JP4313584B2 - wheelchair - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a wheelchair used for a physically handicapped person, an elderly person, an injured person or the like.
[0002]
[Prior art and problems to be solved by the invention]
Wheelchairs are used by those who have difficulty walking, but are not used as simple chairs for sitting, but are used as moving means for moving instead of walking. Therefore, if the dimensions of each part of the wheelchair do not match the size of the user's body, it will be difficult for the user to use and cause fatigue.
A wheelchair is used by a user while sitting down. Of the dimensions of each part of the wheelchair, the width dimension of the seat is particularly required to match the size of the user's body. . Therefore, if the width dimension of the seat is adjusted, a comfortable wheelchair with less fatigue for the user is provided.
[0003]
Conventional wheelchairs are provided with a function of adjusting the width of the seat. Generally, a wheelchair includes a frame body that constitutes a skeleton of the wheelchair. Conventionally, the width dimension of the seat portion is adjusted by adjusting the width dimension of the frame body. FIG. 6 is a front view of a frame body applied to a conventional wheelchair.
[0004]
As shown in the figure, the frame body 1 includes a main frame 2 and a seat frame 3. These are comprised from the member of circular pipe shape, for example.
In addition to the connecting portion 4 to which the seat frame 3 is connected, the main frame 2 is attached with wheels, a back frame and the like not shown. The seat frame 3 includes a pair of side members 5 and a cross member 6. An upper end portion of each cross member 6 is connected to each side member 5, and a lower end portion of each cross member 6 is connected to the connection portion 4 of the main frame 2. For the connection between the connecting portion 4 and the lower end portion of the cross member 6, for example, a structure that is fastened using a bolt is employed.
[0005]
Further, an auxiliary member 8 for connecting the cross member 6 and the main frame 2 is provided. The auxiliary member 8 is rotatably connected to the cross member 6 and the main frame 2 by a connecting pin 9. The auxiliary member 8 is for maintaining the geometric positional relationship between the main frame 2 and the seat frame 3.
Note that a seating surface forming sheet is attached to the side member 5 so that a seating surface is formed. That is, this side member 5 functions as a seat surface partition member for partitioning the seat surface of the wheelchair.
[0006]
The cross members 6 are pivotably connected to each other via a rotation pin 7 at the center thereof, and as shown in the figure, the cross members 6 are crossed. For example, when the seat width is narrowed from the state shown in the figure, first, each cross member 6 is rotated around the rotation pin 7 to reduce the crossing angle. Thereby, the space | interval of a pair of side member 5 becomes small, and a seat width becomes narrow.
[0007]
However, in this case, since each side member 5 is lifted upward, the position of the seat surface becomes relatively high. Therefore, next, each cross member 6 is moved downward and is fastened to the connecting portion 4 again in that state. Thus, the seat width is changed without changing the seating surface height.
In this operation, the auxiliary member 8 is also once removed from the cross member 6 or the main frame 2 in advance, and is connected to the cross member 6 or the main frame 2 again with the seat width changed.
[0008]
As described above, in the frame body 1 having such a structure, in order to change the seat width, each cross member 6 is temporarily detached from the connecting portion 4, moved downward, and then fastened to the connecting portion 4 again. Then, the auxiliary member 8 is once removed from the cross member 6 or the like, and the work of reconnecting to the cross member 6 or the like with the seat width changed is required. For this reason, there is a problem in that the operation of changing the seat width is not easy and a certain skill is required.
Accordingly, an object of the present invention is to provide a wheelchair in which seat width adjustment is easily and quickly performed without changing the seating surface height.
[0009]
In addition, such a structure (a structure in which each cross member is configured in an X shape and both are moved in the height direction while being rotated) is publicly known. There is nothing to know.
[0010]
[Means for Solving the Problems]
(1) In order to achieve the above object, the wheelchair according to the present application is disposed opposite to each other along the left-right direction and extends in the front-rear direction to each upper bone member below the pair of upper bone members and each upper bone member. A main frame having a pair of lower bone members arranged in parallel, a seat frame having a pair of seat surface partition members arranged along each upper bone member and mounted with a seat member constituting the seat surface, and one end Is connected to a predetermined portion of one seat surface partition member, and the other end is connected to a predetermined portion of the other lower surface member and one end is connected to a predetermined portion of the other seat surface partition member. And another cross member whose other end is connected to a predetermined portion of one lower bone member, and a cross member pair formed in an X shape by pivotally coupling the center portions of each other. , The vertical displacement with respect to the main frame A support mechanism that supports the seat frame in an allowed state, and a position adjustment mechanism that adjusts the height position of the cross member pair with respect to the main frame by allowing the cross member pair to slide along the vertical direction. It is characterized by this.
