JPH1135263A - Wheelchair-cum-escalator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair-cum-escalator which can prevent the drop of a footboard in an outward trip, in a simple structure. SOLUTION: To the center of the main frame 3 of a wheelchair-cum-footstep 1B, a support frame 10 with a Z-shape cross section is provided laterally and fixed. A stopper 11A is fixed to the front surface side at the upper part of the rear end of the support frame 10, an angular hole is formed to the stopper 11A, and the rear part of a support rod 4B is fitted to the angular hole, in the condition the support rod 4B is retreated. A roller may be provided to the rear part of the support rod 4B, so as to reduce the friction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an escalator, and more particularly to an escalator for a wheelchair.

[0002]

2. Description of the Related Art FIG. 9 is a right side view showing a schematic structure of a conventional wheelchair / escalator, and FIG. 10 is an enlarged detailed view showing a wheelchair / operating step incorporated in the wheelchair / escalator shown in FIG.

In FIG. 9, a main frame 9 generally called a trust manufactured by welding a cut angle iron to form a truss structure has a right end fixed to a landing on the upper floor of the building and a left end lower. Fixed to the side, the middle section has a 30 degree slope.

At the upper and lower ends of the main frame 9, a pair of step chain sprockets (not shown) are provided, and these step chain sprockets are wound with endless step chains.

[0005] These step chains usually include a step 1Z.
Are continuously connected via the axle of the front wheel 12 shown in FIG. 10 of the base 3 of the normal step 1Z, and a three-stage wheelchair shown in FIGS. 9 and 10 is provided between the normal steps 1Z. A combined step is connected.

In FIG. 9, a balustrade 9 is provided above the main frame 9.
In the lower part of the balustrade 9a, wheelchair dual steps 1A, 1D and 1C are shown in order from above with respect to the central part of the outward path 20A exposed at the upper part of the main frame 9. Steps 2A at the upper end of these wheelchair combined steps 1A, 1D, 1C,
On the upper surfaces of 2B and 2C, a wheelchair 19 with a motor boarded from the lower floor side is shown.

[0007] In FIG. 10, each wheelchair combined step 1A, 1
At the lower ends of D and 1C, there are a front wheel rail 18A on which these steps and the front wheels of the normal steps run, and a rear wheel rail on which each rear wheel runs.
18B is shown.

[0008] Steps 1A, 1D for wheelchairs between upper floor and middle
, A pair of support frames 5C is fixed to the lower side of each tread 2A, 2B, and a drive mechanism 8 is mounted on the lower surface of these support frames 5C. Support rods 4A and 4B are housed inside the support frame 5C, and these support rods 4A and 4B
Means that one side protrudes to the lower floor, and the lower step 2B,
The upper surface of the tip is in contact with the lower surface of the receiving seat 14 fixed to the upper floor side of 2C.

As a result, the center tread 2B is kept flush with the upper tread 2A by the support rod 4A protruding from the upper wheelchair combined step 1A, and the lower tread 2C
Also, the same surface as the tread plates 2A and 2B is maintained by a support rod 4B protruding from the center wheelchair combined step 1D.

[0010] In the wheelchair-combined escalator thus constructed, when the wheelchair-combined steps 1A, 1C and 1D are driven to the horizontal portion of the landing on the upper floor or the horizontal portion on the lower floor, they are fixed to the main frame side. The support rods 4A and 4B are driven by the drive mechanism 8 incorporating a pinion or the like that rotates by engaging with a step operation device (not shown), and retracts to the upper floor side. It becomes the same as the step of.

[0011]

However, in the escalator for a wheelchair constructed as described above, the steps of the forward path 2A shown in FIG. 9 are connected to the inside of the main frame 9 through the horizontal portion on the upper floor or the lower floor. In the state where the posture is reversed on the return path 22B, a step holding mechanism is necessary so that the step board does not fall. Inside is complicated.

In the method employing a solenoid as the step holding mechanism, a power supply mechanism for operating the solenoid is required, and an interlock mechanism with the drive mechanism 8 is also required, so that the weight of the step increases. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide an escalator for a wheelchair which has a simple structure and can prevent a tread plate from falling on a return path.

