JPS6222626B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a wheelchair auxiliary trolley for an escalator used when a wheelchair user uses an escalator.

[Technical background of the invention and its problems]

BACKGROUND OF THE INVENTION With the development of transportation systems, railway station platforms and the like have been installed higher or lower than ground level, and as a result, an increasing number of stations have installed escalators to improve passenger convenience.

However, it is extremely difficult for wheelchair users to use escalators, and even if they get on the escalator with an attendant, they will not be able to place the wheelchair horizontally on top of the first step of the escalator; Since the user has no choice but to straddle steps and tilt the wheelchair, there is a high possibility that the wheelchair will fall, which is extremely dangerous.

Additionally, escalators with a special structure that carry both wheelchairs and general passengers cannot often be installed due to the structure of station buildings, etc. On the other hand, there are places where escalators exclusively for wheelchairs are installed, but they are not escalators for general users. The disadvantage is that it must be installed separately.

Therefore, in order to eliminate the above-mentioned drawbacks, the present applicant has filed a patent application separate from this invention for a wheelchair auxiliary trolley for escalators having the structure shown in Figs. 1 and 2 (hereinafter referred to as , this patent application is referred to as a separate application).

Below, the bogie structure related to this separate application will be described as
To explain according to the drawings in Figures 1 and 2, 1 in the figure is the main body of the trolley on which wheelchair B on which wheelchair user A rides is placed, and the rear part is connected by a cross beam 2 that can be held and pushed by an attendant C. It has both side handle rods 3a and front both side handle rods 3b. Front wheels 4 and rear wheels 5 made of rotatable casters are mounted on both sides of the front and rear sides of the trolley body 1, and are connected to escalator steps S.
As shown in Fig. 2, the wheels are mounted on the three stages with a distance L between the axles as shown in Fig. 2, and between the front and rear wheels there is an intermediate wheel that rises above the horizontal ground plane of the front and rear wheels 4 and 5 as shown in Fig. 1. 6 is provided. 7 shows the trolley body 1 carrying wheelchair B on the horizontal part of the escalator steps.
This is a device that raises and lowers the rear wheel side and maintains it in a horizontal state in accordance with the step formation movement from the SL as shown in Figure 2, or the converse step horizontal formation movement from the step part SK. This bogie horizontal maintenance device 7 consists of a hydraulic cylinder 8 which operates a piston in the direction of the step, which is attached vertically to the rear wheel 5 side of the bogie main body 1, and a step which is attached to the lower end of the piston rod 8a of this hydraulic cylinder. Ground contact body 9
(This step contact body is made of an elastic material such as nitrile rubber with high frictional resistance, and the step S on which the front wheel 4 contacts the floor by the piston operation of the hydraulic cylinder 8.
The cart body 1 on which the wheelchair B is placed descends and touches the surface of the step S2 next to the step S1, and the rear wheel side of the cart body 1 on which the wheelchair B is placed is raised to a horizontal state as shown in FIG. A hydraulic power unit 10 (a pump, a motor, an oil tank) and a battery 11 for its operating power source. An operating switch 12 for operating the hydraulic cylinder 8 is provided on a handle portion of the rear handle rod 3a that is held by the attendant C by hand. Reference numeral 13 denotes a brake device for the front wheels 4 that is installed on the truck body 1. This brake device 13 normally locks the rotation of the front wheels 4, and only when moving the auxiliary truck can the front wheels be turned on by the attendant C's lever operation. It is capable of unlocking the wheels 4, and is attached to a leaf spring 14 attached near the front wheel 4 of the bogie body 1, and is pressed against the front wheel 4 by the spring force of the leaf spring. a brake shoe 15 that locks the rotation of the front wheel 4, a lock release lever 16 provided on the attendant grip handle portion of the truck body 1 (grip handle portion of the rear handle rod 3a), and this lock release lever. and a brake shoe tensioning wire 17 connected between the brake shoe 15 and the brake shoe 15.

