JP2001026391A - Escalator for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an escalator for wheelchairs that obviates the danger that its wheelchair deck part will fall off with simple means, requires no large installation areas in the head and foot wheelchair landings and is less liable to malfunctions. SOLUTION: This escalator for wheelchairs has a selection lever 9 disposed under a first footstep 3 to change over the normal and wheelchair-carrying states of the first footstep 3, and selectors 6 installed on the trusses in the head and foot escalator landings and positioned for action on the selection lever 9 when moved vertically or laterally in the wheelchair-carrying state so as to switch the selection lever 9 over while the first footstep 3 advances horizontally. Lifting/lowering motion or inclination in the wheelchair-carrying state checks inside motion to protect it against changing to the other state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair escalator having a special step capable of carrying a wheelchair,
In particular, the present invention relates to a wheelchair escalator having a switching device for switching between a normal escalator state and a wheelchair transport state.

[0002]

2. Description of the Related Art Conventional escalators for wheelchairs include, for example, escalators for wheelchairs described in JP-A-9-505546 and JP-A-11-79637. The former escalator for a wheelchair is provided with a special step on which a step board moves up and down to mount the wheelchair. Also, the latter wheelchair escalator has a special step that is inclined to mount the wheelchair. The special step does not move up and down or tilt during normal operation of the escalator, and has the same function as the normal step and carries ordinary passengers. Lifting or tilting is performed when the operation is switched to the operation of transporting a wheelchair.

For example, in the former escalator for a wheelchair, a special step to be moved up and down is switched so that a part to be moved up and down is fixed to a step main body to be in a state of a normal step.
It is fixed to a support arm provided on a step located immediately in front of the step and may be in a state of carrying a wheelchair.
Switching between the two states is performed by moving a switching lever provided at a lower portion of the special step by a switching device provided on a truss which is a framework of the escalator body. FIG. 29 is a view principally showing an example of the conventional device for switching a wheelchair escalator and a special step which can be switched up and down, and is a front view as viewed from a lower landing.

The operation of the conventional switching device for a wheelchair escalator and the operation of a special step will be described with reference to FIG. In FIG. 29, the first step 3 which is a special step and which moves up and down is composed of a step main body 21 and a protruding portion 22 from which the tread plate protrudes. Inside the protruding portion 22 is a coupling plate 37 fixed to the protruding portion 22 and capable of moving outward and inward. A second step (5), which is a special step (not shown), is provided immediately before the first step 3 (on the far side in the drawing), and two second steps (5) are provided below the second step (5). Support arm 29 is integrally fixed, and the protrusion 2
It extends to below 2.

When the connecting plate 37 moves outward, the connecting plate 37 is connected to the connecting groove 52 of the step body 21 to be in a normal state. Become. FIG. 29 shows a state in which after being brought into a state of transporting a wheelchair, it is lifted by the support arm 29 and the protruding portion 22 slightly protrudes from the step body 21.

A roller 8 is provided at the lower end of the step body 21.
A switching lever 9 is provided. The switching lever 9 has a shaft 41 fixed to the step body 21.
The branch 19 of the switching lever 9 and the coupling plate 37 are connected and linked by a link mechanism 42 provided inside the protrusion 22. The switching lever 9 is moved by the cam of the switching device 6 which has previously been moved to a position acting on the switching lever 9 when the first step 3 travels on the horizontal portion of the escalator. Then, the link mechanism 42
Moves the coupling plate 37 to switch between the two states. The switching lever 9 is held at each of the above two positions by holding means (not shown).

When viewed from the side, the switching device 6 is arranged as shown in FIG. 28, for example, at the escalator lower landing. The relationship between the switching device 6 and the special step that can be switched to the switching device 6 will be further described with reference to FIG.

FIG. 28 shows a case where the escalator is in a rising operation. At this time, as shown in FIG. 28 (a), when the inclined special step 4 first travels horizontally on the switching device 6, the switching lever 9b is turned on the cam 7 of the switching device 6.
2 to switch from a normal state to a state of transporting a wheelchair. During this changeover, the special step 5 immediately following runs from A to B. By switching, the special step 5 is in a state of supporting the special step 4, so that A
Is a part of horizontal traveling.

Next, when the special step 3 ascending and descending horizontally moves on the switching device 6 as shown in FIG. 28 (b), the switching lever 9a is moved by the cam 72 to switch to the state of transporting the wheelchair. During this switch, the same special step 5 immediately before runs from C to D. By switching,
Since the special step 5 is in a state of supporting the special step 3, C to D are also horizontal traveling parts.

[0010] Similarly, at the landing above the escalator, portions corresponding to A, B, C, and D are portions for horizontal traveling.

[0011]

First, problems of the escalator for a wheelchair shown in FIG. 29 will be described.