[0014]

According to a first aspect of the present invention, there is provided a wheelchair-operating step in which a horizontal wheelchair mounting surface is formed at an upper end by a support rod driven forward by switching to a wheelchair operation mode. In the connected wheelchair and escalator, a stopper is provided on the wheelchair combined step so that the rear portion of the support bar is engaged when the support bar is retracted.

According to a second aspect of the present invention, there is provided a wheelchair-operating step in which a support bar accommodated in a guide frame is driven forward by switching to a wheelchair operation mode and a horizontal wheelchair mounting surface is formed at an upper end. In the wheelchair combined escalator connected to the step, a stopper with which the rear portion of the support bar is engaged when the support bar is retracted, and an ascending guide portion for moving the support bar at the end of the retraction operation are formed in the guide frame. I do.

A wheelchair / escalator according to a third aspect of the present invention is characterized in that a roller which is pressed by a stopper when the support rod retreats and is rolled is provided at a rear portion of the support rod. A wheelchair / escalator according to a corresponding invention is characterized in that the rollers are vertically movable via an elastic body.

Furthermore, in the wheelchair / escalator of the invention according to the fifth aspect of the present invention, the stopper is provided on the stopper via an elastic body for suppressing the vertical vibration of the support rod whose rear end is engaged with the stopper. A wheelchair / escalator of the invention corresponding to claim 6 is characterized in that a stopper is fixed to a wheelchair / operating step via a support frame.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the escalator for a wheelchair of the present invention will be described below with reference to the drawings. FIG.
FIG. 1 is an enlarged partial vertical cross-sectional view showing a first embodiment of a wheelchair / escalator according to the present invention, which is shown by a conventional technique.
Corresponding to 10, the wheelchair dual-purpose step is leveled by switching to the wheelchair operation mode, and is in a horizontal position on the upper and lower floors. FIG. 2 is an enlarged view showing only the upper floor portion of the wheelchair / combined step 1B shown in FIG.

FIGS. 1 and 2 are different from FIG. 10 shown in the prior art in that the rear end of the support rod in the retracted state is located on the upper floor side of the support frame of the wheelchair combined step which is connected to the center. The other parts are the same as those in FIG. 10 in that a stopper for fitting is provided as described below.

That is, a pair of parallel portions having a long left-right direction as shown in FIG. The guide groove 7A is formed horizontally like a conventional wheelchair step.

On the other hand, a pair of rollers 6A is provided on both sides of the support rod 4B in the direction perpendicular to the paper surface via a shaft.
In FIG. 1 where B is in the retracted state, each roller 6A is provided with a guide groove 7A.
A is located at the right end.

On the further right side of the right end of the support frame 5A, a stopper 11A made of a thick plate is provided vertically, and below the stopper 11A, a support frame 10 bent in a substantially Z shape is provided.
Are provided horizontally, and both ends of the support frame 10 in the direction orthogonal to the paper surface are fixed to both sides of the base 3 of the wheelchair step 1B. The left side of the upper end of the support frame 10 contacts the lower right side of the stopper 11A and is welded to the stopper 11A. As a result, the stopper 11A is fixed to the support frame 10.

The stopper 11A is formed with a square hole 11a whose vertical direction is slightly longer in the side view (not shown) of FIG. 1 and whose upper end is located slightly above the lower end surface of the receiving seat 14. The rear end of the support rod 4B is loosely fitted to 11a, and a slight gap is formed between the upper end surface of the support rod 4B and the upper end of the square hole as shown in FIG.

A chamfer is formed on the upper end of the square hole 11a on the insertion side. A chamfer is formed at the upper end of the rear part of the support rod 4B, and the upper surface of the rear part of the support rod 4B is
A is in contact with the lower surface of the upper end of the square hole formed in A.

The support frame 10 is also attached to the wheelchair combined step 1A connected to the upper floor, similarly to the lower wheelchair combined step 1B. Next, the operation of the thus configured escalator for a wheelchair will be described.

In normal operation, as shown in FIGS. 1 and 2, the support rods 4A and 4B are housed in the wheelchair step 1B by the drive unit 8 and the connecting rod 8a, and the rear end is formed in the stopper 11A. Is inserted in the square hole.

