JP2011147694A - Chair structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair structure, having a structure that is easy to handle and capable of assisting transfer from a chair. <P>SOLUTION: The chair structure equipped with a seat part 21 includes a chair main body (wheelchair) 6 including the seat part, support mechanisms 2, 3, 4, and 5 installed on the chair main body, and an extensible seat surface 1 supported by the support mechanisms. The support mechanisms are composed to be extensible from a storage position where the extensible seat surface is disposed under the seat part to a developed position where it is extended from a front end of the seat part forward. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a wheelchair structure typified by a wheelchair, and more particularly to a structure including a transfer assisting tool that assists a transfer operation from a seat portion to a sofa or the like.

  When a wheelchair user performs "transfer", which is a movement operation from a wheelchair structure such as a wheelchair to a sofa or the like, a burden is great. In addition to the physical burden of being accompanied by a caregiver, there is also a mental burden of having to rely on others. Currently, transfer aids are being developed as a solution.

  As a conventional transfer assisting tool, a part of a wheelchair such as Japanese Patent Application Laid-Open No. 2002-360637 is responsible for transfer assistance, and a lift dedicated to transfer such as Japanese Patent Application Laid-Open No. 2003-175082 has been developed. However, in the case of JP 2002-360637, it is necessary to replace the wheelchair. In addition, in the case of Japanese Patent Application Laid-Open No. 2003-175082, a large transfer assisting tool is used, which is not suitable for carrying. Furthermore, since both require a helper, there is a problem that the transfer cannot be performed alone.

JP 2002-360637 A JP 2003-175082 A

  Currently, the most used transfer aid is a slide board, but it has poor portability and is inconvenient to carry. Moreover, since it is large, it is difficult to store it in a chair structure.

  As mentioned above, most of the currently developed transfer aids are separate from the transfer board and lift-like chair structure, or part of the wheelchair itself is a transfer device. Therefore, it is necessary to purchase a large-scale transfer assisting tool or a wheelchair with the transfer assisting tool. Alternatively, a large amount of processing is required for the wheelchair during installation. In addition, lifts cannot be carried.

  The problem to be solved by the present invention is to assist wheelchair users in transfer with a structure that is easy to handle.

In order to achieve the above object, the present invention provides a chair structure including a seat, a chair body including the seat, a support mechanism attached to the chair body, and a support mechanism. The support mechanism is configured so that the extended seat surface can be extended from a storage position disposed below the seat portion to a deployed position extending forward from the front end of the seat portion. It is characterized by being.
In particular, it is desirable that the support mechanism is detachably attached to the chair body by an attachment method or the like.

  As described above, since the extended seating surface is attached to the main body through the support mechanism, even one person can transfer stably. Also, when not in use, storing it does not get in the way, so you don't have to carry it around.

  In the present invention, the support mechanism can rotate the extended seat surface in the deployed position around the axis line by a shaft support portion having an axis extending along the seat surface of the seat portion on the seat portion side. It is preferable to support.

  Moreover, it is preferable that the said extended seat surface in the said expansion | deployment position is unevenly distributed to either the right or left in the width direction of the said seat part.

  Furthermore, it is preferable that the extended seat surface is configured by connecting a plurality of plates, and the length in the front-rear direction can be changed by changing the positional relationship between the plurality of plates. In this way, a part of the auxiliary tool is constituted by a plurality of plates and can be expanded and contracted, so that it can be stored more compactly.

  By carrying out the present invention, it becomes possible to assist transfer of a wheelchair user or the like. Since it is attached to the chair body such as a wheelchair, it is not necessary to carry it, and it can be stored under the seat except when transferring, so it does not get in the way. It is also possible to transfer alone.