Therefore, to explain how to use the auxiliary trolley related to the separate application structured as described above, first, attendant C who has been pushing wheelchair B stops wheelchair B near the escalator entrance, and then Place the wheelchair B on which the user is riding on the prepared auxiliary trolley, and push the auxiliary trolley carrying the wheelchair to the escalator entrance (hereinafter, the case of the lower floor entrance will be described) with the brake device 13 unlocked. Then, after waiting for the escalator operator to stop the escalator, the trolley is positioned on the horizontal part SL of the escalator steps S as shown on the left side of FIG. 2 and is stopped. After getting on this trolley, the escalator is started, and the said trolley is placed on the horizontal part of the upper stairway of the escalator.
Perform manual or automatic escalator operation that stops the escalator when it reaches SH.

In this case, the attendant C lowers the hydraulic cylinder 8 by operating a switch in accordance with the stair formation movement from the lower step horizontal part SL of the escalator, and moves the step contacting body 9 at the lower end of the piston rod 8a to the step surface S2. The cart body 1 on which the wheelchair B is placed is pushed up by the front wheels 4
Using the fulcrum as a fulcrum, raise the rear wheel side as shown in the middle state in Figure 2, and move it upward while maintaining the horizontal state (at this time, the front wheel 4 is moved by the brake device 1).
3). Then, the escalator step S on which the auxiliary trolley is placed is located at the stairway section.
Immediately before moving from SK to the upper stairway horizontal section SH and stopping, the operation switch 12 is activated again,
The hydraulic cylinder 8 and the step contact body 9 at the lower end of the cylinder piston rod 8a are moved upward in accordance with the step horizontal formation movement from the step part SK. In this way, the auxiliary trolley carrying a wheelchair can be raised from the lower escalator entrance to the upper escalator entrance while being maintained horizontally.
The auxiliary trolley carrying the wheelchair, which was transported to the horizontal part SH of the upper stairway of the escalator, has front and rear wheels 4,
5 is in contact with the floor, it can be easily pushed out to the floor side of the upper escalator entrance.

The structure and operation of the wheelchair auxiliary trolley related to the above-mentioned separate application are as described above, but this auxiliary trolley and the auxiliary trolley of other related applications (the above-mentioned trolley horizontal maintenance device 7 is a manual push-up lever type) Wheelchair auxiliary trolleys for escalators that allow wheelchair users to use the escalators accompanied by an attendant, including wheelchair auxiliary trolleys (e.g., wheelchair-supported trolleys), may break down when the trolley horizontal maintenance device 7 breaks down during transportation on the escalator. If the wheelchair stops operating due to poor operation (malfunction), the trolley will not be able to maintain its horizontal state, and there is a risk that the wheelchair-mounted auxiliary trolley will fall off, along with the wheelchair user and his/her attendant.

[Purpose of the invention]

The object of the present invention is to provide a wheelchair auxiliary trolley for escalators equipped with a trolley fall prevention device as a safety device, which eliminates the above-mentioned dangers of the above-mentioned separate application and other related applications. shall be.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention includes a guide bar having a slider engaging part fixed to the side surface of the trolley body so as to protrude above the handrail of the escalator, and the guide bar is movable up and down and tilted. a slider having a locking part that is removable from the slider engaging part of the guide rod that is loosely inserted into the guide rod; and a stopper that is rotatably supported by a pin on the slider and always comes into contact with the handrail to prevent the cart from falling. The slider is normally urged to disengage from and disengage from the guide rod, and when the trolley body tilts backward during escalator transportation due to a malfunction or malfunction of the trolley leveling device, the guide rod is pressed against the slider retaining portion. The vehicle is characterized by being equipped with a vehicle overturn prevention device as a safety device consisting of elastic means that allows the vehicle to be tilted and locked.

