JP3552941B2 - Vehicle lifting device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lifting frame configured to be able to move up and down in a parallel or substantially parallel posture at a descending position on or near the ground and an ascending position at or substantially at the same height as the vehicle floor, And a mounting body slidably supported by the elevating frame. The mounting body is slidably driven on a lateral edge of the mounting body. And a rail for slidably guiding the mounting body, and a slide drive pinion that meshes with the rack, and a plurality of engagements with the rail are provided on the lift frame. The present invention relates to a vehicle elevating device provided with idle wheels.
[0002]
[Prior art]
Such a vehicle elevating device, for example, while the user is sitting on a wheelchair as a mounting body, place the wheelchair on the mounting body, raise and lower the lifting frame and slide the mounting body. Is used to transfer a wheelchair from the ground side to the floor of the vehicle, and conversely, to transfer the wheelchair from the floor side of the vehicle to the ground.
[0003]
Conventionally, in a vehicle elevating device having such a configuration, a rail is provided on a lateral side edge of a mounting body, and a rack for sliding drive is positioned above the rail with respect to the mounting body. A configuration is known in which a pinion for sliding drive provided on a lifting frame is engaged with the rack (for example, see Japanese Patent Application Laid-Open No. 7-69120).
[0004]
[Problems to be solved by the invention]
However, in the above-described prior art, the rack is provided above the rail at the lateral edge of the mounting body, so that not only the rack, but also the pinion that engages with the rack is located above the rail. Therefore, there is a possibility that the user's hand or clothes may come into contact with the rack or the pinion. Since such racks and pinions are usually coated with oils such as grease for smoothing, when the user's hands or clothes come into contact, the clothes will be stained by the oils. was there.
[0005]
In order to solve such a drawback, for example, it is conceivable to position the rack and the pinion on the lateral outer side of the rail and move it away from the mounting body. However, when such a configuration is employed, the width of the mounting body is reduced by the width occupied by the rack and the pinion, and the mounting area of the mounted body may be reduced.
[0006]
The present invention solves such disadvantages of the prior art, and has as its object to reduce the width of the mounting body even further, and even if the racks and pinions are coated with oils, It is an object of the present invention to provide a vehicle elevating device in which a user's hands, clothes, and the like are less likely to be contaminated by types.
[0007]
[Means for Solving the Problems]
In order to achieve this object, according to the first aspect of the present invention, a lowered position on or near the ground and a raised position having the same or substantially the same height as the floor of the vehicle are parallel or substantially parallel. An elevating frame configured so as to be able to move up and down, and a mounting body that is configured so that the object to be mounted can be mounted and that is slidably supported with respect to the elevating frame. A rack for slidingly driving the mounting body and a rail for guiding the mounting body so as to be slidable are provided on the lateral side edges of the rack, and a sliding drive for engaging the rack with the lifting frame is provided. Pinion for, and a vehicle lift device provided with a plurality of idler wheels engaging with the rail, wherein the rail, a vertical wall portion extending in the up and down direction in the mounting body slide direction view A lower wall portion extending laterally outward from a lower portion of the vertical wall portion; Is configured with a lateral outer side extending upper wall portion from the top portion, the rack is in a state of directing the tooth surface downward, is disposed just below the rail.
[0008]
That is, since the rack is arranged immediately below the rail provided on the lateral side edge of the mounting body with the tooth surface facing downward, it is possible to arrange the rack on the lateral outer side of the rail. In addition, the arrangement of the racks does not reduce the width of the mounting body, and the rails located directly above the racks extend vertically outward from the upper and lower portions of the vertical wall portions extending in the vertical direction. The upper and lower wall portions extending laterally and outwardly prevent the user's hands and clothes from coming into contact with the rack and the pinion that engages with the rack portion. Even if racks and pinions are coated with oils such as grease, there is little risk that the oils will stain hands or clothes.
[0009]
According to the second aspect of the present invention, the rail is provided with a covering portion that hangs downward from a laterally outer portion of the upper wall portion and covers a laterally outer side of the idler wheel.
[0010]
Therefore, in addition to the upper and lower wall portions described above, the covering portion hanging down from the upper wall portion also contributes to preventing contact of clothes and the like with the rack and the pinion.
