JP2008120300A - Lift - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lift easy in locking operations and lock-releasing operations of vehicle stop boards, high in safety, and excellent in operability. <P>SOLUTION: This lift comprises a lifting platform 30, a platform holder 10 holding the lifting platform 30 movably in the longitudinal direction, a mechanism for driving the platform holder 10 so as to be liftable between the floor surface of a vehicle body and the ground, the front vehicle stop board 41 undulately connected to the front edge of the lifting platform 30, and the rear vehicle stop board 50 undulately connected to the rear end of the platform holder 10. When the lifting platform 30 is at the forward limit position relative to the platform holder 10, the rear vehicle stop board 50 is vertically locked. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevating device that is mounted on a vehicle and gets on and off a wheelchair, a carriage, or other cargo.

  Conventionally, as this type of lifting device, a device shown in the following Patent Document 1 proposed by the present applicant is known. This conventional apparatus has a structure in which a platform is attached to a lower end portion of a side frame that is lifted and lowered by a parallel link mechanism. By rotating the parallel link, the platform is placed at a landing position and a vehicle body floor such as a van type car. It can be moved up and down between the substantially coincident rising positions.

Japanese Utility Model Publication No. 63-44272

  By the way, when the above-mentioned conventional device is used for getting on and off a wheelchair, the user of the wheelchair is on the platform outside the vehicle in a state where the platform is substantially flush with the floor of the vehicle body such as a van type car or a one-box car. It is indispensable to move the wheelchair from the vehicle body floor to the vehicle floor or vice versa, and there are some steps or gaps between the platform outside the vehicle and the vehicle floor, so smooth movement of the wheelchair is possible. There was a risk of hindrance. In addition, since it is necessary to operate the wheelchair on the platform in the raised position on the outside of the vehicle, there is a tendency to give anxiety to the wheelchair user.

  It should be noted that the front and rear edges of the platform are provided with a vehicle stopper plate that can be raised and lowered to prevent the wheelchair from falling off, but the vehicle stopper plate can be easily locked and unlocked and moved up and down in the unlocked state. A mechanism to prevent it is desired.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a lifting device that is simple in locking and unlocking operation of a car stopper plate, high in safety, and good in operability.

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

  In order to achieve the above object, a lifting device according to an aspect of the present invention includes a lifting platform, a platform holder that holds the lifting platform movably in the front-rear direction, and the platform holder on a vehicle body floor surface and in a landing state. A mechanism for driving up and down, a front vehicle stop plate connected to the front edge of the lift platform so as to be raised and lowered, and a rear vehicle stop plate connected to the rear end of the platform holder so as to be raised and lowered. When the platform is at the forward limit position with respect to the platform holder, the rear vehicle stop plate is locked in an upright state.

  The lifting device according to another aspect of the present invention includes a lifting platform, a platform holder that holds the lifting platform movably in the front-rear direction, a stay arm that is attached to the lower end of the platform holder, and a vehicle body floor surface. A main body frame, first and second arms forming a substantially parallel link with one end pivotally attached to the main body frame and the other end pivotally attached to the stay arm, and the first or second arm A cylinder for driving the elevator platform to move up and down, a front vehicle stop plate connected to the front edge of the elevator platform so as to be raised and lowered, and a rear vehicle stop plate connected to the rear end of the platform holder so as to be raised and lowered And when the lifting platform is in the forward limit position with respect to the platform holder, the rear vehicle stop plate is raised. It is characterized by being locked.

  In the elevating device, an operation roller is pivotally attached to a rear end portion of the elevating platform, the rear car stop plate is urged by a spring in a standing direction, and a side of the rear car stop plate is in contact with the operation roller. An operation surface is formed, the operated surface has an inclined surface that becomes higher toward the tip of the rear vehicle stop plate, and a flange portion that opposes the end portion of the operated surface is formed on the rear vehicle stop plate. Formed on the side, and when the lifting platform is at a forward limit position with respect to the platform holder, the operation roller enters between the flange and the operated surface to raise the rear vehicle stop plate The structure may be maintained in a state.

