JPH09123822A - Rising and lowering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability of a wheelchair, a truck, etc., by a user, and to realize the smooth use of the wheelchair, the truck, etc., so as to improve safety, by not only raising and lowering a platform but also drawing the platform inside a vehicle body such as a van-type vehicle. SOLUTION: A rising and lowering device is provided with a platform holder 10 attached to the lower end of a stay arm 5 to be raised and lowered by a parallel link mechanism, and a platform 30 so attached as to be freely slid in relation to the platform holder 10, and the platform holder 10 is provided with a first roller for regulating the vertical position of the platform 30, and a second roller for regulating the horizontal position of the platform.

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 device that does not hinder loading and unloading of cargoes that do not use the platform when the platform is retracted 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, the lifting device of the present invention comprises a body frame fixed to the floor surface of a vehicle body and a parallel link having one end pivotally attached to the body frame. First and second arms, a stay arm pivotally attached to the other end of the first and second arms, a platform holder attached to the lower end of the stay arm and horizontally supported in a deployed state, The platform holder includes a platform slidably attached to the platform holder, and a cylinder for rotating the first or second arm to drive the platform up and down. The platform holder is a vertical position of the platform. It is configured to have a first roller that regulates and a second roller that regulates the horizontal position of the platform.

Further, it is also possible to provide a escape prevention mechanism capable of locking the platform with respect to the platform holder at a pull-out limit position, a pull-in limit position and at least one intermediate position.

Further, a front wheel stop plate may be 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 wheel stop plate in an upright state at the draw-out limit position of the platform may be provided.

A detection means is further provided for detecting that the platform is in the withdrawal limit position and the front car stop plate is in the upright state, and the platform is provided only when the front car stop plate is in the upright state at the platform withdrawal limit position. The configuration may be such that it can be moved up and down.

A rear car stop plate may be connected to a rear edge of the platform so as to be able to rise and fall, and the rear car stop plate may be held in an upright state by a hoisting drive mechanism in a non-landing state of the platform.

A slide rail fixed on the floor surface of the vehicle body and a trolley driven by driving means to move along the slide rail are further provided, and the platform is mounted on the trolley at the upper limit position of the platform. It is also possible to adopt a configuration in which the platform is retracted and the trolley is moved to retract or withdraw the platform.

[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 movement of the platform from a lowered state to a raised state (pulled out state), and FIG. 2 is a platform raised state, showing the overall construction of the first embodiment of the present invention. Side view, FIG. 3 is the same partial plan view, FIG. 4 is the same front view, FIG. 5 is a side view of the platform retracted state, FIG. 6 is the same plan view, and FIG. 7 is a front view of the retracted state in which the platform is vertically erected. is there.

In these drawings, reference numeral 1 denotes a van type vehicle (box type vehicle), and a main body frame 2 is erected and fixed on a rear floor surface 1a near a rear opening of a vehicle body of the van type vehicle.
A pin 3a is pivotally attached to the body frame 2 at a position near one end of a main arm 3 forming a parallel link, and a pin 4a is pivotally attached to one end of the sub arm 4. 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.
The vertical side plates 14a and 14b are pivotally attached by pins 19.

As shown in FIGS. 1 and 2, one end of a double-acting hydraulic cylinder 20 for raising and lowering is pivotally attached to the body frame 2 by a pin 21, and a piston rod of the double-acting hydraulic cylinder 20 is pinned. 22 is pivotally attached to one end of the main arm 3. Therefore, when the double-acting hydraulic cylinder 20 is extended, the platform holder 10 is in the raised position, and when the double-acting hydraulic cylinder 20 is in the contracted state, the platform holder 10 is in the lowered position. A power unit 25 for supplying hydraulic oil to the double-acting hydraulic cylinder 20 for lifting drive is attached to the main body frame 2 through a hydraulic circuit. In addition,
Ascending and descending 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 mounted on the platform holder 10 so as to be slidable in the front-rear direction. That is, as shown in FIGS. 8 to 9, the platform holder 10 regulates the vertical position of the platform 30 and receives a vertical load applied to the platform 30. A vertical load roller (a roller that rotates in a vertical plane). ) 11, 12a, 12b and a lateral shake-preventing roller (roller rotating in a horizontal plane) 13 of the platform 30 are pivotally mounted. In addition, as shown in FIGS. 10 and 11, the platform 3
On the bottom side of 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 shake preventing guide member 33, which is regulated so as not to laterally shake by the roller 13 while traveling in contact with the direction shake preventing roller 13, is fixed thereto. 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 configured to travel when the platform 30 retracts on the floor surface 1a in the passenger compartment of the van 1 so as to perform a smooth retracting and retracting operation.

