JP3214747B2 - Stopper device for lifts mounted on vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper device which is mounted on a platform of a lift mounted on a vehicle and regulates a forward movement of a moving object such as a wheelchair mounted on the platform and moving up and down.

[0002]

2. Description of the Related Art In a lift (elevating device) mounted on a vehicle, for example, as shown in Japanese Utility Model Publication No. 59-39078, a pair of left and right parallelogram links provided at an opening of the vehicle. The platform is adapted to be raised and lowered by a mechanism and a driving device for driving the mechanism.In general, the platform is provided with a stopper device at the rear thereof for restricting the movement of a moving body such as a wheelchair to the rear when the mobile device is raised or lowered. However, a stopper device is not provided in front of the stopper device for restricting the movement of the moving body such as a wheelchair to the front when the moving body is moved up and down.

[0003]

Therefore, there is a need to enhance the safety by mounting a stopper device on the platform for restricting the moving body such as a wheelchair from moving forward when moving up and down. In addition, some windshields are provided between the front end of the platform and the vehicle body, and are wound up and down according to the elevation of the platform. There is no function to restrict the movement, and a winding and rewinding mechanism having a driving device is required, and the device is complicated and expensive. The present invention has been made in view of such a situation, and an object of the present invention is to provide a stopper device that appropriately regulates a forward movement of a moving body such as a wheelchair when moving up and down.

[0004]

To achieve the above object SUMMARY OF THE INVENTION The present onset Ming, the pair provided at the opening of the vehicle Rights
Row quadrilateral link mechanism and horizontal state by the link mechanism
The platform that is raised and lowered at
A lifting device provided with a movable driving device;
The platform is mounted on the front end of the platform
When the platform reaches the rising end, it falls on the floor of the opening
Stopper plate and assembled to the platform
At one end when the platform is in the process of lifting
Engage with the base of the stopper plate and
The platform in the upright position and the platform
When it reaches, it engages with the first cam provided on the vehicle body side at the other end.
The lock that is pushed and disengaged from the stopper plate
The clip pin and one end of the lock pin are connected to the stopper plate.
A first switch for urging the lock pin in a direction in which the lock pin
Pulling and the stopper play on the platform
The stopper plate is mounted on a shaft that can rotate coaxially with
The platform is engaged with a part of the base of the
When it reaches the rising end, it engages with the second cam
Link that is moved to disengage with the stopper plate
And the link engages the base of the stopper plate
Consists of a second spring that biases the link in the direction
The purpose of the present invention is to provide a stopper device that has been used.

[0005]

In the stopper device according to the present invention, when the platform is at a position other than its raised end, the lock pin receiving the urging force of the first spring is engaged with the upright stopper plate so that the stopper plate does not move. And holds the stopper plate in an upright state. The link receiving the urging force of the second spring resiliently engages a part of the stopper plate whose movement is restricted by the arm portion from below.

By the way, when the platform reaches the rising end, the lock pin engages with the first cam mounted on the vehicle body at the other end and is pushed to be disengaged from the stopper plate, and the link is released. The arm is rotated by engaging with the second cam attached to the vehicle body, and the arm is released from engagement with the stopper plate. Therefore, the stopper plate is rotated by its own weight and lands on the floor of the vehicle, thereby allowing a moving body such as a wheelchair placed on the platform to move from the platform into the vehicle compartment or from the vehicle compartment to the platform.

When the platform begins to descend from the rising end, the lock pin and the first cam and the link and the second cam are disengaged, and the lock pin is pushed by receiving the urging force of the first spring. And the link is second
When the stopper plate is lifted by the arm portion of the link and reaches the standing position, the lock pin engages with the stopper plate to lock the stopper plate so as not to move.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which a platform 20 of a lift A mounted on a vehicle is at a lower end.
Is a pair of left and right parallel 4 provided at an opening of the vehicle B (for example, an opening at the rear of the vehicle that is opened and closed by a rear gate).
It is composed of a rectangular link mechanism 10, a platform 20 which is raised and lowered in a horizontal state by the two link mechanisms 10, a driving device 30 for driving each link mechanism 10, a handrail device 40 attached to each link mechanism 10, and the like. The handrail device 40 can be folded and stored as shown by the imaginary line in FIG.

Each link mechanism 10 includes a bracket 11 fixed to a floor B1 of a vehicle body, and an upper arm 12 and a lower arm 13 which are mounted on the bracket 11 at its base end so as to be vertically rotatable via pins. And a stay arm 14 which is rotatably attached to the distal ends of these arms 12 and 13 via pins, respectively, and the lower end of the stay arm 14 supports the platform 20.

The platform 20 includes both stay arms 1
4 is a support plate (not shown) that is rotatably mounted via a shaft 15 and provided at the lower end of the stay arm 14.
1 is held in the state shown in FIG. 1 (horizontal state), and is rotatably assembled to this platform 21 via brackets 23 and 24 and pins 25 to be brought into the state shown in FIG. 1 (horizontal state). It consists of a rear platform 22 that is held and can be folded and stored as shown by the phantom line in FIG.

