JP2951579B2 - lift device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for mounting and dismounting a wheelchair, a trolley or other cargo on a vehicle, and more particularly to a lifting device mounted on a rear portion of a van type car (box type vehicle). The present invention relates to an elevating device suitable for:

[0002]

2. Description of the Related Art As an elevating device of this type, a device disclosed in Japanese Utility Model Publication No. Sho 63-44272 proposed by the present applicant is conventionally known. This conventional device has a structure in which a platform is attached to a lower end portion of a side frame that is raised and lowered by a parallel link mechanism. By rotating the parallel link, the platform is moved to a landing position and a vehicle body floor surface of a van type car or the like. It can be moved up and down between the substantially coincident ascending positions.

[0003]

When the above-mentioned conventional apparatus is used for getting on and off a wheelchair, the user of the wheelchair is required to make the platform at a height substantially coincident with the floor of the body of a van type car or the like. It is indispensable to move the wheelchair from the platform outside the vehicle to the floor of the vehicle or vice versa.Because there are some steps and gaps between the platform outside the vehicle and the floor of the vehicle, There was a possibility that it would hinder the movement of a wheelchair. In addition, since it is necessary to operate a wheelchair on a platform at a raised position outside the vehicle, the user may feel uneasy about a wheelchair user.

Further, the platform is stored upright so as to cover the rear opening of the body of a van-type car or the like. In the case of loading / unloading cargo that does not require the platform to be lifted and lowered, a lifting device is provided. There was also a problem that the existence hindered the unloading work.

[0005] A first object of the present invention is to solve the above problems,
In addition to raising and lowering the platform, it can be retracted into the body of a van type car etc., improving the operability of users such as wheelchairs and trolleys, realizing smooth use of wheelchairs and trolleys, and improving safety. An object of the present invention is to provide a lifting device that can be designed.

A second object of the present invention is to provide a lifting apparatus which does not hinder loading / unloading of cargo or the like that does not use the platform when the platform is pulled in or stored.

[0007] Other objects and novel features of the present invention will be clarified in embodiments described later.

[0008]

In order to achieve the above object, a first elevating device according to the present invention comprises a main body frame fixed to a floor of a vehicle body, and a parallel link having one end pivotally connected to the main body frame. A first arm, a second arm, a stay arm pivotally connected to the other ends of the first and second arms, and a platform holder attached to a lower end of the stay arm and horizontally supported in an expanded state. A platform slidably mounted on the platform holder,
A cylinder that rotates the first or second arm to drive the platform up and down, a first roller that is pivotally attached to the platform holder to regulate the vertical position of the platform, and a horizontal position of the platform. a second roller performing position regulation direction, the platform, and lockable escape preventing mechanism in the drawer limit position, retracted limit position and at least one location or more intermediate positions relative to the platform holder, said plug
Front bogie plate connected to the front edge of the platform so as to be undulating
And the front side at the drawer limit position of the platform
And a stopper mechanism for keeping the wheel stopper plate in an upright state .

Further , the second lifting device of the present application is provided on a vehicle body floor surface.
A fixed main body frame, one end of which is pivotally connected to the main body frame;
First and second arms forming parallel links attached thereto;
Stay arm pivotally connected to the other end of the first and second arms
Attached to the lower end of the stay arm
A platform holder that is horizontally supported
Platform slidably mounted on the platform holder
By turning the platform and the first or second arm
A cylinder for driving the platform up and down;
The platform is pivotally attached to the platform holder and
A first roller for regulating the vertical position of the
A second row that regulates the horizontal position of the platform
And a slide rail fixed on the vehicle body floor surface
Along the slide rail driven by the driving means
And a trolley which moves Te, on the platform
Place the platform on the trolley in the extended position
And move the trolley to move the platform
The system is configured to perform the retracting or extracting operation of the
You.

In the second lifting device of the present invention, a front brace plate is connected to the front edge of the platform so as to be able to move up and down, and a stopper mechanism for keeping the front brace plate in an upright state at a position where the platform can be pulled out is provided. Is also good.

[0011] A detection means for detecting that the platform is at the draw-out limit position and that the front brace plate is in the upright state is further provided. It is good also as a structure which enables raising and lowering.

[0012] A rear brace plate may be connected to the rear edge of the platform so as to be able to move up and down, and the rear brace plate may be held upright by an up and down drive mechanism when the platform is not landing.

[0013]

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lifting device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the whole structure of a first embodiment according to the present invention, showing a movement of a platform from a lowered state to a raised state (pull-out state). FIG. 3 is a partial plan view of the same, FIG. 4 is a front view of the same, FIG. 5 is a side view of a retracted state of the platform, FIG. 6 is a plan view of the same, and FIG. 7 is a front view of a retracted state of the platform standing upright. is there.

