JP2005145237A - Lift for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lift for a vehicle, in which the space between an installation part and a vehicle floor surface can be set large, while setting the height of the installation part low, which is positioned inward. <P>SOLUTION: At an upper position of a support body 2 movable between the upper position and a lower position, a guide and support means A is provided to guide and support the installation part 1 to be slidable between an outward position on the outer side of the vehicle and an inward position on the inner side of the vehicle. With the guide and support means, the installation part 1 is guided and supported to be slidable in such an inclination direction that the height of the installation part 1 is lower at the inward position than at the outward position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a support body configured to be movable up and down to a lowered position on or near the ground and a raised position located on a floor surface of a vehicle, and a mounting portion on which the mounted body is configured to be mounted. And a guide support means for slidably guiding the mounting portion to an outer position on the vehicle outer side and an inner position on the vehicle inner side with respect to the support at the raised position of the support. It is related with the raising / lowering device for vehicles provided with.

Such a vehicle lifting device lifts and lowers a support body to a raised position located on the floor surface of the vehicle or a lowered position grounded on the ground, and places it on a placing portion located at an outer position with respect to the support body. Used when raising a mounted object such as a wheelchair to a height corresponding to the floor of the vehicle or lowering a mounted object from the height corresponding to the floor of the vehicle to the ground In this configuration, the mounting unit is configured to be slidable between an outer position on the vehicle outer side and an inner position on the inner side of the vehicle at the raised position of the support body. It is possible to move to the vehicle inner side and the vehicle outer side while being placed on the mounting portion, and in the state where it is moved to the vehicle inner side, the mounted body is moved on the floor surface of the vehicle, It is made to move from the floor surface to the placement section.
The floor surface of a vehicle equipped with such a vehicle elevating device is formed higher than the lower floor portion that will be located below the support located at the raised position, and the lower floor portion. And the upper floor surface portion formed at the same height as the inner end of the mounting surface of the mounting portion positioned at the inner position, and the mounting portion moved to the inner position. The mounted body can move smoothly between the mounting portion and the floor surface of the vehicle so that there is no step between the mounting portion and the upper floor surface portion.
As such a vehicle elevating device, conventionally, the guide support means guides and supports the mounting portion so as to be slidable along the horizontal direction so as to have the same height at the inner position and the outer position. Was composed. Further, the support is configured to include a lower portion located below the placement portion, and a pair of side portions that are erected from both ends of the bottom portion so as to be located laterally of the placement portion. The support means is configured to guide and support each of both ends in the lateral width direction of the mounting portion with respect to the pair of side portions of the support (see, for example, Patent Document 1).

JP 2000-326781 A

As described above, the floor surface of the vehicle equipped with the vehicle lifting and lowering device is formed so as to have a lower floor surface portion that is positioned below the support body and higher than the lower floor surface portion. The upper floor surface portion formed at the same height as the height of the inner end of the mounting surface of the mounting portion located in the upper position is provided. On the surface, in order to widen the space in the vehicle, it is required to further reduce the height of the upper floor portion. However, in the conventional vehicle elevating device, when the height of the upper floor surface portion is lowered, the height of the inner end of the mounting surface of the mounting portion is the same as the height of the upper surface of the upper floor surface portion. Therefore, it is necessary to lower the height of the mounting portion relative to the lower floor surface portion, and the distance between the mounting portion and the lower floor surface portion becomes narrow, so the upper floor surface portion is lowered. It could not be formed.
In other words, when the interval between the mounting portion and the lower floor surface portion becomes narrow, for example, as described above as a conventional example, the support is positioned on the side of the mounting portion and the bottom portion located below the mounting portion. In this case, since the thickness of the lower portion located between the placing portion and the lower floor portion cannot be increased, the left and right sides are not provided. There is a possibility that the support is easily twisted due to insufficient strength for connecting the parts at the lower part, and the sliding movement of the placement part cannot be performed smoothly. For example, when a hydraulic cylinder is used as a drive source for moving the support up and down, a pipe for supplying and discharging pressure oil to and from the hydraulic cylinder is disposed between the mounting portion and the lower floor portion. Even if it is preferable in terms of piping, there is a disadvantage that if the distance between the placing portion and the lower floor surface portion becomes narrow, piping as desired cannot be performed. Thus, if the space | interval of a mounting part and a lower floor part becomes narrow, there exists a possibility of causing various disadvantages, and the height of the upper floor part could not be formed low.

  The present invention has been made in view of the above circumstances, and its purpose is to reduce the height of the mounting portion located at the inward position so as to lower the upper floor portion of the vehicle floor. However, the present invention is to provide a vehicle lifting apparatus capable of increasing the distance between the placing portion and the lower floor portion of the vehicle floor.