  In the elevating device, when the platform holder is in the ascending limit position on the vehicle body floor surface and the elevating platform is in the retracting limit position with respect to the platform holder, the lifting platform is locked in the retracting limit position. The structure further provided with a lock mechanism may be sufficient.

  In the elevating device, an operation link mechanism is provided for the front vehicle stop plate, and the operation link mechanism includes an operation lever pivotally attached to the elevating platform side so as to be swingable from a lock position to a lock release position. A link connecting the distal end portion of the front vehicle stop plate and the operation lever, and in the locked position, the link center (C1) of the operation lever and the link to the end portion of the front vehicle stop plate The link center (C3) of the link to the operation lever is located below the straight line connecting the center of the center (C2), and even if an external force in the direction of lowering the front stop plate is applied. The operation lever may be configured so that a force for maintaining the locked position is applied and the state does not change.

  According to the lifting device according to the present invention, the locking operation and unlocking operation of the vehicle stopper plate can be simplified, the operability can be improved, and the safety can be improved. And smooth use of a wheelchair, a cart, etc. is realizable.

  Hereinafter, as the best mode for carrying out the present invention, an embodiment of a lifting device will be described with reference to the drawings.

  1 and 2 show an embodiment of the present invention, which shows the overall configuration of the lifting device, FIG. 3 shows a mechanism part for driving the lifting platform back and forth, and FIG. 4 shows a lifting platform support mechanism by a platform holder. 5 and FIG. 6 show a front side car stop device, FIG. 7 and FIG. 8 show a rear side car stop device, and FIG. 9 and FIG. 10 show a lock mechanism that holds the lifting platform in the retracted limit position.

  1 and 2, 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 the rear surface opening of the vehicle body of the van-type vehicle. Yes. A main arm 3 and a sub arm 4 that constitute a substantially parallel link are pivotally attached (rotatably mounted) to the main body frame 2. That is, one end of the main arm 3 is pivotally attached to the main body frame 2 by the pin 3a, and one end of the sub arm 4 is pivotally attached by the pin 4a. A stay arm 5 is pivotally attached to the other end of the main arm 3 and the sub arm 4 by pins 3b and 4b, and a platform holder 10 is fixed to the lower end of the stay arm 5. Further, a double-acting hydraulic cylinder 20 for driving up and down is connected between the pins 4a and 3b. Therefore, when the double-acting hydraulic cylinder 20 is contracted, the platform holder 10 is in the raised position in FIG. 1, and when the double-acting hydraulic cylinder 20 is extended, the platform holder 10 is in the lowered position in FIG.

  On the platform holder 10, an elevating platform 30 is slidably (slidable) in the front-rear direction. The platform holder 10 is configured to support both side surfaces of the lifting platform 30 and includes side members 10a (also shown in FIG. 9) on both sides and a connecting portion 10b that connects the lower portions of the left and right side members 10a. As shown in FIG. 4, the side member 10 a is pivotally supported (rotatably supported) by a plurality of rollers 11 opposed to both side surfaces of the lifting platform 30, and engages with these rollers 11. 31 constitutes side portions on both sides of the platform 30.

  Further, the front-rear drive of the platform 30 is performed by winding a toothed belt (timing belt) 32 having both ends fixed to the front and rear of the platform 30 around a drive belt wheel 13 that is rotationally driven by the electric motor 12, as shown in FIG. Do. The electric motor 12 is fixed to the platform holder 10, and driven belt wheels 14, 15 are pivotally supported by the platform holder 10 before and after the driving belt wheel 13.

  As shown in FIG. 1A and FIG. 4 showing a state where the lifting platform 30 is retracted to the retracted limit position (the most retracted position), as shown in FIG. A roller 35 is pivotally attached. The traveling roller 35 travels on a retracting rail 36 (integrated with the main body frame 2) fixed on the floor surface 1a when the platform 30 is retracted into the passenger compartment of the van type vehicle 1. The platform 30 can be smoothly retracted and retracted.