In these figures, reference numeral 1 denotes a van type car (box-shaped vehicle), and a main body frame 2 is erected and fixed on a rear floor 1a close to a rear opening of a body of the van type car.
In the main body frame 2, a position near one end of a main arm 3 constituting a parallel link is pivotally connected to a pin 3 a, and one end of a sub arm 4 is pivotally connected to the pin 4 a. A stay arm 5 is pivotally connected to the other ends of the main arm 3 and the sub arm 4 by pins 3b and 4b. The lower part of the stay arm 5 is branched into two branches. As shown in FIGS. 3 and 4, the holder mounting bracket 6 is fixed to the lower end of the branch part 5a, and the platform holder 10 is fixed to the lower end of the holder mounting bracket 6 and the branch part 5b.
Vertical side plates 14a and 14b are pivotally connected by pins 19.

As shown in FIGS. 1 and 2, one end of a double-acting hydraulic cylinder 20 for driving up and down is pivotally connected to the main body frame 2 by a pin 21. The piston rod of the double-acting hydraulic cylinder 20 is connected to a pin. At 22, one end of the main arm 3 is pivotally attached. Therefore, when the double-acting hydraulic cylinder 20 is extended, the platform holder 10 is at the raised position, and when the double-acting hydraulic cylinder 20 is contracted, the platform holder 10 is at the lowered position. A power unit 25 for supplying hydraulic oil to the double-acting hydraulic cylinder 20 for elevation drive through a hydraulic circuit is attached to the main body frame 2. In addition,
The raising and lowering operations of the platform holder 10 and the platform 30 can be performed by a push button switch 26 provided on the stay arm 5 side.

A platform 30 is slidably mounted on the platform holder 10 in the front-rear direction. That is, as shown in FIGS. 8 and 9, a vertical load roller (a roller that rotates in a vertical plane) that controls the vertical position of the platform 30 and receives a vertical load applied to the platform 30 is provided on the platform holder 10. 11), 12a and 12b, and a roller 13 for preventing lateral deflection of the platform 30 (a roller rotating in a horizontal plane). Also, as shown in FIGS. 10 and 11, the platform 3
0, a guide rail 31 having a substantially U-shaped cross section in which the vertical load roller 11 slides inside, a horizontal guide member 32 of a square pipe running between the vertical load rollers 12a and 12b, A lateral vibration prevention guide member 33 that is in contact with the direction vibration prevention roller 13 and runs so as to be prevented from lateral vibration by the roller 13 is fixed to each. One roller 13 contacts the side surface of the horizontal guide member 32, and the other roller 13 contacts the guide member 33. A traveling roller 35 is pivotally mounted on the bottom surface of the platform 30 via a bracket 34. The traveling roller 35 is used to allow the platform 30 to travel when retracted on the floor 1a in the passenger compartment of the van-type vehicle 1 and to perform a smooth retracting operation and a retracting operation.

As shown in FIGS. 10 and 11, a front brace plate 40 and a rear brace plate 50 are hingedly connected to the front and rear edges of the platform 30, respectively, by hinges.

An operation plate 41 is integrally fixed to both sides of the front brace plate 40, and the tip of the front brace plate 40 in a state where the operation plate 41 is depressed by a foot or the like or by hand operation is raised. It can be operated in the upright state (car stop state). Although the details of the mechanism are omitted, the front-side stop plate 4
0 is capable of holding the upright state. Lever 4
Numeral 2 is for releasing the standing state.

As shown in FIG. 12 and FIG. 13, the rear brace plate 50 is connected to the rear edge of the platform 30 via a hinge 51 so as to be able to move up and down. A drive mechanism is provided. This up-and-down drive mechanism automatically holds down the rear brace plate 50 when the platform 30 lands, and holds the rear brace plate 50 upright in the non-landing state (lock).
It has a function to do. That is, a perforated engagement plate 52 is fixed to the rear surface near the connection end edge of the rear wheel stopper plate 50, and a substantially V-shaped engagement hole 53 is formed in the engagement plate 52. Also,
A mounting bracket 54 is formed on the rear side of the rear edge of the platform 30, and the upper end (near one vertex of the triangular shape) of an elongated triangular landing detection plate 55 is pivotally connected to the mounting bracket 54 with a pin 56. A landing roller 57 is pivotally attached to a lower end of the landing detection plate 55 (near another vertex of the triangular shape). Then, the pin 58 attached through the vicinity of the remaining apex of the triangular shape of the landing detection plate 55 is attached to the engagement plate 5.
It penetrates through two substantially V-shaped engagement holes 53.
In addition, in order to urge the rear wheel stopper plate 50 to the upright state, 2
Book torsion bars 59 and 60 are provided. That is, one end of the first torsion bar 59 is fixed to the back surface of the platform 30, and the other end is pressed against the groove of the pulley 61 fitted on the pin 58 from above. One end of the second torsion bar 60 is fixed to the back surface of the platform 30, and the other end is engaged with a hook 62 fixed to an end of the engagement plate 52 from above and pushed down. Therefore, FIG.
As shown by the solid line 2, when the platform 30 is in a non-landing state, the landing detection plate 55 is urged clockwise by the torsion bar 59 and the landing roller 57 is lowered. When the lower end of the plywood 52 is urged downward, the front end of the rear wheel stopper plate 50 is in a raised state.

