JP2000177490A - Retractable gangplank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gangplank not moving feet, not catching feet or luggage, and allowing easy stretch and retraction by hand in an emergency. SOLUTION: This gangplank comprises a hollow fixed platform 3 having a top panel 1 and lower panel 2; a moving platform 4 slidably inserted between the top panel 1 and the lower panel 2, a scissors mechanism 5 connected to a rear part of the moving platform 4; a hydraulic drive member 6 connected to the scissors mechanism 5, for stretching and retracting the scissors mechanism 5; a posture control guide rail 7 and a cam rail 8 provided on a lower face of the top panel 1; a cam roller 10 provided to the rear part of the moving platform 4 through an arm 9, for rotatably traveling on a lower face of the cam rail 8; a doglegged link 11 pivotally mounted on a lower face of the rear part of the moving platform 4; and a guide roller 12 provided to a rear part of the link 11, for traveling on a lower face of a guide rail 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crossover plate which is suitable for being arranged at an angle between a vehicle entrance and a road.

[0002]

2. Description of the Related Art There is usually a height difference between an entrance of a vehicle such as a stopped bus and the like on a road, and there is a possibility that a person's foot may trip when a person gets on or off the vehicle.

[0003] In particular, when a disabled person gets on and off the vehicle, it is very difficult and dangerous to get into the entrance of a vehicle at a high position from a low road or get off in the opposite direction.

[0004] Therefore, a stretchable crossing plate is installed in advance at the entrance of the vehicle, and when the vehicle stops, the crossing plate is extended while tilting up to the road, and walking on the crossing plate or a person with a physical disability. The passenger is getting on and off the vehicle safely by running the wheelchair carrying the vehicle.

[0005] As a crossing board for getting on and off such a vehicle, for example, one disclosed in Japanese Patent Application Publication No. 10-501780 has been developed and is commercially available.

[0006] The crossover plate is a hollow box-shaped fixed platform fixed near the entrance of the vehicle, a movable platform slidably inserted into the fixed platform and extended to the road, and hinged to the upper portion of the fixed platform. Consisting of an electric motor and a feed screw mechanism that expand and contract the movable platform,
By operating the electric motor to tilt the movable platform over the low-level road and overhang the treads on the movable platform, an inclined path can be created between the entrance of the vehicle and the road. It was done.

[0007]

According to the above-mentioned conventional crossing plate, an inclined passage can be formed between the entrance and exit of a vehicle having a height difference and on the road, so that a person can get on and off smoothly and safely. Persons with disabilities can run safely in a wheelchair, but improvements in the following problems are desired.

First, since a step board hinged to the upper part of the fixed platform is placed on the movable platform, the step board can be moved up and down through the hinge part, so that there is a person on this step board. In such a case, when the movable platform expands and contracts, the tread plate moves and the foot of the person is moved, and there is a risk that the person falls down. In addition, there is a risk that the treads will flutter and a person's foot or luggage will be pinched between the treads and the movable platform between the treads and the movable platform.

Second, since the movable platform is driven to expand and contract by the power from the electric motor, it cannot be used if the electric system fails. Therefore, we have prepared a platform pull-out bar for manually pulling out the movable platform during emergency.

Further, when the operation is switched to the manual operation, the female screw side of the feed screw mechanism is driven from the female screw side during storage, so that a very large force is required and the work is troublesome. Moreover, if the player forgets to prepare the platform drawer rod, there is a problem that the emergency drive cannot be performed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a telescopic device that does not move a person's foot, does not pinch a person's foot or luggage, and can be easily extended and retracted by manual operation even in an emergency. Is to provide a suitable transition board.

[0012]

SUMMARY OF THE INVENTION To achieve the above objects, the present invention comprises a hollow stationary platform having a top panel and a bottom panel, and a slidable insertion platform between the top and bottom panels. Movable platform, a scissor mechanism coupled to the rear of the movable platform, a hydraulic drive member coupled to the scissor mechanism to drive the scissor mechanism to extend and retract, a posture control guide rail and a cam rail provided on the lower surface of the top panel, A cam roller that is provided at the rear of the movable platform via an arm and rotatably travels on the lower surface of the cam rail;
A link in the shape of a letter to be pivotally attached to the lower surface of the rear of the movable platform, a transfer roller provided in the middle of the link and running on the lower panel, and a guide roller provided at the rear of the link and running on the lower surface of the guide rail. A cam surface curved upward is formed at the front end of the cam rail, and a slope inclined downward is formed at the front lower surface of the guide rail, and the movable platform is formed by expansion and contraction of the scissor mechanism. The movable platform moves in the retracting direction and the extending direction, and when the guide roller climbs on the slope and the cam roller climbs on the cam surface, the movable platform is inclined downward about the pivot point with the link as a fulcrum. Things.