Moreover, since the covering portion hanging down from the upper wall portion reinforces the rail, the strength of the rail supported by being engaged with the idler wheel on the lifting frame side is improved, and the mounting body of the mounting frame by the lifting frame is improved. The support is stabilized, and the sliding operation of the mounting body with respect to the elevating frame can be performed smoothly.
[0011]
According to the third aspect of the present invention, the lower wall portion is provided with a concave portion having a U-shaped cross section that opens downward, and the rack is provided by being inserted into the concave portion. I have.
[0012]
Therefore, the U-shaped cross section of the U-shaped cross section contributes not only to preventing the clothes and the like from contacting the rack and the pinion, but also the rail is further reinforced by the concave section, and the strength of the rack itself is also reduced. improves.
That is, since the rack having a certain length is inserted into the U-shaped concave portion, the concave portion prevents the rack from being deformed or twisted due to the biting operation with the pinion, and The sliding operation of the mounting body by the rotational drive of the above-described structure facilitates the sliding operation of the mounting body with respect to the elevating frame by cooperating with the smoothing due to the improvement in the strength of the rail described above.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a vehicle lifting device according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vehicle lifting device is mounted on a floor F near a rear portion of a vehicle V such as a wagon equipped with an opening / closing door D that opens and closes a rear portion. An elevating table 1 as a mounting body on which a wheelchair C, which is an example of a mounting object, is mounted and raised and lowered, an elevating frame 2 holding and moving the elevating table 1 and a pair of left and right supporting the elevating frame 2 at the lower end. An arm 3, a pair of left and right parallel four-bar linkages 4 for connecting the pair of left and right arms 3 to the vehicle V side, and a pair of left and right double-acting to drive the elevator 1 by driving the left and right parallel four-bar linkages 4. A hydraulic cylinder 5 of the type is provided, and is configured to be fixed to the floor F of the vehicle V via a base frame 6 that supports the parallel four-bar linkage 4.
[0014]
Next, details of each device and members will be described. In this specification, for the sake of convenience, the forward direction of the vehicle V is referred to as forward, and the backward direction is referred to as rear. Will be explained.
Further, the members located on the left and right have substantially the same configuration, although there are differences between the left and right. Therefore, only one of the left and right will be described, and the members having different configurations on the left and right will be described each time.
[0015]
The base frame 6 is provided with base frame side brackets 7 protruding upward at both left and right ends thereof, and one ends of an upper link 8 and a lower link 9 constituting the parallel four-bar link mechanism 4 are respectively connected to the base frame side brackets 7. The other ends of the upper link 8 and the lower link 9 are pivotally connected to an arm-side bracket 10 provided at the upper end of the arm 3, respectively. The two brackets 7 and 10 constitute a parallel four-bar linkage 4, which is covered by a link cover 11.
As shown in FIG. 3, an elevating frame 2 for holding an elevating platform 1 is attached to the lower end of the arm 3, and the elevating frame 2 holds the elevating platform 1 slidably in the front-rear direction of the vehicle V. At the same time, the mounting portion between the arm 3 and the lifting frame 2 is also covered by the holding frame cover 12.
[0016]
The hydraulic cylinder 5 has its cylinder side pivotally connected to the base frame side bracket 7 so as to be relatively rotatable with respect to a pin for pivotally supporting the lower link 9, and its rod side is connected to the arm side bracket 10. The upper link 8 is pivotally connected to a pin.
Then, by expanding and contracting a pair of left and right double-acting hydraulic cylinders 5, it is constituted by a pair of left and right double-acting hydraulic cylinders 5 and a parallel four-joint link mechanism 4. As shown in FIG. 2A, the lifting frame 2 and the lifting platform 1 are moved from the rear of the vehicle V to the outside while the horizontal frame is maintained by the lifting operation means L. 2 (b), the vehicle is moved to the vehicle V side while being raised, and the floor surface F of the vehicle V is moved to the vehicle V side as shown in FIG. And an ascending / descending operation over an ascending position for ascending to approximately the same height.
[0017]
As shown in FIGS. 3 and 4, the lifting frame 2 is formed in a U-shape whose upper part is open when viewed from the rear side. A pair of front and rear slide idler rollers 13 as idler wheels that rotate around the center are respectively protruded, and an electric motor 15 for slide provided with a pinion 14 for slide drive is mounted on the left wall surface. On the right wall surface, a pair of front and rear guide idler rollers 16 that protrude inward and rotate around an axis in a vertical direction inward are provided.