In an embodiment of the present invention, the slider engaging portion of the guide rod is formed of serrated concavo-convex teeth carved in the height direction, and the engaging portion of the slider is engaged with and disengaged from the serrated concave-convex teeth. Further, the elastic means is formed of a leaf spring that intervenes in the loose insertion gap between the guide rod and the slider and biases the slider fixed to the slider in the engagement/disengagement direction. It also features

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings of FIGS. 3 to 7. This wheelchair auxiliary trolley for escalators allows wheelchair user A to use the escalator accompanied by an attendant C.
A trolley body 1 on which a wheelchair B can be placed and pushed, and two or more escalator steps S (in the case of the embodiment, three
The front and rear wheels 4 and 5 are pivoted at a distance L between the front and rear axles spanning the step surface of the step), and the steps are provided on the trolley body 1 to form a step from the step horizontal portion SL of the escalator, or vice versa. The above-mentioned separate application is equipped with a trolley level maintenance device 7 that raises and lowers the rear wheel side of the trolley body 1 on which the wheelchair B is placed in accordance with the step horizontal formation movement from the stair portion SK and maintains the horizontal state. and a wheelchair auxiliary trolley with a structure similar to that of other related applications (the structure of this trolley is approximately the same as that shown in FIGS. 1 and 2, so the same parts are given the same reference numerals and the specific details are (The explanation of the structure and the operation when moving the escalator are omitted), there is a handrail E of the escalator (this handrail is made of rubber) on the side surface of the rear wheel 5 side of the trolley body 1. a guide rod 21 having a slider engaging portion 20 fixed to protrude upward (moves upward or downward together with the step S);
A slider 23 has a locking part 22 that is removable from the slider engaging part 20 of the guide rod 21, which is loosely inserted into the guide rod 21 so as to be vertically movable and tiltable, and a pin 24 is rotatably attached to the slider 23. A stopper 25 for preventing the cart from overturning, which is pivotally supported by the handrail E and always in contact with the handrail E (this stopper has an L shape as shown in FIG. A sliding plate 27 with a low coefficient of friction that contacts the guide bar 21 is attached to the sliding plate 27, which normally biases the slider 23 to disengage from and disengage from the guide rod 21. A trolley as a safety device comprising an elastic means 26 that allows the guide rod 21 to be tilted and locked to the slider latching portion 22 when the trolley body 1 is tilted backward during escalator transportation as shown in FIG. It is characterized by being equipped with a fall prevention device 30, and in this embodiment, the slider engaging portion 20 of the guide rod 21 has serrated uneven teeth 20a carved in the height direction as shown in FIG. The hooking portion 22 provided on the slider 23 is formed of claw-like teeth 22a that engage and disengage from the sawtooth-like uneven teeth 20a,
Further, the elastic means 26 intervenes in the loose insertion gap between the guide rod 21 and the slider 23 as shown in FIG. 5, and biases the slider 23, which is screwed and fixed to the slider 23, in a direction to disengage from and disengage from the guide rod 21. It is formed of a plate spring 26a. Although the sliding plate 27 is made of a material with a low coefficient of friction, it may also be a roller or the like attached to the stopper 25 so as to come into contact with the surface of the handrail E.

Therefore, when using an escalator with the auxiliary trolley of the present invention, which is equipped with the above-mentioned trolley overturn prevention device 30, the stopper 25 for preventing the trolley from falling over is used.
(Strictly speaking, the sliding plate 27) is moved on the escalator in a state in which it is in surface contact with the handrail E of the escalator as shown in FIG. In this case, during normal operation, the slider 23 freely moves vertically along the guide bar 21, and the stopper 25, which has a sliding plate 27 with a low coefficient of friction on the side in contact with the handrail E, moves along the handrail. Slider 23 according to the slope of E.
It rotates freely around the pin 24 of. However,
If the trolley level maintenance device 7 breaks down during escalator transportation as shown in FIG. tries to lean backwards. At this time, since the front wheel 4 of the truck body 1 is rotationally locked by the brake device 13, the guide rod 21 fixed to the truck body 1 rotates around the front wheel 4 in the direction of arrow d in FIG. The attendant moves forward, overcoming the elasticity of the leaf spring 26a, which is an elastic means, and leaning forward toward the attendant C side. As a result, the slider engaging portion 20 (serrated uneven teeth 20a) of the guide rod 21 engages the slider 23.
The sliding plate 27 of the stopper 25 is strongly pressed against the E surface of the handrail of the escalator by the force of the downward movement of the guide rod 21, as shown in FIG. , the guide rod 21
This prevents the cart from falling due to the backward tilting of the cart body 1.