The driving device 30 has a bracket 11 at the base end.
The hydraulic cylinder 3 is rotatably connected via a pin to the distal end of the upper arm 12 via a pin and is rotatably connected via a pin to drive each link mechanism 10.
1, a hydraulic control circuit (not shown) for controlling the supply and discharge of hydraulic oil to the two hydraulic cylinders 31, and an electric control circuit (illustrated for controlling the operation of an electric hydraulic pump and an electromagnetic switching valve provided in the hydraulic control circuit. The electric hydraulic pump is driven to supply hydraulic oil to both hydraulic cylinders 31 and operate both hydraulic cylinders 31 for extension while operating the raising push button switch provided in the electric control circuit. As described above, while the lowering push button switch provided in the electric control circuit is operated, the electromagnetic switching valve is excited, the hydraulic oil is discharged from both hydraulic cylinders 31, and both hydraulic cylinders 31 contract. The platform 20 is raised by the extension operation of the two hydraulic cylinders 31, and the platform 20 is raised by the contraction operation of the two hydraulic cylinders 31.
Descends.

In this embodiment, a stopper device 50 is provided at the rear end of the platform 20 for restricting the moving body such as a wheelchair from moving backward when it is raised and lowered, and the moving body such as a wheelchair is provided at the front end of the platform 20. The stopper device 60 of the present invention for restricting the forward movement at the time of elevating is provided. Rear stopper device 50
Is a stopper plate 52 which is mounted on the rear end of the rear platform 22 via a pin 51 so as to be vertically rotatable.
And a lock pin (not shown) for fixing the stopper plate 52 at the solid line position or the virtual line position in FIG. 1, and the lock pin can be manually operated.

As shown in FIGS. 1 to 4, the front stopper device 60 includes a stopper plate 61 and a lock pin 6.
2, a first spring 63, a link 64, a second spring 65, and the like. Stopper plate 6
Reference numeral 1 denotes a pair of left and right arms 61a and a horizontally long plate 61b fixed to the ends of the arms 61a, which is rotatably mounted on the shaft 15 at the base of the arm 61a. The base of the arm 61a is formed with a recess 61a1 at one end where a lock pin 62 is fitted at one end.

The lock pin 62 is attached to the guide 26 provided in the front platform 21 so as to be movable in the front-rear direction, and is detachable at one end into a recess 61a1 of the stopper plate 61 in a standing state shown in the figure. Immediately before the platform 20 reaches the rising end as shown in FIG. 5, the first cam (the bracket is mounted on the bracket so as to be adjustable in position) as shown in FIG. At the other end, it is engaged and pushed to release the engagement with the stopper plate 61. The first spring 63 is interposed between the lock pin 67 driven into the lock pin 62 and the guide 26, and
Direction in which one end of the is engaged with the stopper plate 61 (front)
The lock pin 62 is biased.

The link 64 is fitted to the shaft 15 at the boss portion 64a and is rotatably mounted to the platform 20. The link 64 is engaged with the engaging projection 61c of the stopper plate 61 at the arm portion 64b from below. When the platform 20 reaches the rising end as shown in FIG. 5, the lock pin 62 and the first cam 66 are releasably engaged.
Prior to the engagement, the second cam 68 (integrally formed with the bracket to which the first cam 66 is attached) 68 attached to the vehicle body side with the pin portion 64c as shown in FIG. As a result, the arm 64 b is disengaged from the stopper plate 61. Second spring 65
Is connected to the platform 20 via a pin at one end and is connected to the link 64 via a wire 69 at the other end.
, And urges the link 64 in a direction in which the arm portion 64b of the link engages with the engagement projection 61c of the stopper plate.

In this embodiment constructed as described above, as shown in FIG. 1, the platform 20 is at the lower end, the handrail device 40 is in use, and the stopper plate 52 of the rear stopper device 50 is in the horizontal state. If there is
A moving body such as a wheelchair can freely get on and off between the ground G and the platform 20. At this time, in the front stopper device 60, as shown in FIGS. 1 to 4, the lock pin 62 receiving the urging force of the first spring 63 is engaged with the stopper plate 61 in the upright state, and the stopper plate 6
1 is locked so as not to move, and the stopper plate 61 is held upright. The second spring 6
5. The engagement projection 6 of the stopper plate whose movement is regulated by the arm portion 64b of the link 64 which has received the urging force of No. 5
1c is resiliently engaged from below.

In the state shown in FIG.
If the lift push button switch is operated after lifting the stopper plate 52 at 0 and fixing it at the position of the imaginary line, the electric hydraulic pump is driven, hydraulic fluid is supplied to both hydraulic cylinders 31, and both hydraulic cylinders 31 are extended. In operation, the platform 20 is raised to the position of FIG. Also at this time, in the stopper device 60 at the front, the lock pin 62 receiving the urging force of the first spring 63 is engaged with the stopper plate 61 in the upright state, and the stopper plate 61 is locked so as not to move. Since the stopper plate 61 is held in the upright state, the moving body such as the wheelchair mounted on the platform 20 is restricted from moving forward by the front stopper device 60 and is moved backward by the rear stopper device 50. Regulated.