It is a figure which shows the component of this invention. It is a figure which shows the assembled state of this invention. It is a figure which shows the state which attached this invention to the wheelchair. It is a figure which shows a mode that the user is using this invention. It is a figure which shows the mode in the middle of accommodating this invention. It is a figure which shows the state which accommodated this invention. It is a figure explaining the expansion seat surface by a multistage system. It is a figure which shows a mode that the expansion seat surface of a multistage system is folded. It is a figure which shows the state by which the extended seat surface of the multistage system was folded. It is a front view of the present invention. It is a figure which shows the mode of fixing with a some fixing tool. It is a figure which shows expansion | deployment of the extended seat surface by a slide. It is a figure which shows a mode that the extended seat surface by both-ends support is hold | maintained. It is a figure which shows the mode of reinforcement | strengthening by the flame | frame which can be folded, and fixation.

  The transfer aid of the present invention is fixed to a wheelchair structure such as a wheelchair. As a fixing method, fixing to a wheelchair structure frame is desirable. If the wheelchair frame shape is not suitable, it is fixed by attaching additional parts.

  About fixation, it can fix easily by using general parts, such as a bolt and a screw. In addition, it is possible to attach even a disposable item such as a binding band.

  A wheelchair 6 which is one of the wheelchair structures is mainly connected via a frame 22 to a wheelchair rear wheel 20 which can be moved by rotating, a wheelchair front wheel 19 which moves following the wheelchair, and a wheelchair seat 21 where a person sits. It is composed by being done.

  An example of the present invention is shown in FIG. FIG. 1 is an exploded perspective view showing components of the mechanism. 1 includes a rectangular extended seat surface 1 that is long in the front-rear direction on which the user sits down during transfer, and one end side of the extended seat surface 1 (the rear side, that is, a deployment position described later). The bearing portion 1a is provided along the seat portion 21 side, and a bearing surface rotating shaft 2 for receiving the extended seat surface 1 is inserted into the bearing portion 1a so as to be rotatable. ing. Furthermore, one end 2 a of the seat surface rotating shaft 2 (that is, the end on the side where the extended seat surface 1 described later is unevenly distributed) is fixed to the connecting portion 3. A rotating shaft 4 is inserted into the connecting portion 3 in a posture orthogonal to the seat surface rotating shaft 2, and is fixed to the fixing portion 5 via the rotating shaft 4 so as to be freely rotatable. This fixing part 5 supports the whole instrument by being fixed to the frame 22 of the wheelchair 6 shown in FIG. The frame 22 is provided with a vertical frame portion 22a extending downward from the front side of the seat portion 21, and the fixing portion 5 is fixed to the vertical frame portion 22a. A front wheel 19 is attached to the lower end of the vertical frame portion 22a.

  FIG. 2 shows the assembled state. The extended seating surface 1 rotates in the vertical direction about a seating surface rotation shaft 2 having a rotation center axis extending in the horizontal direction inserted through the bearing portion 1a which is an end portion. Further, the extended seating surface 1, the seating surface rotating shaft 2, and the connecting portion 3 fixed to one end 2a of the seating surface rotating shaft rotate in the horizontal direction around the rotating shaft 4 extending in the vertical direction.

  FIG. 3 shows a state where it is attached to a wheelchair. At the time of fixation, the auxiliary tool and the wheelchair are fixed by attaching the fixing portion 5 to the frame 22 of the wheelchair 6. In the example of FIG. 3, the vertical frame portion 22a extending in the vertical direction connected to the front wheel 19 of the wheelchair 6 is fixed, but the horizontal direction can be changed by changing the shape of the fixing portion 5 in accordance with the frame structure of the wheelchair to be attached. It can also be fixed to the frame part extending in the tilt direction.