In this case, it is preferable that the guide roller and the cam roller are formed to have an H-shaped cross section, and the guide roller and the cam roller are rotatably abutted on the guide rail and the lower surface of the cam rail to prevent lateral displacement of the movable platform. .

Similarly, a pair of L-shaped guide frames may be provided on both sides of the lower panel, and the movable roller may be moved on the guide frames to prevent the movable platform from shifting in the lateral direction. .

In each of the above means, the upper end of the sub-platform, which also serves as a lid, is pivotally attached to the front and rear ends of the top panel, and the movable platform comprises a horizontal floor and a pair of side frames standing on both sides of the horizontal floor. A rail for opening and closing the sub-platform having a hook, an inclined slope, and a horizontal guide surface is provided on an outer surface of the side frame along a longitudinal direction, and a roller for traveling on the rail is provided on a rear rear surface of the sub-platform. Is preferred.

Similarly, a pair of left and right brackets are provided on the lower surface of the rear part of the movable platform, and the front ends of the U-shaped links are pivotally connected to the brackets. It is preferable that a transfer roller is interposed between the frames, and further, the front end of the scissor mechanism is connected to the connecting frame directly or via a support plate.

Similarly, it is preferable that a fixed frame is erected on the rear upper surface of the lower panel, and the rear end of the scissor mechanism is selectively connected to the fixed frame so as to be fixed or slidable.

[0018]

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

FIG. 1 is a cross-sectional view of a stretchable crossing plate A according to the present invention.
2, a hollow box-shaped fixed platform 3 fixed to the floor of the vehicle B, and a movable platform 4 slidably inserted into the fixed platform 3. And a sub-platform 16 also serving as a lid hinged on the front end of the fixed platform 3. When the vehicle B stops, the movable platform 4 extends to the road D so that a person can enter between the entrance and the entrance C of the vehicle B. Is formed.

Similarly, as shown in FIG. 13, it can be provided at the entrance C of the luggage at the rear of the van type vehicle B and used as a passage for the luggage between the vehicle B and the road D.

The extendable crossing plate A is the same as that in FIG.

Further, the cross board A can be used for a passage in construction and civil engineering work.

The details of the crossover plate according to one embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1 and FIG. 2, the basic structure of the cross board A is a hollow fixed platform 3 having a top panel 1 and a lower panel 2 and slidable between the top panel 1 and the lower panel 2. , A scissor mechanism 5 coupled to the rear of the movable platform 4, a hydraulic drive member 6 coupled to the scissor mechanism 5 for driving the scissor mechanism 5 to expand and contract, and a lower surface of the top panel 1. A pair of left and right attitude control guide rails 7
And a cam rail 8, a cam roller 10 provided at a rear portion of the movable platform 4 via a pair of left and right arms 9, and rotatably running on the lower surface of the cam rail 8, and a pair of left and right pivotally mounted on the rear lower surface of the movable platform 4. A U-shaped link 11, a transfer roller 13 provided between the links 11 and running on the lower panel 2;
1 and a guide roller 12 running on the lower surface of the guide rail 7.

A cam surface 14 which is curved upward is formed at the front end of the cam rail 8, and a horizontal surface 7a is formed on the lower surface of the guide rail 7, and the front surface of the horizontal surface 7a is inclined downward. A slope 7b is formed.

The movable platform 3 is moved in the retracting direction as the rear side and in the extending direction as the front side by the expansion and contraction of the scissors mechanism 5.

At this time, when the guide roller 12 runs on the horizontal surface 7a of the guide rail 7, and the cam roller 10 runs on the horizontal lower surface 8a of the cam rail 8, the movable platform 4
Moves horizontally.

As shown by the dotted line in FIG.
Climbs on the slope 7b and the cam roller 10
When the mobile platform 4 gets on, the movable platform 4 tilts downward about the pivot point P with the link 11 as a fulcrum.

In the above case, the guide roller 12 and the cam roller 10 are formed to have an H-shaped cross section, and the guide roller 12 and the cam roller 10 are rotatably abutted on the lower surfaces of the guide rail 7 and the cam rail 8 so that the horizontal direction of the movable platform 4 Deformation can be prevented.

