JP3047747B2 - Vehicle lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator apparatus for a vehicle having a platform which moves up and down between a loading platform and a road surface, and more particularly to an elevator apparatus for a vehicle which enables a smooth transfer of the platform onto the loading platform.

[0002]

2. Description of the Related Art A vehicle elevating device for easily loading and unloading a heavy object on a platform to be lifted and lowered on a loading platform has attracted attention.
Japanese Patent Application Laid-Open Publication No. H11-216686 proposes an elevating device in which a platform on which a heavy object is placed can be slid and stored on a carrier as it is.

In this device, a support arm is connected to a pair of left and right parallel link mechanisms provided on a loading platform, and a bracket is provided at a tip of each of the support arms which moves up and down while maintaining the same posture, and a receiving frame is attached thereto. ing. Then, at the rising end of the support arm, the receiving frame holding the guide rollers on both sides of the platform coincides with the frame rail provided on the loading platform, so that the guide rollers can be transferred to the frame rail. It is what it was.

[0004]

However, in the above-mentioned conventional apparatus, it is difficult to completely connect the receiving frame and the frame rail without any gap. Therefore, the guide roller of the platform is moved from the receiving frame to the frame rail or to the frame rail. Conversely, it was inevitable that some backlash would occur during the transfer.
This gives a feeling of discomfort particularly when a wheelchair or the like on which a person is riding is moved up and down on the carrier as it is.

Accordingly, an object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a lifting device for a vehicle that can smoothly transfer a platform to a loading platform without causing backlash.

[0006]

According to a first configuration of the present invention, a horizontal locus is maintained by a link mechanism 1A, 1B and a circular arc trajectory is formed in a vertical plane from a bed D of a vehicle to a road surface or vice versa. Platform 2 that can be drawn up and down
When, the link mechanism 1A, provided at the tip of the 1B, with respect to the entering direction of the left and right side edges of the platform 2 to the loading platform D
On the front side, from the upper side, the rear side with respect to the approach direction to the loading platform D.
And a pair of left and right guide rollers 31 and 32 for navigating the platform 2 so as to be able to move horizontally, and a front end with respect to the approach direction of the platform 2 into the carrier D.
Provided on the lower surface of the lateral position of the part, located on the loading platform D at the rising edge of the platform 2, the bed platform 2
A support roller 4 that rolls on the platform D under the load of the platform 2 with the movement of the center of gravity due to the horizontal movement into the
Is provided.

In a second configuration of the present invention, a frame body 5 is provided on the loading platform D, and guide rails 51, 53 for rolling the support rollers 4 in the front-rear direction on both side edges thereof.
And the support roller 4 has an outer peripheral surface 4a formed in an arc shape in cross section protruding outward, and the guide roller 53 of one of the guide rails 51 and 53 on which the support roller 4 rolls. 53a is connected to the outer peripheral surface 4a.
Formed on the concave surface following the

[0008]

In the above-mentioned first configuration, the platform 2 rises along an arc trajectory, and the support roller 4 provided on the lower surface is located on the loading platform D at the rising end. In this state,
When the platform 2, which is horizontally guided by the guide rollers 31 and 32 , is horizontally moved into the carrier D, the support rollers 4 located on the carrier D roll on the carrier D as they are, and The load is received as the center of gravity moves. Thus, platform D of platform 2
The transfer to the vehicle is smoothly performed without rattling, and does not cause discomfort to an occupant such as a wheelchair placed on the platform 2.

In the second configuration, the support roller having the outer peripheral surface 4a formed in an arc shape in cross section protruding outward is straightened by one of the guide rails 53 having a concave surface following the roller without swinging left and right. Will be guided.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Structure] FIG.
Shows the side view. The left side in each figure will be described later.
Right in front of the vehicle, which is the direction of approach to the platform bed,
Side matches the rear of the vehicle. In the drawing, link mechanisms 1A and 1B are provided at left and right positions in a rear opening portion of a bed D of a vehicle, and each link mechanism 1A and 1B has a base end rotatably coupled to a support piece 14 on the bed D. Parallel link 11,1
2 and a support arm 1 whose base end is connected so that the ends of these parallel links 11 and 12 are connected and whose tip is bent downward.
3.

A triangular bracket plate 15 is fixed to the tip of the support arm 13, and the bracket plate 15 is provided with guide rollers 31 and 32 at corners before and after the bottom (left and right in each drawing). . The bottom of the bracket plate 15 is inclined forward and upward (FIG. 2), so that the guide rollers 31 are arranged such that the front roller 31 is upward and the rear roller 3 is upward.
2 are respectively located below. The platform 2 is held in a horizontal posture by guide rollers 31, 32 of the bracket plate 15 provided on each of the left and right support arms 13, and is movable back and forth.