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

An operation plate 41 is integrally fixed to both sides of the front car stop plate 40, and the front end of the front car stop plate 40 in a state in which the operation plate 41 is stepped down with a foot or the like is raised. It can be operated in the standing state (car stop state). Although the details of the mechanism are omitted, the front vehicle stop plate 4
0 can hold the standing state. Lever 4
2 is for canceling the standing state.

As shown in FIGS. 12 and 13, the rear vehicle stop plate 50 is movably connected to the rear edge of the platform 30 via a hinge 51. The rear vehicle stop plate 50 is lifted to drive the rear vehicle stop plate 50 up and down. A drive mechanism is provided. This up-and-down drive mechanism automatically keeps the rear vehicle stop plate 50 down when the platform 30 lands, and holds (locks) the rear vehicle stop plate 50 upright in the non-landing state.
It has a function to do. That is, the perforated engagement plate 52 is fixed to the rear surface of the rear vehicle stop plate 50 in the vicinity of the connecting edge, and the engagement plate 52 is formed with a substantially V-shaped engagement hole 53. Also,
A mounting metal fitting 54 is formed on the rear side of the rear edge of the platform 30, and an upper end (near one apex of the triangular shape) of an elongated triangular landing detection plate 55 is pivotally mounted to the mounting metal fitting 54. 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 to penetrate through the vicinity of the remaining triangular-shaped vertices of the landing detection plate 55 is attached to the engagement plate 5.
The second substantially V-shaped engaging hole 53 is penetrated.
In addition, in order to urge the rear vehicle stop 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 of the first torsion bar 59 abuts and presses against the groove of the pulley 61 fitted in the pin 58. 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 hooking metal fitting 62 fixed to the end of the engaging plate 52 from above and pushed down. Therefore, FIG.
As indicated by the solid line 2 in FIG. 2, when the platform 30 is not landed, the landing detection plate 55 is biased clockwise by the torsion bar 59 and the landing roller 57 is lowered, and the landing detection plate 55 is opened by the torsion bar 60. The lower end of the rear vehicle stop plate 50 is raised by urging the lower end of the plywood 52 downward.

As shown by the solid line in FIG. 12, the landing roller 57
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 a long inclined portion) of the substantially dog-legged engagement hole 53. Therefore, even if a force in the downward direction is applied to the rear vehicle stop plate 50 in the upright state, the right wall portion 53a of the left end locking portion of the substantially dog-legged engagement hole 53 rises substantially vertically, and the pin 58
, But does not act to push the pin 58 upward. Therefore, the wheel load on the platform 30 does not open, and the rear wheel stop plate 50 can maintain the standing state of the solid line, and the lowering of the tip is prohibited (prevention).
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 phantom line in FIG.
Rotates counterclockwise, the pin 58 disengages from the left end locking portion of the substantially dog-legged engaging hole 53 and moves to the right, and the tip of the rear wheel stop plate 50 descends 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 vehicle stop plate 50 is automatically laid down so that it is possible to move from the ground such as a wheelchair or a trolley onto the platform 30 or from the platform 30 to the ground. Further, in the non-landing state of the platform 30, the rear vehicle stop plate 50 is always held in the upright state, and the tip of the rear vehicle stop plate is forbidden to drop, which reliably prevents the wheelchair or the trolley from falling from the rear edge of the platform 30. . Platform 30
Since the platform holder 10 is interposed between the platform 30 and the floor surface even when the vehicle is on the floor surface of the vehicle body, the landing roller 57 is in the lowered position, and the rear vehicle stop plate 50
Continues to stand.

