JP2005312628A - Fixing device for wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing device for a wheelchair whose structure is simplified. <P>SOLUTION: When hooks 50F and 50R are locked to the wheelchair 60 mounted on a platform 10 (floor) and a cable 32 (pulling member) is wound by a winding device 20, the wheelchair 60 is fixed to the platform 10. At the time of not fixing the wheelchair 60, a service bar 40 (fixing member) is housed inside the recessed part 12 of the upper surface of the platform 10. As a means for making the entire upper surface of the platform 10 including the recessed part 12 almost flat while the wheelchair 60 is not fixed, the service bar 40 is provided with a roughly flat area 43 to be roughly the same height as the upper surface of the platform 10 in the state of being housed in the recessed part 12, and thus the need of providing a lid is eliminated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wheelchair fixing device.

As an apparatus for fixing a wheelchair loaded on a vehicle, one disclosed in Patent Document 1 is known. This device has a winding device provided in a floor of a vehicle, an elongated fixing member provided with a hook for locking to a wheelchair frame, and flexibility for connecting the winding device and the fixing member. When the winding device is driven to wind the tension member while the hook is locked to the wheelchair frame, the fixing member pushes the wheelchair downward by the pulling of the tension member. A wheelchair is fixed to the floor. Further, a recess is provided on the upper surface of the floor, and when it is not necessary to fix the wheelchair, the fixing member is accommodated in the recess.
JP 2002-78741 A

  In the above-mentioned conventional device, as a means for making the entire upper surface of the floor including the concave portion substantially flush while the wheelchair is not fixed, a lid for closing the opening of the upper surface of the concave portion can be opened and closed on the floor. The lid is closed with the fixing member housed in the recess. However, this means requires a cover and a pivotal support means for supporting the cover on the floor, so that the structure is complicated.

  The present invention has been completed based on the above situation, and an object thereof is to simplify the structure.

  As means for achieving the above object, a winding device provided in a floor of a vehicle, a fixing member provided with a hook, and a flexible tension member that connects the winding device and the fixing member. The wheelchair is fixed to the floor by engaging the hook with the wheelchair placed on the floor and winding the tension member by driving the winding device. In addition, when the wheelchair is not fixed, the fixing device for the wheelchair is configured to receive the fixing member in a recess provided on the upper surface of the floor, and the outer surface of the fixing member is received in the recess. It is characterized in that there is provided a substantially flush region that is substantially the same height as the top surface of the floor in the above state.

  A second aspect of the invention is characterized in that, in the first aspect of the invention, the winding device is provided with a biasing means for biasing the tension member in the winding direction.

<Invention of Claim 1>
As a means for making the entire upper surface of the floor including the recess substantially flush while the wheelchair is not fixed, the fixing member is substantially flush with the upper surface of the floor in the state of being accommodated in the recess. Since the region is provided, it is not necessary to provide a lid, and the structure can be simplified.

<Invention of Claim 2>
Since the fixing member housed in the recess is held in the recess by the urging force applied to the pulling member in the winding direction, the fixing member is prevented from jumping out of the recess due to vibration during traveling. The

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The fixing device for wheelchairs of this embodiment is for fixing the wheelchair 60 loaded in the one box type vehicle W to the floor in a vehicle. In the following description, the forward and backward directions are based on the forward direction of the vehicle W, and the left and right directions are also based on the vehicle W.

  The vehicle W has a lift-back type back door D at its rear end, and a boarding / alighting device 70 is attached in the vicinity of the back door D in the vehicle. The lifting device includes a horizontal platform 10 on which a wheelchair 60 can be placed (a floor which is a constituent element of the present invention), an entry / exit position outside the vehicle on which the wheelchair 60 can be placed, and a storage position in a vehicle interior. It is made to displace between. The getting-on / off device 70 has a pair of left and right parallel link arms 71 whose base ends are supported by the vehicle body, and a pair of left and right support arms 72 whose upper ends are connected to the distal ends of the parallel link arms 71. 71 and 72 allow the platform 10 to move in parallel between a boarding / alighting position outside the vehicle shown in FIG. 1 and a storage position inside the vehicle shown in FIG. The upper surface of the platform 10 in the retracted position constitutes the floor of the vehicle W.

  The platform 10 is provided with a wheelchair fixing device for fixing the wheelchair 60 placed on the upper surface thereof. The wheelchair fixing device includes a winding device 20 provided in the platform 10, a service bar 40 (fixing member which is a constituent element of the present invention) locked to the wheelchair 60, and the service bar 40 on the winding device 20 side. A cable 32 (a tension member which is a constituent element of the present invention) for drawing the cable 32, a spring 29 (an urging means which is a constituent element of the present invention) for urging the cable 32 toward the winding device 20, and a service And a recess 12 for storing the bar 40.