The vehicle elevating device of the present invention is configured such that a support body configured to be movable up and down at a lowered position on or near the ground and a raised position located on a floor surface of the vehicle, and a mounted body can be mounted. In the raised position of the support body, the support section is guided and supported so as to be slidable to an outer position on the vehicle outer side and an inner position on the vehicle inner side with respect to the support body. A vehicle elevating device provided with guiding support means for
In the first characteristic configuration, the guide support means guides and supports the mounting unit in a slidable manner along an inclination direction in which the height of the mounting unit is lower at the inner position than at the outer position. It is characterized by being configured as described above.

  That is, since the guide support means is configured to guide and support the mounting portion so as to slide along the inclination direction in which the height of the mounting portion is lower at the inner position than at the outer position, The mounting portion slides obliquely downward toward the inside of the vehicle when moving from the outside position to the inside position, and toward the outside of the vehicle when moving from the inside position to the outside position. As a result of sliding obliquely upward, the outer position is higher than the inner position.

As described above, since the placement portion is positioned higher than the inner position at the outer position, the following advantages can be obtained when the vehicle is equipped.
That is, the floor surface of the vehicle equipped with the vehicle lifting device is formed at a lower floor surface portion that is positioned below the support and higher than the lower floor surface portion, so that In order to widen the space in the vehicle, it is configured to include an upper floor portion formed at the same height as the inner end of the placement surface of the placement portion. It is required to reduce the height of the upper floor surface portion. And even if the height of the upper floor portion is lowered to satisfy the demand, the mounting portion slides along the inclination direction in which the height is higher at the outer position than at the inner position. Therefore, in order to make the upper surface of the lower upper floor portion and the placement surface of the placement portion have the same height, even if the height of the placement portion at the inner position is lowered, the outer position In this case, since the height of the mounting portion is increased, a large gap exists between the mounting portion at the outer position and the lower floor surface portion, for example, so that the bottom portion of the support body has sufficient strength. To avoid the disadvantages when the space between the mounting section and the lower floor is narrowed, such as by increasing the thickness of the pipe or by installing piping to supply and discharge the pressure oil to the hydraulic cylinder. It will be possible.

  Therefore, in order to lower the upper floor portion of the vehicle floor surface, the lower portion of the placement portion and the lower floor surface portion of the vehicle floor surface, while reducing the height of the placement portion located in the inward position, Thus, it has been possible to provide a vehicular lifting device that can increase the interval of the vehicle.

  In the second feature configuration, in addition to the first feature configuration, a guide rail is provided on the floor of the vehicle for receiving and supporting the mounting portion that has been slid and moved toward the vehicle inward side with respect to the support portion. It is characterized by that.

  That is, the mounting portion that has been slid inwardly of the vehicle relative to the support portion can be received and supported by the guide rail, and the sliding movement between the inner position and the outer position of the mounting portion can be performed with the guide support means Since it can guide and support by cooperation with the guide rail, the slide movement of the mounting body can be performed stably.

  In the third feature configuration, in addition to the first or second feature configuration described above, the support is formed on the bottom portion located below the placement portion and on the side of the placement portion so as to be located on the side of the placement portion. A pair of side portions erected from both lateral ends, and the bottom portion of the support is configured to increase the thickness of the vehicle outer side portion than the vehicle inner side portion, The guide support means is configured to guide and support each of both end portions in the lateral width direction of the mounting portion with respect to the pair of side portions of the support body.

  That is, in stably supporting the mounting portion on the left and right sides of the support, the thickness of the vehicle outer side portion of the bottom of the support can be increased to sufficiently reinforce the support. It is possible to reduce the displacement of the left and right side portions of the support body due to the twist of the support body, and to properly support the mounting portion with the support body.

  In addition to any one of the first to third feature configurations described above, the fourth feature configuration is configured such that the support is raised and lowered to the raised position and the lowered position by a lifting link mechanism, When the elevating link mechanism lowers the support body from the raised position to the lowered position, the elevating link mechanism raises the support body relative to the vehicle outer side relative to the vehicle outer side, and When raising the body from the lowered position to the raised position, the support body is configured to be lowered relative to the vehicle outer side relative to the vehicle inner side. .

  In other words, the support body in the inclined posture in which the vehicle outer side portion is positioned below the vehicle inner side portion in the raised position can be set in a horizontal posture when moved to the lowered position. The above-described advantages can be obtained, and in the lowered position, the vehicle can be in a horizontal posture to suppress inconveniences such as the vehicle outer side portion of the support being first grounded to the ground. be able to.