That is, both side edges of the platform 2 are formed by channel members 21 and 22 having an inverted L section facing outward, and the front guide roller 31 is provided on the upper surface of the front end horizontal wall of the channel members 21 and 22 (see FIG. 1). 3 shows one channel member 21), the rear guide roller 3
2 abuts against the lower surfaces of the horizontal walls of the front end portions of the channel members 21 and 22, respectively, sandwiches the platform 2 having a center of gravity rearward in a state where the platform 2 is drawn out and maintains the horizontal position, and also, in the front-rear direction. It is possible to move.

The parallel links 11 and 12 are connected to a drive cylinder (not shown) provided so as to connect a leading end connecting portion of one link 11 and a base end connecting portion of the other link 12 with contraction.
As shown by the chain line in FIG. During this rotation,
Since the support arm 13 maintains the initial posture, the platform 2 descends on the road surface along a circular locus in a vertical plane as shown in the figure while maintaining the horizontal posture. When the drive cylinder is extended, the parallel links 11 and 12 return to the initial standing posture, and accordingly, the platform 2 draws an arc trajectory in the vertical plane while maintaining the horizontal posture, and rises onto the loading platform D.

The details of the platform 2 are shown in FIG. The main body of the platform 2 is constituted by a panel plate 23 having an intermediate portion in the front-rear direction bent and depressed.
2 are joined. A square hole 24 is formed in the middle part of the panel plate 23 at the left and right positions, and the wheelchair V (FIG. 2)
(See Reference). Support rollers 4 are provided on the lower surfaces of the front ends of the left and right channel members 21 and 22, respectively.
(See FIGS. 3 and 4).

The left and right channel members 21 and
A handle 25 formed by bending a pipe agent in an inverted U-shape is provided on the upper surface of the rear end of each 2, and a lock release handle 26 is attached to one handle 25. An operating wire 27 extends from the unlocking handle 26, and extends from under the handle to below the channel member 22 to the front end of the platform 2, and a locking mechanism provided here and described in detail below. It is connected to the.

FIG. 5 is a plan view of the front end of the platform 2 as viewed from above, and FIG. 6 is a front view thereof. In the figure, housings 61 which open outward are provided at the left and right positions on the upper surface of the front end of the platform 2. Inside these housings 61, right-angled triangular tips are protruded by a spring urging force so as to be movable forward and backward. Locking member 62 is held. At the center of the lower surface of the platform 2, a rear end (upper side in FIG. 5) is pivotally supported, and a locking latch plate 63 held in a fixed posture by a spring material is provided. The locking member 62 and the latch plate 63 are connected to a rotating shaft 65 erected on the panel plate 23 of the platform 2 by connecting arms 641 to 645, respectively, and an operation arm 651 ( The operation wire 27 is connected to one end of FIG. 5). Thus, the operation wire 27 is
, The rotating shaft 65 rotates, and the connecting arms 641
The locking member 62 is moved backward through the hole 645, and the latch plate 63 is rotated so as to disengage with a striker described later.

FIG. 7 shows details of the locking by the locking member 62. This drawing corresponds to the portion A in FIG. 1, and the tip end of the locking member 62 is in the vicinity of the front guide roller 31 and a stopper plate protrudingly provided on the surface of the bracket plate 15 behind (to the right in the figure). 66 to prevent the platform 2 from moving forward (to the left in the figure). Platform 2
At the front end of the upper surface of the channel member 21, a cover plate 28 which is bent to cover the guide roller 31 and the stopper plate 66 is fixed by bolts 281 so as to be adjustable in the front-rear direction by a long hole. A stopper plate 29 is attached to the front end of the guide roller 31.
Is in contact with Thereby, the backward movement of the platform 2 is also restricted. Thus, while the platform 2 is fixed in the horizontal direction, as described above, the link mechanism 1 is fixed.
A, 1B allows the user to move up and down while maintaining the horizontal posture.

As shown in FIG. 1, a frame 5 having substantially the same width as the platform 2 is provided on the bed D of the vehicle. The details of the frame 5 are shown in FIG. The frame member 5 is formed by combining a frame member and a channel member vertically and horizontally to form a substantially rectangular shape, and the frame member 5 constituting the front side (left side in the figure).
A striker 55 that engages with a latch plate 63 (see FIG. 5) provided at the front end of the platform 2 described above is provided upright on the center upper surface of the platform 4. Also, cushion members 57 are provided on the left and right ends of the side surface of the frame member 56 constituting the rear side, respectively, to cushion a collision with the tip of the raised support arm 13 (see FIG. 2). Both sides of the frame body 5 are formed by channel members 51 and 52 having an inverted L cross section extending in the front-rear direction. One channel member 51 has a horizontal wall surface as a guide rail as it is, and the other channel member 52 has a horizontal wall surface. A rail member 53 having a concave arc cross section is joined to form a guide rail.