The limit position for drawing out the platform 30 is the stopper plate 3 shown in FIG. 6 provided at the end of the guide rail 31 fixed to the back side of the platform 30 and having a substantially U-shaped cross section.
6 and the retracting limit position of the platform 30 is determined by another stopper means (not shown).
The front and rear car stop plates 40 and 50 are defined so as to be completely drawn into the passenger compartment of the van 1 and not to be disengaged from the platform holder 10.

When the platform 30 is slid back and forth on a sloping ground to perform the pulling-out or pulling-in operation, there is a risk that the platform 30 may escape due to its own weight. Therefore, the escape prevention mechanism shown in FIGS. 14 and 16 is provided. That is, the platform 30 integrally has an edge plate 61 which is vertically raised at 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.
A lock link 63 that integrally has a lock pin 62 that fits in the la 1a is pivotally mounted.
A escape prevention solenoid 65 (departure prevention drive means) fixed to the stay arm 5 (branch portion 5b) is connected via the control unit 4. When the solenoid 65 extends, 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 moves backward and comes out of the lock hole 61a. In this case, the solenoid 65 biases the lock pin 62 in the extending direction when the solenoid 65 is not energized. The energization of the solenoid 65 is turned on and off by the 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 via a connecting link 81 are provided. ing. The isosceles triangle-shaped unlocking member 70 is provided with rollers 70a at both ends of the lower side, and the upper end is pivotally attached 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 thereof is provided. A long proximity switch operating member 71 is arranged at a position where the lower roller 70a of the releasing member 70 can be pushed down. The proximity switch actuating member 71 is provided on the vehicle body floor surface 1a side over the entire range of movement of the lock releasing member 70 associated with pulling out and retracting the platform 30, and an L angle 72 fixed to the vehicle body floor surface 1a is provided with a hinge 73. Installed,
Proximity switch 74 for lock release fixed to L angle side
A switch operating metal piece (a magnetic piece such as an iron piece) 75 for operating the (detection means) is integrated. However, when it is not pushed down by the unlocking member 70, the proximity switch operating member 7 is operated by spring means (not shown).
16, the metal piece 75 is located 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 pull in the platform 30, and the rear end position of the platform 30 (the horizontal guide member 3
2 to the rear end position) and the pin 84 to the mounting bracket 83 fixed.
It is pivoted at.

The slide operating lever 80 is normally held in a neutral position by a spring, but the platform 30
When the operator tilts the slide operation lever 80 forward or backward to pull in or pull out the lock release member 70, the isosceles triangular lock release member 70 swings, and the rollers 70a at both ends of the lower side of the lock release member 70 move. Either one of them pushes the proximity switch actuating member 71 on the floor surface into the phantom line state of FIG. 16, and the metal piece 75 integrated therewith closely faces 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 (state of virtual line in FIG. 16), and the slide operation lever 80
Thus, the platform 30 can be slid with respect to the platform holder 10 to be pulled in, and the pull-out operation can be executed. The lock pin 62 is fitted in the locking hole 61a at the right end P1 in FIG. 14 at the pull-out limit position of the platform 30, and the lock pin 62 is fitted in the locking hole 61a at the left end P2 in the pull-in limit position in FIG. However, when there is a risk of escape when operating the platform on a sloping ground, the slide pin 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, and operational safety is ensured.