An embodiment of a vehicle lifting apparatus according to the present invention will be described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, the vehicle lifting device L is used by being mounted on the rear portion of a vehicle V such as a wagon car provided with an opening / closing door D that opens and closes a rear opening portion O, for example. It is.
As shown in FIGS. 1 to 3, the vehicle lifting device L includes a lifting platform S that includes a mounting portion 1 on which a wheelchair C can be freely mounted and a support body 2 that supports the mounting portion 1. A pair of left and right lifting arms 3 that support the support 2 at the lower end, a pair of left and right four-link mechanisms 4 that connect the pair of left and right lifting arms 3 to the vehicle V side, and a four-link mechanism for raising and lowering the lifting platform 1 4 includes a pair of left and right hydraulic cylinders 5 for operating 4 and a hydraulic pump 6 for supplying hydraulic oil to the hydraulic cylinders 5, and can be fixed to the rear portion of the vehicle V via a base frame 7 that supports the four-link mechanism 4. It is configured. As shown in FIG. 2, a casing 65 that houses hydraulic equipment including the hydraulic pump 6 is mounted on the vehicle V on the left side of the left four-link mechanism 4 and is covered with a cover 38. In addition, a pendant type operation tool 39 and a handrail 37 for raising and lowering the support 2 are also provided.
The wheelchair C corresponds to the mounted body, the four-link mechanism 4 corresponds to the lifting link mechanism, and the hydraulic cylinder 5 corresponds to the driving means.

Next, the nursing care lift device L will be described in detail. In this specification, for the sake of convenience, the forward direction of the vehicle V is referred to as the front, the reverse direction is referred to as the rear, and the left and right directions are specified in a state where the front is viewed from the rear. To explain. Further, since the vehicle lifting device L is mounted on the rear portion of the vehicle V and the placement portion moves in the front-rear direction with respect to the vehicle V, the vehicle inner side is the front side, and the vehicle outer side is the rear side. Will be described.
In addition, although the left and right members have the same configuration, the left and right members have substantially the same configuration. Therefore, only one of the left and right sides will be described, and members having different configurations on the left and right will be described each time.

  As shown in FIGS. 2 to 4, the base frame 7 is provided in a fixed state on the floor surface F of the vehicle V, and a base frame side bracket 8 that protrudes upward is provided at both left and right ends of the base frame 7. One end of the upper link 9 constituting the four-link mechanism 4 is pivotally connected to the base frame side bracket 8 via the first pin 11 and one end of the lower link 10 via the second pin 12, respectively. ing. Further, the other end of the upper link 9 is pivotally connected to the arm side bracket 13 via the third pin 14 and the other end of the lower link 10 via the fourth pin 15. The upper link 9, the lower link 10, the base frame side bracket 8, the arm side bracket 13, and the first to fourth pins 11, 12, 14, 15 constitute the four-link mechanism 4.

  The four-link mechanism 4 is configured such that the distance L2 between the third pin 14 and the fourth pin 15 is larger than the distance L1 between the first pin 11 and the second pin 12. In the four-link mechanism 4 on the left side, the second pin 12 that pivotally connects the lower link 10 to the base frame side bracket 8 is fixed to the lower link 10 side and rotates integrally with the lower link 10. It is configured as follows.

  As shown in FIGS. 3 and 4, the hydraulic cylinder 5 has a main body portion 5 </ b> A pivotally supported by a second pin 12 that pivotally supports a lower link 10 with respect to the base frame side bracket 8. The rod portion 5 </ b> B is connected to the third pin 14 that pivotally supports the upper link 9 with respect to the arm side bracket 13. The right hydraulic cylinder 5 of the pair of left and right hydraulic cylinders 5 is provided with an assist spring 21 interposed between the main body 5A and the tip of the rod 5B to assist the extension operation.

  As shown in FIGS. 3 and 4, the four-link mechanism 4 and the hydraulic cylinder 5 are covered by a link cover 17, and the left link cover among the link covers 17 provided on the left and right. A through hole is provided in the left wall surface of 17, and the second pin 12 extends to the outside of the left link cover 17 through the through hole.

  As shown in FIGS. 4 and 5, the arm-side bracket 13 is provided at the upper end of the elevating arm 3, and the support 2 for the elevating platform 1 is attached to the lower end of the elevating arm 3. The lifting platform 1 is held by a body 2 so as to be movable in the front-rear direction. In addition, the attachment part of the raising / lowering arm 3 and the support body 2 is covered with the cover 16 for support bodies made from a synthetic resin.