As shown by the solid line in FIG.
In the state in which the pin 58 is not pushed on the ground, the pin 58 provided on the landing detection plate 55 falls into and engages with the left end locking portion (a bent portion with respect to the long inclined portion) of the substantially V-shaped engagement hole 53. Even if a force in the downward direction is applied to the rear-side stop plate 50 in the upright state, the right wall portion 53a of the left end locking portion of the substantially V-shaped engagement hole 53 rises substantially vertically, and the pin 58
Is only pushed laterally and does not act to push up the pin 58 upward. For this reason, it does not open under the load on the wheelchair side on the platform 30, and the rear-side stop plate 50 can maintain the standing state of the solid line, and the leading end is prohibited from being lowered (prevented).
Have been. When the platform 30 descends and the weight of the platform 30 acts to push the landing roller 57 on the ground, the landing detection plate 55 as shown by the imaginary line in FIG.
Is rotated counterclockwise, the pin 58 is disengaged from the left end locking portion of the substantially V-shaped engagement hole 53 and shifts rightward, and the tip of the rear wheel stopper plate 50 is lowered as shown by the phantom line in FIG. It will be in a prone state. That is, at the landing position of the platform 30, the rear-side stop plate 50 is automatically placed in a prone state, so that it is possible to move from the ground, such as a wheelchair or a trolley, onto the platform 30 or to move from the platform 30 to the ground. In addition, when the platform 30 is not in a landing state, the rear-side stop plate 50 is always kept in an upright state, and its tip is prohibited from being lowered, so that a wheelchair or a bogie is securely prevented from falling from the rear edge of the platform 30. . Platform 30
The landing roller 57 is in the lowered position because the platform holder 10 is interposed between the platform 30 and the floor even when the vehicle is on the floor of the vehicle body.
Continues to stand.

The limit position of the platform 30 to be pulled out is the stopper plate 3 of FIG. 6 provided at the end of a guide rail 31 having a substantially U-shaped cross section fixed to the back side of the platform 30.
6, the retraction limit position of the platform 30 is adjusted by another stopper means (not shown).
In addition, the front and rear stop plates 40 and 50 are defined so as to be completely drawn into the passenger compartment of the van-type vehicle 1 and not to be detached from the platform holder 10.

When the platform 30 is slid back and forth on a slope or the like to perform a pull-out or pull-in operation, there is a danger that the platform 30 will run away by its own weight. For this purpose, the escape prevention mechanism shown in FIGS. 14 and 16 is provided. That is, the platform 30 integrally has an edge plate 61 rising vertically to the side edge, and one edge plate 61 is provided with a large number of locking holes 61a. At the lower part of the stay arm 5, as shown in FIG.
1a, a lock link 63 having a lock pin 62 integrally fitted thereto is pivotally connected thereto.
4 is connected to an escape prevention solenoid 65 (escape prevention drive means) fixed to the stay arm 5 (branch portion 5b). When the solenoid 65 is extended, the lock pin 62 moves forward and can be fitted into the lock hole 61a, and when the solenoid 65 contracts, the lock pin 62 retreats and comes out of the lock hole 61a. In this case, the solenoid 65 urges the lock pin 62 in the protruding direction in the extended state when the power is not supplied. The energization to the solenoid 65 is turned on and off by a lock release proximity switch 74.