Next, the winding device 20 will be described.
As shown in FIG. 5 (the left side is the front in FIGS. 5 and 6), the mounting space provided in the platform 10 can be rotated around the rotation shaft 22 in the vertical direction 4. Two pinions 21 are provided side by side in the front-rear direction, and a rack body 23 having rack teeth 24 that can be engaged with the four pinions 21 is provided to allow displacement in the front-rear direction (parallel direction of the pinions 21). It has been. A reduction gear 27 is connected to the output gear 26 of the motor 25 provided in front of the pinion 21, and a link 28 connected to the eccentric position of the reduction gear 27 is connected to the front end portion of the rack body 23. When the motor 25 is driven, the rack body 23 disengages the rack teeth 24 from the pinion 21 as shown in FIG. 5, and allows the rack teeth 24 to be freely rotated, and the rack teeth 24 as shown in FIG. Is engaged with the pinion 21 so as to reciprocate by a fixed stroke in the front-rear direction between the lock position where the rotation of the pinion 21 is restricted. Further, in the process in which the rack body 23 is displaced between the unlocking position and the locking position, the rack teeth 24 are displaced forward or backward while being engaged with the pinion 21, so that the pinion 21 is forward or backward by a certain angle. It is driven to rotate in the direction in which the cable 32 is wound and fed out.

  Each pinion 21 and the rotary shaft 22 are fixed so as to rotate integrally, and a spring 29 made of a spiral spring is disposed coaxially with the pinion 21 above each pinion 21. An end portion on the center side of the spring 29 is connected so as to rotate integrally with the rotation shaft 22 of the pinion 21, and an end portion on the outer peripheral side of the spring 29 is fixed to a spring case 30 fixed to the platform 10. Has been. Further, as shown in FIG. 5, a concentric circular reel 31 is fixed to each pinion 21 so as to be integrally rotatable, and each reel 31 has a base end of a cable 32 formed by twisting metal thin wires. Is fixed. When the pinion 21 rotates counterclockwise in FIGS. 5 and 6, the cable 32 is wound around the reel 31, and when the pinion 21 rotates clockwise in FIGS. 5 and 6, the cable 32 is unwound from the reel 31. It has become. Each cable 32 is biased in the winding direction by the bias of the spring 29. That is, the pinion 21 and the reel 31 are also urged in the winding direction (counterclockwise direction in FIGS. 5 and 6) by the urging of the spring 29.

  Two symmetrical service bars 40 are used for fixing one wheelchair 60. Hereinafter, what is arranged on the right side will be described, but description on the left side will be omitted. As shown in FIG. 8, the service bar 40 includes a main body 41 that is elongated in the front-rear direction as a whole, and a grip 42 that extends obliquely rearward from the rear end side of the main body 41. The two front and rear hooks 50F and 50R are attached.

  The upper surface of the main body 41 is a substantially flush area 43 over almost the entire area. In addition, the grip 42 extends obliquely left rearward from the rear end of the main body 41, so that when the hooks 50 </ b> F and 50 </ b> R are locked to the wheelchair 60, the hand holding the grip 42 is attached to the wheelchair 60. You can avoid hitting. Further, the grip 42 is located slightly lower than the main body 41.

  The main body 41 is formed with a guide groove 44 </ b> F that opens in the right side surface (that is, the side surface on which the hooks 50 </ b> F and 50 </ b> R are located) elongated in a front-rear direction and linearly. As shown in FIG. 13, the upper and lower surfaces of the guide groove 44 </ b> F have a tapered shape in which the vertical distance gradually increases toward the right. In addition, a relief space 45F that is elongated in the front-rear direction and extends linearly is formed in the main body 41 by notching a region close to the left side surface thereof. The guide groove 44F and the escape space 45F communicate with each other, and the formation region of the guide groove 44F and the escape space 45F is a wide range from the vicinity of the front end of the main body 41 to a position slightly ahead of the rear end. The vertical dimension of the escape space 45F is larger than the vertical dimension of the guide groove 44F, and due to this dimensional difference, a pair of upper and lower arcs elongated in the front-rear direction on the upper and lower sides of the opening of the guide groove 44F on the right inner surface of the escape space 45F. A cross-sectional support surface 46F is formed. Further, as shown in FIG. 14, a substantially circular attaching / detaching hole 47F having the same size as or slightly smaller than the vertical dimension of the escape space 45F is formed at the rear end portion of the guide groove 44F. Furthermore, a locking projection 48F is formed at a position adjacent to the front of the attachment / detachment hole 47F in the guide groove 44F, with the lower inner surface protruding upward. The escape space 45F is opened on the left side of the main body 41 only in most of the regions, that is, the front end side region, the center region, and the rear end side region including the attachment / detachment hole 47F and the locking projection 48F. Yes. That is, on the left side surface of the main body 41, the reinforcing portion includes two positions in the opening area of the escape space 45F, the position between the front end side area and the central area and the position between the center area and the rear end side area. 49, the main body 41 is maintained rigid by the reinforcing portion 49.