  As shown in FIG. 5 and FIG. 6, the front car stop device 40 includes a front car stop plate 41 that is undulated and connected to the front edge of the lifting platform 30 (here, the right side in FIG. 1 is the front side of the platform), and the front car stop. A spring 42 that constantly urges the plate 41 in the standing direction and an operation link mechanism 70 are provided. That is, the front car stop plate 41 is connected to the front edge of the platform 30 by a hinge 45 having a pin 44, and the spring 42 is a hoop spring or the like. The lower end of the platform 30 and the lower surface of the front car stop plate 41 are connected to each other. It is arranged between joints. The spring 42 is provided to reduce the standing operation force of the front-side vehicle stop plate 41.

  The operation link mechanism 70 is moved from the lock position (= the position where the front vehicle stop plate 41 is raised to the state shown in FIG. 5A) to the lock release position (= the position where the front vehicle stop plate 41 is turned down as shown in FIG. 5B). The operation lever 71 is pivotally attached to one side of the front end of the platform 30 so as to be freely swingable, and the small link 72 is connected to the operation lever 71 and the distal end portion of the front wheel stopper plate 41. An operation lever 71 is rotatably attached to a bracket 46 fixed to the upper surface of the platform 30 by a pin 73 serving as a rotation fulcrum. End cylindrical members 74 and 75 are attached to both ends of the operation lever 71 so that the stepping operation is easy, and the operation lever 71 abuts against cushioning members (cushion rubber) 76 and 77 fixed on the platform side. The swing range of 71 is restricted.

  In the locked position of FIG. 5 (A), the operation lever 71 is connected to the operation lever 71 rather than a straight line connecting the pivot center C1 of the operation lever 71 and the pivot center C2 of the small link 72 to the end portion of the front side stop plate 41. Even if an external force is applied to the small link 72 so that the pivoting center C3 of the small link 72 is positioned downward and the front wheel stopper plate 41 is lowered, the operation lever 71 is applied with a force that maintains the locked position, and the state does not change. .

  When the operation lever 71 is swung from the locked position to the unlocked position shown in FIG. 5B by stepping or the like, the front vehicle stop plate 41 can be rotated from the standing state to the depressed state, and the front vehicle stop plate 41 is free from its own weight. The tip can be landed. Further, by stepping on the end cylindrical member 74 attached to the end portion of the operation lever 71, the operation lever 71 can be rotated to the right, and the front vehicle stop plate 41 can be returned to the standing state as shown in FIG. . Since the front side car stopper plate 41 is biased in the standing direction by the elastic force of the spring 42 (the elastic force is not strong enough to forcibly stand up), the operation lever 71 is rotated to the right to move the front car stopper plate 41. The operating force for returning to the standing state can be reduced. When the operation lever 71 returns to the lock position and the front vehicle stop plate 41 stands up, the lock is automatically applied.

  As shown in FIGS. 7 to 9, the rear side car stopper device 80 includes a rear car stopper plate 50 connected to the rear end of the side member 10 a of the platform holder 10 by a pin 51, and urges the rear car stopper plate 50 in the upright direction. Spring 52 (hoop spring or the like), an operation roller 81 (coaxial with the traveling roller 35) pivotally attached to the bottom surface of the rear end of the lifting platform 30 via a bracket 34, and a side portion of the rear vehicle stop plate 50 The operation surface 52 that is in contact with the operation roller 81 and the flange portion 53 that faces the end portion of the operation surface 52 are provided. The operated surface 52 has an inclined surface 52 a that becomes higher toward the tip of the rear vehicle stopper plate 50. The spring 52 is disposed between the engaging portions of the platform holder 10 and the rear surface of the rear vehicle stop plate 50 and has an elastic force that can force the rear vehicle stop plate 50 to stand up.