In order to release the lock by the escape prevention solenoid 65, an isosceles triangular lock release member 70 and a slide operation lever 80 for swinging the lock release member 70 through a connecting link 81 are provided. ing. The isosceles triangular lock release member 70 is provided with rollers 70a at both ends of the lower side. The upper end of the lock release member 70 is pivotally connected to the front end position of the platform 30 (the front end position of the horizontal guide member 32) by a pin 82, and the lock is locked. A long proximity switch operating member 71 is provided at a position where the release member 70 can be pressed down by the lower roller 70a. The proximity switch actuating member 71 is provided on the vehicle body floor surface 1a side over the entire moving range of the unlocking member 70 when the platform 30 is pulled out and retracted, and is connected to the L angle 72 fixed to the vehicle body floor surface 1a via a hinge 73. Attached
Lock release proximity switch 74 fixed to the L angle side
A switch operating metal piece (magnetic piece such as iron piece) 75 for operating the (detecting means) is integrated. However, when it is not pushed down by the lock release member 70, the proximity switch actuating member 7 is
1 is at the position indicated by the solid line in FIG. 16, the metal piece 75 is at a position away from the proximity switch 74, the proximity switch 74 is off, and the solenoid 65 is not energized. The slide operation lever 80 is used by the operator to pull out and retract the platform 30 by holding the slide operation lever 80. The slide operation lever 80 is provided at the rear end position of the platform 30 (horizontal guide member 3).
2 at the rear end position).
It is pivoted at.

The slide operation lever 80 is normally kept at a neutral position by a spring,
When the operator tilts the slide operation lever 80 forward or backward for retraction or withdrawal, the isosceles triangular unlocking member 70 swings, and the rollers 70a at both ends of the lower side of the unlocking member 70 are rotated. In either case, the proximity switch actuating member 71 on the floor side is pushed to be in the state of the imaginary line in FIG. 16, and the metal piece 75 integral therewith closely approaches the unlocking proximity switch 74. As a result, the proximity switch 74 is turned on, the solenoid 65 is energized, the lock pin 62 is disengaged from the lock hole 61a (the virtual line state in FIG. 16), and the slide operation lever 80 is turned on.
Then, the platform 30 is slid with respect to the platform holder 10 to be pulled in, and the pull-out operation can be executed. It should be noted that the lock pin 62 fits into the lock hole 61a at the right end P1 in FIG. 14 at the drawer limit position of the platform 30, and the lock pin 62 fits into the lock hole 61a at the left end P2 at the draw limit position. However, when there is a risk of escape when operating the platform on an inclined ground or the like, the slide operation lever 80 is returned to the neutral position so that the lock pin 62 is fitted into the lock hole 61a at the nearest intermediate position. The movement of the platform 30 can be stopped once, thereby ensuring operational safety.

If the platform 30 is not at the drawer limit position with respect to the platform holder 10, there is a danger that the front brace plate 40 will interfere with (catch with) the vehicle bumper. Since it is necessary to be upright in order to prevent the fall, the detection means as shown in FIGS. 15 and 16 is used for detecting that the platform 30 is at the draw-out limit position and the front brace plate 40 is in the upright state. The proximity switch 90 for preventing sliding at the time of elevating is fixed to the stay arm 5 (branch portion 5b) side. The proximity switch 90 for preventing sliding at the time of elevating and lowering moves when a switch operating metal piece (a magnetic piece such as an iron piece) 91 fixed to an operation plate 41 integrated with the front-side car stop plate 40 comes close to and closes (the platform is in a drawer limit position). (In the state shown in FIG. 15 in which the front-side stop plate is in the upright state) and the hydraulic circuit is controlled so that the double-acting hydraulic cylinder 20 for elevation drive can be operated. When the platform 30 is not in the drawer limit position or when the front brace plate 40 is not in the upright state, the switch actuating metal piece 91 does not approach the sliding prevention proximity switch 90 when ascending and descending. 90 is off, and the double-acting hydraulic cylinder 20 for driving up and down cannot be operated. This prevents a device failure or danger from occurring due to an erroneous operation.

Further, in order to ensure safety, the front-side stop plate 40 needs to be maintained (locked) in an upright state when the platform 30 is moved up and down. For this reason, as shown in FIG. Stopper mechanism 100 that keeps front brace plate 40 in the upright position at the limit position
Is provided. The stopper mechanism 100 is an inverted L-shaped stopper rod 102 fixed to the vertical side plate 14 b of the platform holder 10, and is closely opposed to a plate 103 fixed to the upper side of the operation plate 41 integrated with the front wheel stopper plate 40. The downward movement of the front end of the front stop plate 40 is prevented by pressing the upper surface of the plate member 103.