The relationship between the expansion and contraction of the hydraulic cylinder 5 and the lifting and lowering of the lifting platform S will be described. The lifting platform S is lifted and lowered by changing the angle of the four-link mechanism 4 with respect to the vehicle V by expanding and contracting the hydraulic cylinder 5. 14 is changed, and is moved up and down to a descending position where it contacts the ground G as shown in FIG. 14 (a) and an ascending position located on the floor F of the vehicle V as shown in FIG. 14 (b). The table S is configured to be movable up and down.
As described above, the four-link mechanism 4 is configured such that the distance L2 between the third pin 14 and the fourth pin 15 is wider than the distance L1 between the first pin 11 and the second pin 12. When raising the lifting platform S from the lowered position to the raised position, the lifting platform S is lowered relative to the vehicle outer side relative to the vehicle inner side, and the lifting platform S is moved from the raised position to the lowered position. When lowering, the lift S is raised relatively on the vehicle inner side with respect to the vehicle outer side.

  In other words, the lifting platform S is in a horizontal state when it is in the lowered position, and as the lifting platform S rises from the lowered position to the raised position, the lifting platform S is lowered relative to the vehicle outer side relative to the vehicle inner side. The position of the lifting platform S, that is, the posture of the mounting portion 1 and the support body 2 is positioned so that the vehicle outer side is positioned higher than the vehicle inner side when the lift position is reached. ° Inclined posture. Conversely, when the lift platform S is in the raised position, it is tilted by 1 ° as described above, and as the lift platform S is lowered from the raised position to the lowered position, the lift platform S is moved toward the outside of the vehicle. The vehicle inward side is relatively raised to approach a horizontal posture, and when the vehicle reaches a lowered position, the posture of the lifting platform S becomes a horizontal posture.

As shown in FIG. 11, a potentiometer 20 is provided on the lateral outer surface of the left machine frame side bracket 8. The potentiometer 20 is configured such that the detection shaft 20a is interlocked with the four-link mechanism 4 and the detection link 19, and outputs a voltage corresponding to the amount of rotation of the detection shaft 20a. The detection link 19 includes a main link member 19a having one end connected to the second pin 12, a driven link member 19b having one end connected to the detection shaft 20a, and the other end of the main link member 19a and a driven link. It is comprised by the interlocking link material 19c connected with the other end part of the material 19b, and interlocking the main link material 19a and the driven link material 19b.
That is, in the potentiometer 20, when the angle of the quadruple link mechanism 4 with respect to the vehicle V changes and the second pin 12 rotates, the detection shaft 20a rotates according to the rotation of the second pin, and the rotation amount of the detection shaft 20a Is output, and the height of the lifting platform S relative to the vehicle is detected by detecting the angle of the four-link mechanism 4 with respect to the vehicle V. In short, the potentiometer 20 is configured to detect the height of the lifting platform S relative to the vehicle and output a voltage corresponding to the height relative to the vehicle.

  As shown in FIGS. 5, 8, and 9, the support body 2 includes a bottom plate portion 2 a serving as a bottom portion located below the placement portion 1, and a bottom plate portion 2 a located laterally of the placement portion 1. With a pair of side walls 2b erected at both ends, the upper side is formed in a U-shape when viewed from the rear side. As described above, since the support 2 is in the inclined position in which the posture at the raised position is located on the vehicle outer side upward from the vehicle inner side, the rear portion of the support 2 on the vehicle inner side and the floor surface A relatively large space is formed with F. A long reinforcing member 43 is attached to the lower surface of the rear portion of the bottom plate portion 2a so as to use this space. By attaching the reinforcing member 43, the thickness of the rear portion of the bottom plate portion 2a is larger than that of the front portion. It is configured to be large. Further, the bottom plate portion 2a is formed so as to have a stepped shape with two upper and lower upper surfaces, and a lower step portion 42 is formed with the rear portion being a lower step. In the lower part of the front portion of the bottom plate portion 2a, the oil passages of the first oil passage 48a and the second oil passage 48b for supplying hydraulic oil from the hydraulic pump 6 disposed on the base frame 7 to the hydraulic cylinder 5 are provided. A recessed portion 44 is formed to avoid contact with 48. And as shown in FIG. 10, the mounting part 1 is formed with a protrusion 45 whose rear part protrudes downward from the front part.

  The slide movement of the mounting portion 1 with respect to the support 2 will be described. A pair of front and rear sliding idler rollers 25 projecting inward from the pair of side wall portions 2b of the support body 2 inwardly project, and a pinion gear 26 is provided on the left side wall portion 2b. The slide electric motor 27 provided is attached, and a pair of front and rear guide idler rollers 28 that rotate around the vertical axis toward the inside protrude from the right side wall 2b.