However, as shown in FIG. 2, a pair of L-shaped cross section guide frames 15, 1 are provided on both sides of the lower panel 2.
5 may be provided, and the transfer rollers 13, 13 may be moved on the guide frames 15, 15 to prevent the movable platform 4 from shifting in the lateral direction.

Hinge portions 30 are provided at the front and rear ends of the top panel 1.
The sub-platform 16 is movably mounted via the sub-platform, but can be used without the sub-platform 16. The sub-platform 16 also serves as a lid of the fixed platform 3 and the movable platform 4
Is overlaid on the movable platform 4 while being inclined to form an inclined passage.

The movable platform 2 is mounted on a horizontal floor 17 and a pair of side frames 18, 1 standing on both sides of the horizontal floor 17.
8 and a hook 20 on the outer surface of the side frame 18.
A sub-platform opening / closing rail 19 having an inclined slope 21 and a horizontal guide surface 22 is provided along the longitudinal direction.

Further, as shown in FIGS. 2 and 4, a roller 31 running on the rail 19 is provided on a rear rear surface of the sub platform 16 via a bracket 32.

For this reason, as shown in FIG. 4, when the movable platform 4 is retracted and stored in the fixed platform 3, the roller 31 is hooked on the hook 20 and pulled back, and the sub-platform 16 is The entrance of the fixed platform 3 is closed and used as a lid.

On the other hand, when the movable platform 4 is pushed outward, the roller 31 rides on the slope 21 of the rail 19, and pushes the sub-platform 16 obliquely upward through the bracket 32 and the hinge portion 30, so that the movable platform 4 The front end of the horizontal floor 17 and the front end of the side frame 18 are the sub-platform 1.
6 can be prevented from abutting or touching, and the movable platform 4 can be moved smoothly. When the movable platform 4 further moves in the front direction, the roller 31 travels on the horizontal guide surface 22 at a higher position, and the sub-platform 16 is disposed on the movable platform 4 while being inclined while pushing the sub-platform 16 higher.

A pair of left and right brackets 23, 23 are provided on the lower surface of the horizontal floor 17, which is the rear lower surface of the movable platform 4, and the tips of the U-shaped links 11, 11 are pivotally attached to the brackets 23, 23, respectively. , 11 are connected to each other, a transfer roller 13, 13 is interposed between the link 11 and the connection frame 24, and a scissor mechanism 5 is provided at the center of the connection frame 24.
The front end of the is joined. However, the scissor mechanism 5 may be directly coupled to the rear end of the horizontal floor 17 constituting the movable bracket form 4.

Further, a fixed frame 25 is erected on the rear upper surface of the lower panel 2, and the rear end of the scissor mechanism 5 is fixedly or slidably connected to the fixed frame 25 selectively. In this case, the scissors mechanism 5 includes a plurality of links 5a and 5 that are rotatably crossed in an X-shape through a central shaft.
It is formed in a pantograph type that can be extended and retracted at b.

One of the rear ends of the link 5a is pivotally connected to a hydraulic drive member 6 comprising a hydraulic cylinder, and the other link 5
The end of “a” is fixed to the fixed frame 25 side via a link mechanism 34 or is slidably attached.

The hydraulic cylinder includes a cylinder, a piston rod, and a switching valve 35. When the electric system fails, the switching valve 35 is manually switched to swing the link mechanism 34 manually.

The fixing frame 25 is formed in a box shape, and has a shaft hole 36, a fixing hole 37, and a long hole 38 formed on the surface thereof, and the link mechanism 34 has a shaft 40 rotatably inserted into the shaft hole 36. It is composed of a pin 41 slidably inserted into the fixing hole 37 or the long hole 38, and a horizontal plate 39 connecting the shaft 40 and the pin 41.

When the hydraulic cylinder is expanded and contracted by electric control, the pin 41 is inserted into the fixing hole 39 in advance. On the other hand, if the electric system fails, the cover 42 (FIG. 2) provided on the top panel 1 is opened, the switching valve 35 is manually switched, the pin 41 is inserted into the elongated hole 38, and the plate 39 is extended. Hole 3
The scissor mechanism 5 is manually driven to expand and contract by swinging along the line 8.

Next, the operation will be described.

FIGS. 6 to 9 show the movable platform 4.
Is moved from the retracted state to on the road to protrude.

As shown in FIG. 6, the transfer plate A is installed in a stored state, for example, near the entrance of the vehicle B.

When the hydraulic drive member 6 is extended from this state, the scissors mechanism 5 is extended and the movable platform 4 is moved to the position shown in FIG.
Is moved to the front left side.