〔Effect of the invention〕

Since the wheelchair auxiliary trolley for escalators of the present invention is equipped with the above-mentioned trolley overturn prevention device, even if the trolley leveling device breaks down during transportation on the escalator or becomes inoperable due to malfunction, etc. It is possible to provide a wheelchair auxiliary trolley that can reliably prevent the trolley from overturning and falling and can be used safely.

[Brief explanation of the drawing]

Fig. 1 is a side view of a wheelchair auxiliary trolley for escalators related to a separate application filed separately from this invention by the present applicant, Fig. 2 is a diagram of this auxiliary trolley in use on an escalator, and Fig. 3 is an illustration of an example of this invention. FIG. 4 is an operating state diagram showing a state in which the cart horizontal maintenance device of the wheelchair auxiliary cart for an escalator according to the embodiment breaks down and becomes inoperable during escalator transportation. FIG. 4 is a diagram of the wheelchair shown in FIG. Front view, Figure 5 is an enlarged sectional view of the main part of the - line part in Figure 4,
Figure 6 is a cross-sectional view taken along the - line in Figure 5;
The figure is an explanatory view of the operation of the cart overturn prevention device shown in FIG. 5 in a working state. A...Wheelchair user, B...Wheelchair, C...Attendant, S...Escalator steps, SL...Horizontal part of the steps, SK...Horizontal part of the steps, SH...Horizontal part of the upper stair steps, 1... Cart body, 3a, 3b...handle rod,
4...Front wheel, 5...Rear wheel, L...Distance between the front and rear wheel axles, 7...Bolly level maintenance device, 8...Hydraulic cylinder, 9...Step grounding body, 10...Hydraulic power Unit, 11... Battery, 13... Brake device, 15... Brake shoe, 16...
Lock release lever, 20...Slider engaging portion, 2
0a... Serrated uneven teeth, 21... Guide rod, 2
2... Latch portion, 22a... Claw-shaped tooth, 23... Slider, 24... Pivot pin, 25... Stopper,
26... Elastic means, 26a... Leaf spring, 27...
Sliding plate, 30...Dolly overturn prevention device.

Claims (1)

[Scope of Claims] 1. A trolley body on which a wheelchair can be placed and pushed, which allows a wheelchair user to use an escalator accompanied by an attendant, and escalator steps on the front and rear parts of the trolley body. front and rear wheels pivoted at a spacing between the front and rear axles spanning over two or more step surfaces, and a step formation movement from the step horizontal part of the escalator provided on the bogie body, or vice versa. In a wheelchair auxiliary trolley for an escalator, which is equipped with a trolley level maintenance device that raises and lowers the rear wheel side of the trolley body on which the wheelchair is mounted in accordance with the horizontal formation movement, an escalator is attached to the side surface of the trolley body. a guide rod having a slider engaging portion protruding and fixed onto a handrail; and a latch that is removably attached to the slider engaging portion of the guide rod that is loosely inserted into the guide rod so as to be movable up and down and tiltable. a slider having a section, a stopper rotatably supported by a pin on the slider and always in contact with the handrail to prevent the cart from falling; and a stopper that normally urges the slider to engage and disengage from the guide rod; A trolley overturn prevention device as a safety device comprising elastic means that allows the guide rod to be tilted and locked to the slider latching portion when the trolley body tilts backward during escalator transportation due to a failure or malfunction of the horizontal maintenance device. A wheelchair auxiliary trolley for escalators, characterized by being attached with. 2. The slider engaging portion of the guide rod is a serrated uneven tooth carved in the height direction, and the hooking portion provided on the slider is a claw-like tooth that engages and disengages from the serrated uneven tooth. A wheelchair auxiliary trolley for an escalator according to claim 1, characterized in that: 3. The elastic means allows the guide rod and slider to be loosely inserted.
Claim 1, characterized in that the slider is a plate spring interposed between the guide rods and biases the slider fixed to the slider in a direction to engage with and disengage from the guide rod.
Wheelchair auxiliary trolley for escalators as described in section.