As shown in FIGS. 12 and 13, the mounting portion 1 is formed by dividing a left rail portion 29 and a right rail portion 30 having slightly different shapes on the left and right side portions, and facing outward. Supporting idler rollers 31 that rotate about the axis in the lateral direction are provided so as to protrude. The sliding idler roller 25 is fitted into the left rail 29 provided in the mounting portion 1, and the sliding idler roller 25 and the guide idler roller 28 are fitted to the right rail 30. And are fitted inside.
The placement unit 1 is guided and supported so as to be slidable in the front-rear direction with respect to the support 2 by a total of four sliding idle rollers 25 provided in a distributed manner on the side wall 2b of the support 2. The guide idler roller 28 is configured to prevent the rolling of the mounting portion 1 with respect to the support 2. That is, with the four sliding idler rollers 25, the guide that supports the mounting portion 1 so as to be slidably movable in the outward position and the inward position with respect to the support body 2 at the rising position of the support body 2. Support means A is configured.

  The portion located below the left rail portion 29 in the placement portion 1 is provided with a fitting portion 29a having a U-shaped cross section that opens downward, and the rack 32 is fitted into the fitting portion 29a. ing. The pinion gear 26 is meshed with the rack 32. On the floor surface F of the vehicle V, a guide rail 33 is provided that receives and supports the mounting portion 1 that has been slid and moved inward of the vehicle with respect to the support portion 2. As shown in FIG. 8, the guide rail 33 is provided to be inclined by 1 ° so that the front end portion is positioned lower than the rear end portion by placing the rear end portion on the base frame 7. As the mounting portion moves from the inner position to the outer position, the supporting idler roller 31 of the mounting portion 1 is guided forward and obliquely downward.

  Therefore, when the support body 2 is positioned at the raised position, the sliding electric motor 27 is driven to rotate forward and reverse, whereby the left rail portion 29 and the right rail portion 30 of the mounting portion 1 are free to slide on the support body 2. Guided by the roller 25 and the guide idler roller 28, the support idler roller 31 of the placement unit 1 is guided by the guide rail 33, and the above-described placement unit 1 is placed on the support body 2 positioned at the raised position. On the other hand, it is configured to move to an inward position on the front side of the vehicle as shown in FIG. 14 (B) and an outward position on the rear side of the vehicle as shown in FIG. 14 (C). At the inward position, the supporting idler roller 31 is inserted between the vibration preventing member 34 provided in the forefront of the guide rail 33 and the guide rail 33, so that the mounting portion 1 is moved in the vertical direction. It is configured to prevent vibration.

  Then, the support body 1 in the raised position is tilted so that the front side is positioned downward, so that the slide roller 25 on the rear side is positioned below the idle sliding roller 25 on the front side. Further, the guide rail 33 is provided so as to be inclined so that the front end portion is positioned lower than the rear end portion. Accordingly, when the placement unit 1 slides from the raised position to the lower position, it slides diagonally forward, and when the placement unit 1 slides from the lower position to the upper position, it slides backward and upward. Is configured to move.

Next, the receiving body provided before and after the lifting platform S will be described.
As shown in FIGS. 5 and 6, a plate-shaped front receiving body 35 that receives the movement of the wheelchair C from the mounting portion 1 to the front of the vehicle is swingable at the front end of the support 2. It is pivotally supported. The front receiving body 35 falls from the standing posture as shown in FIGS. 14 (a) and 14 (b) to the front side from the standing posture as shown in FIG. The posture can be freely changed depending on the posture. In this collapsed posture, the wheelchair C can move from the placement unit 1 to the front placement floor Fu. Then, as shown in FIG. 6, a saddle shape formed by bending the front receiving body 35 toward the distal end side of the receiving body 35 on the top surface of the front receiving body 35 near the rocking axis X and away from the distal end side. The engaged portion 81 is provided. The mounting floor Fu is formed by raising the floor surface F, and the upper surface of the mounting floor Fu is the same height as the front end of the mounting surface 1a of the mounting portion 1 moved to the inward position as shown in FIG. It is composed of approximately the same height.

  As shown in FIG. 15, a swing member 85 is pivotally supported around the axis Y at the lower portion of the front end of the mounting portion 1 so as to be swingable up and down. It is comprised by the engaging part 85a engaged with the said to-be-engaged part by the elongate shape along the horizontal width direction of the part 1, and the leg part 85b extended from each of the both ends of the engaging part 85a. Each of the leg portions 85b is pivotally supported by the placement portion 1.

Therefore, as the mounting portion 1 moves from the inner position to the outer position, the engaging portion 85a and the engaged portion 81 engage with each other and rotate relative to each other, whereby the swinging member 85 moves upward. The position is changed to an upward swing position where the engaging portion 85a protrudes forward from the front end of the mounting portion 1, and the front receiving body 35 swings upward to be in the standing posture. It is held by the moving member.
Further, as the mounting portion 1 moves from the outer position to the inner position, the engaging portion 85a and the engaged portion 81 rotate relative to each other, and the swing member 85 swings downward and is mounted. The position is changed to a downward swing position where the engaging portion 85a is stored below the mounting portion 1, and the front receiving body 35 swings downward to the above-described tilted posture, and the engaging portion 85a is moved by the subsequent movement of the mounting portion 1. And the engaged portion 81 are disengaged.