At this time, the guide roller 12 runs on the horizontal lower surface of the rail 7, the transfer roller 13 runs on the lower panel 2 or the guide frame 15,
Runs on the lower surface of the cam rail 18. Therefore, the movable platform 4 is restricted by the rollers and the link 11 and moves forward while maintaining the horizontal posture.

When the guide roller 12 is pushed to the position of the downward slope 7b near the tip of the guide rail 7, the link 11 swings around the center of the transfer roller 13 as shown in FIGS. Is displaced upward, and at the same time, the cam roller 10 also moves the cam surface 1 of the cam rail 8.
4, the movable platform 4 is pushed up to the level of the top panel 1 of the fixed frame 3 while keeping the horizontal state.

Further, when the movable platform 4 is pushed forward, the guide roller 12 slightly moves down the slope 7b, and the cam roller 10 rotates above the cam surface 14.

At this time, the tip of the movable platform 4 tends to descend due to its own weight, so that the cam roller 10 rolls along the cam surface 14 to allow the bracket 9 and the movable platform 4 to descend. The movable platform 9 and the movable platform 4 are inclined about the center of a bracket 13 which is a pivot portion of the link 11, and the tip thereof is placed on a passage.
6 also falls on the movable platform 4 by its own weight, and the sub-platform 16 and the movable platform 4
And a road D is formed between the vehicle and the road D so that people can get on and off the vehicle.

When the platform 4 is stored, the movable platform 4 may be drawn into the fixed platform 3 by compressing the hydraulic drive member 6 in the opposite direction and contracting the scissor mechanism 5.

FIGS. 11 and 12 show another embodiment of the present invention. This is obtained by slightly changing the positions and mounting methods of the scissor mechanism 5, the hydraulic drive member 6, and the fixed frame 25 in the transition plate A in FIGS.

That is, the scissor mechanism 5 is formed in a pandagraph type that is extendable and contractable by links 5a and 5b crossed in an x-shape via the shaft similarly to the above. The front and rear ends of the scissor mechanism 5 are connected to the support plate 40 held in the U-shaped connecting frame 24 by the front ends of the links 5a.
1 and is slidably connected to the other, and the other link 5a is fixed.

Further, the rear rear end of the scissor mechanism 5 has one link 5b with respect to the center fixed frame 25 through an elongated hole 42.
Or slidably coupled via a link mechanism 34
, And the other link 5 a is rotatably pivotally connected to the lower panel 2 via a shaft 43.

The hydraulic cylinder as the hydraulic drive member 6 is connected between the two links 5a, 5a or 5b, 5
b, and the hydraulic cylinder has a pipeline and a switching valve 3
5 is connected to a hydraulic pressure source. Thereby, the scissors mechanism 5 expands and contracts by driving the hydraulic drive member 6 to expand and contract, and the movable platform 4 is extended or stored.

Other structures, operations, and effects are the same as those of the embodiment shown in FIGS. 1 to 9, and the same members are denoted by the same reference numerals, and the description thereof will not be repeated.

[0056]

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

According to the invention of each claim, the movable platform is inserted between the top panel and the lower panel constituting the fixed platform, and since the top panel has no movable floor on which a person can ride, the movable platform is pushed out. Initially, the foot of the person is not moved, and the movable platform does not move even when the tip of the movable platform is set on the road, so that the person is prevented from falling down or pinching his / her feet or luggage. Further, since the movement of the movable platform is controlled by the hydraulic drive member, the hydraulic drive member and the scissors mechanism can be driven manually even if the electric system fails.

Similarly, the movable platform is retracted or extended by the expansion / contraction drive of the hydraulic drive member and the scissor mechanism, so that the passage can be installed smoothly. At this time, by moving the movable platform to the guide rail and cam rail through the link, the guide roller and the cam roller, a horizontal attitude is obtained at the initial stage of the movement, and the inclination is automatically inclined near the end of the guide roller and the cam roller. The passage can be automatically set, the passage can be set safely and smoothly, and the workability is remarkably improved.

According to the second or third aspect, the movable platform can move without shifting in the lateral direction, so that the movable platform can be smoothly moved without any play.

According to the fourth aspect of the present invention, since the sub-platform which also serves as the lid is provided on the top panel, the end of the fixed platform can be closed when the movable platform is stored, and when the movable platform is overhanged. An inclined passage can be formed in cooperation with the movable platform. In addition, since the sub-platform is pushed up by the rollers running on the rails when the movable platform is extended and contracted, the movable platform can be smoothly moved without interfering with the movable platform.