  In addition, a support groove 44 </ b> R is formed at the rear end portion of the main body 41 and is located in a region behind the guide groove 44 </ b> F and opens on the right side surface of the main body 41. The support groove 44R is shorter than the guide groove 44F but extends in the front-rear direction. Further, the main body 41 is formed with an escape groove 45R corresponding to the support groove 44R and opening on the left side surface of the main body 41. The upper and lower surfaces of the support groove 44R are parallel to each other, and the horizontal dimension of the support groove 44R is set longer than the horizontal dimension of the guide groove 44F. Similarly, an escape groove 45R corresponding to the support groove 44R and having the left side surface of the main body 41 cut away is formed at the rear end of the main body 41. The escape groove 45R is long in the front-rear direction and communicates with the support groove 44R. The vertical dimension of the relief groove 45R is larger than the vertical dimension of the support groove 44R, and due to this dimensional difference, a pair of upper and lower arcs elongated in the front-rear direction on the upper and lower sides of the opening of the support groove 44R on the right inner surface of the escape groove 45R. A support surface 46R having a cross section is formed. Further, a substantially circular attachment / detachment hole 47R having the same size as or slightly smaller than the vertical dimension of the escape groove 45R is formed at the front end of the support groove 44R. Furthermore, a locking projection 48R having a form in which the lower inner surface of the support groove 44R protrudes upward is formed at a position adjacent to the rear of the attachment / detachment hole 47R in the support groove 44R.

  Both the front and rear hooks 50F and 50R are the same, are made of an elongated metal material, and are curved flange portions 51F and 51R, and connecting portions 52F and 52R extending from the base ends of the flange portions 51F and 51R. The shaft portions 53F and 53R extend leftward from the base ends of the flange portions 51F and 51R, and the enlarged diameter portions 54F and 54R are formed at the extended ends of the shaft portions 53F and 53R. The cross-sectional shape of the shaft portions 53F and 53R is generally a semi-cylindrical shape, that is, a shape in which the outer peripheral side portion of a perfect circle is cut into a comb shape, and the outer peripheral surfaces of the shaft portions 53F and 53R are configured by an arcuate surface and a flat surface. Has been. Further, the enlarged diameter portions 54F and 54R have a circular shape substantially concentric with the shaft portions 53F and 53R. The flange portions 51F and 51R are curved along a two-dimensional plane parallel to the axis of the shaft portions 53F and 53R, or a two-dimensional plane including the axis of the shaft portions 53F and 53R. The connecting portions 52F and 52R extend in an oblique direction with respect to the axis of the shaft portions 53F and 53R so as to be along a two-dimensional plane including the curved path of the flange portions 51F and 51R.

  The front hook 50F is attached to the main body 41 with the shaft portion 53F passing through the guide groove 44F and the enlarged diameter portion 54F being escaped and accommodated in the space 45F. In the mounted state, the enlarged diameter portion 54F abuts on the support surface 46F and the base end portion of the flange portion 51F abuts on the right side surface of the main body 41, so that the front hook 50F has a slight stroke with respect to the main body 41. It can be displaced in the left-right direction (the axial direction of the shaft portion 53F). Further, since the guide groove 44F and the escape space 45F extend in the front-rear direction, the front hook 50F can freely slide in the front-rear direction with respect to the main body 41 while being guided by the guide groove 44F.

  Further, since the maximum outer diameter dimension of the shaft portion 53F is smaller than the vertical dimension of the guide groove 44F and the outer diameter of the enlarged diameter section 54F is larger than the vertical dimension of the escape space 45F, the front hook 50F is as shown in FIG. The shaft portion 53F can be freely rotated around the shaft portion 53F in the left-right direction, and can be swung and displaced so that the axis of the shaft portion 53F is tilted up and down in any rotational posture. Since the guide groove 44F and the escape space 45F are elongated in a continuous manner in the front-rear direction, the front hook 50F can be swung so that the shaft portion 53F is inclined in the front-rear direction.