The platform holder 10 and the platform 30 can be manually operated from the horizontal state of the imaginary line in FIG. 7 to the storage state of the vertical line in the solid line in FIG. 7 when the platform 30 is at the retraction limit position. Then, the platform holder 10 and the platform 30
14 uses its own weight, a holder lock mechanism 110 shown in FIG. 14 is provided so that the platform holder 10 and the platform 30 do not tilt at the time of landing. That is, the platform holder 10
The holder horizontal locking hole 111 is formed in the vertical side plate 14a of the
12 is urged in the projecting direction by a compression spring 114 through a mounting bracket 113 fixed to the stay arm 5 (branch 5a). A lock release lever 115 for retreating the holder lock pin 112 to release the lock is pivotally attached to a mounting plate 116 fixed to the stay arm 5 (branch portion 5a) by a pin 117.
Is engaged between a stop ring 118 fixed to the holder lock pin 112 and an intermediate ring 119 fitted to the holder lock pin 112 and contacting one end of the compression spring 114. By rotating the lock release lever 115 as indicated by the imaginary line in FIG.
The lock between the and the platform holder 10 can be released.

After the platform 30 is set at the retraction limit position with respect to the platform holder 10, it can be stored vertically from the horizontal state of the virtual line in FIG. 7 to the solid line in the same figure. A side upright lock mechanism 120 of the platform is provided as shown in FIGS. That is, the eyebolt 121 as a locking member is fixed to the upper end surface of the stay arm 5, and as shown in FIG.
A lock fitting 130 having 31 is connected to a side end of the platform 30 via a hinge 132. When the platform holder 10 and the platform 30 are stowed sideways, the lock fitting 130 is turned over as shown by the imaginary line in FIG.
31 is locked so that the platform holder 10 and the platform 30 do not expand horizontally.

Next, the overall operation of the first embodiment will be described.

First, as shown in FIG.
In the case where the platform holder 10 and the platform 30 are stored in an upright state as in the above, the lock fitting 130 of the side upright lock mechanism 120 of the platform is removed from the eyebolt 121 to enable use of the elevating device. The platform holder 10 and the platform 30 are deployed horizontally. When the platform holder 10 is unfolded horizontally, the holder lock pin 112 of the holder lock mechanism 110 in FIG. 14 is fitted into the horizontal lock hole 111 on the platform holder 10 side, and the platform holder 10 is horizontally locked to the stay arm 5. Is done. At this time, the front wheel stop plate 40 is once set to a state in which the wheelchair or the like in the vehicle interior is set to the platform
0 can be transferred. At this time, since the rear-side stop plate 50 has a sufficient clearance between the platform 30 and the vehicle body floor 1a to keep the landing roller 57 lowered, the rear-side stop plate 50 is locked in the upright state, Fall is prevented.

Then, before the platform 30 is pulled out, the front brace plate 40 is set in an upright state, and then, as shown in FIGS. 5 and 6, the platform 30 at the retracted position is raised to the rear end position. With the slide operation lever 80 thus pulled out, the slide operation lever 80 is pulled out to the drawable limit position in FIGS. At this time, by pulling and tilting the slide operation lever 80 toward the operator, the lock pin 62 in FIG. 16 is disengaged from the lock hole 61a at the left end position P2 in FIG. 14 corresponding to the retraction limit position on the platform 30 side. The platform 30 can be manually pulled out by sliding on the platform holder 10 to the drawing limit position. After the drawer is completed, by releasing the slide operation lever 80, the slide operation lever 80 returns to the neutral position, and the lock pin 62 fits into the lock hole 61a at the right end position P1 in FIG. At this time, the platform 30 is locked at the drawer limit position with respect to the platform holder 10.
Note that, since the front-side stop plate 40 is in the upright state before the platform 30 is pulled out, the operation of the operation plate 41 is prevented by the inverted L-shaped stopper rod 102 of the stopper mechanism 100 as shown in FIG. By setting to this state, the proximity switch 9 for preventing sliding at the time of ascending and descending
When the switch operating metal piece 91 approaches and approaches 0, the slide prevention proximity switch 90 at the time of elevating and lowering is turned on, and the double-acting hydraulic cylinder 20 for elevating and lowering becomes operable.

As shown in the solid line of FIG. 1 and FIG. 2, the lifting / lowering double-acting hydraulic cylinder 20 is actuated (compressed) from the drawing-out limit position of the platform 30, and the main arm 3 and the sub-arm 4 are turned to rotate the platform 30. Is lowered from the rear edge position of the vehicle body floor surface to the landing state. At this time, the front wheel stop plate 40 is locked in the upright state by the stopper mechanism 100, and the rear wheel stop plate 50 is also locked in the upright state. Therefore, the wheelchair C shown by a virtual line in FIGS.
The fall of H or the like can be reliably prevented.

When the platform 30 is completely landed as shown by the imaginary line in FIG. 1, the lower end of the landing detection plate 55 is lifted by the landing roller 57 of FIG. Rear wheel stop plate 50
Is turned down, and the wheelchair CH or the like can be moved to the ground.