FIG. 29 shows that the protruding portion 22 is provided on the step body 21.
It is in a state where it protruded a little from. In this state, the coupling plate 37 is on the side of the support arm 29 and the coupling groove 38
However, there is nothing on the opposite side, and it is separated from the coupling groove 52 of the step body 21 in an oblique direction. Since the coupling plate 37 and the switching lever 9 are linked by the link mechanism 42, the switching lever 9 is in this state.
If any external force acts on the connecting plate 37, such as a foreign object, the connecting plate 37 may be disengaged from the connecting groove 38 of the support arm 29, and the protruding portion 22 on which the wheelchair is mounted may fall.
The only means preventing this danger is the holding means for holding the switching lever 9 in the position for transporting the wheelchair.

It is a first object of the present invention to fundamentally eliminate the danger of the wheelchair mounting portion dropping by simple means without relying on the holding means as described above.

Next, problems of the escalator for a wheelchair shown in FIG. 28 will be described.

In FIG. 28, A, B, C and D are portions where the steps run horizontally. Except for the portion A where the steps of the escalator do not appear, three steps of horizontal steps are required. The escalator for wheelchairs requires a large installation space because the upper platform and the lower platform combine to provide six horizontal traveling parts.

A second object of the present invention is not to require such a large installation space.

As described with reference to FIGS. 28 and 29, the escalator for a wheelchair has two states of a normal step and a state of transporting a wheelchair at a special step. There are two states before and after. The combination is more complicated. For this reason, various bad situations occur, such as the failure of the switching device on the opposite side due to malfunction or erroneous operation of the manual operation during maintenance work, and the switching device being returned during switching of the special step, etc. In this case, the special steps and the switching device may be damaged.

A third object of the present invention is to prevent such damage of another device caused by one failure or erroneous operation.

[0019]

In order to achieve the first to third objects, a wheelchair escalator according to the first aspect of the present invention utilizes the fact that a special step is moved up or down or tilted. Alternatively, the configuration is such that the movement of the switching mechanism inside the special step is physically blocked by the inclined portion so that the state cannot be changed to a state other than the wheelchair transport state.

In the escalator for a wheelchair according to the second aspect of the present invention, the cam is extended and the switching lever is held until a state other than the above-described state of transporting the wheelchair cannot be achieved, and the traveling range of the wheelchair transport state is controlled. It is designed to ensure the whole area.

In the escalator for a wheelchair according to the third aspect of the present invention, a spring for pressing the switching lever only in the direction of the normal state is provided by utilizing the fact that the wheelchair is not physically turned into the wheelchair in the carrying state. It is configured to enhance holding in a normal state.

Further, in the escalator for a wheelchair according to the fourth aspect, by utilizing the fact that the wheelchair is not physically turned into a wheelchair in the transported state, the holding means by locking the switching lever is provided only in the normal state. The simplification is configured to further enhance the holding in the normal state.

In the escalator for a wheelchair according to the fifth aspect, the fact that the holding means for locking is provided only on the side of the normal state as described above, and the lock check switch is used to check the normal state of the special step. This is also configured to perform the above.

In the escalator for a wheelchair according to the sixth aspect, the position of the switching lever after the passage of the cam is confirmed by a sensor to confirm that the special step has been switched to the wheelchair carrying state. It is composed.

Further, in the escalator for a wheelchair according to the present invention, the cam for unlocking the lock is dimensioned so as to reach the operating position before the cam for moving the switching lever, and even if the cam stops halfway, The lock is configured to come off first.

In the escalator for a wheelchair according to the eighth aspect, the cam is fixed to the movable portion so that the special step does not proceed to the step reversing portion under the floor of the landing while the wheelchair is being transported. The step is returned to the normal state only by the fixed portion even if the movable portion is not moved.

In the escalator for a wheelchair according to the ninth aspect, when the cam is in the state of switching to the state of transporting the wheelchair, the cam escapes when the special step in the normal state advances from the opposite direction. The structure is such that a collision with damage does not occur.

Further, in the escalator for a wheelchair according to the tenth aspect, regarding the stop position of the cam, the property of the top dead center of the link mechanism is utilized so that the cam is accurate even if the driving source stops accurately or the force drops. It is configured to stop stably at the position.

Further, in the escalator for a wheelchair according to the eleventh aspect, a load detecting device is provided on the cam, and the cam is stopped when an abnormal load is applied. It is configured not to be invited.

In the escalator for a wheelchair according to the twelfth aspect of the present invention, a cam dedicated to an ascending and descending step and a cam dedicated to an inclined step are provided so that the horizontal portion of the escalator is shortened.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIGS. 1 to 27 show an embodiment of a wheelchair escalator according to the present invention.

In FIG. 1, the escalator body 1 includes:
A large number of normal steps 2 and special steps 3, 4, and 5 capable of carrying a wheelchair are provided. In the case of normal driving, the special steps 3, 4, and 5 have the same function as the normal step 2, and carry ordinary passengers.

In the case of ascending operation for transporting a wheelchair, a staff member of the escalator switches to operation for transporting a wheelchair by operating a key switch at a lower landing. Then, when the special steps 3, 4, and 5 approach the horizontal portion 11 of the lower landing of the escalator, the escalator operates at a very low speed. The special steps 3, 4, 5 are switched to the state of transporting a wheelchair by the lower switching device 6 while traveling on the horizontal section 11.