The elevating table 1 held by the elevating frame 2 is formed in a rectangular shape in a plan view, and rail members 17, 18 having slightly different shapes provided with rails 17a, 18a are provided on left and right side edges thereof, In addition, slide idler rollers 19 that protrude outward and rotate around the axis in the lateral direction are protrudingly provided.
[0018]
The left and right rail members 17 and 18 provided on the lift table 1 are made of aluminum and are formed by a drawing process. As shown in FIG. And upper portions 22, 23 extending laterally outward from the upper portions of the vertical wall portions 20, 21, and the lower surfaces of the upper wall portions 22, 23 are formed into left and right rails 17a, 18a. Then, the slide idler roller 13 is engaged with the rails 17a and 18a, and the lift table 1 is slidably held on the lift frame 2.
The left and right rails 17a, 18a further include lower wall portions 24, 25 extending laterally outward from the lower portions of the vertical wall portions 20, 21 and covers hanging downward from the lateral outer portions of the upper wall portions 22, 23. Parts 26 and 27 are provided, and the left and right covering parts 26 and 27 are configured to cover the lateral outer side of the slide idler roller 13.
[0019]
That is, the left idle roller 13 is located in a space having a C-shaped cross section formed by the vertical wall portion 20, the upper wall portion 22, and the lower wall portion 24 formed on the left rail member 17. The right and left slide rollers 13 are formed by a vertical wall portion 21, an upper wall portion 23, and a lower wall portion 25 formed on the right rail member 18. The elevating table 1 is located in a space having a C-shaped cross section, and its lateral outer side is covered with a covering portion 27. The elevating table 1 is moved by a total of four sliding idle rollers 13 provided on the elevating frame 2. 2 is slidably held in the front-rear direction.
A guide idler roller 16 provided in the lift frame 2 is located in a space having a C-shaped cross section formed in the right rail member 18, and the lift table 1 rolls with respect to the lift frame 2. Is configured to be prevented.
[0020]
As shown in detail in FIG. 5, the rail member 17 on the left side of the elevating platform 1 has a U-shaped cross section that opens downward when the lower wall portion 24 is shared and is located directly below the rail 17a. And a rack 29 for sliding drive is fitted and fixed in the recess 28 with its tooth surface facing downward. That is, the concave portion 28 is provided with the upper and lower two concave grooves 30, 31 and the convex ridge 32 located between the two concave grooves 30, 31, and a pair of left and right concave grooves 30 located above. A pair of front and rear tap plates 33 are fitted therein, and the rack 29 is fitted into a pair of left and right recessed grooves 31 located below. A female screw 33a is formed in each tap plate 33, and a recess 29a opening downward and a bolt hole 29b communicating with the recess 29a are provided near both ends of the rack 29. By inserting a bolt 34 into the internal thread 29b and screwing it into the female screw 33a of the tap plate 33, the tap plate 33 and the rack 29 sandwich the ridge 32 from above and below, and the rack 29 is recessed into the rail member 17. Secured to portion 28.
[0021]
The pinion 14 is engaged with the rack 29 fixed to the left rail member 17 in this way, and the slide idler roller 19 provided on the lift 1 is driven by the forward / reverse rotation of the slide electric motor 15. By rolling on a pair of left and right rails 35 provided on the vehicle V side, the lift table 1 is configured to reciprocate in the front-rear direction with respect to the lift frame 2.
That is, as shown in FIG. 2C, the slide idler roller 19 is fitted between the rail 35 and the vibration prevention member 36 provided at the forefront of the rail 35, and The lifting platform 1 is configured to be slidable between a storage position in which the vehicle V is prevented from vibrating and a protruding position protruding outward from the vehicle V as shown in FIG. ing.
[0022]
At the front end of the lifting frame 2, a plate-shaped front receiving plate 37 is rotatably and pivotally mounted, and the storage posture becomes substantially horizontal, and the standing posture which swings upward to prevent the wheelchair C from falling. It is configured so that it can be switched to the posture.