Conversely, when a wheelchair or the like on the ground is to be loaded in the van-type vehicle 1, as shown by an imaginary line in FIG. The platform 30 is raised to the upper limit position by operating (extending) the double-acting hydraulic cylinder 20 for driving up and down (in a position where the platform holder 10 indicated by the solid line in FIG. 1 is placed on the floor surface 1a). Move to.).

Next, as shown in FIGS. 2 to 4, the platform 30 which is in the drawing limit position is pushed out to the drawing limit position with the slide operation lever 80 standing upright at the rear end position. At this time, the slide operation lever 8
When the lock pin 62 of FIG. 16 is disengaged from the lock hole 61a at the right end position P1 of FIG. 14 corresponding to the drawing limit position on the platform 30 side by pushing 0 and tilting forward of the operator, it slides on the platform holder 10. Thus, the platform 30 can be manually retracted to the retraction limit position. After the retraction is completed, when the slide operation lever 80 is released, the slide operation lever 80 returns to the neutral position, and the lock pin 62 fits into the lock hole 61a at the left end position P2 in FIG. 14 corresponding to the retraction limit position on the platform 30 side. Then, the platform 30 is locked in the retracted position with respect to the platform holder 10.

After the platform 30 is brought into the retraction limit position as shown in FIG. 5, the wheelchair CH and the like are moved to the floor surface 1a with the front side brace plate 40 being turned down.

The front brace plate 40 is locked in the upright state by the stopper mechanism 100 shown in FIG. 15 except when it is in the retracted state, and the rear brace plate 50 is locked except when the platform 30 is landing. Since the vehicle is locked in the upright state, falling of the wheelchair CH or the like can be reliably prevented.

According to the first embodiment, the following effects can be obtained.

(1) The platform 30 can be retracted into the vehicle body as well as raised and lowered, so that the operability of the user such as a wheelchair or a trolley can be improved, the smooth use of the wheelchair or the trolley can be realized, and the safety can be improved. Improvement can be achieved. That is, there is no need to perform a wheelchair operation on the platform when the vehicle is at the ascending position outside the vehicle body, and the wheelchair user does not feel uneasy.

(2) When the platform 30 is in the retracted state, or when the platform holder 10 and the platform 30 are further rotated by 90 degrees to be in the retracted state shown in FIG. Unloading work for undesired cargo can be carried out smoothly, and the presence of platforms etc. does not hinder the loading and unloading of other cargo.

(3) The platform holder 10 includes longitudinal load rollers 11, 12a and 12b for regulating the vertical position of the platform 30, and the platform 30.
And a horizontal anti-sway roller 13 for restricting the position in the horizontal direction, so that the platform 30 can be smoothly pulled out and pulled in.

(4) An escape prevention mechanism is provided which can lock the platform 30 with respect to the platform holder 10 at the draw-out limit position, the draw-in limit position, and at a plurality of intermediate positions, so that the platform 30 can be manually operated on a slope or the like. Pull-out and pull-in operations can be performed safely.

(5) A front wheel stopper plate 40 is connected to the front edge of the platform 30 so as to be able to move up and down, and a stopper mechanism 100 for keeping the front wheel stopper plate 40 in an upright state at a position where the platform 30 can be pulled out is provided. For this reason, the front-side stop plate 40 is always locked in an upright state at the position where the platform 30 can be pulled out, including when the platform 30 is raised and lowered. Further, the rear-side stop plate 50 is always locked in the upright state by the up / down drive mechanism when the platform 30 is not in a landing state. For this reason, a fall accident of a wheelchair, a trolley, etc. can be reliably prevented, and safety can be sufficiently ensured.

(6) An ascending / descending proximity switch 90 is provided as a detecting means for detecting that the platform 30 is in the drawing-out limit position and the front-side stop plate 40 is in the upright state. The platform 30 can be moved up and down only when the front-side stop plate 40 is in the upright state, thereby preventing damage to the device due to erroneous operation and occurrence of an accident.

(7) The platform holder 10 is configured to be locked to the stay arm 5 by the holder lock mechanism 110 when the platform holder 10 is unfolded horizontally.
It is possible to prevent one side from lifting.

FIG. 18 shows a second embodiment of the present invention. In this case, the slide operation lever 80 is fixed to the platform 30 side, and a push button switch 140 is provided on the slide operation lever 80.
By pressing the 40, the run-off prevention solenoid 65 is energized to remove the lock pin 62 from the lock hole 61a. Cooperation between the push button switch 140 and the run-out preventing solenoid 65 is performed by a wired system (for example, using a flexible wire) or a wireless system (such as an infrared remote controller).
Any of these may be used.