The clerk places the passenger of the wheelchair on the special steps 3 and 5 in the state of low speed operation or temporary stop. After being put on, the bollard 10 protrudes, and the escalator has a normal speed. Special steps 3, 4, and 5 are escalator slopes 1
While stepping through 3, the special step 3 keeps a flat surface on which the steps are raised and the wheel of the wheelchair can be mounted together with the special step 5, and the special step 4 is inclined so as not to hit the wheelchair. .

When the special steps 3, 4, and 5 approach the horizontal portion 12 of the upper landing area of the escalator, the operation starts again at a low speed and the special steps 3, 4, and 5 are flat. The attendant removes the passenger of the wheelchair from the escalator in a state of slow driving or a pause. After unloading, stop 10
Is withdrawn.

The special steps 3, 4 and 5 are switched to the normal steps by the switching device 7 on the upper side while traveling on the horizontal section 12 of the escalator. After that, the escalator returns to the normal speed and returns to the normal operation state.

When the wheelchair is transported during the descending operation, the operation is the same as the case of the ascending operation except that the escalator is switched to the descending operation in advance and the landing and the landing are reversed.

FIG. 2 is a front view showing an embodiment of a switching device for a wheelchair escalator according to the present invention and a special step which can be switched to the device.

In FIG. 2, the first step 3, which is a special step, which moves up and down, comprises a step main body 21 and a protruding portion 22 from which the step board protrudes. Inside the step body 21 there is a coupling groove 52 and a smoothly finished restraining wall 70 following it. Inside the protruding portion 22 is a coupling plate 37 fixed to the protruding portion 22 and capable of moving outward and inward. Immediately before the first step 3 (on the rear side in the drawing), there is a second step 5 which is a special step (not shown). Below the second step 5, two support arms 2 are provided.
9 are integrally fixed and extend below the protruding portion 22. At the tip of the support arm 29, a coupling groove 38 is formed.

When the connecting plate 37 moves outward, the connecting plate 37 is connected to the connecting groove 52 of the step body 21 to be in a normal state. Become. FIG. 2 shows a state in which the wheelchair is transported, and is lifted by the support arm 29 so that the protrusion 2
Reference numeral 2 denotes a state where the projection 2 slightly protrudes from the step body 21. In this state, the coupling plate 37 cannot move in the opposite direction to the support arm 29 due to the restraining wall 70, so that the state other than the wheelchair carrying state cannot be achieved.

At the bottom of the step body 21, a roller 8
A switching lever 9 is provided. The switching lever 9 has a shaft 41 fixed to the step body 21.
The branch 19 of the switching lever 9 and the coupling plate 37 are connected to and linked with a link mechanism 42 provided inside the protrusion 22. The switching lever 9 is moved by the cam of the switching device 6 which has previously been moved to a position acting on the switching lever 9 when the first step 3 travels on the horizontal portion of the escalator. Then, the link mechanism 42
Moves the coupling plate 37 to switch between the two states. FIG. 3 is a plan view showing holding means of the switching lever 9 of the first step 3.

In FIG. 3, one end 36a of the spring 36 is fixed to the switching lever 9 and the other end 36b is fixed to the step body 21. As a result, the switching lever 9 is moved as shown in FIG.
Are held at the two positions A and B in FIG. The holding means is always important on the side A in the normal state. In addition, on the side B in the state of carrying the wheelchair, the protruding portion 22 is raised and is important until the above-mentioned restraint wall 70 works.

FIG. 4 is a front view showing the switching operation of the first step 3 by the switching device 6. FIG. 4A shows a normal state, and FIG. 4B shows a wheelchair transport state. When the switching operation is performed as in FIG. 4, the first step 3 and the second step 5 with the support arm 29 are in the horizontal part of the escalator.

FIG. 5 shows a state on the way from FIG. 4 (a) to FIG. 4 (b). FIG. 5A is a plan view, and FIG.
(B) is a side view. In FIG. 5, the direction U of the arrow indicates the same direction as the arrow U in FIG. In FIG. 5, the switching cam 72 is raised by an actuator 71 which is a moving mechanism, and is located at a height acting on the switching lever 9. While the first step 3 and the second step 5 are moving horizontally in the direction of the arrow, the switching lever 9 moves the switching cam 7.
Moved by two.

FIG. 6 shows a state at the end of the switching operation.
In this state, the switching lever 9 is in the state of transporting the wheelchair as shown in FIG.

FIG. 7 shows a state after the switching operation. In this state, the first step 3 is in the state shown in FIG. 2 and is restrained by the restraining wall 70 in a state of transporting the wheelchair. Further, the switching cam 72 having finished its operation is lowered by the actuator 71, and this lowering operation may be performed immediately before the escalator returns to the normal operation.