  A mounting portion side cushion material 82 that contacts the mounting portion 1 is provided on the upper surface of the front receiving body 35, and a floor surface side cushion that contacts the floor surface F is provided on the lower surface of the front receiving body 35. A material 83 is provided. In addition, in the state in which the placement portion 1 has moved to the inward position, the placement portion side cushion material 82 is in contact with the placement portion 1 and the floor surface side cushion material 83 is in contact with the floor surface F. The front receiving body 35 is configured to be prevented from vibrating in the vertical direction.

  As shown in FIG. 10, a plate-shaped rear receiving body 36 that receives the movement of the wheelchair C from the mounting portion 1 to the rear side of the vehicle is pivotally pivoted at the rear end portion of the mounting portion 1. After that, the receiving body 36 is tilted to the vehicle front side from the tilted posture and the standing posture in which the receiving action is released by tilting to the vehicle rear side from the standing posture and the standing posture in which the receiving operation is performed, and the rear receiving body is stored. It is configured to be swingable to the retracted posture. In the collapsed posture, the wheelchair C can move from the mounting table 1 to the ground G behind the ground because the free end contacts the ground G.

The rear receiving body 36 is configured such that the sprocket 46 that rotates integrally with the rear receiving body 36 rotates and swings by driving the electric motor for the rear receiving body or operating an artificial operation tool (not shown). It is configured.
Incidentally, when the mounting portion 1 as shown in FIG. 14C is in the inward position, the rear receiving body 28 can be rotated only between the standing posture and the retracted posture. (B) When the mounting portion 1 is in the outward position and the support body 2 is in the raised position and when the support body 2 is in the lowered position, any of the standing position, the falling position, and the retracted position can be used. The rear receiving body 28 can be rotated.

  And, as shown in FIG. 10, the sprocket 46 is arranged so as to enter the protruding portion 45 formed in the mounting portion 1 in a side view, and by allowing the sprocket 46 to enter the protruding portion 45 in this way, The rotating shaft core of the sprocket 46, that is, the swinging shaft core of the rear receiving body 36 moves downward, and the state where the front end portion of the rear receiving body 36 is grounded to the front portion of the mounting portion 1 is almost horizontal and stored. Since the height on the base end side of the rear receiving body 36 in the posture can be lowered, boarding or luggage of a person who accompanies the wheelchair C from the opening O of the vehicle V with the rear receiving body 36 in the retracted position. Is easier to place.

Next, a hydraulic circuit for extending and retracting the left and right hydraulic cylinders 5 will be described. As shown in FIG. 16, the pump electric motor 49 is linked to the hydraulic pump 6 for supplying hydraulic oil, and the suction side of the hydraulic pump 6 stores oil through the strainer 50. The tank 51 communicates with the hydraulic oil supply path 53 provided with a check valve 52 on the discharge side, and communicates with the electromagnetic switching valve 58 in a three-position switching system. However, they are communicated by a bypass 56 having a relief valve 55.
The first cylinder chamber 5a of each hydraulic cylinder 5 and the switching valve 58 communicate with each other through the first oil passage 48a, and the second cylinder chamber 5b of each hydraulic cylinder 5 communicates with the switching valve 58 through the second oil passage 48b. Has been.

The first oil passage 48a permits the flow of hydraulic oil only to the hydraulic cylinder 5 side, and if the oil pressure in the second oil passage 48b exceeds a set value, the pilot pressure operation allows the reverse flow by the pilot pressure. When the hydraulic pressure in the first oil passage 48a exceeds a set value, the first check valve 59a of the formula is provided, and the second oil passage 48b allows the hydraulic oil to flow only to the hydraulic cylinder 5 side. A pilot pressure operation type second check valve 59b that allows a backflow by the pilot pressure is provided.
Further, the first oil passage 48a is provided with a first flow control valve 60a composed of a throttle mechanism and a check valve, and the second oil passage 48b is a second oil having the same configuration as the first flow control valve 60a. A flow control valve 60b is interposed. The first oil passage 48a is connected to an oil discharge passage 42 for short-circuiting the hydraulic oil discharged from the hydraulic cylinder 5 to the oil tank 51. The oil passage 42 has a manually operated on-off valve 61. Is provided.

A manual supply path 62 is communicated with the supply path 53, and a manual suction path 63 is communicated with the discharge path 54. A manual operation type auxiliary is provided across the manual supply path 62 and the suction path 63. The pump 64 is configured to be able to communicate.
And in the said casing 65 shown with a virtual line in the figure, the hydraulic pump 6, the electric motor 49 for pumps, the oil tank 51, the non-return valve 52, the relief valve 55, the switching valve 58, the 1st and 2nd non-return valve The hydraulic pumps 59a and 59b, the first and second flow control valves 60a and 60b, etc. are all housed and unitized, and the casing 65 has a manual operation handle 64a and an auxiliary pump 64 with a check valve. However, it is comprised so that attachment is possible.