Therefore, even if the wheelchair combined step 1B is housed in the main frame from the horizontal portion at the end of the main frame, and the wheelchair combined step 1B is turned upside down on the return path, the tread plate 2B is still supported by the support frame. The support rod 4B inserted into the support rod 5A and the stopper 11A to which the rear end of the support rod 4B fits,
Fall can be prevented.

In the escalator for a wheelchair constructed as described above, a stopper 11A to which the rear part of the support rod 4B fits is provided for the rear part of the support rod 4B.
Since it is possible to prevent the tread and the support rod 4B fixed to the lower surface of the tread from dropping when it is turned upside down, not only can the drive mechanism inside the tread be simplified, but also the tread can be reduced in weight and maintenance and Inspection work can be reduced.

FIG. 3 is a partial vertical cross-sectional view showing a state in which a wheelchair is mounted on a wheelchair-operating step of the wheelchair-operating escalator thus configured and moves to a sloping portion, and corresponds to FIG. The shape during operation is the same as that of the dual-purpose step.

As shown by the chain line in FIG. 3, the support rod 4A incorporated in the upper-floor wheelchair-operating step 1A is switched to the wheelchair operation mode in the horizontal portions on the upper and lower floors.
A lower seat of a tread plate 1B protruded to the lower floor side by a coupling drive mechanism 8 which operates by engaging with a rack provided on the main frame side, and which is incorporated in the lower wheelchair combined step 1B.
The tip is inserted below 14.

Similarly, the supporting rod 4B incorporated in the wheelchair step 1B in the middle part is also protruded to the lower floor side by the coupling drive mechanism 8 driven by engaging with the rack on the main frame side.
Receiving seat 14 of wheelchair combined step 1C connected to the lower floor side
The tip is inserted underneath.

In this state, these wheelchair dual steps 1
When A, 1B, and 1C move to the skewing portion, the tread 2B is lifted by the support bar 4A, and the tread 2C is also lifted by the support bar 4B to form the same plane as shown by the solid line at the rear of FIG. .

Next, FIG. 4 is a partial longitudinal sectional detail view showing a second embodiment of a wheelchair / escalator according to the present invention, and corresponds to FIG. 1 shown in the first embodiment. It is a corresponding figure.

FIG. 4 is different from FIG. 1 in the shape of the groove formed in the support frame, and is otherwise the same as FIG. 1 shown in the first embodiment. However, only the wheelchair dual steps in the middle are shown, and the wheelchair dual steps connected before and after this are omitted.

That is, the grooves 7B formed horizontally on both sides of the support frame 5B shown in FIG. 4 have upper end portions bent slightly upward at a gentle angle. Stopper 11B
The upper end surface of the square hole 11B is slightly higher than the square hole 11a of the stopper 11A shown in FIG. 2, and a gap E is formed between the square hole 11B and the upper end surface of the support rod 4B. ing.

In the wheelchair / escalator thus constructed, at the end of the retracting operation of the support rod 4B, as shown in FIG.
Since the gap E formed between the upper end face of the square hole of B and the gap D shown in FIG. 2 can be increased, the gap between the connecting rod 4B and the stopper 11B at the end of the operation can be increased. Friction and galling can be prevented.

Further, when the operation is completed, as shown in FIG. 5, the gap between the upper surface of the rear end of the support rod 4B and the upper end of the square hole of the stopper 11B can be reduced and brought into close contact with each other. Can be prevented from vibrating in the vertical direction in the state where the tread is stored in the main frame and inverted.

FIG. 6 is a partial longitudinal sectional view showing a third embodiment of a wheelchair / escalator according to the present invention, showing a state in which a connecting rod is retracted. FIG. 6 is a diagram corresponding to FIGS. 1 and 5 shown in FIG.
6 and FIG. 5 shown in the above embodiment.
The difference from FIG. 1 is that a roller is provided for the base end of the support rod, and the other points are the same as those in FIG.

That is, at the rear end of the support rod 4B shown in FIG. 6, a stepped threaded pin is horizontally provided, and a roller 6B is inserted into the stepped threaded pin. The inner ring is fixed with a retaining ring or the like.