FIG. 8 shows a wheelchair carrying state holding cam for the step 3 ascending and descending. As shown in FIG. 8, the wheelchair carrying state holding cam 73 is provided as a continuation of the switching cam 72. The length of the wheelchair carrying state holding cam 73 is determined so that the protruding portion 22 is sufficiently protruded and continues to a position where the restraining wall 70 works. This ensures that the wheelchair is transported over the entire travel range of the escalator.

FIG. 9 shows a wheelchair carrying state holding cam for the inclined step 4. As shown in FIG. The position where the restraining wall 70 also works inside the inclined step 4 is a position where the inclined portion 22 is sufficiently inclined, and is longer by one step, unlike the case of FIG. 8 described above. Therefore, the wheelchair carrying state holding cam 73 protrudes from the horizontal portion of the escalator as shown in the figure. The longer cam in FIG. 9 also functions as the shorter cam in FIG.

8 and 9 show the lower portion of the escalator. In the upper portion of the escalator, the relationship between FIG. 8 and FIG. 9 is reversed, and the wheelchair carrying state holding cam 73 for the ascending / descending step 3 is moved from the horizontal portion of the escalator. Protrude. It is the same that the longer one that protrudes doubles as the shorter one.

In FIGS. 8 and 9, the exit of the wheelchair carrying state holding cam 73 becomes the entrance during the descending operation.
When the holding means of the switching lever 9 described later is omitted,
In order to introduce the switching lever 9, the chamfered portion is enlarged.

The shape of the switching cam 72 in FIGS. 5 to 9 is such that the cam advancing angle (pressure angle in the new edition) described in the Mechanical Engineering Handbook is, for example, 30 degrees as recommended in the description. Although it is determined to be within, it is not necessary to form a complicated shape that is inconvenient for manufacturing, and the condition can be satisfied with a simple arc. The connecting portion with the wheelchair carrying state holding cam 73 has a very small R portion for smooth connection. However, since the lever speed is low, it is not necessary to excessively consider the influence of acceleration.

FIG. 10 shows an embodiment of the normal state holding spring. In the holding means shown in FIG. 3, the switching lever 9 loses the holding force rapidly only when approaching the middle point between A and B, whereas the holding means in FIG. Force acts in the direction. Wheelchair transport state is restraint wall 7
Since the value is securely held at 0, this means can be employed, and the function of holding in the normal state can be further strengthened. In the holding means of FIG. 3, the place where the spring is attached is limited. However, since the spring of FIG. 10 only pulls in one direction, the spring of FIG.
There are many places that can be attached to other places.

FIGS. 12 to 15 show an embodiment of the normal state locking lever and the normal state unlocking cam. Each (a)
Is a side view and (b) is a front view. FIG. 11 is a plan view of the normal state unlocking cam for unlocking the normal state locking lever. The cam cross-sectional shape of each (a) in FIGS. 12 to 15 is the cross-sectional shape at the position of the normal state unlocking cam 75 in FIG. The cam cross-sectional shape of each (b) of FIGS.
In the figure, the cross-sectional shape at the place where the roller 8 or the roller 82 is located is shown. 12 shows a state before unlocking, FIG. 13 shows a state after unlocking, FIG. 14 shows a state after unlocking and at the start of switching lever operation, and FIG. 15 shows a state at the end of switching lever operation.

In FIG. 12, a lock lever 76 in a normal state is attached to the first step 3 so as to be rotatable by a shaft 77. The switching lever 9 provided on the first step 3 has a locking roller 80 which fits into the recess 78 of the locking lever 76 in the normal state. A spring 81 is provided between the first step 3 and the locking lever 76 in the normal state, so that the locking roller 80 does not come off the recess 78. In the normal state locking lever 76, the position of the recess 78 is determined so that the switching lever 9 is in the normal state. There is no recess for locking the wheelchair transport state.

As shown in FIG. 12, the locking roller 80 is
The state entered in 8 is a state where it is locked in the normal state. In this state, the projection 83 attached to the lock lever in the normal state is retracted. 13, when the unlocking roller 82 attached to the normal state locking lever 76 is pushed by the normal state unlocking cam 75, the locking roller 80 is disengaged from the recess 78 and the projection 83 protrudes. Further, when the state shown in FIG. 14 is reached, the switching lever 9 starts to be moved by the switching cam 72. Thus, the unlocking in the normal state is completed before the switching lever 9 is moved.

After the switching lever 9 has moved sufficiently, the unlocking roller 82 is no longer pushed from the normal state unlocking cam 75, but at this time, the locking roller 80 comes into contact with the unlocking holding portion 79, so that the normal state locking lever 76 The angle only slightly returns, and the state in which the projection 83 is also kept protruding is maintained.

The movement of the switching lever 9 continues as it is, and the movement is ended in FIG.

The combination of the above holding means will be described.

The wheelchair carrying state holding cam 73 shown in FIGS.
When the normal state holding spring 74 of FIG. 10 or the normal state locking lever 76 of FIG. 12 is used, the holding means of FIG. 3 can be omitted.