If the platform 30 is not in the pull-out limit position with respect to the platform holder 10, there is a risk that the front vehicle stop plate 40 will interfere (catch) with the vehicle bumper. Since it is necessary to stand up to prevent falling, as a detecting means as shown in FIGS. 15 and 16, in order to detect that the platform 30 is in the pull-out limit position and the front vehicle stop plate 40 is in an upright state. A proximity switch 90 for preventing slide when moving up and down is fixed to the stay arm 5 (branch portion 5b) side. The proximity switch 90 for preventing slide during up-and-down movement is provided when a switch operating metal piece (a magnetic piece such as an iron piece) 91 fixed to the operation plate 41 integrated with the front vehicle stop plate 40 is closely opposed (when the platform is at the pull-out limit position). The hydraulic circuit is controlled so that the front-side vehicle stop plate is turned on (in the state of FIG. 15) and the double-acting hydraulic cylinder 20 for lifting drive is operable. When the platform 30 is not in the pulling-out limit position or the front vehicle stop plate 40 is not in the upright state, the switch operating metal piece 91 does not closely face the slide prevention proximity switch 90 at the time of raising and lowering, and the switch concerned. 90 is off, and the double-acting hydraulic cylinder 20 for lifting drive cannot be operated. As a result, it is possible to prevent the occurrence of device failure or danger due to erroneous operation.

Further, in order to ensure safety, the front vehicle stop plate 40 needs to be maintained (locked) in an upright state when the platform 30 is raised and lowered. Therefore, as shown in FIG. 15, the platform 30 is pulled out. Stopper mechanism 100 that keeps the front vehicle stop plate 40 in the upright state at the limit position
Is provided. The stopper mechanism 100 is an inverted L-shaped stopper rod 102 fixed to the vertical side plate 14b of the platform holder 10, and closely faces a plate member 103 fixed to the upper side of the operation plate 41 integral with the front wheel stop plate 40, The front end of the front wheel stop plate 40 is prevented from moving downward 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 phantom line in FIG. 7 to the retracted state of the solid line in the figure when the platform 30 is in the retracted limit position. Then, the platform holder 10 and the platform 30
Since the unfolding operation of (1) uses its own weight, the holder locking mechanism 110 shown in FIG. 14 is installed so that the platform holder 10 and the platform 30 do not tilt when landing. That is, the platform holder 10
A holder horizontal lock hole 111 is formed in the vertical side plate 14a of the holder lock pin 1 fitted in the lock hole 111.
Reference numeral 12 passes through a mounting member 113 fixed to the stay arm 5 (branch portion 5a) and is biased in a protruding direction by a compression spring 114. Further, a lock release lever 115 for retracting the holder lock pin 112 to release the lock is pivotally attached by a pin 117 to a mounting plate 116 fixed to the stay arm 5 (branch portion 5a), and the lock release lever 115
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. Then, by rotating the lock release lever 115 as indicated by the phantom line in FIG.
The lock between the platform holder 10 and the platform holder 10 can be released.

After the platform 30 is set in the retracted limit position with respect to the platform holder 10, it can be stored vertically by standing up from the horizontal state of the phantom line in FIG. 7 as shown by the solid line in FIG. A side stand 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 the hole portion 1 fitted into the eyebolt 121 as shown in FIG.
A lock fitting 130 having 31 is connected to a side end of the platform 30 via a hinge 132. Then, when the platform holder 10 and the platform 30 are stored upright laterally, the lock fitting 130 is inverted as shown by the phantom line in FIG.
31 is fitted and locked so that the platform holder 10 and the platform 30 are not horizontally deployed.

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

First, as shown in FIG.
When the platform holder 10 and the platform 30 are stored in the upright state as described above, the lock fittings 130 of the platform side upright lock mechanism 120 are removed from the eyebolts 121 and manually operated to enable the lifting device to be used. The platform holder 10 and the platform 30 are unfolded horizontally. When the platform holder 10 is unfolded horizontally, the holder lock pin 112 of the holder locking mechanism 110 of FIG. 14 is fitted into the horizontal lock hole 111 on the platform holder 10 side, and the platform holder 10 is horizontally locked with respect to the stay arm 5. To be done. At this time, the front wheel stop plate 40 is temporarily laid down so that a wheelchair or the like in the vehicle compartment can be moved to the platform 3
0 can be transferred. At this time, since the rear vehicle stop plate 50 maintains a state in which the landing roller 57 is lowered due to a sufficient gap between the platform 30 and the vehicle body floor surface 1a, the rear vehicle stop plate 50 is locked in an upright state and is not used in a wheelchair or the like. Prevents falls.