The other structure of the second embodiment is the same as that of the first embodiment.

In the case of the second embodiment shown in FIG.
There is an advantage that the mechanical structure for operating the runaway prevention solenoid 65 is simplified.

FIGS. 19 to 21 show a third embodiment of the present invention. In these figures, a slide rail 150 is fixed on a vehicle body floor 1a of a van type vehicle 1 along a movement path of a side edge of a platform 30, and a trolley 160 is slidably provided on the slide rail 150. Have been. The trolley 160 is provided with a runner 162 rotatably mounted with a roller 161 running on the slide rail 150 as shown in FIGS. 20 and 21, and is arranged so as to slide on the upper surface of the slide rail 150. A mounting plate 163 connected and fixed to the runner 162 through a side slit is provided.

The trolley 160 is connected to the slide rail 15
As shown in FIG. 19, a ball screw shaft 151 is supported in parallel with the slide rail 150 by a bearing 152 fixed to the slide rail 150 so that the ball screw nut can be moved along the ball screw nut 151. 153 is fixed to the trolley 160 (runner 162) side. Then, the ball screw shaft 151 is connected to the sprocket 15
5, 156 and a motor 154 which is driven to rotate via a chain 157 by a transmission mechanism.
It is attached to the side.

In the case of the third embodiment, the escape prevention mechanism using the escape prevention solenoid 65 of FIGS. 14 to 16 employed in the first embodiment becomes unnecessary, but the configuration of other parts Can employ the same mechanism as in the first embodiment.

In the third embodiment, utilizing the fact that the final position of the raising operation of the platform 30 is a position several millimeters down after passing through the upper dead center position, the platform 30 is moved up and down by the double-acting hydraulic pressure. When the cylinder is driven to the raised position, the front end portion of the platform 30 can be placed on the trolley 160 as shown in FIG. Then, by rotating the ball screw shaft 151 with the electric motor 154, the ball screw nut 153 and the trolley 160 moving integrally therewith can be moved in the platform retraction direction along the slide rail 150. Also, by reversing the electric motor 154, the platform 30 in the retracted state can be shifted to the extended state. That is, the movement of the platform 30 between the drawing limit position and the drawing limit position can be automated.

It is also possible to employ a mechanism for automatically raising and lowering the front-side stop plate 40 just before the platform 30 reaches the retraction limit position.

Although the embodiments of the present invention have been described above, it is obvious to those skilled in the art that the present invention is not limited to the embodiments and various modifications and changes can be made within the scope of the claims. There will be.

[0057]

As described above, according to the elevating device according to the present invention, it is possible not only to raise and lower the platform, but also to retract the platform into the body of a van-type car or the like.
The operability of the user of the trolley or the like can be improved, the smooth use of the wheelchair, the trolley, or the like can be realized, and the safety can be improved. In particular, since it is not necessary to operate the wheelchair on the platform when the vehicle is at the ascending position outside the vehicle body, the user does not feel uneasy.

When the platform is retracted, or the platform holder and the platform are stored upright at the lateral position inside the vehicle body, loading and unloading of cargo and the like without using the platform can be performed smoothly. Does not hinder the loading and unloading of other cargo.

Further, the platform holder is provided with a first roller for regulating the vertical position of the platform,
A second roller for regulating the horizontal position of the platform, and
An escape prevention mechanism that can be locked to the platform holder at a drawing limit position, a drawing limit position, and at least one or more intermediate positions ;
A front brace plate connected to the front edge of the
At the position where the platform can be pulled out, the front brace plate
By providing the stopper mechanism that keeps the platform in the upright state , the platform can be smoothly and safely pulled out and pulled in and raised and lowered , and operability and safety can be improved. Further, when the trolley is configured to move along the slide rail on the floor of the vehicle body driven by the driving means, the platform is placed on the trolley at the ascending limit position of the platform,
By moving the trolley, the platform is retracted or pulled out, so that the platform can be automatically pulled out and retracted.

[Brief description of the drawings]

FIG. 1 is a side view showing an overall configuration of a first embodiment of a lifting device according to the present invention, showing a lifting operation of a platform.

FIG. 2 is a side view when the platform is in a raised position (a drawable limit position).

FIG. 3 is a partial plan view of the same.

FIG. 4 is a front view of the same seen from the rear side of the vehicle body.

FIG. 5 is a side view of the first embodiment with the platform in a retraction limit position.

FIG. 6 is a plan view of the same.

FIG. 7 is a front view showing a state in which the platform holder and the platform are stored upright in the first embodiment.

FIG. 8 is a front view of a platform holder used in the first embodiment.

FIG. 9 is a plan view of the same.