The cam 73 for holding the wheelchair transported state shown in FIGS. 8 and 9 is used.
Also, when the normal state locking lever 76 shown in FIG. 12 is used, the holding means shown in FIG. 3 can be omitted. As described above, when the holding means in the wheelchair carrying state such as the holding means in FIG. 3 is omitted, the wheelchair carrying state holding cam 73 in FIGS. 8 and 9 is always used.

FIG. 16 shows the arrangement of a confirmation limit switch 84 operated by the projection 83 and a confirmation sensor 85 responsive to the switching lever 9. FIG. 17A shows the protrusion 8.
FIG. 17B shows a state in which the confirmation limit switch 84 does not operate because 3 is retracted, and FIG. 17B shows a state in which the projection 83 protrudes and operates. The state in which the projection 83 protrudes even when the switching lever 9 is in the normal state as in the state of FIG. 17B means that, for example, the movement of the shaft 77 becomes hard and the force of the spring 81 becomes insufficient. It depends.

In FIG. 16, although the escalator is switched to the state of transporting a wheelchair, the switching device 6 is switched.
For example, in the case where does not rise, the switching lever 9 remains in the normal state even if the special step passes over the switching device 6. Then, the confirmation sensor 85 provided at the illustrated position is activated by the roller 8 to stop the escalator.

In the normal operation of the escalator, the confirmation sensor 85 is electrically disconnected so that the escalator is not stopped. A non-contact type metal sensor or the like is used for the confirmation sensor 85. However, when a limit switch is used, the sensor is mechanically activated every time a special step is passed. Determine.

If the special step which has been switched to the wheelchair carrying state in the upper switching device 7 has passed over the lower switching device 6 and is not in the normal state and locked state, The confirmation limit switch 84 provided at the position shown in FIG.
Operate by 3 to stop the escalator.

FIG. 18 shows an example of the positional relationship between the normal state unlocking cam 75 and the switching cam 72. The solid line in FIG. 18 indicates a state where the elevation of the cam is incomplete. The dotted line indicates the normal cam rising position. In FIG. 18, above the height of the solid line, the switching cam 72 pushes the roller 8 so that it can act on the switching lever 9. At this height, the unlocking cam 75 has already pushed the unlocking roller 82 to act on the lock lever 76 in the normal state, and raised the recess 78 to a height sufficient for the locking roller 80 to come out of the recess 78. I have. Therefore, according to this positional relationship, no matter how high the cam stops, the unlocked switching lever 9 is not forcibly moved by the switching cam 72, and there is no risk of breakage.

FIG. 19 shows an embodiment of a switching cam divided into movable and fixed. FIG. 19A is a plan view and FIG.
(B) is a side view of a movable part. FIG. 19B shows a cross section at the position of the spring 89. FIG. 20 shows the operation when only the fixed switching cam is used.

In FIG. 19, the switching device 6 comprises a movable part 86 and a fixed part 87. The switching cam is divided into a movable switching cam 72m and a fixed switching cam 72f. The movable part 86 also includes a normal state unlocking cam 75. When the movable part 86 is raised, the operation of the cam as described above is performed. When the movable part 86 is lowered, the state shown in FIG. 20 is obtained. FIG.
At 0, the fixed switching cam 72f does not act on the switching lever 9 in the normal state as indicated by C.
However, a switching operation is performed on the switching lever 9 in the wheelchair transport state such as A, and the switching lever 9 is brought into the normal state as B. As a result, even if the movable portion 86 is not moved, the special step can be returned to the normal state only by the fixed portion 87, and the vehicle can be prevented from proceeding to the step reversing portion under the floor of the landing in the wheelchair transport state. .

By the way, when further manual operation is involved, the raised movable portion 86 as shown in FIG.
In some cases, the switching lever in the normal state such as D moves in the direction of the inclined portion of the escalator, which is the opposite direction. In this case, in FIG. 19, the switching lever 9 pushes the slope 88 to deflect the spring 89, and the movable cam 72m escapes downward to prevent damage.

FIG. 21 shows an embodiment in which the top dead center of the link is used for the cam moving mechanism. FIG. 21A shows the raised state of the wheelchair, and FIG. 21B shows the normal state. FIG.
At 1, the entire movable portion 86 rotates about the fulcrum 90. The link mechanism formed by the link 91 and the lever 92 becomes a top dead center at the ascending position. Thereby, the motor 9 serving as a driving source is
4 does not greatly affect the position accuracy and the force stability of the movable portion 86 even if the stop accuracy or torque drops. Also,
If the amount of clearance with the special step is small at the lowered position in FIG. 21B, if the position is determined at the bottom dead center, the accuracy of the clearance is maintained.

FIGS. 22 and 23 show another embodiment of the cam moving mechanism, in which the cam is moved right and left by a link mechanism and is located at a position where the cam acts on the switching lever 9 at the bottom dead center. FIG. 22 shows a normal state, and FIG. 23 shows a wheelchair transport state. FIG. 21A is a plan view, and FIG. 21B is a front view.