  When the lifting platform 30 is in a forward limit position (a state in which the platform holder 10 can be lifted and lowered at the most advanced position) with respect to the platform holder 10 in the rear side car stop device 80, FIG. 7 (C) and FIG. As described above, the platform-side operation roller 81 enters between the flange 53 on the rear vehicle stop plate side and the operated surface 52 to hold (lock) the rear vehicle stop plate 50 in an upright state. For this reason, even if an external force is applied in a direction that causes the rear vehicle stop plate 50 to bend down, the operation roller 81 is positioned below the flange portion 53, so that the rear vehicle stop plate 50 can be kept standing.

  The advance limit position of the elevating platform 30 relative to the platform holder 10 is such that a stopper 90 attached to the rear end portion of the platform 30 abuts on the roller 11 on the platform holder 10 side (the left end position) as shown in FIG. It is prescribed.

  When the lifting / lowering platform 30 is retracted at the ascending limit position where the platform holder 10 is pulled up on the vehicle body floor surface 1a, the platform 30 in FIG. 7 moves to the left. As a result of moving to the left, the operation roller 81 moves on the inclined surface 52a as shown in (d) and (e) from the locked state in FIG. 7 (c), and the operated surface 52 is pushed down by the operation roller 81. The rear-side vehicle stop plate 50 is in a state of being obstructed so that the platform 30 can be retracted.

  9 and 10 show that when the platform holder 10 is in the ascending limit position on the vehicle body floor surface 1a and the elevating platform 30 is in the retracting limit position with respect to the platform holder 10, the lifting platform 30 is in the retracting limit position. 1 shows a locking mechanism 100 for locking. The lock mechanism 100 includes a shaft body 101 that passes through the pull-in rail 36, a hook 102 (lock member) that engages with a bracket 34 on the bottom surface of the rear end of the platform 30, an arm 103, and an unlock hydraulic cylinder 104. And have. A hook 102 is fixed to one end of the shaft body 101, an arm 103 is fixed to the other end of the shaft body 101, and the arm 103 is attached in a direction to contact the unlocking hydraulic cylinder 104 by a coil spring 105 provided on the shaft body 101. It is energized. The cylinder 104 is fixed to a mounting plate 110 fixed to the pull-in rail 36 side.

  When the lifting platform 30 is moved in the retracting direction with respect to the platform holder 10, the hook 102 can be rotated counterclockwise as shown in FIG. 10, so that it can move to the retracting limit position. By engaging with the engaging portion 34a of 34, the advancement of the elevating platform 30 can be prevented and locked.

  The lock mechanism 100 can be unlocked by pressing the arm 103 in the solid line state of FIG. 10 with the rod 104a of the unlocking hydraulic cylinder 104 and rotating it to the left (imaginary line position). 30 can be advanced.

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

  As shown in FIG. 1, when the double-acting hydraulic cylinder 20 for raising and lowering drive is in a contracted state, the platform holder 10 is in the raised position where it is drawn into the passenger compartment of the van-type vehicle 1, and the platform 30 is further moved to FIG. ), The platform 30 can also be retracted into the passenger compartment. The retracting operation of the platform 30 can be performed by rotating the driving belt wheel 13 counterclockwise with the electric motor 12 of FIG. 3 and causing the toothed belt 32 to travel in the left direction. Further, the platform 30 can be locked by the lock mechanism 100 at the retract limit position.

  On the other hand, when the operation driving belt wheel 13 is rotated to the right in the unlocked state of the lock mechanism 100, the platform 30 at the retract limit position in FIG. Position). In the forward position shown in FIG. 1 (b), the front vehicle stop plate 41 connected to the front edge of the platform 30 is set to the locked state (the state shown in FIG. 5 (A)). Further, since the rear vehicle stopper plate 50 connected to the rear edge of the platform holder 10 is forcibly provided with a driving force in the standing direction by the spring 52, the operation roller 81 shown in FIGS. When the operation roller 81 enters the space between the flange 53 on the rear vehicle stop plate side and the operated surface 52, the operation roller 81 is automatically locked.