Next, the operation control of the vehicle lifting device L by the control means H will be described.
As shown in FIG. 17, the control means H includes a detection signal obtained by analog-digital conversion of the voltage output from the potentiometer 20 by the A / D conversion circuit 41, a lowering operation command by the operating tool 39, and an ascending operation. A finger and an opening operation command are input, and the operation of the pump electric motor 49, the slide electric motor 27, and the rear receiving plate electric motor 42 is controlled based on the information.

That is, when the lowering button 39a of the operation tool 39 is pushed and a lowering operation command is instructed in a state where the placing portion 1 is located at the inward position as shown in FIG. When the mounting unit 1 slides from the inward position to the vehicle rear side and the mounting unit 1 moves to the outward position as shown in FIG. The operation of the sliding electric motor 27 is stopped based on the signal, and the lifting platform S is in a state in which the mounting portion 1 is supported by the support 2. In addition, as the mounting portion 1 slides toward the rear side of the vehicle, the front receiving plate 35 that has fallen down is swung upward and switched to the standing posture.
Thereafter, the switching valve 58 is switched so that the hydraulic oil is supplied to the second cylinder chamber 5b, the cylinder electric motor 49 is operated, and the hydraulic pump 6 is supplied to each second cylinder chamber 5b of the pair of left and right hydraulic cylinders 5. Is supplied with hydraulic oil. Then, each of the hydraulic cylinders 5 is shortened, and by the action of the four-link mechanism 4, the lifting platform S is lowered from the raised position to the lowered position as shown in FIG.

  Based on FIG. 13, a detailed description will be given of the case where the lifting platform S is lowered from the raised position to the lowered position by the lowering operation command. The lower reference deceleration position set by the lifting platform S corresponding to the height near the ground. Is detected by the potentiometer 20 and when the voltage A corresponding to the vehicle height at the reference position for deceleration on the descending side is output from the potentiometer 20, the extension operation of the hydraulic cylinder 5 is decelerated and moved up and down. The descending speed of the table S is reduced. Then, the potentiometer 20 detects that the lifting platform S has been lowered from the descent-side deceleration reference position to the descent reference position set corresponding to the height near the ground, and the descent reference from the potentiometer 20 is detected. After the voltage B corresponding to the height of the vehicle with respect to the position is output, the mounting table S is grounded on the ground G and the descending of the mounting table 1 is stopped, so that the voltage output from the potentiometer 20 changes. If the state of disappearance or substantially disappearance (state in which the voltage C is output) continues for a stop determination time of about 0.5 seconds to 1 second, the hydraulic cylinder 5 is assumed to be lowered to the lowered position where the elevator S touches the ground G. The operation of is stopped.

  It should be noted that by operating the opening button 39c of the operating tool 39 only when the lifting platform S is in the lowered position, the rear receiving plate electric motor 42 is operated based on the opening operation command, and the rear receiving operation is performed. The position of the plate 36 can be changed to an upright position in which the free end contacts the ground G.

Further, when the lifting button 39b of the operation tool 39 is pushed and a lifting operation command is issued in a state where the lifting platform S is in the lowered position as shown in FIG. Is operated and the rear receiving plate 36 is changed to a standing posture in which the rear receiving plate 36 is swung upward, and then the switching valve 58 is switched so that the hydraulic oil is supplied to the first cylinder chamber 5a, and the cylinder electric motor 49 is operated. Then, hydraulic oil from the hydraulic pump 6 is supplied to the first cylinder chambers 5 a of the pair of left and right hydraulic cylinders 5. Then, each of the hydraulic cylinders 5 is shortened, and the lifting platform S is moved up and down by the action of the four-link mechanism 4 to be raised from the lowered position to the raised position as shown in FIG.
After that, when the slide electric motor 27 is actuated and the mounting portion 1 slides from the outer position to the front side of the vehicle and moves to the inner position as shown in FIG. The operation of the slide electric motor 27 is stopped based on the signal. In addition, with the slide movement of the lifting platform toward the front side of the vehicle, the front receiving plate 35 in the standing posture swings forward and is switched to the tilted posture.