  As an example of movement during use, as shown in FIG. 4, the extended seating surface 1 is disposed in front of the wheelchair 6 in a state of being extended so as to bridge the sofa or chair of the transfer destination (deployment position). At this time, the seat surface rotation shaft 2 is parallel to the front end portion of the seat surface of the wheelchair 6, and the extended seat surface 1 can rotate in the vertical direction with this shaft as a fulcrum. Thereby, even if there is a step between the seat surface of the seat portion 21 of the wheelchair 6 and the transfer destination, the bridge can be performed without any problem. Then, the user 7 sits on the extended seating surface 1 with the tip of the extended seating surface 1 placed on the transfer destination sofa or chair, and performs the transfer by sliding the buttocks. Alternatively, both feet are placed on the extended seat surface 1 in front of the wheelchair 6 and moved forward in a forward bent posture. As described above, the extended seat surface 1 is configured to be rotatable in the vertical direction at the deployed position, so that even when the user rides on the extended seat surface 1, the weight of the user is the wheelchair 6 and the sofa of the transfer destination. Since it is securely supported by both the wheelchair and the like, it is possible to prevent accidents during transfer such as the wheelchair 6 falling.

  In the example of FIG. 4, the extended seat surface 1 is unevenly distributed in the width direction of the seat portion 21 at the deployed position. That is, the extended seating surface 1 is arranged to be deviated forward of the left side of the seat part 21 (on the side of the connecting part 3, the rotation shaft 4 and the fixed part 5), and does not exist on the right side of the seat part 21. The width of the extended seating surface 1 is about two-thirds of the seating surface width of the wheelchair 6 in the illustrated example, but by reducing the width of the extended seating surface 1, the place where the user's 7 is swung around can be widened. It is possible. On the other hand, when the width of the extended seating surface 1 is widened, the transfer in the forward bending posture can be performed safely. Further, the shape of the extended seat surface 1 can be an arc shape in addition to the rectangular shape. For example, the extended seating surface 1 in the unfolded position can be configured to bend to the left or right from the front end of the seat portion 21 and extend obliquely forward.

  As for storage, first, the extended seat surface 1 held horizontally as shown in FIG. 5 is rotated downward about a seat surface rotating shaft 2 which is fixed so as to be rotatable on the bearing portion 1a side. Collapse. Then, as shown in FIG. 6, the connecting portion 3 connected to the extended seat surface 1, the seat surface rotating shaft 2, and the end 2 a of the seating surface rotating shaft 2 is inserted through the connecting portion 3 so as to be freely rotatable in the horizontal direction. The auxiliary tool is stored below (storing position) of the seat portion 21 of the wheelchair 1 by rotating inward (below the seat portion 21 of the wheelchair 6) around the rotating shaft 4. As a result, a space can be provided below the front end portion of the seat portion 21 of the wheelchair 6, so that the installation of the foot is not hindered when the wheelchair is running, and the extended seat surface 1 and the foot of the user 7 do not collide with each other. . In addition, since the seat surface rotation shaft 2 that allows the extended seat surface 1 to rotate freely is arranged in parallel with the traveling direction, the extended seat surface 1 does not flutter due to inertia or vibration during traveling. Wheelchair travel is performed in this state. This movement is performed in the reverse procedure for the transfer.

  In addition, the storage position of the extended seat surface 1 is not limited to the said aspect. For example, as shown in FIG. 5, the extended seating surface 1 may be hung downward from the front end side of the seat portion 21 as the storage position, or may be further rotated to the rear upper side as it is on the back side of the seat portion 21. It is good also considering the state arrange | positioned so that it may overlap as a storage position.