FIG. 10 is a side view of a platform used in the first embodiment.

FIG. 11 is a front view of a platform used in the first embodiment.

FIG. 12 is a partially enlarged side view showing a rear wheel stopper plate and a mechanical part attached thereto in the first embodiment.

FIG. 13 is a partially enlarged bottom view of the same.

FIG. 14 is a side view showing the escape prevention mechanism according to the first embodiment.

FIG. 15 is an enlarged side view of the same.

FIG. 16 is an enlarged front view of the same part.

FIG. 17 is a partially enlarged plan view showing a side upright lock mechanism of the platform according to the first embodiment.

FIG. 18 is a side view of the second embodiment of the present invention.

FIG. 19 is a plan view of a third embodiment of the present invention.

FIG. 20 is a side view of the main part.

FIG. 21 is an enlarged sectional view of the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Van type vehicle 1a Body floor 2 Body frame 3 Main arm 4 Subarm 5 Stay arm 6 Holder mounting bracket 10 Platform holder 11, 12a, 12b Roller for vertical load 13 Roller for horizontal runout prevention 20 Double-acting hydraulic for vertical drive Cylinder 30 Platform 31 Guide rails 32 and 33 Guide member 34 Bracket 35 Traveling roller 40 Front wheel stop plate 41 Operation plate 50 Rear wheel stop plate 52 Perforated engagement plate 53 Substantially V-shaped engagement hole 55 Landing detection plate 57 Landing roller 59 , 60 Torsion bar 61 Edge plate 61a Lock hole 62 Lock pin 63 Lock link 65 Escape prevention solenoid 70 Lock release member 71 Proximity switch actuating member 74 Lock release proximity switch 80 Slide operation lever 90 Slide prevention during vertical movement Stop proximity switch 100 Stopper mechanism 102 Reverse L-shaped stopper rod 110 Holder lock mechanism 111 Horizontal lock hole 112 Holder lock pin 120 Side upright lock mechanism 140 Push button switch 150 Slide rail 160 Trolley

Continuation of front page (56) References JP-A-4-334630 (JP, A) JP-A-4-55134 (JP, A) JP-A-4-55135 (JP, A) JP-A-7-215120 (JP) , A) Registered utility model 3023975 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60P 1/43 B60P 1/44 B60P 1/46 A61G 3/00

Claims (5)

(57) [Claims] 1. A body frame fixed to a vehicle body floor,
First and second arms forming parallel links having one end pivotally attached to the main body frame, a stay arm pivotally attached to the other ends of the first and second arms, and a lower end attached to the stay arm A platform holder that is horizontally supported in a deployed state, a platform slidably mounted on the platform holder, and a cylinder that rotates the first or second arm to drive the platform up and down A first roller pivotally attached to the platform holder for regulating the vertical position of the platform and a second roller for regulating the horizontal position of the platform, and the platform is attached to the platform holder. On the other hand, it can be locked at the drawer limit position, the draw limit position and at least one or more intermediate positions. And prevention mechanism, the platform
A front brace plate connected to the front edge of the
At the drawer limit position of the platform,
An elevating device comprising: a stopper mechanism for maintaining a standing state . 2. A body frame fixed to a vehicle body floor,
First and second arms forming parallel links having one end pivotally attached to the main body frame, a stay arm pivotally attached to the other ends of the first and second arms, and a lower end attached to the stay arm A platform holder that is horizontally supported in a deployed state, a platform slidably mounted on the platform holder, and a cylinder that rotates the first or second arm to drive the platform up and down A first roller that is pivotally attached to the platform holder and controls a vertical position of the platform, and a second roller that controls a horizontal position of the platform, and is fixed on the vehicle body floor. A slide rail, and a trolley driven by driving means and moved along the slide rail. A lifting / lowering device, wherein the platform is placed on the trolley at a position where the platform can be ascended, and the trolley is moved to perform a retracting or pulling operation of the platform. Wherein said and front wheel stopper plate is connected freely undulating front edge of the platform, the front wheel stop plate section according stopper mechanism to keep standing state is provided two at the drawer limit position of the platform The lifting device as described. 4. A detecting means for detecting that the platform is at the draw-out limit position and that the front brace plate is in the upright state, wherein the detection means is provided only when the front brace plate is in the upright state at the draw-out limit position of the platform. The lifting device according to claim 1 or 3, wherein the platform can be raised and lowered. 5. A rear-side stop plate is connected to a rear edge of the platform so as to be able to move up and down, and the rear-side stop plate is held in an upright state by an up-and-down drive mechanism in a non-landing state of the platform. 5. The lifting device according to 1, 2, 3, or 4.