[Operation] In FIG. 2, the platform 2 which rises in a horizontal posture describes an arc trajectory, and immediately before the parallel links 11 and 12 reach their rising ends, the platform 2 passes through the uppermost point. At the rising end, the support roller 4 is slightly lowered and the support roller 4 provided on the lower surface of the front end thereof rides on the left and right guide rails 51 and 53 of the frame body 5. FIG. 3 shows a state in which the support roller 4 rides on the guide rail 53. As is known from the figure, the support roller 4 has an outer peripheral surface 4a formed in an arc-shaped cross section projecting outward, and the rail surface 53a of one of the guide rails 53 has the outer peripheral surface 4a.
Therefore, when rolling on the guide rail 53, it is guided straight without swinging left and right. In addition, when riding on the guide rail 53, the support rollers 4
Even if the position is slightly shifted in the left-right direction, the position shift is corrected by slipping so that the two arc surfaces coincide with each other.

When the lock release lever 26 provided on the handle 25 of the platform 2 is operated with the support roller 4 riding on the guide rails 51 and 53, the above-described locking member 62 is operated.
7 (see FIG. 7) retreats to release the engagement with the stopper plate 66, and the platform 2 can move forward. Therefore,
When the handle 25 is pushed forward, the platform 2 is pinched by the guide rollers 31 and 32 and moves forward, and the support roller 4 receives a load along with the forward movement of the center of gravity of the platform 2 and moves on the guide rails 51 and 53 at the front ends. Go straight on (Fig. 9). When the platform 2 reaches the forward end, the latch plate 63 (see FIG. 5) provided on the platform 2 engages the striker 55 (see FIG. 8) of the frame body 5 and
Is fixed. When the platform 2 is retracted, the lock release lever 26 of the handle 25 is operated to release the engagement between the latch plate 63 and the striker 55. When reaching the retracted end, the slope of the leading end of the locking member 62 (see FIG. 7) rides over the stopper plate 66 and engages it again.

In the above embodiment, the frame body having the guide rails is provided on the carrier, but a structure in which the support roller rolls directly on the carrier may be employed.

[0022]

As described above, according to the vehicle elevating device of the present invention, the transfer of the platform to the carrier can be performed smoothly without rattling, and it is particularly suitable for use in elevating a wheelchair or the like. It is.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a lifting device in a state where a platform is raised.

FIG. 2 is a side view of the elevating device with the platform raised.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an overall perspective view of a platform.

FIG. 5 is a plan view of a platform front end.

FIG. 6 is a front view of the front end of the platform.

FIG. 7 is an enlarged perspective view of a portion A in FIG. 1;

FIG. 8 is an overall perspective view of a frame body.

FIG. 9 is an overall side view of the platform moved to a forward end.

[Explanation of symbols]

 1A, 1B Link mechanism 2 Platform 31, 32 Guide roller 4 Support roller 4a Outer peripheral surface 5 Frame body 51, 53 Guide rail 53a Rail surface D Carrier

Claims (2)

(57) [Claims] 1. A platform which can be raised and lowered by drawing a circular locus in a vertical plane from a loading platform of a vehicle to a road surface or vice versa while maintaining a horizontal posture by a link mechanism, and provided at a tip end of the link mechanism. The left and right side edges of the platform are on the front side with respect to the direction of approach to the loading platform,
On the rear side of the approaching direction to the loading platform, pinch it from below ,
A pair of left and right guide rollers that guide the platform so that it can move horizontally, and the direction in which the platform enters the platform
The platform is provided at the left and right positions on the lower surface of the front end portion, is located on the platform at the rising end of the platform, and receives the load of the platform with the movement of the center of gravity due to the horizontal movement of the platform into the platform. And a supporting roller for rolling the vehicle. 2. A cross-section in which a frame body is provided on the carrier, and guide rails for rolling the respective support rollers in the front-rear direction are provided on both side edges thereof, and the support rollers project outward from the outer peripheral surface thereof. The vehicle elevating device according to claim 1, wherein the guide roller is formed in an arc shape, and one of the guide rails on which the support roller rolls is formed with a concave surface following the outer peripheral surface.