  As another example, the extended seat surface 1 can be configured by connecting a plurality of plates as shown in FIG. In the case of FIG. 7, a hinge portion capable of vertically rotating two plates of a base seat surface 1 ′ (configured in the same manner as the above-mentioned extended seat surface 1) and an extended seat surface 9 disposed at the front and rear in the deployed position. 8 is connected. With this configuration, the extended seating surface 9 further extends forward of the wheelchair 6 from the front end of the base seating surface 1 ′. Transfer is performed on these two connected plates. The hinge portion 8 can turn the extension seat surface 9 downward from the extended state in which the base seat surface 1 ′ and the extension seat surface 9 extend forward, but it cannot be turned upward. Therefore, it is possible to reliably support the weight of the user riding on the upper surface in the illustrated unfolded state. Thus, by constructing the extended seating surface in multiple stages, it is possible to make the seating surface compact and large. At the time of storing, the extension seat surface 9 is first rotated in the vertical direction by the hinge portion 8 as shown in FIG. 8 and folded downwardly on the base seat surface 1 '. Then, as shown in FIG. 9, after the extended seat surface 9 is completely folded below the base seat surface 1 ', the base seat surface 1' is rotated about the seat surface rotation axis 2 as described above to store. .

  As for the surface material of the extended seating surface 1, a material or surface treatment (eg, jersey fabric, denim fabric, cotton, acrylic, polyester, and a mixture thereof) that has low surface friction and is slippery. : Fluororesin system, coating, streaks due to surface processing), the frictional resistance during transfer can be suppressed, and smooth transfer can be performed. In addition, a material that does not slip easily is used for a part of the surface when the extended seat surface 1 is transferred, and a hand-attached portion makes it difficult for the hand to slip when supporting the body, thereby enabling more stable transfer.

  FIG. 10 is a front view of the auxiliary tool. In the above-described example, the extended seat surface 1, the seat surface rotating shaft 2, the connecting portion 3, and the rotating shaft 4 are cantilevered at the fixed portion 5 that fixes the wheel 22 to the frame 22. When a load is applied to the extended seating surface 1 at the time of transfer, stress concentrates around the connecting portion 3, the rotating shaft 4, and the fixing portion 5 that are the fundamental portions of the cantilever support fixing. As an example of avoiding this, force can be distributed by fixing the wheelchair to a plurality of places as well as the fixed portion 5 as shown in FIG. In the example of FIG. 11, the auxiliary connecting portion 10 is fixed to the opposite side of the end portion 2 a fixed to the connecting portion 3 of the seating surface rotating shaft 2, and the connecting portion 3 and the rotating shaft 4 are connected via the auxiliary connecting portion 10. The lower connecting portion 11 is attached so as to be rotatable in the horizontal direction in the same relationship as the fixing portion 5, and the lower rotating shaft 12 and the lower fixing portion 13 which are inserted through the connecting portion 11 and are horizontally rotatable are attached. The lower fixing portion 13 is fixed to the frame 22 of the wheelchair 6. More specifically, the lower stage fixing part 13 is fixed to a lower part of the vertical frame part 22a than the part to which the fixing part 5 is fixed. As a result, the auxiliary tool is fixed at two locations, the fixing portion 5 and the lower fixing portion 13.

  The fixing portion 5 can be constituted by a pipe-like component having a diameter that is slightly larger than that of the vertical frame portion 22 a that is fixed to the wheelchair 6. In this case, the pipe-shaped part is divided and fixed to the wheelchair 6 by assembling so as to sandwich or surround the vertical frame portion 22a. Since this fixing is possible if it is an annular shape like a pipe, it can be fixed not only by mechanical elements such as screws, bolts and rivets, but also by a binding wire.

  The extended seating surface 1 can be expanded in a range of approximately −45 ° to 45 ° in the horizontal direction when the front face is set to 0 ° centering on the rotation shaft 4 toward the front of the wheelchair seat portion 21. . For example, in FIG. 3, the extended seat surface 1 extends straight forward to the front in the deployed position, but by rotating about the rotating shaft 4, the expanded seat surface 1 is tilted forward left or right within the above angle range. It can also be configured to extend to. At this time, the seating surface rotation shaft 2 extending along the seating surface of the seating portion 21 corresponds to the direction within the above-mentioned angle range around the rotation shaft 4, and the seating portion 21 of the seating portion 21 is within the plane along the seating surface. The posture extends obliquely backward or obliquely forward with respect to the front edge.