In FIG. 22, the switching cam 72 is slidably supported by a block 95. Motor 9
4 rotates in one direction or forward and reverse directions, and the sensors 97a, 9
It stops at the position of 7b. As the motor, a stepping motor or a geared motor with an electromagnetic brake is used. The sensor uses a magnetic sensor or a limit switch. In FIG. 22, the switching lever 9 is a switching cam 72.
, The switching cam 72 has no effect on the switching lever 9. FIG. 23 shows a position where the link 91 and the lever 92 are at the bottom dead center, and also a position where the switching cam 72 acts on the switching lever 9.

FIG. 24 shows an embodiment of a load detecting device for stopping the escalator when an abnormal load is applied to the switching cam 72. In FIG. 24, the switching device 6 is supported by the claw-shaped fixtures 101a to 101d so as to be slidable in the horizontal direction. 3 degrees of freedom of front / back, left / right and rotation are 3
It is restrained by the load setting links 98a to 98c.
When the switching lever 9 becomes stuck due to foreign matter biting or the like and an abnormal load is applied to the switching cam 72, the load setting links 98a to 98c expand and contract, and the corresponding limit switches 99a to 99c operate to stop the escalator.

FIG. 25 shows an embodiment of a load setting link which expands and contracts with a set load. It functions as a rod-shaped component that does not expand and contract when the load is equal to or less than the set load, and expands and contracts like a spring when a force equal to or more than the set load is applied. FIG. 25A shows the characteristics, and FIG. 25B shows the structure.

In FIG. 25B, the main body 61 has guide portions 61a and 61b, and holds the rods 62a and 62b in a slidable state. The rods 62a, 62b have ends 63a, 63b and 64a, 64b, respectively, between the end 63a and the guide portion 61a and the end 64b.
The springs 65a and 65b are pressed and shrunk by an amount corresponding to the set load between the guide member 61b and the guide portion 61b.
When the load setting link is pulled, the end portion 64a and the guide portion 61a are in contact with each other, so that the rod 62a does not move at all.
b moves because the spring 65b contracts, and the load setting link extends. If the load setting link is compressed, the end 63b
The rod 62b does not move at all because the and the guide portion 61b are in contact with each other. However, when the rod 62b is compressed with a set load or more, the rod 62a moves because the spring 65a contracts, and the load setting link contracts. Thus, the characteristic shown in FIG. 25A is exhibited, and the above function is satisfied.

In addition to the configuration using the load setting link and the limit switch, an abnormal load applied to the switching cam can be detected by a load sensor or the like.

FIG. 26 shows a side view of one embodiment of the cam arrangement of the switching device according to the present invention. FIG. 27 shows a plan view of the embodiment of FIG. In FIG. 26, the switching device 6 includes switching cams 72a and 72b. The switching cam 72a switches the switching lever 9a of the special step 3 which moves up and down, and the switching cam 72b switches the tilting special step 4
Switch lever 9b.

The operation of the two switching cams 72a, 72b and the switching levers 9a, 9b is as shown in FIG.
The switching cam 72a is arranged on the right side, and the switching cam 7
Since 2b is arranged on the left side, they are independent and do not interfere with each other. It should be noted that the left and right sides can be interchanged, and the left and right sides do not necessarily have to be symmetric.

The switching cams 72a and 72b are provided with the wheelchair carrying state holding cam 73 described with reference to FIGS.
Is provided, the length of the wheelchair carrying state holding cam 73 does not need to double as the holding state of the wheelchair carrying state for the two special steps.

FIG. 26 shows the operation of the escalator in the ascending operation. First, as shown in FIG. 26 (a), when the inclined step 4 runs horizontally on the switching cam 72b, the switching lever 9b is moved to switch from the normal state to the state of transporting the wheelchair. During this switch, the intermediate step 5 immediately following runs from A to B. The switching causes the intermediate step 5 to support the inclined step 4, so that A to B are horizontal traveling parts.

Next, when the step 3 ascending and descending horizontally moves on the switching cam 72a as shown in FIG. 26 (b), the switching lever 9a is moved to switch to the state of transporting the wheelchair. During this switch, the immediately preceding intermediate step 5 travels from B to C. By switching, the middle step 5
Is in a state of supporting the ascending and descending steps 3, so that B to C are also horizontal traveling parts.

A, B and C are portions where the steps run horizontally. Except for the part A where the step of the escalator does not appear, the step becomes a horizontal traveling part for two sheets. Similarly, at the escalator upper landing, two steps of horizontal steps are used. When the upper landing and the lower landing are combined, it becomes a horizontal traveling portion for four boards, which saves space for two steps as compared with the conventional cam arrangement of FIG.

[0083]

According to the present invention described above, the following effects can be obtained.

According to the first aspect of the present invention, there is an effect of eliminating the risk that the wheelchair mounting portion will fall even if the holding means such as a spring or a lock comes off at the inclined portion of the escalator.

According to the second aspect of the present invention, there is a risk that the wheelchair mounting portion will fall even if the holding means such as the spring or the lock is removed in all sections including the section from the horizontal portion to the inclined portion of the escalator. In addition, there is an effect that these holding means can be omitted.