As described above, the rear end of the support rod 4B is
In the wheelchair combined escalator equipped with
In the process of fitting the rear end of the support rod 4B into the square hole formed in the stopper 11C, the friction between the rotating roller 6B and the upper end surface of the square hole can be reduced, so that the operation becomes smooth and And the stopper 11 via the roller 6B.
Since it can be in close contact with the upper end surface of the square hole of C, it is possible to prevent vibration of the tread plate and the like at the time of inversion.

FIG. 7 is a partial longitudinal sectional view showing a fourth embodiment of a wheelchair / escalator according to the present invention, and corresponds to FIGS. 2, 5 and 6 shown in the above-mentioned embodiment. FIG. FIG. 7 differs from the above-described embodiment in the configuration of the stopper.

That is, the stopper 11D shown in FIG.
In the upper part of 11D, a through hole penetrating through the square hole 11c is formed vertically.

7 is inserted into the square hole 11c. The anti-vibration piece 15 having a substantially T-shaped in FIG. 7 and having a rectangular guide portion 15a in a bottom view (not shown) is formed therein. The shaft portion is inserted from below into the above-described through hole, and is fixed by a retaining ring inserted at the upper end.

A coil spring 17A is loosely fitted in a shaft portion formed on the vibration preventing piece 15 in advance, and is compressed to a predetermined mounting length by the above-described retaining ring. A chamfered portion is formed at the front of the lower end of the vibration preventing piece 15.

In the wheelchair / escalator in which the stopper 11D is formed as described above, if the upper surface of the rear end of the support rod 4B contacts the lower end surface of the vibration preventing piece 15 during the retreat operation of the support rod 4B, the coil spring 17A is slightly compressed.

Therefore, it is possible to prevent the support bar 4B from vibrating when the tread is inverted. The vibration preventing piece 15 with the compression coil spring shown in FIG. 7 may be incorporated in the embodiment employing the roller 6B shown in FIG.

Next, FIG. 8A is a partial longitudinal sectional view showing a fifth embodiment of the wheelchair / escalator according to the present invention.
FIG. 9 corresponds to claim 4 and corresponds to FIGS. 2, 5, 6, and 7 shown in the above-described embodiment.

FIG. 8 differs from the above-described embodiment in that the roller 6B incorporated in the rear part of the support rod 4B shown in FIG. 6 can be moved up and down via a compression coil spring or the like.

That is, at the rear end of the support rod 4C, FIG.
As shown in FIG. 8B, which is a partially exploded perspective view of FIG. 8A, a U-shaped groove 4a is formed in a plan view (not shown), and both sides of the groove 4a are vertically long in cross section. A guide groove 21 having a convex shape is formed. This guide groove 21
A compression coil spring 17B is inserted into the lower part of the guide groove 21. The lower end of the compression coil spring 17B is inserted into a counterbore formed in the lower end of the guide groove 21.

In the upper part of the compression coil spring 17B, a bearing 20A which is guided on both sides of the guide groove 21 and which can move up and down is inserted. The shaft 20 inserted in the center of this bearing 20A
A roller 6C is inserted into B, and the upper end surface of the roller 6C is in contact with the upper end surface of the square hole of the stopper 11F. A C-shaped retaining ring is inserted into the shaft 20B on the outer surface side of the bearing 20A.

In the wheelchair / escalator having the stopper as described above, at the end of the retreating operation of the support rod 4C, the roller 6C which comes into contact with the upper end face of the square hole is formed by the return force of the compression coil spring 6C. Since the rolling is performed by being pressed against the upper end surface, not only the evacuation operation becomes smooth, but also the vibration of the support bar when the steps are reversed can be prevented.

[0052]

As described above, according to the invention corresponding to the first aspect, the wheelchair dual-purpose step in which the horizontal wheelchair mounting surface is formed at the upper end by the support rod driven forward by switching to the wheelchair operation mode is the normal step. In the connected wheelchair / escalator, a stopper is provided on the wheelchair step so that the rear portion of the support rod engages when the support rod retreats. Obtainable.

Further, according to the invention corresponding to claim 2, when the mode is switched to the wheelchair operation mode, the support rod accommodated in the guide frame is driven forward to form a horizontal wheelchair mounting surface at the upper end. In the wheelchair combined escalator normally connected to the step, in the guide frame, a stopper with which the rear part of the support rod is engaged when the support rod retreats, and an ascending guide part for moving the support rod at the end of the retreat operation are formed in the guide frame. It is possible to obtain a wheelchair-shared escalator that can prevent the tread plate from falling on the return trip with a simple configuration.