  The rear hook 50R is attached to the main body 41 with the shaft portion 53R penetrating the support groove 44R and the enlarged diameter portion 54R escaped and accommodated in the groove 45R. In the mounted state, the enlarged diameter portion 54R abuts on the support surface 46R, and the base end portion of the flange portion 51R abuts on the right side surface of the main body 41, so that the rear hook 50R has a slight stroke with respect to the main body 41. It can be displaced in the left-right direction (the axial direction of the shaft portion 53R). Further, the maximum outer diameter dimension of the shaft portion 53R is smaller than the vertical dimension of the support groove 44R, and the outer diameter of the enlarged diameter portion 54R is larger than the vertical dimension of the escape groove 45R. As shown in FIG. 15, the shaft portion 53R can be swung and displaced so that the axis of the shaft portion 53R is tilted up and down as shown in FIG. Since the support groove 44R and the escape groove 45R are elongated in a continuous manner in the front-rear direction, the rear hook 50R can be swung so as to tilt the shaft portion 53R in the front-rear direction. In addition, since the upper and lower surfaces of the guide groove 44F of the front hook 50F are tapered and the horizontal dimension of the guide groove 44F of the front hook 50F is smaller than the support groove 44R, the neck of the front hook 50F in the vertical direction is reduced. The maximum swingable angle is larger than the maximum swingable angle of the rear hook 50R in the vertical direction.

  Further, when the rear hook 50R is in a posture (see FIG. 16) in which the flange portion 51R is positioned above the shaft portion 53R (see FIG. 16), the arcuate surface of the shaft portion 53R is formed on the support groove 44R as shown in FIG. The locking projection 48R protrudes from the lower surface of the support groove 44R while being in contact with the lower surface and having a large space between the flat surface of the shaft portion 53R and the upper surface of the support groove 44R. Thus, the shaft portion 53R can interfere. Therefore, when the shaft portion 53R in the support groove 44R is displaced forward, the shaft portion 53R is restricted from being displaced toward the attachment / detachment hole 47R by striking the locking projection 48R, and remains in the support groove 44R. The rear hook 50R cannot be removed from the main body 41.

  Contrary to this, as shown in FIG. 17, the rear hook 50R has a posture in which the flange portion 51R is positioned below the shaft portion 53R (an posture in which the connecting portion 52R is positioned above the shaft portion 53R). When this occurs, the arcuate surface of the shaft portion 53R comes into contact with or approaches the upper surface of the support groove 44R, and there is a large space between the flat surface of the shaft portion 53R and the lower surface of the support groove 44R. Thus, the shaft 53R can avoid interference with the locking protrusion 48R protruding from the lower surface of the support groove 44R. Therefore, when the shaft portion 53R in the support groove 44R is displaced forward, the shaft portion 53R can pass through this and be displaced into the attachment / detachment hole 47R without hitting the locking projection 48R (see FIG. 21). In this state, the enlarged diameter portion 54R is detached from the support surface 46R, so that the rear hook 50R can be removed from the main body 41 to the right.

  Although not shown, the front hook 50F also has the shaft portion 53F in the guide groove 44F in the rear when the collar portion 51F is positioned higher than the shaft portion 53F in the same manner as the rear hook 50R. Even if it is displaced to the end, the displacement toward the attachment / detachment hole 47F is restricted by the shaft portion 53F coming into contact with the locking projection 48F, so that it remains in the guide groove 44F. Therefore, the front hook 50F cannot be removed from the main body 41. On the contrary, when the front hook 50F is in a posture in which the flange portion 51F is positioned below the shaft portion 53F (an posture in which the connecting portion 52F is positioned above the shaft portion 53F), the shaft portion 53F. Can be displaced into the attachment / detachment hole 47F without hitting the locking projection 48F, and the front hook 50F can be removed from the main body 41 to the right.

  As shown in FIG. 1, a pair of left and right recesses 12 for receiving the service bar 40 when the wheelchair 60 is not fixed is provided on the upper surface of the platform 10. The recess 12 is obtained by partially denting the upper surface plate 11 constituting the upper surface of the platform 10 with a press or the like. As shown in FIG. 3, in the state where the wheelchair 60 is placed on the upper surface of the platform 10, the recess 12 is configured to lock hooks 50 </ b> F and 50 </ b> R disposed on the inner side of the wheel 62 of the wheelchair 60. It is located further inside (closer to the center) than the existing frame 61.