A rear receiving plate 38 is pivotally attached to the rear end of the elevator 1 so as to be rotatable, and is erected upward to prevent the wheelchair C from falling from the elevator 1. The lifting platform 1 is in the lowered position and is lowered backward, and its free end is configured to be switched to a falling posture allowing the transfer of the wheelchair C by touching the ground G on the ground G. On the left side of the base 1, a handrail 39 is provided.
[0023]
The operation of the elevating device having such a configuration is all controlled by control means (not shown). Therefore, although not shown, it is assumed that the elevating frame 2 and the elevating table 1 are in the above-mentioned ascending position or descending position. Various sensors are provided, such as a sensor for detecting, a sensor for detecting that the elevator 1 is at the storage position or the protruding position, and a signal from the sensors is configured to be input to the control device, Further, a signal from the pendant operation tool 40 is also input.
[0024]
Next, the operation of the vehicle lifting device will be described.
In order to transfer the wheelchair C from the inside of the vehicle V to the ground G, in a state in which the lift device in the retracted state, that is, the lift frame 2 is located in the raised position and the lift platform 1 is located in the retracted position, The rear receiving plate 38 lying forward is rotated by a manual operation by manual operation to switch to the standing posture. Then, when the wheelchair C is placed on the lift 1 and the opening / closing door D at the rear is opened and the down button of the pendant-type operating tool 40 is pressed, the electric motor 15 for sliding is driven to rotate, and the rotation of the pinion 14 is started. Accordingly, the lift 1 is drawn toward the lift frame 2 by the action of the pinion 14 and the rack 29.
[0025]
In other words, the slide idler roller 19 provided on the elevator 1 rolls on the rail 35 and is drawn toward the elevator frame 2, and the slide idler roller 13 provided on the elevator frame 2 is moved by the elevator 1. And the guide idler roller 16 enters between the vertical wall portion 21 and the cover portion 27 of the right rail member 18, and engages with the rails 17 a, 18 a formed on the left and right rail members 17, 18. The lifting platform 1 reaches the protruding position held by the lifting frame 2 via the slide idler roller 13 provided on the lifting frame 2, and the front receiving plate 37 in the storage posture is rotated upward and stands up. Switch to posture.
[0026]
Next, the left and right hydraulic cylinders 5 are shortened, and the lift 4 held by the lift frame 2 is lowered while moving rearward in a substantially horizontal posture by the action of the parallel four-bar linkage 4. When the vehicle descends to the vicinity of the ground G, the descending speed is reduced, the elevator frame 2 and the elevator 1 are slowly contacted with the ground G, and the shortening operation of the hydraulic cylinder 5 is stopped.
Thereafter, the rear receiving plate 38 is rotated rearward by manual operation by manual operation to switch to the lying posture, and the caregiver pulls the wheelchair C rearward with the free end thereof grounded, or lifts the wheelchair C by itself. It is moved down to the ground G, and the transfer to the ground G is completed.
[0027]
In order to transfer the wheelchair C from the ground G into the vehicle V, the wheelchair C is placed on the elevator 1 and the receiving plate 38 is switched to the upright posture after being in the lying posture, and the pendant-type operating tool 40 is moved. Press the up button.
Then, the left and right hydraulic cylinders 5 are extended, and the lifting platform 1 held by the lifting frame 2 is raised to the raised position while moving forward in a substantially horizontal posture by the action of the parallel four-bar linkage 4. Next, the sliding electric motor 15 is driven to rotate in the direction opposite to the previous direction, and the elevator 1 at the projecting position is moved to the original storage position, and the front stopper is at the standing position. The plate 37 is rotated forward and switched to the storage position, the operation of the electric motor 15 for slide is stopped, and the transfer into the vehicle V is completed.
[0028]
[Another embodiment]
(1) FIG. 6 shows another embodiment. In this embodiment, the left rail is opened with a recess 28A slightly different in shape from the recess 28 in the previous embodiment opened. The chain 29 is formed integrally with the member 17, and a chain 29A is disposed in the recessed portion 28A. The chain 29A has a sprocket 14 which has both ends and, if necessary, an intermediate portion in addition to both ends fixed to the rail member 17 with a fixture or the like, and which acts as a pinion for sliding drive on the chain 29A. Is bite.
Also in this embodiment, with the forward / reverse rotation of the sprocket 14, the elevator 1 slides in the front-rear direction with respect to the elevator frame 2, and in addition to the chain 29A, for example, the recessed portion 28A The same applies to a case where a number of pins are arranged along the pins and a pinion or sprocket 14 for driving is engaged with the pins.