According to the third aspect of the present invention, since the roller which is pressed by the stopper by the retreating operation of the support rod and rolls is provided at the rear portion of the support rod, the invention according to the fourth aspect is provided. According to the present invention, since the rollers are provided so as to be vertically movable via the elastic body, it is possible to obtain a wheelchair and escalator that can prevent the tread plate from dropping on the return path and further prevent vibration with a simple configuration.

Further, according to the invention corresponding to claim 5, since the locking piece for suppressing the vertical vibration of the support rod, the rear end of which is engaged with the stopper, is provided on the stopper via the elastic body. According to the invention corresponding to claim 6, since the stopper is fixed to the wheelchair dual-purpose step via the support frame, a wheelchair dual-purpose escalator that can prevent the tread plate from dropping on the return path and further prevent vibration with a simple configuration is obtained. be able to.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing a first embodiment of a wheelchair / escalator according to the present invention.

FIG. 2 is a partially enlarged detailed view of FIG. 1;

FIG. 3 is a partial longitudinal sectional view showing the operation of the first embodiment of the wheelchair / escalator according to the present invention.

FIG. 4 is a partial longitudinal sectional view showing a second embodiment of a wheelchair / escalator according to the present invention.

FIG. 5 is a partial longitudinal sectional view showing the operation of the second embodiment of the wheelchair / escalator of the present invention.

FIG. 6 is a partial longitudinal sectional view showing a third embodiment of a wheelchair / escalator according to the present invention.

FIG. 7 is a partial longitudinal sectional view showing a fourth embodiment of a wheelchair / escalator according to the present invention.

FIG. 8A is a partial longitudinal sectional view showing a fifth embodiment of a wheelchair / escalator according to the present invention, and FIG. 8B is a partially enlarged perspective view of FIG.

FIG. 9 is a right side view showing an example of a conventional wheelchair and escalator.

FIG. 10 is a partially enlarged longitudinal sectional view of FIG. 9;

[Explanation of symbols]

1A, 1B, 1C ... step combined with wheelchair, 2A, 2B, 2C
... Treadboard, 3 ... Base, 4A, 4B, 4C, 4D ... Support rod,
5A, 5B: support frame, 6A, 6B, 6C: roller, 7
A, 7B: guide groove, 8: drive mechanism, 9: main frame, 10: support frame, 11A, 11B, 11C, 11D, 11F: stopper, 11a,
11b: Square hole, 12: Front wheel, 13: Rear wheel, 14: Bearing, 15: Vibration prevention piece, 17A, 17B: Compression coil spring, 20A: Bearing,
20B: shaft, 21: guide groove.

Claims (6)

[Claims] 1. In a wheelchair / escalator in which a wheelchair dual-purpose step having a horizontal wheelchair mounting surface formed at an upper end with a support rod driven forward by switching to a wheelchair operation mode is normally connected to the step, the support rod retreats. A escalator for both wheelchairs, wherein a stopper for engaging the rear portion of the support bar is provided on the step for dual wheelchair. 2. A wheelchair dual-purpose escalator in which a support rod housed in a guide frame is driven forward by switching to a wheelchair operation mode, and a wheelchair dual-purpose step forming a horizontal wheelchair mounting surface at an upper end is connected to a normal step. An escalator combined with a wheelchair, wherein a stopper with which the rear portion of the support bar is engaged by retreating the support bar and an ascending guide portion for moving the support bar up at the end of the retreat operation are formed on the guide frame. 3. The escalator for both wheelchairs according to claim 1, wherein a roller that is pressed by said stopper and rolls on said support rod at a rear portion thereof is provided at a rear portion of said support rod. 4. The escalator according to claim 3, wherein the roller is vertically movable via an elastic body. 5. The wheelchair according to claim 1, wherein a locking piece for suppressing vertical vibration of the support bar, the rear end of which is engaged with the stopper, is provided on the stopper via an elastic body. Combined escalator. 6. The escalator according to claim 1, wherein the stopper is fixed to the wheelchair step via a support frame.