JPH0111567Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an object restraint device for a vehicle lift platform.

(Prior Art) In a vehicle such as a bus, when getting on and off a vehicle such as a wheelchair with a person still in it, a platform on which the vehicle is placed is supported via a parallel movement mechanism relative to the vehicle body, and the platform is placed on the vehicle body floor. The lift platform is designed to move back and forth between a rising point connected to the vehicle floor and a descending point on the road surface away from the vehicle floor.

Therefore, in such a lift platform, a stop plate for preventing objects from falling is pivotally supported on the edge of the lift platform, and when the lift platform is suspended in the air, the stop plate moves a part of the lift platform above the lift platform due to its own weight. At the above-mentioned descending point, the hanging lower end of the restraining plate comes into contact with the road surface and falls down, allowing the object to move between the road surface and the lift platform. Such a method is known (see US Pat. No. 3,913,759).

(Problem to be solved by the invention) However, in the case of the above-mentioned conventional technology, since the restraining plate is simply pivoted to the lift platform, the restraining plate is not restrained by the vibration of the lift platform while it is being raised and lowered. There is a risk that the board may rotate accidentally and fall over. Additionally, the above-mentioned restraining plate can be installed on the edge of the lift platform opposite to the vehicle body, but if it is installed on the vehicle body side, in order for the restraining plate to lie down, the lower end of the restraining plate must be lower than the vehicle floor. It is necessary to pull the lift platform into the vehicle so that the lift platform is pointing upwards, then lift it high and lower it onto the vehicle floor. It is difficult to install it on the edge of the vehicle body.

(Means for Solving the Problems) The present invention solves these problems by rotatably supporting a restraining member on the lift platform, and engaging the restraining member by advancing and retracting toward the vehicle body. an actuating member that raises and lowers the lift platform, and a biasing means that urges the actuating member in the forward direction so as to contact the vehicle body before the lift platform reaches the lifting point, and the actuating member moves away from the vehicle body and moves forward. When it is at the end, the restraining member is brought into contact with the upper surface of the actuating member in front of the rotation axis and held in the upright position, and at the above-mentioned lifting point side, the lift platform is moved laterally toward the vehicle body floor. The above-mentioned problem is solved by making the actuating member retreat by utilizing the approach caused by the above-mentioned movement, thereby causing the restraining member to lie down.

In other words, the object restraining device of the vehicle lift platform according to the present invention ascends and descends between a rising point connected to the vehicle body floor and a descending point on the road surface remote from the vehicle body floor, and In a lift platform that is supported via a parallel motion mechanism to the vehicle body so as to move laterally toward and away from the vehicle floor, a person stands up on the lift platform and gets on the lift platform. It is rotatably supported between an upright position that prevents objects from moving toward the vehicle body, and a collapsed position that collapses toward the vehicle body and allows objects to move toward the vehicle body, and is moved to the collapsed position by its own weight. a restraining member that protrudes below the rotational axis of the restraining member and rotates integrally with the restraining member; It is supported so that it can advance and retreat towards the engagement member, and when it moves forward, it pushes the engagement member and rotates the restraining member from the collapsed position to the upright position, and at the forward end, the upper surface is directed toward the engagement member from directly below the rotation axis. an actuating member that maintains the upright state of the restraining member by abutting it at a forward position; and an actuating member that urges the actuating member in the forward direction and abuts the actuating member against the vehicle body before the lift platform reaches a rising point. The present invention is characterized in that it is provided with biasing means that allows the actuating member to retreat as the lift platform approaches the vehicle body floor on the rising point side.

(Function) In the above-mentioned object restraining device, when the lift platform moves from the lowering point to the upper point, first, when the lift platform is at the lowering point, the actuating member moves forward by the urging of the urging means. are doing. The stopping member rotates and stands up due to the pushing of the engaging member by the actuating member, and the engaging member contacts the top surface of the actuating member in front of the rotation axis of the stopping member. This prevents it from collapsing due to external force.

Next, as the lift platform rises, the actuating member comes into contact with the vehicle body before reaching the rising point, and as the lift platform approaches the vehicle body floor by lateral movement, the biasing means is applied. They resist the force and retreat. As a result, the engagement between the actuating member and the engaging member is released, and the restraining member falls down under its own weight.

When the lift platform moves from a rising point to a falling point, the actuating member and the restraining member will behave in the opposite way. In other words,
As the lift platform moves away from the vehicle body floor, the actuating member moves relatively forward and the restraining member stands up, until the engagement member contacts the top surface of the actuating member at a position directly in front of the rotation axis of the restraining member. The upright state of the restraining member is maintained, and the lift platform continues to move to the lowering point.

