means for linking with a second specialized step of said specialized steps;
said linking means (22) in said first specialized step includes a coupling rod (22a) activated by said activation means (13) for linking said first and second specialized steps to provide a space for loading said wheelchair when said steps are running in said running path in said wheelchair loading operation mode; and
said first specialized step includes a tread (27) with an inspection port (29) therein for checking the operation of said coupling rod (22a). - The dual-purpose escalator of claim 1, wherein:
said linking means (22) further includes an indicator plate (26) provided on the upper surface of said coupling rod (22a) which is capable of checking the operation of said coupling rod (22a) through said inspection port (29).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP119415/93 | 1993-05-21 | ||
JP11941593A JPH06329383A (en) | 1993-05-21 | 1993-05-21 | Escalator also serving as wheelchair |
EP19930309230 EP0599556A3 (en) | 1992-11-18 | 1993-11-18 | Dual-purpose escalator for wheelchair. |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19930309230 Division EP0599556A3 (en) | 1992-11-18 | 1993-11-18 | Dual-purpose escalator for wheelchair. |
EP93309230.6 Division | 1993-11-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0749932A2 true EP0749932A2 (en) | 1996-12-27 |
EP0749932A3 EP0749932A3 (en) | 1997-01-22 |
Family
ID=14760905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96115207A Withdrawn EP0749932A3 (en) | 1993-05-21 | 1993-11-18 | Dual-purpose escalator for wheelchair |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0749932A3 (en) |
JP (1) | JPH06329383A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107720515A (en) * | 2017-09-11 | 2018-02-23 | 东莞市联洲知识产权运营管理有限公司 | A kind of handrail elevator facilitated above and below perambulator |
CN111086944A (en) * | 2018-10-23 | 2020-05-01 | 奥的斯电梯公司 | Escalator and moving walkway system with safety sensor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5062519A (en) * | 1989-05-31 | 1991-11-05 | Mitsubishi Denki Kabushiki Kaisha | Escalator system with convertible step unit |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2744148B2 (en) * | 1991-07-04 | 1998-04-28 | 株式会社東芝 | Escalator device |
-
1993
- 1993-05-21 JP JP11941593A patent/JPH06329383A/en active Pending
- 1993-11-18 EP EP96115207A patent/EP0749932A3/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5062519A (en) * | 1989-05-31 | 1991-11-05 | Mitsubishi Denki Kabushiki Kaisha | Escalator system with convertible step unit |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107720515A (en) * | 2017-09-11 | 2018-02-23 | 东莞市联洲知识产权运营管理有限公司 | A kind of handrail elevator facilitated above and below perambulator |
CN111086944A (en) * | 2018-10-23 | 2020-05-01 | 奥的斯电梯公司 | Escalator and moving walkway system with safety sensor |
CN111086944B (en) * | 2018-10-23 | 2022-06-03 | 奥的斯电梯公司 | Escalator and moving walkway system with safety sensor |
Also Published As
Publication number | Publication date |
---|---|
EP0749932A3 (en) | 1997-01-22 |
JPH06329383A (en) | 1994-11-29 |
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