Before the operation of pulling out the platform 30, the front vehicle stop plate 40 is set up, and then the platform 30 at the retracted limit position is set up at the rear end position as shown in FIGS. 5 and 6. Holding the slide operation lever 80, pull out to the pull-out limit position shown in FIGS. 2, 3, and 4. At this time, by pulling and tilting the slide operation lever 80 toward the front of the operator, the lock pin 62 of FIG. 16 comes out of the lock hole 61a of the left end position P2 of FIG. 14 corresponding to the pull-in limit position on the platform 30 side. The platform 30 can be slid on the platform holder 10 to manually pull out the platform 30 to the pull-out limit position. After the completion of pulling out, by releasing the slide operation lever 80, the slide operation lever 80 returns to the neutral position, and the lock pin 62 is fitted into the lock hole 61a at the right end position P1 in FIG. 14 corresponding to the pull-out limit position on the platform 30 side. Then, the platform 30 is locked to the pullout limit position with respect to the platform holder 10.
Since the front vehicle stop plate 40 is set up before the operation of pulling out the platform 30, the movement of the operation plate 41 is blocked by the inverted L-shaped stopper rod 102 of the stopper mechanism 100 as shown in FIG. By setting this state, the proximity switch 9 for slide prevention during lifting and lowering
The switch actuation metal piece 91 closely opposes to 0, and the proximity switch 90 for preventing slide during ascent / descent is turned on, so that the double-acting hydraulic cylinder 20 for elevation drive can be operated.

As shown in the solid line in FIG. 1 and in FIG. 2, the double-acting hydraulic cylinder 20 for lifting / lowering drive is operated (compressed) from the pull-out limit position of the platform 30, and the main arm 3 and the sub-arm 4 are rotated 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 vehicle stop plate 40 is locked by the stopper mechanism 100 in the upright state, and the rear vehicle stop plate 50 is also continuously locked in the upright state. Therefore, the wheelchair C shown in phantom in FIGS. 1 and 2.
It is possible to reliably prevent the fall of H and the like.

As shown in the phantom line in FIG. 1, when the platform 30 is completely landed, the landing roller 57 in FIG. 12 hits the ground and the lower end of the landing detection plate 55 is lifted up. Rear vehicle stop plate 50
Turns into a prone state and the wheelchair CH or the like can be moved to the ground.

On the contrary, when a ground wheelchair or the like is loaded in the van-type vehicle 1, it is placed on the platform 30 in the landing state via the rear side vehicle stop plate 50 in the lying state as shown by the phantom line in FIG. The wheelchair CH or the like is placed on the floor, and the double-acting hydraulic cylinder 20 for raising and lowering is operated (extended) to raise the platform 30 to the upper limit position (at the position where the solid line platform holder 10 is placed on the floor 1a). Move to.).

Next, as shown in FIGS. 2 to 4, the platform 30 at the pull-out limit position is pushed out to the pull-in limit position by holding the slide operation lever 80 standing at the rear end position. At this time, the slide operation lever 8
By pushing and tilting 0 toward the front of the operator, the lock pin 62 in FIG. 16 comes out of the lock hole 61a at the right end position P1 in FIG. 14 corresponding to the pull-out limit position on the platform 30 side, and therefore slides on the platform holder 10. Then, the platform 30 can be manually retracted to the retracted limit position. After the pulling-in is completed, the slide operating lever 80 is released to return the slide operating lever 80 to the neutral position, and the lock pin 62 is fitted into the lock hole 61a at the left end position P2 in FIG. 14 corresponding to the pull-in limit position on the platform 30 side. Then, the platform 30 is locked to the retracted limit position with respect to the platform holder 10.

After the platform 30 is set in the retracted limit position as shown in FIG. 5, the wheelchair CH or the like is moved to the floor surface 1a with the front vehicle stop plate 40 lying down.