(Effect of the invention) Therefore, according to the invention, the actuating member engages with and raises and lowers the restraining member as it advances and retreats toward the vehicle body, and the urging means that urges the actuating member in the forward direction. When the actuating member is at the forward end away from the vehicle body, the restraining member contacts the upper surface of the actuating member in front of the rotation axis and maintains the upright state, while the lift platform is being raised and lowered. The upright state of the restraining member is reliably maintained even by the vibration of Since the restraining member is made to lie down at least, the restraining member is placed on the vehicle body side and can be automatically raised and lowered in conjunction with the raising and lowering of the lift platform, without making the lift platform perform complicated lifting and lowering movements. You will be able to do this.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In Fig. 1, 1 is a bus, 2 is a boarding and alighting gate for getting on and off vehicles such as wheelchairs, and 3 is parallel between a car body floor 4 and a road surface that is outwardly away from the car body floor 4, as shown in Fig. 2. This is a lift platform that is supported so that it can be raised and lowered by a movement mechanism.

In the lift platform 3, a platform 6 on which a vehicle is placed is moved by a shaft 14 between a use state in which the tread surface is horizontal and a storage state in which the tread surface is vertical with respect to a U-shaped support member 7. It is rotatably supported and prevents objects from moving toward the vehicle body.
(The dashed line circle in the figure). In this case, the platform 6 has a stopper 15 projecting on the opposite side of the shaft 14 to the lower frame 16 of the support member 7.
It is held in a horizontal position by abutting against the lower edge of the.

The above-mentioned parallel movement mechanism includes the vehicle body frame 5 under the entrance/exit 2 and the support member 7 of the lift platform 3.
A hydraulic cylinder device 11 is provided that connects the end of one of the parallel links 8 and the vehicle body frame 5. That is, 9 is a pivot point on the vehicle body side of the parallel link 8, 10 is also a pivot point on the lift platform side, and 12 is a piston rod of the hydraulic cylinder device 11. As the piston rod 12 advances and retreats, the lift platform 3 is moved to the vehicle body floor. 4 and a descending point on the road surface away from the vehicle body floor 4 to the outside, and the vehicle body floor 4 is raised and lowered on the ascending point side.
It is designed to move laterally towards and away from the enemy.

As shown in FIGS. 3 to 5, the loaded object restraining device 18 includes a restraining member 27 supported by the lower frame 16 of the supporting member 7 so as to be able to rise and fall on the lift platform 3; An actuating means 19 for raising and lowering this restraining member 27 is provided.

First, a bracket 25 having an inverted U-shaped cross section is fixed to the lower surface of the lower frame 16, and a through hole 33 is provided in the upper walls of the lower frame 16 and the bracket 25. The restraining member 27 has an upper restraining plate and a lower engaging member 20 connected in a dogleg shape, and the engaging member 20 is passed through the through hole 33 and attached to the lower surface of the upper wall of the bracket 25. By pivoting on the rotation shaft 29,
The lift platform 3 rotates between an upright position where it stands up on the lift platform 3 and prevents objects from moving toward the vehicle body, and a collapsed position where it lies down toward the vehicle body and allows objects to move toward the vehicle body. made to move;
Moreover, it is designed to lie down under its own weight.

On the other hand, the actuating means 19 includes an actuating member 21 which is supported by the bracket 25 through its opposing vertical walls so as to be freely forward and backward, a guide roller 22 provided at the front end of the actuating member 21, and a guide roller 22 provided at the front end of the actuating member 21.
It is provided with a biasing means 23 for biasing in the forward direction.

The actuating member 21 has a forward end in which its front end protrudes forward from the support member 16 as shown in FIG. 3, and a retreat end in which the guide roller 22 is retracted inside the support member 16 as shown in FIG. It is designed to move forward and backward between the ends. In this case, the biasing means 2
3, the vertical wall of the bracket 25 and the operating member 21
The actuating member 21 is constructed of a compression spring interposed between a spring receiver 24 and a spring receiver 24, and the actuating member 21 is configured to protrude to the forward end by being biased by a biasing means 23. Further, the guide roller 22 is rotatably supported by a horizontal axis relative to the operating member 21, and is adapted to roll on a rising surface 32 at the edge of the vehicle body floor 4.