  As shown in FIG. 4 (upward is the front in FIG. 4), the recess 12 is elongated in the front-rear direction, and receives the main body 41 of the service bar 40 without large backlash in the left-right direction; The grip housing portion 14 for housing the grip 42, the front hook housing portion 15 for housing the front hook 50F, and the rear hook housing portion 16 for housing the rear hook 50R. A widened portion 17 is formed in the grip accommodating portion 14 so that an operator's finger can be inserted when the grip 42 is taken out. In addition, a pulley accommodating portion 18 is formed at the front end portion of the front hook accommodating portion 15, and a pulley 33 having an axis substantially in the left-right direction is rotatably accommodated in the pulley accommodating portion 18. On the other hand, a pulley accommodating portion 18 is also formed at the rear end portion of the rear hook accommodating portion 16, and the pulley 33 having an axis substantially in the left-right direction is rotatably accommodated in the pulley accommodating portion 18.

  In a state where the service bar 40 is accommodated in the recess 12 (accommodating portion), as shown in FIG. 7, the substantially flush area 43 on the upper surface of the main body 41 is substantially the same height, that is, flush with the upper face of the platform 10. The upper surface of the grip 42 is lower than the upper surface of the platform 10. Further, the front hook 50F and the rear hook 50R are in a posture (sleeping posture) in which the curved paths of the flange portions 51F and 51R are inclined so as to be substantially parallel to the upper surface of the platform 10, and are lower than the upper surface of the platform 10. Is housed in. That is, the service bar 40 is substantially flush with the upper surface of the platform 10, and a part of the service bar 40 does not protrude toward the upper surface side of the platform 10.

  Further, the cables 32 fed out from the reels 31 of the winding device 20 are wound around the pulleys 33 and fixed to the extending ends of the connecting portions 52F and 52R of the hooks. At this time, since the flange portion 51F of the front hook 50F is positioned rearward of the shaft portion 53F and the flange portion 51R of the rear hook 50R is positioned forward of the shaft portion 53R, the cable 32 is connected from each of the connecting portions 52F and 52R. They are connected in a natural form that is derived almost straight. Since the urging force in the winding direction is applied to the cable 32 by the spring 29 as described above, the urging force of the spring 29 holds the front hook 50F at the standby position at the front end of the guide groove 44F. The hook 50R is held at the rear end position of the support groove 44R. The hooks 50F and 50R are accommodated in predetermined hook accommodating portions 15 and 16 while being held by the bias of the spring 29.

  The wheelchair 60 has a frame 61 that supports a pair of left and right wheels 62 and a seating portion 63. The frame 61 is a pair of left and right horizontal frames 61H which are lower than the axle 64 of the wheel 62 and located on the inner side (near the center) of the wheel 62 and elongated in the front-rear direction, a front frame 61F rising from the horizontal frame 61H, and a horizontal frame The rear frame 61R stands up from a position behind the front frame 61F in 61H and supports the axle 64 of the wheel 62. A portion where the horizontal frame 61H and the front frame 61F are connected at a right angle is a front locking portion 65F, and a portion where the horizontal frame 61H and the rear frame 61R are connected at a right angle is a rear locking portion 65R. The front locking portion 65F is positioned rearward of the pulley 33 on the front side of the concave portion 12, and the rear locking portion 65R is positioned forward of the pulley 33 on the rear side of the concave portion 12.

Next, the operation of this embodiment will be described.
When the wheelchair 60 is not fixed, the service bar 40 is stored in the recess 12. At this time, in the winding device 20, even when the rack teeth 24 of the rack body 23 are not engaged with the pinion 21, the front hook 50 </ b> F is pulled by the urging force in the winding direction applied to the cable 32 by the spring 29. Since the rear hook 50R is pulled rearward, the service bar 40 is held in the retracted state without floating upward from the recess 12. The rack teeth 24 of the rack body 23 may be engaged with the pinion 21 to lock the cable 32 so that it cannot be fed out.

  When the wheelchair 60 placed on the platform 10 is fixed, first, the cable 32 is set in a state where the cable 32 can be extended (a state where the rack teeth 24 are detached from the pinion 21), and a finger is placed in the widened portion 17. The grip 42 is inserted and the service bar 40 in the recess 12 is lifted up as shown in FIG. At this time, the front and rear hooks 50F and 50R are in a positional relationship that is most separated in the front-rear direction. Then, while moving the lifted service bar 40 rearward, the front end thereof is brought close to the front locking portion 65F of the wheelchair 60, and as shown in FIGS. 9 and 11, the flange portion 51F of the front hook 50F is moved to the front locking portion. Lock from 65F diagonally from above. During this time, the front hook 50F is elastically pulled diagonally forward and downward by the cable 32. Therefore, the front hook 50F is held at the standby position at the front end of the guide groove 44F, and has a flange portion with the shaft portion 53F as a fulcrum. 51F is stably held in a posture that tilts backward. Therefore, the operation of locking the front hook 50F to the front locking portion 65F can be performed easily and reliably.