  When the hydraulic cylinder 20 is extended from the advanced state of the platform 30 shown in FIG. 1 (b), the main arm 3 and the sub arm 4 constituting the substantially parallel link are rotated, and the platform holder 10 is landed as shown in FIG. To do. That is, the platform 30 descends while maintaining a substantially horizontal level. It is desirable to set two links composed of the main arm 3 and the sub arm 4 so that the tip side of the platform 30 is slightly lowered when landing.

  In FIG. 2, when the wheelchair 60 is put on the platform 30, the operation lever 71 of the vehicle stopper 40 of the lifting platform is swung to the unlocking position (left rotation operation) in FIG. In this state, the wheelchair 60 is moved to the platform 30. Thereafter, by swinging the control lever 71 to the locked position shown in FIG. 5A (right-turning operation), the front vehicle stop plate 41 is raised and the control lever 71 is set to the locked position shown in FIG. It returns and locks automatically. Therefore, even if the front vehicle stop plate 41 is pushed by the wheelchair 60, the front vehicle stop plate 41 maintains the standing state. Note that the rear vehicle stop plate 50 is also locked in the standing state of FIG.

  Then, the hydraulic cylinder 20 is contracted to rotate the main arm 3 and the sub-arm 4 to raise the platform holder 10 and the platform 30, so that the ascending limit position in FIG. The wheelchair 60 can be moved to the retract limit position of the platform 30. At the time of the retracting operation, as described with reference to FIG. 7, the rear vehicle stop plate 50 attached to the rear end of the platform holder 10 is automatically unlocked, and the rear vehicle stop plate 50 is in a face down state. Can be smoothly pulled in. Further, the platform 30 is locked by the lock mechanism 100 at the retract limit position.

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

(1) The lifting device of the present embodiment can be pulled into the vehicle body as well as raising and lowering the lifting platform 30 to improve the operability of the user such as a wheelchair and a cart, and the smooth use of the wheelchair and the cart To improve safety. That is, the wheelchair operation on the platform when the vehicle is in the raised position outside the vehicle body is unnecessary, and the wheelchair user does not feel uneasy.

(2) The rear car stop device 80 allows the rear car stop plate 50 to be automatically locked in the upright state when the elevating platform 30 is in the forward limit position with respect to the platform holder 10, so that the operability is good and safe. The nature is also high.

(3) The platform 30 can be pulled in and locked to the limit position by the lock mechanism 100, and rattling during vehicle travel can be prevented.

(4) The front side car stop device 40 operates the front side car stop plate 41 connected to the front edge of the platform 30 so as to be raised and lowered by the operation link mechanism 70, but the operation link mechanism 70 itself has a lock function. There is no need to provide a separate locking means, the structure is simplified, and the operability is good. That is, the lock position of the operation lever 71 is also a position where the front vehicle stop plate 41 is erected. At this lock position, the small link 72 is pivotally attached to the pivot center C1 of the operation lever 71 and the end portion of the front vehicle stop plate 41. The pivot center C3 of the small link 72 to the operation lever 71 is positioned below the straight line connecting the center C2, and the operation lever 71 is locked even if an external force is applied in the direction in which the front vehicle stop plate 41 is lowered. The force of the direction to keep the state is added, and the state does not change. In other words, the front vehicle stop plate 41 can be locked in the standing state.

(5) When the operating lever 71 is swung from the locked position to the unlocked position in order to place the front side car stopper plate 41 in a state of being lowered, the relationship between the C1, C2 and C3 is broken, and the front car stopper plate 41 is in an upright state. It is possible to turn to the state where it is lying down. Further, by swinging the operating lever 71 in the reverse direction, the front vehicle stop plate 41 returns to the standing state, and the operating lever 71 also returns to the lock position and is automatically locked. Therefore, there is no need to forget to lock, and safety can be improved.