The front vehicle stop plate 40 is locked in the upright state by the stopper mechanism 100 shown in FIG. 15 except when the front vehicle stop plate 40 is in the retracted state, and the rear vehicle stop plate 50 is provided except when the platform 30 is landed. Since it is locked in the standing state, it is possible to reliably prevent the wheelchair CH or the like from falling.

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

(1) Not only can the platform 30 be lifted up and down, but it can also be retracted into the vehicle body to improve the operability of the user, such as a wheelchair, dolly, etc., and realize the smooth use of the wheelchair, dolly, etc. It is possible to improve. 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 retracted or when the platform holder 10 and the platform 30 are further rotated 90 degrees to be in the retracted state of standing vertically in a lateral position inside the vehicle body, the platform is used. The cargo can be loaded and unloaded smoothly, and the existence of platforms does not hinder the loading and unloading of other cargo.

(3) The platform holder 10 includes vertical load rollers 11, 12a and 12b for regulating the vertical position of the platform 30, and the platform 30.
And a horizontal shake prevention roller 13 that regulates the horizontal position of the platform 30. The platform 30 can be smoothly pulled out and pulled in.

(4) The platform 30 is provided with a escape prevention mechanism capable of locking the platform 30 with respect to the platform holder 10 at the pull-out limit position, the pull-in limit position, and a plurality of intermediate positions. The pulling and pulling operations can be performed safely.

(5) A front wheel stop plate 40 is erected on the front edge of the platform 30 so that it can be raised and lowered, and a stopper mechanism 100 is provided for keeping the front wheel stop plate 40 in an upright state when the platform 30 is pulled out. Therefore, the front vehicle stop plate 40 is always locked in the upright state at the pull-out limit position of the platform 30, including when the platform 30 is being lifted. Further, the rear vehicle stop plate 50 is always locked in the upright state by the up-and-down drive mechanism when the platform 30 is not landed. Therefore, a fall accident such as a wheelchair or a dolly can be reliably prevented, and sufficient safety can be ensured.

(6) A proximity switch 90 for preventing slide during ascent / descent is provided as a detecting means for detecting that the platform 30 is in the pull-out limit position and the front vehicle stop plate 40 is in the upright position, and in the pull-out limit position of the platform 30. The platform 30 can be lifted and lowered only when the front vehicle stop plate 40 is in the upright state, and damage to the device and accidents due to erroneous operation can be prevented.

(7) The platform holder 10 is adapted to be locked to the stay arm 5 by the holder locking mechanism 110 when it is horizontally deployed.
0 One side can be prevented 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 the push button switch 140 is provided on the slide operation lever 80.
By pressing 40, the escape prevention solenoid 65 is energized to remove the lock pin 62 from the lock hole 61a. The push button switch 140 and the escape prevention solenoid 65 are linked by a wired method (for example, using a flexible wire) or a wireless method (such as an infrared remote controller).
Any of these may be used.

The rest of the configuration of the second embodiment is similar to that of the first embodiment described above.

In the case of the second embodiment shown in FIG. 18,
There is an advantage that the mechanical structure for operating the escape prevention solenoid 65 is simplified.

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

The trolley 160 is attached to the slide rail 15
19, the ball screw shaft 151 is supported in parallel with the slide rail 150 by a bearing 152 fixed to the slide rail 150 so as to move along 0. The ball screw nut screwed onto the ball screw shaft 151 is shown in FIG. 153 is fixed to the trolley 160 (runner 162) side. Then, the ball screw shaft 151 is attached to the sprocket 15
5, the electric motor 154, which is rotationally driven via the winding transmission mechanism of the chain 157 and the chain 157, slides on the slide rail 150.
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 adopted in the first embodiment is unnecessary, but the configuration of the other parts is eliminated. Can adopt the same mechanism as that of the first embodiment.