  Thereafter, the service bar 40 is entirely displaced forward to bring the rear hook 50R closer to the rear locking portion 65R. At this time, the front hook 50F already locked to the wheelchair 60 slides backward relative to the service bar 40 while being guided by the guide groove 44F. As shown in FIG. 11, the service bar 40 is tilted to the left (near the center) with the locked front hook 50F as a fulcrum so that the rear hook 50R does not interfere with the horizontal frame 61 or the rear frame 61. However, since the front hook 50F can swing up and down and right and left with respect to the main body 41, there is no twist between the front hook 50F and the frame 61 of the wheelchair 60.

  Then, as shown in FIGS. 10 and 12, the rear hook 50R is locked to the rear locking portion 65R obliquely from the upper front. During this time, the rear hook 50R is elastically pulled downward and obliquely downward by the cable 32. Therefore, the rear hook 50R is held at a position where it abuts against the rear end of the support groove 44R, and the shaft portion 53R is used as a fulcrum. The collar portion 51R is stably held in a posture that tilts forward. Therefore, the operation of locking the rear hook 50R to the rear locking portion 65R can be easily and reliably performed.

  When the front and rear hooks 50F and 50R are locked to the wheelchair 60 in this way, the service bar 40 is elastically pulled toward the platform 10 (downward) by the bias of the spring 29. Even if the hand is released, the front hook 50F and the rear hook 50R are not detached from the wheelchair 60. After releasing the hand from the service bar 40, the motor 25 of the winding device 20 is driven. Then, the rack teeth 24 of the rack body 23 are engaged with the pinion 21, and the pinion 21 rotates and the cable 32 is wound up in the process of engagement, whereby the slackened cable 32 is in a tension state. When the rack body 23 moves to a predetermined position, the motor 25 is stopped, the pinion 21 is locked so as not to rotate, and as a result, the cable 32 is locked so as not to be fed out. Accordingly, the hooks 50F and 50R are locked in a state of being locked with respect to the locking portions 65F and 65R, and the wheelchair 60 is fixed in a state of being placed on the upper surface of the platform 10.

  When releasing the fixation of the wheelchair 60 from this state, the motor 25 is driven to move the rack teeth 24 in the direction to remove from the pinion 21. In this process, the pinion 21 rotates and the cable 32 is slightly fed out, and the motor 25 stops when the rack tooth 24 is detached from the pinion 21. As a result, the pinion 21 becomes free to rotate, and the winding operation by the urging of the spring 29 of the cable 32 and the feeding operation against the urging of the spring 29 of the cable 32 are allowed. From this state, the rear hook 50R is removed from the rear locking portion 65R by moving the grip 42 obliquely forward and upward. Thereafter, the front hook 50F is slid forward relative to the main body 41 by moving the service bar 40 backward. When the front hook 50F reaches the standby position at the front end and further sliding operation is restricted, the front end of the service bar 40 is lifted obliquely rearward and upward, and the front hook 50F is removed from the front locking portion 65F.

  After removing the front and rear hooks 50F, 50R from the wheelchair 60 in this way, the service bar 40 is accommodated in the recess 12 in accordance with the bias of the spring 29 applied to the cable 32. During this time, the front hook 50F changes its posture so as to tilt the collar portion 51F backward by being pulled by the cable 32, and the rear hook 50R is postured so as to tilt the collar portion 51R forward by being pulled by the cable 32. Therefore, the hooks 50F and 50R are smoothly stored in the hook accommodating portions 15 and 16 without being caught.

  In addition, another wheelchair (not shown) in which the front-rear distance between the front locking part 65F and the rear locking part 65R is larger than the maximum separation distance between the front and rear hooks 50F, 50R of the service bar 40 of this embodiment. When fixing, it replaces | exchanges for another service bar (not shown) which can set the largest space | interval of both front and rear hooks larger than the thing of this embodiment. The service bar to be replaced is obtained by extending the guide groove 44F of the service bar 40 of this embodiment forward, and the other configuration is the same as that of the service bar 40 of this embodiment.

  When replacing the service bar 40, the hooks 50F and 50R are removed from the main body 41. At this time, the hooks 50F and 50R are rotated with the shaft portions 53F and 53R as fulcrums, and the flange portions 51F and 51R are positioned below the shaft portions 53F and 53R (the connecting portions 52F and 52R with the cable 32 are the shaft portions). 53F and 53R), that is, a posture reversed upside down from the posture in normal fixing work. In this state, the shaft portions 53F and 53R in the guide groove 44F or the support groove 44R are slid toward the attachment / detachment holes 47F and 47R. At this time, since the shaft portions 53F and 53R are located above the locking projections 48F and 48R, the shaft portions 53F and 53R pass through the locking projections 48F and 48R and reach the attachment holes 47F and 47R. can do. Thereafter, when the hooks 50F, 50R are pulled rightward from the main body 41, the enlarged diameter portions 54F, 54R pass through the attachment / detachment holes 47F, 47R, and the hooks 50F, 50R are detached from the service bar 40.