Therefore, in the present specification, the rack 29 in the previous embodiment, as well as the chain 29A in another embodiment, and the rack for slide driving, including the pins and the like, are collectively referred to.
[0029]
(2) In the embodiments described above, the example in which the racks 29 and 29A for slide driving are provided on the left edge of the mounting table 1 has been described. However, the racks 29 and 29A are provided on the right edge of the mounting table 1. Further, racks 29, 29A are provided at both left and right edges of the mounting table 1, respectively, and the pinions 14 for sliding drive provided on the left and right of the lifting frame 2 are rotationally driven in synchronization with each other. It can also be configured.
[0030]
(3) In the embodiments described above, the configuration in which the covering portion 26 is suspended downward from the lateral outer side of the upper wall portion 22 extending from the vertical wall portion 20 has been described, but the covering portion 26 is indispensable. However, the present invention can be practiced without the covering portion 26.
Further, the same applies to the recessed portions 28, 28A in which the slide driving racks 29, 29A are fitted. The recessed portions 28, 28A are eliminated, and, for example, the racks 29, 29A are attached to the lower surface of the lower wall portion 24. It can be carried out directly fixed.
[0031]
(4) In the embodiments described above, the example in which the lifting / lowering operation means L is configured by the parallel four-bar link mechanism 4 and the hydraulic cylinder 5 has been described. However, for example, a conventionally known configuration configured by using a screw rod and a nut member is used. The lifting / lowering operation means L can be replaced with a specific configuration of the lifting / lowering operation means L.
[0032]
(5) In the embodiments described above, the wheelchair C is shown as an example of the object to be mounted. However, the object to be mounted on the elevator 1 is not limited to the wheelchair C, but may be an electric appliance or furniture. And various other heavy objects.
[0033]
(6) In the embodiments described above, a wagon vehicle is shown as an example of the vehicle V, and an example in which a lifting device is mounted on the rear portion of the wagon vehicle is shown. , Buses, trucks, etc., and the mounting position is not limited to the rear part of the vehicle V, but may be mounted on the middle part of the vehicle V in the front-rear direction. May be lowered to the outside of the lateral side of the vehicle V.
[Brief description of the drawings]
FIG. 1 is a perspective view of a vehicle elevating device. FIG. 2 is a side view showing the movement of the vehicle elevating device. FIG. 3 is an exploded perspective view of an elevating frame and an elevating table of the vehicle elevating device. FIG. 5 is a sectional view showing a rail member and a rack and an exploded perspective view. FIG. 6 is a sectional view showing a rail member and a rack showing another embodiment.
REFERENCE SIGNS LIST 1 mounting body 2 elevating frame 13 idler wheel 14 pinion 17 a rail 20 vertical wall portion 22 upper wall portion 24 lower wall portion 26 covering portions 28 and 28A recessed portions 29 and 29A rack C mounted body F Vehicle floor surface G Ground V Vehicle

Claims (3)

An elevating frame configured to be able to ascend and descend in a parallel or substantially parallel posture at a descending position on or near the ground and an ascending position at the same or substantially the same height as the floor of the vehicle,
The mounted body is configured to be freely mounted, and includes a mounted body slidably supported with respect to the elevating frame,
A rack for slidingly driving the mounting body, and a rail for slidably guiding the mounting body are provided on the lateral side edge of the mounting body,
A lifting device for a vehicle, wherein the lifting frame is provided with a pinion for sliding drive meshing with the rack, and a plurality of idler wheels engaged with the rail.
The rail is a vertical wall portion extending in the up-down direction when viewed from the mounting body sliding direction, a lower wall portion extending laterally outward from a lower portion of the vertical wall portion, And an upper wall portion that extends,
A lifting device for a vehicle, wherein the rack is disposed directly below the rail with its tooth surface facing downward. 2. The vehicle elevating device according to claim 1, wherein the rail is provided with a covering portion that hangs downward from a lateral outer portion of the upper wall portion and covers a lateral outer side of the idler wheel. 3. The vehicle elevating device according to claim 2, wherein the lower wall portion is provided with a concave portion having a U-shaped cross section that opens downward, and the rack is inserted into the concave portion. .

Images