According to the third aspect of the present invention, the holding means for holding the normal state is hardly disengaged to improve safety, and the manufacturing cost is improved by improving the assemblability by improving the design flexibility of the spring mounting portion. Has the effect of reducing

According to the fourth aspect of the present invention, the reliability of the operation is improved by improving the ease of returning to the normal state, and the production cost is reduced by halving the adjustment of the locking position and simplifying the locking mechanism. There is.

According to the fifth aspect of the present invention, it is possible to confirm both the locked state and the normal state with only one limit switch, and there is an effect of reducing the manufacturing cost.

According to the sixth aspect of the invention, there is an effect that the switching to the wheelchair carrying state is surely confirmed and the reliability of the confirming means is kept long.

According to the seventh aspect of the invention, there is an effect of preventing damage to the equipment when the switching cam is incompletely moved due to an erroneous operation or a failure during the maintenance work.

According to the eighth aspect of the invention, there is an effect of preventing damage to the equipment when the switching cam is not moved to the position of the wheelchair transport state due to erroneous operation or failure during maintenance work.

According to the ninth aspect of the invention, there is an effect of preventing damage to the equipment when the switching cam does not return to the normal position due to an erroneous operation or a failure during the maintenance work.

According to the tenth aspect of the present invention, there is an effect that it is not necessary to require a high stop position accuracy for a drive actuator that accurately determines the height of a cam as a movable portion.

According to the eleventh aspect of the present invention, when the switching lever does not move due to pinching of a foreign object or when the switching lever and the switching cam collide with each other for some other reason, it is possible to prevent a larger device failure from occurring. Has the effect of preventing.

According to the twelfth aspect of the present invention, the number of steps that travel horizontally at the upper and lower landings can be reduced to two and the space can be saved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a wheelchair escalator according to the present invention.

FIG. 2 is a front view showing an embodiment of a switching device for a wheelchair escalator according to the present invention.

FIG. 3 is a plan view showing a step switching lever of the embodiment.

FIGS. 4A and 4B are a front view and an operation explanatory view showing a switching operation between a normal state and a wheelchair transport state in the embodiment.

5A and 5B are a plan view and a side view showing a state during a switching operation of the embodiment.

FIGS. 6A and 6B are a plan view and a side view showing a state at the end of the switching operation of the embodiment.

7A and 7B are a plan view and a side view showing a state after the switching operation of the embodiment.

FIG. 8 is a plan view (a) and a side view (b) showing one embodiment of a wheelchair carrying state holding cam according to the present invention.

9 is a plan view (a) and a side view (b) showing another embodiment of the same wheelchair carrying state holding cam. FIG.

FIG. 10 is a plan view showing an embodiment of a normal state holding spring according to the present invention.

FIG. 11 is a plan view showing an embodiment of the unlocking cam of the normal state locking lever according to the present invention.

FIG. 12 is a side view (a) and a front view (b) showing a state before unlocking in the embodiment.

FIG. 13 is a side view (a) and a front view (b) showing a state at the end of unlocking of the embodiment.

FIG. 14 is a side view (a) and a front view (b) showing a state at the time of starting the operation of the switching lever after unlocking in the embodiment.

FIG. 15 is a side view (a) and a front view (b) showing a state at the end of the operation of the switching lever after unlocking in the embodiment.

FIG. 16 is a plan view showing one embodiment of a confirmation limit switch and a confirmation sensor according to the present invention.

FIG. 17 is a front view showing a non-operation and an operation state of the confirmation limit switch of the embodiment.

FIG. 18 is a front view showing an embodiment of the arrangement of the normal state unlocking cam and the switching cam according to the present invention.

FIG. 19 is a plan view (a) and a side view (b) showing an embodiment of a movable and fixed switching cam according to the present invention.

FIG. 20 is a plan view showing the operation of the fixed switching cam of the embodiment.

FIGS. 21A and 21B are a side view and an operation explanatory view showing an embodiment using a top dead center of a link of a cam moving mechanism according to the present invention. FIGS.

FIG. 22 is a plan view (a) and a front view (b) showing another embodiment using the link bottom dead center of the cam moving mechanism.

FIG. 23 is a plan view showing a state in which the wheelchair is transported in the embodiment.

FIG. 24 is a plan view showing an embodiment of an emergency stop switching cam load detecting device according to the present invention.

FIG. 25 (a) is a characteristic diagram of the load setting link of the embodiment.
Sectional view (b) showing the structure.

26A and 26B are a side view and an operation explanatory view showing an embodiment of a cam arrangement of the switching device according to the present invention.

FIG. 27 is a plan view of the embodiment.

FIG. 28A is a side view showing an example of a cam arrangement of a conventional switching device, and FIG.