  Thereafter, the hooks 50F and 50R are attached to the new service bar. At this time, the hooks 50F and 50R are placed in a posture (the cable 32 and the cable 32 are positioned below the shafts 53F and 53R in the same manner as described above. With the connecting portions 52F and 52R in an attitude that is above the shaft portions 53F and 53R), the enlarged diameter portions 54F and 54R are inserted into the attachment / detachment holes 47F and 47R, and the postures of the hooks 50F and 50R are maintained as they are. The portions 53F and 53R may be slid toward the guide groove 44F or the support groove 44R. After that, the hooks 50F and 50R are turned upside down, and the hooks 50F and 50R cannot be detached from the service bar 40 if the hooks 51F and 51R return to the posture positioned above the shafts 53F and 53R. It is attached.

According to the present embodiment, the following operations and effects are achieved.
(1) When the wheelchair 60 is not fixed, the service bar 40 is accommodated in the recess 12 provided on the upper surface of the platform 10, and the outer surface (upper surface) of the main body 41 of the service bar 40 is provided on the recess 12. A substantially flush region 43 is provided that is substantially the same height as the top surface of the platform 10 in the state of being accommodated in the platform. By providing such a substantially flush area 43, the entire upper surface of the platform 10 including the recess 12 can be made substantially flush while the wheelchair 60 is not fixed even if the recess 12 is not provided with a lid. it can.

  (2) Since the winding device 20 is provided with the spring 29 as an urging means for urging the cable 32 in the winding direction, the service bar 40 accommodated in the recess 12 is attached to the cable 32. It is held in the recess 12 by the urging force in the winding direction. Therefore, the service bar 40 is prevented from jumping out of the recess 12 due to vibration during traveling.

  (3) When the wheelchair 60 is fixed, first, the front hook 50F is locked to the wheelchair 60, and then the direction of the service bar 40 is moved up, down, left and right with the locking position of the locked front hook 50F as a fulcrum. The rear hook 50R is locked to the wheelchair 60 while being operated so as to be inclined, but the locked front hook 50F can be displaced relative to the service bar 40 in a swinging manner. When tilting up, down, left and right, there is no twist between the locked front hook 50F and the wheelchair 60, and the work of changing the direction of the service bar 40 can be performed smoothly. Further, since the postures of the hooks 50F and 50R are stabilized by the bias of the spring 29, the hooks 50F and 50R can be easily and reliably locked to the wheelchair 60 without causing wobbling. Can do.

  (4) The cable 32 is connected to the hooks 50F and 50R, and the spring 29 is provided in the winding device 20 to bias the cable 32 in the winding direction. As a result, the hooks 50F and 50R are elastically pulled to the upper surface side of the platform 10 via the cable 32 by the spring 29, so that the hooks 50F and 50R are changed even if the orientation and posture of the service bar 40 change. Is kept in a substantially constant posture, and the operation of locking to the wheelchair 60 becomes easy.

  (5) Since one hook 50F is slidable with respect to the service bar 40, a plurality of types of wheelchairs 60 having different intervals between the locking positions of the two hooks 50F and 50R can be fixed. In addition, the slidable front hook 50 </ b> F is held in the standby position at the front end by the spring 29 without moving in the slide area, so that the locking operation to the wheelchair 60 can be performed smoothly. Furthermore, since the spring 29 serves as a means for stabilizing the postures of the hooks 50F and 50R and a means for holding the front hook 50F in the standby position, the structure can be simplified.

  (6) Since the spring 29 for holding the slidable front hook 50F in the standby position is provided not in the service bar 40 but in the winding device 20 in the platform 10, the service bar 40 can be reduced in weight. It becomes possible. Thereby, the workability | operativity improvement at the time of pinching the service bar 40 and latching the hooks 50F and 50R to the wheelchair 60 can be aimed at.

  (7) The hooks 50F and 50R are supported so that they can be displaced relative to the service bar 40, and the hooks 50F and 50R are attached to and detached from the service bar 40 by engaging the service bar 40 and the hooks 50F and 50R with each other. Locking means (shaft portion) that can be regulated and allows the hooks 50F and 50R to be attached to and detached from the service bar 40 only when the hooks 50F and 50R take a predetermined displacement form within the displacement region. 53F, 53R and locking projections 48F, 48R) are provided. Therefore, the hooks 50F and 50R can be attached to and detached from the service bar 40 by setting the hooks 50F and 50R to a predetermined displacement form with respect to the service bar 40, and the hooks 50F and 50R attached to the service bar 40 can be attached. When it is displaced to a form other than the detachable displacement form, the hooks 50F, 50R are held attached to the service bar 40. According to this embodiment, when attaching / detaching the hooks 50F, 50R to / from the service bar 40, laborious work such as tightening or loosening the screws is unnecessary, so that workability is good.