As shown in FIG. 6, the operating member 21 includes a guide roller 22 and a spring receiver 24.
An engagement hole 26 that passes through in the vertical direction and extends in the longitudinal direction is formed between the engagement hole 26 and the engagement member 20 of the restraining member 27 that engages with the engagement hole 26. . That is, the engaging member 20 includes a hook 28 that protrudes below the rotation shaft 29, and this hook 28 engages with the actuating member 21 at the rear end 31 of the engaging hole 26, and is engaged as the actuating member 21 moves forward. The member 20 is pushed forward and the restraining member 27 stands up. Further, the proximal end side of the hook 28 constitutes a stopper 30 that maintains the restraining member 27 in an upright state. That is, when the restraining member 27 stands up, the stopper 30
1 and in front of the pivot shaft 29 directly below, so as to maintain the upright state.

The above-mentioned restraining member 27 and actuating means 19 are as follows:
They are provided symmetrically on the support member 16 on both sides 6a and 6b of the platform 6, respectively. Of course, these may be provided only on one side or in the center.

Next, the operation of the vehicle lift platform will be explained.

When the lift platform 3 moves from the lowering point to the upper point, first, when the lift platform 3 is at the lowering point, the actuating member 21 is at the forward end due to the biasing force of the biasing means 23. In other words, the restraining member 27 is connected to the engaging member 20 by the actuating member 21.
The engagement member 20 is rotated and stands upright by the pushing motion of the engaging member 20, and the stopper 30 of the engaging member 20 is in contact with the upper surface of the actuating member 21 in front of the rotation shaft 29, so that it cannot be moved forward by an external force. It is designed not to collapse.

When the lift platform 3 rises due to the operation of the parallel movement mechanism, the guide roller 22 of the operating member 21 comes into contact with the rising surface 32 of the edge of the vehicle body floor 4 before reaching the rising point. The actuating member 21 is activated by the biasing means 2 as the lift platform 3 approaches the vehicle body floor 4 by lateral movement.
It moves backward against the force of 3. As a result, as shown in FIG. 4, the operating member 21 and the engaging member 2
0, the restraining member 27 falls forward under its own weight. As shown in FIG. 5, the restraining member 27 is in a state where it straddles the lift platform 3 and the vehicle body floor 4 in the collapsed state.

When the lift platform 3 moves from a rising point to a falling point, the actuating member 21 and the blocking member 27 behave in a manner opposite to the previous case. That is, as the lift platform 3 moves away from the vehicle body floor 4, the actuating member 21 moves relatively forward and the restraining member 27 rises, and the engaging member 20 moves forward from directly below the rotation shaft 29. The stop member 27 comes into contact with the upper surface of the actuating member 21, and the upright state of the stop member 27 is maintained, and the lift platform 3 continues to move to the lowering point.

Therefore, while the lift platform is being raised or lowered, the restraining member 27 is held in an upright state, thereby preventing objects from falling toward the vehicle body, and the restraining member 27 is brought down only at the rising point. Therefore, it becomes possible to transfer objects between the lift platform 3 and the vehicle body floor 4.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of a bus equipped with a lift platform, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Figs. Cross-sectional views showing each operating state of the object restraint device,
FIG. 6 is a perspective view of the actuating member. 1... Bus, 2... Entrance/exit, 3... Lift platform, 4... Vehicle floor, 6... Platform, 7... Support member, 8... Parallel link, 18... Boarding object control Device, 19... Actuation means, 20... Engagement member, 21... Actuation member, 2
3... Urging means, 27... Stopping member, 29... Rotating shaft.

Claims (1)

[Scope of Utility Model Registration Claim] A device that ascends and descends between a rising point connected to the vehicle body floor and a descending point on the road surface that is away from the vehicle floor to the outside, and that moves laterally to the vehicle floor on the ascending point side and approaches and separates from the vehicle body floor. In a lift platform supported via a parallel movement mechanism relative to the vehicle body, the lift platform is configured to stand up on the lift platform and stop objects from moving toward the vehicle body. a restraining member that is rotatably supported between an upright position and a collapsed position in which it is collapsed toward the vehicle body and allows objects to be moved toward the vehicle body, and that is brought to the collapsed position by its own weight; an engaging member that protrudes below the rotating shaft and rotates together with the stopping member; and an engaging member that is supported by the lift platform below the rotating shaft of the stopping member so as to be movable toward the vehicle body, and is capable of moving forward and backward. pushes the engaging member to rotate the restraining member from the collapsed position to the upright position, and at the forward end, the upper surface abuts against the engaging member at a position ahead of the position directly below the rotation axis to stop the restraining member. an actuating member that maintains the upright state of the member; and an actuating member that urges the actuating member in the forward direction to bring the actuating member into contact with the vehicle body before the lift platform reaches the ascent point, and What is claimed is: 1. An object restraint device for a vehicle lift platform, comprising: biasing means for allowing an actuating member to retreat as the lift platform approaches the floor.