FIG. 29 is a side view showing an example of a conventional switching device for a wheelchair escalator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Escalator main body 3 ... Special step which goes up and down (or 1st step) 4 ... Special step which inclines 5 ... Special step in the middle (or 2nd step) 6 ... (lower) switching device 7 ... (upper) switching device 9 ... switching lever 9a ... first switching lever 9b ... second switching lever 10 ... car stop 21 ... step body 22 ... protruding portion or inclined portion 70 ... constraint wall 72 ... switching cam 72a ... First switching cam 72b Second switching cam 72f Fixed switching cam 72m Movable switching cam 73 Wheelchair transport state holding cam 74 Normal state holding spring 75 Normal state unlocking cam 76 Normal state locking lever 84 Confirmation limit switch 85 ... Confirmation sensor 91 ... Link 92 ... Lever 98a-98c ... Load setting link 99a-99c ... Limit Switch

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Akira Tatsuzaki 3-2-1 Sakado, Takatsu-ku, Kawasaki-shi, Kanagawa Japan Otis Elevator Co., Ltd. O-Tech Research Laboratory F-term (reference) 3F321 GB12 GB16

Claims (12)

[Claims] 1. An escalator for a wheelchair provided with at least one or more steps in which a part or all of a step plate moves up and down or inclines to mount the wheelchair when transporting the wheelchair. A first step in which the state is switched between the normal state and the state of transporting a wheelchair, and it is possible to move up and down or tilt in the state of transporting a wheelchair; A step, a second step that is positioned immediately before or immediately after the first step and raises or lowers or inclines the first step in a wheelchair carrying state; and a step attached to a lower part of the first step. A switching lever for switching between a normal state of the first step and a wheelchair carrying state, and a lever provided on the truss of the upper and lower platforms of the escalator for carrying the wheelchair. And a switching cam for moving the switching lever while the first and second steps move horizontally, the escalator being used for a wheelchair. . 2. The switching cam has a wheelchair transport state holding cam that holds the switching lever until the first step is raised or lowered or tilted to make it impossible to switch from the wheelchair transport state to another state. The wheelchair escalator according to claim 1, wherein 3. The escalator for a wheelchair according to claim 1, further comprising a normal state holding spring provided on the first step and pressing the switching lever only in a normal state direction. 4. A normal state locking lever provided on the first step and locking only when the switching lever is in a normal state side, and provided on a truss at an upper and lower landing of an escalator for transporting a wheelchair. 2. A normal state unlocking cam which is located at a position where the normal state locking lever is actuated by ascending or lateral movement, and which unlocks the locking state while the first step is advanced. The described escalator for wheelchairs. 5. A confirmation limit switch provided on a truss at an upper and lower landing of an escalator and operated when the lock lever in the normal state is unlocked to stop the escalator. Escalator for wheelchair. 6. The escalator according to claim 1, further comprising a confirmation sensor provided on the truss at the upper and lower landings of the escalator, which operates when the switching lever is in a normal state when transporting the wheelchair and stops the escalator. The described escalator for wheelchairs. 7. The normal state unlocking cam moves so as to reach a position acting on the normal state locking lever before the switching cam reaches a position acting on the switching lever. 4. The escalator for a wheelchair according to 4. 8. The switching cam comprises a movable switching cam which rises to a height acting on the switching lever when transporting a wheelchair, and a fixed switching cam always located at a height acting on the switching lever. 2. The escalator for a wheelchair according to claim 1, wherein the first step can be switched from a wheelchair carrying state to a normal state by an operation of only a cam. 9. The escalator for a wheelchair according to claim 8, wherein the movable switching cam is lowered when pushed from a direction of an inclined portion of the escalator. 10. The switching cam or the normal state unlocking cam is moved by a link mechanism or a cam mechanism, and the completely moved position is the position of the top dead center or the bottom dead center of the link mechanism or the cam mechanism. The escalator for a wheelchair according to any one of claims 1, 4 and 8, wherein 11. The escalator for a wheelchair according to claim 1, further comprising means for stopping an escalator when the switching cam receives a force equal to or greater than a set value. 12. An escalator for a wheelchair provided with at least one or more steps in which a part or the whole of a step plate moves up and down or inclines to mount the wheelchair when the wheelchair is transported, when the wheelchair is carried. A step that switches between the normal state and the state of transporting a wheelchair, and that can be raised and lowered when transporting the wheelchair; A step that switches between a state and a state of transporting a wheelchair, and is capable of inclining when transporting the wheelchair; and a step located between the step that moves up and down and the step that tilts when the wheelchair is transported. And a first switching lever attached to a lower portion of the ascending / descending step to switch between a normal state and a wheelchair carrying state of the ascending / descending step. A second switching lever attached to a lower portion of the inclined step and switching between a normal state and a wheelchair carrying state of the inclined step; and a second switching lever provided on a truss at an upper and lower landing of an escalator for transporting a wheelchair. A first switching cam located at a position acting on the first switching lever by ascending or left-right movement, and moving the first switching lever while the ascending and descending steps and the intermediate step move horizontally; Is provided on the truss of the upper and lower landings, and is located at a position acting on the second switching lever by raising or moving left and right when the wheelchair is transported, while the inclined step and the intermediate step are horizontally advanced. An escalator for a wheelchair, comprising: a second switching cam for moving a second switching lever.