  (8) A spring that biases the cable 32 to the winding device 20 in the winding direction after supporting the hooks 50F and 50R so as to rotate around the shaft portions 53F and 53R intersecting the pulling direction by the spring 29. 29, and the cable 32 is connected to the hooks 50F and 50R, so that the hooks 50F and 50R are urged by the springs 29 in the direction of being pulled toward the platform 10 side. In the displacement form in which the locking means (the shaft portions 53F, 53R and the locking projections 48F, 48R) are unlocked and the hooks 50F, 50R can be attached and detached, the hooks 50F, 50R are biased by the spring 29. This is a generally upside down configuration when pulled to the platform 10 side. Therefore, it is possible to reliably prevent the hooks 50F and 50R from coming off the service bar 40.

<Other embodiments>
The present invention is not limited to the embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  (1) In the above embodiment, the service bar (fixing member) is held in the recess by the biasing means. However, according to the present invention, the cable (tensile member) is fed out by the locking means provided in the winding device. The service bar may be held in the recess by restricting the movement.

  (2) In the above embodiment, the cable (tensile member) is connected to the hook. However, according to the present invention, the cable may be connected to the main body of the service bar (fixing member).

  (3) In the above embodiment, the service bar (fixing member) is in the shape of a long and narrow bar. However, according to the present invention, the fixing member may be plate-shaped. In this case, four hooks can be attached to one fixing member.

  (4) In the above embodiment, the tension member is a cable in which metal wires are twisted together. However, according to the present invention, the tension member may be a cloth belt.

  (5) In the above embodiment, the case where the floor on which the wheelchair is placed is a movable platform for loading and unloading the wheelchair on the vehicle has been described. However, in the present invention, the floor is fixed to the vehicle body. It is also applicable when

  (6) In the above embodiment, only one of the two front and rear hooks is slidable. However, according to the present invention, both the two hooks may be slidable.

The perspective view showing the whole structure of Embodiment 1. Side view of a wheelchair placed on the floor Top view of a fixed wheelchair A plan view of the state in which the fixing member is accommodated in the recess of the floor A plan view showing a state in which the tension member can be wound and unwound in the winding device. A plan view showing a locked state in which the winding and feeding of the tension member are restricted in the winding device Cross section of winding device Partial enlarged side view showing the work process of fixing a wheelchair Partial enlarged side view showing the state where the front hook is locked to the wheelchair in the process of fixing the wheelchair Partial enlarged side view showing the state where the wheelchair is fixed Partial enlarged plan view showing a state where the front hook is locked to the wheelchair in the process of fixing the wheelchair. Partial enlarged plan view showing a state where the wheelchair is fixed. Partial enlarged rear view showing the front hook locked to the wheelchair Side view of fixing member Partial enlarged sectional view showing means for supporting the rear hook on the fixing member Partial enlarged view of FIG. Partial enlarged sectional view showing a state in which the hook is in a posture capable of being detached from the fixing member. Sectional view showing the state where the rear hook is removed from the fixing member Partial enlarged sectional view showing means for supporting the front hook on the fixing member Partial enlarged side view showing a state in which the rear hook is supported by the fixing member Partially enlarged side view showing a state in which the rear hook is turned upside down to be detachable from the fixing member

Explanation of symbols

10 ... Platform (floor)
12 ... Recess 20 ... Winding device 29 ... Spring (biasing means)
32 ... Cable (tensile member)
40 ... Service bar (fixed member)
43 ... Approximate area 50F, 50R ... Hook 60 ... Wheelchair

Claims (2)

A winding device provided in the floor of the vehicle;
A fixing member provided with a hook;
A tension member having flexibility for connecting the winding device and the fixing member;
The wheelchair is fixed to the floor by locking the hook to the wheelchair placed on the floor and winding the tension member by driving the winding device.
When the wheelchair is not fixed, the wheelchair fixing device is adapted to accommodate the fixing member in a recess provided on the upper surface of the floor,
The wheelchair fixing device according to claim 1, wherein a substantially flush area is provided on the outer surface of the fixing member that is substantially the same height as the upper surface of the floor in the state of being accommodated in the recess. The wheelchair fixing device according to claim 1, wherein the winding device is provided with biasing means for biasing the tension member in the winding direction.

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