According to the fifth aspect of the present invention, the scissor function is attached via the flat U-shaped connecting frame and is linked to the link, so that the scissor mechanism can be easily assembled. According to the invention of claim 6, since the scissor mechanism can be driven even by manual operation, the movable platform can be moved even if the electric system fails.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a crossover plate according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a schematic cross-sectional plan view of FIG.

FIG. 4 is a partially enlarged longitudinal sectional view of an opening / closing mechanism of a sub platform.

FIG. 5 is an enlarged vertical sectional side view of a guide rail, a cam roller, a guide roller, and a roller.

FIG. 6 is a schematic vertical sectional view showing a state of a movable platform stored in a fixed platform.

FIG. 7 is a schematic vertical sectional side view showing an operating state of the movable platform in the initial stage of overhang.

FIG. 8 is a schematic vertical sectional side view showing a state in which a movable platform is extended to near a tip of a fixed platform.

FIG. 9 is a schematic longitudinal sectional side view showing a state where a movable platform is installed on a road.

FIG. 10 is a partially cutaway perspective view of a crossover plate according to another embodiment of the present invention.

FIG. 11 is a schematic plan view of FIG. 1;

FIG. 12 is a schematic perspective view of a cross board provided at the entrance of the bus.

FIG. 13 is a schematic perspective view of a crossover plate provided at a luggage doorway of a van type vehicle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top panel 2 Lower panel 3 Fixed platform 4 Movable platform 5 Scissors mechanism 6 Hydraulic drive member 7 Guide rail 8 Cam rail 9 Arm 10 Cam roller 11 Link 12 Guide roller 13 Transfer roller 14 Cam surface 15 Guide frame 16 Sub-platform 17 Horizontal floor 18 Side Part frame 19 Rail 20 Hook 21 Inclined slope 22 Guide surface 23 Bracket 25 Fixed frame

Claims (6)

[Claims] 1. A hollow fixed platform having a top panel and a lower panel, a movable platform slidably inserted between the top panel and the lower panel, a scissor mechanism coupled to the rear of the movable platform, and a scissor mechanism. A hydraulic drive member coupled to the scissors mechanism for driving the scissors mechanism to expand and contract; a guide rail and a cam rail for posture control provided on the lower surface of the top panel; and a lower surface of the cam rail provided on a rear portion of the movable platform via an arm. A cam roller that runs freely, a link in the shape of a letter that pivots on the lower surface of the rear of the movable platform, a transfer roller that is provided in the middle of the link and runs on the lower panel, and the guide rail that is provided at the rear of the link And a guide roller that runs on the lower surface of the cam rail. Forming a cam surface curved upward, forming a slope inclined downward on the lower front side of the guide rail, the movable platform moves in the retracting direction and the projecting direction due to expansion and contraction of the scissor mechanism,
A stretchable crossover plate, wherein the movable platform is inclined downward about a pivot point with a link as a fulcrum when the guide roller climbs on the slope and the cam roller climbs on the cam surface. 2. The guide roller and the cam roller are formed to have an H-shaped cross section, and the guide roller and the cam roller are rotatably abutted on the guide rail and the lower surface of the cam rail to prevent lateral displacement of the movable platform. 1 telescopic crossover. 3. A pair of L-shaped guide frames are provided on both sides of the lower panel to prevent the movable platform from moving laterally by moving a transfer roller on the guide frames. Telescopic crossover. 4. An upper end of a sub-platform serving also as a lid is pivotally attached to front and rear ends of a top panel, and a movable platform is constituted by a horizontal floor and a pair of side frames standing on both sides of the horizontal floor. A rail for opening and closing the sub-platform having a hook, an inclined slope, and a horizontal guide surface on an outer surface of the sub-platform along a longitudinal direction, and a roller running on the rail at a rear rear surface of the sub-platform. Item 1. A stretchable crossing board according to item 1, 2 or 3. 5. A pair of left and right brackets are provided on the lower surface of the rear part of the movable platform, the front ends of the U-shaped links are pivotally connected to the brackets, and a flat U-shaped connection frame is connected between the links, and the links are connected to the links. The telescopic transfer plate according to claim 1, 2, 3 or 4, wherein a transfer roller is interposed between the connection frames, and the front end of the scissor mechanism is connected to the connection frame directly or via a support plate. 6. A fixed frame is erected on a rear upper surface of a lower panel, and a rear end of the scissor mechanism is selectively connected to the fixed frame so as to be fixed or slidable.
2, 3, 4 or 5 telescopic crossovers.