In the third embodiment, the fact that the final position of the ascending operation of the platform 30 is a position where the platform 30 is lowered by several millimeters after passing through the upper dead center position is utilized, and the platform 30 is moved up and down by a 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 that moves integrally with the ball screw nut 153 can be moved along the slide rail 150 in the platform retracting direction. Further, it is possible to shift the retracted platform 30 to the retracted state by reversing the electric motor 154. That is, the movement of the platform 30 between the pull-out limit position and the pull-in limit position can be automated.

It is also possible to employ a mechanism for automatically raising and lowering the front wheel stop plate 40 before the platform 30 reaches the retracted 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 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.

If the platform is retracted or the platform holder and the platform are erected vertically at a lateral position inside the vehicle body, loading and unloading work of cargoes without using the platform can be carried out smoothly. Does not interfere with the loading or unloading of other cargo.

Further, the platform holder includes a first roller for controlling the vertical position of the platform,
It has a second roller that regulates the position of the platform in the horizontal direction, and it is possible to realize smooth withdrawal and retraction operations of the platform, and it is possible to improve operability.

[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 and showing a lifting operation of a platform.

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

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

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

FIG. 5 is a side view showing the platform in the retracted limit position in the first embodiment.

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 vertically erected and stored in the first embodiment.

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

FIG. 9 is a plan view of the same.

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

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

FIG. 12 is a partial enlarged side view showing a rear vehicle stop plate and a mechanism portion associated therewith in the first embodiment.

FIG. 13 is an enlarged bottom view of the portion.

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 portion.

FIG. 17 is a partially enlarged plan view showing a side erection 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 the third embodiment of the present invention.

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

FIG. 21 is an enlarged cross-sectional view of the relevant part.

[Explanation of symbols]

 1 Van-type vehicle 1a Body floor 2 Main frame 3 Main arm 4 Sub-arm 5 Stay arm 6 Holder mounting bracket 10 Platform holder 11, 12a, 12b Vertical load roller 13 Lateral runout prevention roller 20 Double-acting hydraulic for vertical movement Cylinder 30 Platform 31 Guide rails 32, 33 Guide member 34 Bracket 35 Traveling roller 40 Front car stop plate 41 Operation plate 50 Rear car stop plate 52 Perforated engagement plate 53 Almost 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 operating member 74 Proximity switch release switch 80 Slide operation lever 90 Slide prevention during lifting 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

Claims (6)

[Claims] 1. A body frame fixed to a floor of a vehicle body,
First and second arms forming a parallel link, one end of which is pivotally attached to the body frame, a stay arm pivotally attached to the other ends of the first and second arms, and attached to the lower end of the stay arm. And a platform holder that is horizontally supported in a deployed state, a platform that is slidably attached to the platform holder, and a cylinder that drives the platform to move up and down by rotating the first or second arm. And the platform holder includes a first roller that regulates a vertical position of the platform and a second roller that regulates a horizontal position of the platform. 2. The lifting device according to claim 1, further comprising a escape prevention mechanism capable of locking the platform with respect to the platform holder at a pull-out limit position, a pull-in limit position and at least one intermediate position. 3. A front car stop plate is movably connected to a front edge of the platform, and a stopper mechanism is provided for keeping the front car stop plate in an upright state at a draw-out limit position of the platform. Or the lifting device according to 2. 4. A detection means is provided for detecting that the platform is at the pull-out limit position and the front car stop plate is in the upright position, and the detection means is provided only when the front side car stop plate is in the upright position at the platform pull-out position. The lifting device according to claim 3, which enables lifting and lowering of the platform. 5. A rear wheel stop plate is movably connected to a rear edge of the platform, and the rear wheel stop plate is held in an upright state by a hoisting drive mechanism in a non-landing state of the platform. Lifting device according to 1, 2, 3 or 4. 6. A trolley, comprising: a slide rail fixed on the floor surface of the vehicle body; and a trolley that is driven by a driving means to move along the slide rail. The trolley is provided with the platform at an upper limit position of the platform. The lifting device according to claim 1, wherein the lifting device is mounted on the platform and the trolley is moved to retract or pull out the platform.