  As shown in FIG. 12, the extended seating surface 1 can be configured to slide in the front-rear direction below the seat portion 21 of the wheelchair 6 by the slide portion 18 fixed to the vertical frame portion 22a. This also enables the expansion seat surface 1 to be deployed forward and the seat 21 of the wheelchair 6 to be stored below.

  It is also possible to fix the auxiliary tool to the wheelchair 6 by supporting both ends. In the example of FIG. 13, the fixing portion 5 is fixed to the left and right vertical frame portions 22 a and 22 c of the wheelchair 6. For example, the auxiliary support portion 14 is fixed to the vertical frame portion 22a to which the fixing portion 5 is fixed and the other vertical frame portion 22c at a symmetrical position in the left-right direction of the wheelchair 6, and the end of the seat surface rotating shaft 2 is fixed thereon. By placing (fitting) the end portion 2b opposite to the portion 2a in parallel with the front edge of the seat portion 21 of the wheelchair 6, the seat surface rotating shaft 2 is connected to the connecting portion 3 and the auxiliary support portion 14 at two locations. It becomes both ends support by. In this case, if the end portion 2b of the seating surface rotating shaft 2 is configured to be detachable from the auxiliary support portion 14, it can be configured without hindering the storing operation as shown in FIGS.

  As an example in which the wheelchair 6 is fixed to the frame 22 more firmly, reinforcing frames 15, 16, and 17 can be attached as shown in FIG. The reinforcing frame is attached below the seat portion 21 so as to cross the seat portion 21 in the width direction. By supporting the extended seat surface 1 (the bearing portion 1a thereof) and the seat surface rotating shaft 2 with this reinforcing frame, the support rigidity of the extended seat surface 1 can be increased. The reinforcing frame outer 15 and the reinforcing frame inner 16 constituting the reinforcing frame of the illustrated example are fixed by a reinforcing frame shaft 17 so as to be rotatable in the horizontal direction. By attaching the reinforcing frame constituted by these three to the lower frame portion of the seat portion of the wheelchair 6, folding of the wheelchair 6 (the wheelchair 6 is normally configured to be foldable in the left-right direction) is not hindered. And the frame part which can support the load of a perpendicular direction can be increased. Therefore, in addition to the above-described fixing structure, the auxiliary tool is also fixed to the reinforcing frame, thereby making it possible to perform strong fixing.

  The present invention can be used for all chair structures as long as the structure has a chair body that cannot be fixed by the fixing portion 5 of the transfer assisting tool.

1. 1. Extended seating surface 2. Bearing surface rotation axis Connecting part 4. 4. Rotating shaft Fixed part 6. Wheelchair 7. User 8. Hinge part 9. Extended seating surface 10. Auxiliary connecting part 11. Lower connection part 12. Lower rotating shaft 13. Lower stage fixing part 14. Auxiliary support 15. Outside the reinforcement frame 16. In the reinforcing frame 17. Reinforcing frame shaft 18. Slide part 19. Wheelchair front wheel20. Wheelchair rear wheel 21. Seat 22. flame

Claims (4)

  A chair structure including a seat includes a chair main body including the seat, a support mechanism attached to the chair main body, and an extended seat surface supported by the support mechanism. A chair structure characterized in that it can be extended from a storage position where the extended seat surface is disposed below the seat portion to a deployed position which extends forward from the front end of the seat portion.   The support mechanism is configured to support the extended seat surface in the deployed position so as to be rotatable around the axis line by a shaft support portion having an axis extending along the seat surface of the seat portion on the seat portion side. The chair structure according to claim 1, wherein the chair structure is characterized.   The chair structure according to claim 1 or 2, wherein the extended seating surface at the unfolded position is unevenly distributed on either the left or right side in the width direction of the seat.   The extended seat surface is configured by connecting a plurality of plates, and the length in the front-rear direction can be changed by changing the positional relationship between the plurality of plates. The chair structure according to any one of the above.

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