Immediately before the platform 20 reaches the rising end shown in FIG. 5, the lock pin 62 engages with the first cam 66 mounted on the vehicle body at the other end as shown in FIG. 7 to release the engagement with the stopper plate 61. Prior to this, the link 64 engages with the second cam 68 attached to the vehicle body side and rotates by a predetermined amount as shown in FIG. Then, the arm portion 64b is disengaged from the engagement projection 61c of the stopper plate. Therefore, when the platform 20 reaches the rising end shown in FIG. 5, the stopper plate 61 is rotated by its own weight to lie down on the floor B1 of the vehicle, and is moved from the platform 20 of a moving body such as a wheelchair placed on the platform 20 to the vehicle. In addition to allowing movement into the room or movement from the vehicle interior to the platform 20, a slope is formed between the platform 20 and the floor B1 of the vehicle to facilitate movement of a moving body such as a wheelchair. After the movement of the moving object such as the wheelchair from the platform 20 into the vehicle compartment is completed, the platform 20 and the handrail device 40 can be folded and stored as shown by the imaginary line in FIG.

Further, if the lowering push button switch is operated with the moving body such as a wheelchair placed on the platform 20 shown in FIG. 5, the electromagnetic switching valve is excited and the hydraulic oil is discharged from both hydraulic cylinders 31 and both hydraulic cylinders are discharged. The hydraulic cylinder 31 contracts and the platform 20 descends from the rising end shown in FIG. 5 to the descending end shown in FIG. At this time, when the platform 20 starts to descend, the lock pin 62 and the first cam 66 and the link 64 and the second cam 68 are disengaged, and the lock pin 62 is disengaged from the first spring 6.
When the link 64 is rotated by receiving the urging force of the second spring 65 and the stopper plate 61 is lifted by the arm portion 64b of the link and reaches the standing position, the lock is locked. The pin 62 engages with the recess 61a1 of the stopper plate to lock the stopper plate 61 so as not to move. Therefore, even when the platform 20 is lowered, the moving body such as the wheelchair mounted on the platform 20 is restricted from moving forward by the stopper device 60 at the front, and is restricted from moving backward by the stopper device 50 at the rear. .

[0020]

In summary, in the stopper device (rear stopper device 60) according to the present invention, the lock is automatically released by the movement of the platform to the rising end. When the lock is released, the stopper plate is tilted by its own weight, so that even if a foot or the like is caught, there is no risk of injury and high safety is achieved. In addition, at the initial stage of the movement of the platform from the rising end to the falling end, the stopper plate is automatically tilted to the stopper position and locked, so that the operation is not forgotten and the safety is high. Further, since the stopper device according to the present invention does not include a driving device, it is simple and inexpensive, and has a low possibility of failure and high reliability.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a lift having a platform provided with a stopper device according to the present invention at a lower end.

FIG. 2 is an enlarged side view of the stopper device according to the present invention shown in FIG. 1;

FIG. 3 is a front view of the same.

FIG. 4 is a plan view of the same.

FIG. 5 is a side view of the lift with the platform shown in FIG. 1 at a raised end;

FIG. 6 is a partially cutaway side view showing a relationship between a stopper plate, a lock pin, a first cam and the like in the state of FIG. 5;

FIG. 7 is a partially broken side view showing a relationship between a link and a second cam in the state of FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Link mechanism, 20 ... Platform, 30 ... Drive device, 60 ... Front stopper device, 61 ... Stopper plate, 61c ... Engagement protrusion, 62 ... Lock pin, 63 ... 1st spring, 64 ... Link, 64b ... Arm Department, 65
.., A second spring, 66, a first cam, 68, a second cam.

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Orito 25, Ueikeike, Yoshiwara-cho, Toyota-shi, Aichi Araco Co., Ltd. (56) References JP-A-62-152937 (JP, A) JP-A-56- 138031 (JP, A) JP-A-56-47327 (JP, A) JP-A-61-109840 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60P 1/44

Claims (1)

(57) [Claims] 1. A pair of left and right parallels 4 provided in an opening of a vehicle.
A rectangular link mechanism , a platform that is raised and lowered in a horizontal state by the link mechanism, and a drive mechanism that drives the link mechanism.
That the lifting device with a drive unit, said Platform Ho undulations capable been Jikuka to the front end of the platform
Wherein at one end when the scan <br/> stopper plate to fall on the floor of the opening when the beam reaches the upper end, a set seen with being in the platform the platform is in the lifting process
The stopper plate engages with the base of the stopper plate
And a lock pin which is pushed and disengaged from the stopper plate by being engaged with a first cam provided on the vehicle body side at the other end when the platform reaches the rising end, and One end of the pin is the base of the stopper plate
A first spring for biasing the lock pin in a direction engaging the portion , and a stopper plate provided on the platform ;
Coaxially rotatably Jikuka has been based on the same stopper plate
Second cam engaged with of rotation provided on the vehicle body side when a portion downward or al engages the platform parts reaches the upper end
And the link to be disengaged from the previous Symbol stopper plate is,
<br/> stopper device constructed in accordance with a second spring for urging the same link in the direction in which the link is engaged with the base of the prior SL stopper plate.