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

It is a whole structure of embodiment of the raising / lowering apparatus which concerns on this invention, Comprising: It is a side view when an raising / lowering platform exists in a raise limit position. Similarly, it is a side view when the platform holder is in a landing state. It is a side view which shows the mechanism part which drives a raising / lowering platform to the front-back direction. It is a partial expanded sectional view which shows the structure part which supports a raising / lowering platform movably in the front-back direction with a platform holder. It is an enlarged side view which mainly shows the front side vehicle stop apparatus of a raising / lowering platform. It is also an enlarged plan view. It is an enlarged side view which mainly shows a rear side vehicle stop apparatus. It is a perspective view which shows the side part structure of a rear side vehicle stop plate. It is a top view which shows the attachment structure and locking mechanism of a rear side vehicle stop plate. It is an enlarged side view of a lock mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Van type car 1a Floor surface 2 Main body frame 3 Main arm 4 Sub arm 5 Stay arm 10 Platform holder 11, 35 Roller 12 Electric motor 13 Drive belt wheel 20 Drive hydraulic cylinder 30 Lifting platform 31 Cross section substantially U-shaped rail 32 Toothed belt 36 Pull-in rail 40 Elevating platform car stop device 41 Front car stop plate 42, 52 Spring 45 Hinge 50 Rear car stop plate 53 Operated surface 54 Hut 60 Wheelchair 70 Operation link mechanism 71 Operation lever 72 Small links 76, 77 Buffer member 80 Rear side stop device 81 Operation roller

Claims (5)

A lifting platform;
A platform holder for holding the lifting platform movably in the front-rear direction;
A mechanism for driving the platform holder up and down between the vehicle body floor and the landing state;
A front vehicle stop plate connected to the front edge of the elevating platform so as to be raised and lowered;
A rear vehicle stop plate connected to the rear end of the platform holder so as to be raised and lowered;
The elevating device, wherein the rear vehicle stop plate is locked in an upright state when the elevating platform is in a forward limit position with respect to the platform holder. A lifting platform;
A platform holder for holding the lifting platform movably in the front-rear direction;
A stay arm with the platform holder attached to the lower end;
A body frame fixed to the body floor,
First and second arms forming a substantially parallel link having one end pivotally attached to the body frame and the other end pivotally attached to the stay arm;
A cylinder for rotating the first or second arm to drive the lifting platform;
A front vehicle stop plate connected to the front edge of the elevating platform so as to be raised and lowered;
A rear vehicle stop plate connected to the rear end of the platform holder so as to be raised and lowered;
The elevating device, wherein the rear vehicle stop plate is locked in an upright state when the elevating platform is in a forward limit position with respect to the platform holder. An operation roller is pivotally attached to the rear end of the lifting platform,
The rear side stop plate is urged by a spring in a standing direction,
An operated surface that is in contact with the operation roller is formed on a side portion of the rear vehicle stop plate, and the operated surface has an inclined surface that becomes higher toward a tip of the rear vehicle stop plate,
Furthermore, a collar portion facing the end portion of the operated surface is formed on a side portion of the rear vehicle stop plate,
The operation roller is inserted between the flange and the operated surface when the lifting platform is at a forward limit position with respect to the platform holder, and holds the rear vehicle stop plate in an upright state. 2. The lifting device according to 2.   And a lock mechanism for locking the elevating platform to the retracted limit position when the platform holder is in the ascending limit position on the vehicle body floor and the elevating platform is in the retracted limit position with respect to the platform holder. The lifting device according to claim 1, 2 or 3. An operation link mechanism is provided for the front vehicle stop plate,
The operation link mechanism includes an operation lever pivotally attached to the lifting platform so as to be swingable from a lock position to a lock release position, and a link that connects the end portion of the front vehicle stop plate and the operation lever. ,
In the locked position, the link of the link to the operation lever is more than the straight line connecting the pivot center (C1) of the operation lever and the pivot center (C2) of the link to the end portion of the front wheel stop plate. The pivoting center (C3) is located below, and even if an external force is applied in a direction to turn down the front car stopper plate, the operating lever is applied with a force that maintains the locked position, and the state does not change. 5. A lifting device according to claim 1, 2, 3 or 4.

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