  A detailed description will be given of the case where the placing portion is raised from the lowered position to the raised position by the raising operation command based on FIG. 18. The raising-side deceleration reference set by the lifting platform S corresponding to the height near the floor surface F. When the potentiometer 20 detects that the hydraulic cylinder 5 has been lowered to the position, and outputs a voltage Y corresponding to the height of the ascending deceleration reference position with respect to the vehicle height, the shortening operation of the hydraulic cylinder 5 is decelerated. To lower the rising speed of the lifting platform S. Then, the potentiometer 20 detects that the lifting platform S has moved up to the rising reference position set corresponding to the same or substantially the same height as the floor surface F, and the potentiometer 20 detects the pair of the rising reference positions. When the voltage Z corresponding to the vehicle height is output, the operation of the hydraulic cylinder 5 is stopped on the assumption that the lifting platform S has risen to the rising position at the same height or substantially the same height as the floor surface F.

[Another embodiment]
(1) In the above embodiment, the elevating link mechanism is constituted by a non-parallel quadruple link mechanism, and in the ascending position, the inclined position is such that the vehicle outer portion is located above the vehicle inner portion, and in the lower position. Although the support was raised and lowered so as to be in a horizontal posture, the raising and lowering link mechanism is constituted by a parallel quadruple link mechanism, and the raising and lowering is maintained while maintaining the inclined posture, so that it can be raised or lowered. The posture of the support body is configured to be an inclined posture, or the posture of the support body is configured to be a horizontal posture at any of the raised position and the lowered position by maintaining the horizontal posture and moving up and down. May be.
The inclined posture of the support body is a case where the vehicle is stopped in a horizontal state. For example, as described above, the support body is configured so that the posture of the support body becomes an inclined posture at the raised position or the lowered position. When the vehicle is lowered to the lowered position, the load applied to the vehicle is biased rearward, so that the vehicle becomes an inclined posture in which the rear portion is located below the front portion, and the posture of the support is horizontal or horizontal at the lower position. You may comprise so that a state may be approached.

(2) In the above embodiment, a wagon car is shown as an example of the vehicle V, and an example in which the vehicle elevating device L is mounted on the rear part of the wagon car is shown. The present invention can be applied to various vehicles such as passenger cars, buses, trucks, and the like, and the mounting location is not limited to the rear portion of the vehicle V. The base 1 can also be configured to be lowered to the outside of the lateral side of the vehicle V. Moreover, although the wheelchair C was shown as an example of a to-be-mounted body, the package etc. other than a wheelchair may be sufficient as a to-be-mounted body.

Perspective view of vehicle lifting device Plan view of the vehicle lifting device Exploded perspective view of quadruple link mechanism and cover Cross-sectional side view of quadruple link mechanism and cover An exploded perspective view showing the mounting portion and the holding body The top view which shows a support body and a front receiving body Partially cutaway plan view showing the placement section Side view of vehicle lifting device Side view of support Action diagram of rear support Side view showing potentiometer and detection link Vertical rear view of the mounting section Vertical rear view of the mounting section Side view showing movement of mounting part Action diagram showing posture change of swing member Hydraulic circuit diagram Control block diagram Diagram showing changes in potentiometer voltage

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mounting part 2 Support body 2a Bottom part (bottom plate part)
2b Side (side wall)
4 Quadruple link mechanism (link mechanism for lifting)
33 Guide rail A Guide support means C Mounted object (wheelchair)
F Floor G Ground V Vehicle

Claims (4)

A support configured to be movable up and down to a lowered position on or near the ground and a raised position located on the floor of the vehicle;
A mounting section configured to be freely mountable, and
Guiding support means for slidably guiding the mounting portion to an outer position on the vehicle outer side and an inner position on the vehicle inner side with respect to the support at the raised position of the support is provided. A vehicle lifting and lowering device,
The guide support means is configured to guide and support the mounting unit in a slidable manner along an inclined direction in which the height of the mounting unit is lower at the inward position than at the outer position. Elevating device for vehicles.   The vehicle elevating device according to claim 1, wherein a guide rail is provided on the floor of the vehicle for receiving and supporting the mounting portion slidably moved inward of the vehicle with respect to the support portion. The support is configured to include a bottom portion located below the mounting portion, and a pair of side portions erected from both lateral ends of the bottom portion so as to be positioned laterally of the mounting portion. The bottom portion of the support is configured to increase the thickness of the vehicle outer side portion than the vehicle inner side portion,
The vehicle elevating device according to claim 1 or 2, wherein the guide support means is configured to guide and support each of both ends in the width direction of the mounting portion with respect to the pair of side portions of the support. . The support is configured to move up and down to the raised position and the lowered position by a lifting link mechanism,
When the elevating link mechanism lowers the support body from the raised position to the lowered position, the elevating link mechanism raises the vehicle inner side relative to the vehicle outer side, 2. When the support body is raised from the lowered position to the raised position, the support body is configured to lower the vehicle inner side relative to the vehicle outer side. The vehicle lifting apparatus according to any one of claims 3 to 4.

Images