[0011]
According to this configuration, the X-shaped cross member pair is relatively rotated, whereby the distance between one end of each of the one cross member and the other cross member constituting the cross member pair. And the distance between the other ends changes. Therefore, when the cross member pair is rotated, the distance between the seat surface partition members is changed, and thereby the seat width is changed.
If the position of the center of rotation of both cross members is unchanged when the cross member pair is rotated, the vertical position (that is, the height position) of one end of each cross member changes. Is changed, the height of the seating surface changes at the same time.
[0012]
However, the height position of the cross member pair with respect to the main frame is adjusted by the position adjusting mechanism. For example, when the position of one end of each cross member becomes higher, the cross member pair is moved downward correspondingly, and when the position of one end of each cross member becomes lower, Correspondingly, the cross member pair is moved upward. Thereby, the seat width is changed without changing the height position of the seat surface.
Furthermore, since the seat frame is supported with respect to the main frame by the support mechanism, the geometric positional relationship between the seat frame and the main frame is always maintained. In addition, since the seat frame can be displaced in the vertical direction with respect to the main frame, even when the cross member pair is displaced in the vertical direction, the seat surface partition member is displaced following this.
In other words, since the geometric positional relationship of the seat frame with respect to the main frame is always maintained, the height of the cross member pair is adjusted by the position adjusting mechanism while the cross member pair is rotated, so that the seat surface section is adjusted. While the distance between the axes of the members is changed, the height position is kept constant.
[0013]
(2) When the seat frame is displaced in the vertical direction, the axial direction of the seat surface partition member Around It is preferable that a rotation allowance mechanism for allowing the rotation is further provided.
In this configuration, the seat surface partition member is moved in the axial direction by the rotation allowing mechanism. Around Can be rotated.
If this rotation permission mechanism is not provided, when the cross member pair is rotated, the seat surface partition member is connected to one end of each cross member. Corresponding to the angle, each seat surface partition member has its axial direction as the center of rotation Around Rotate to. Since the seat member is attached to the seat surface partition member, the seat member may be pulled or bent as the cross member rotates.
However, by providing the rotation permission mechanism, the rotation associated with the rotation of the cross member pair of the seat surface partition member is offset. That is, the seat surface partition member rotated with the rotation of the cross member pair rotates in the direction opposite to the rotation direction, and as a result, does not rotate with respect to the main frame. This suppresses the sheet member from being pulled or bent.
[0014]
(3) The support mechanism includes a cylindrical member that connects the upper bone member and the lower bone member, and a rod member that has an upper end connected to the seat surface partition member and is inserted into the cylindrical member from the lower end side. And is configured.
In this configuration, when the rod-shaped member is inserted into the tubular member, the rod-shaped member is positioned on the tubular member in a state in which the rod-shaped member can be displaced in the vertical direction, and as a result, the geometrical relationship between the main frame and the seat frame is obtained. The positional relationship is maintained. Thus, the cylindrical member and the rod-shaped member have an advantage that the geometric positional relationship between the main frame and the seat frame is maintained with a simple structure.
[0015]
(4) The seat surface partition member includes an outer cylinder member and an axial direction inside the outer cylinder member. Around And an inner shaft member inserted in a state where the rotation of the inner shaft member is allowed, and the inner shaft member may be connected orthogonally to the rod-shaped member.
In this configuration, the axial direction relative to the outer cylinder member Around Since the inner shaft member is inserted in a rotatable state and the inner shaft member and the rod-shaped member are connected to each other, as described above, when the cross member is rotated, By rotating the inner shaft member, the seat surface partition member rotates so as to cancel the rotation of the cross member. That is, there is an advantage that the rotation permission mechanism is simply configured.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.
[0017]
FIG. 1 is a perspective view showing a wheelchair 10 according to an embodiment of the present invention.
The wheelchair 10 includes a main frame 11, a seat frame 12, and a back frame 13. The seat frame 12 is attached to the main frame 11 as will be described later. The back frame 13 is attached to the rear of the seat frame 12.
The wheelchair 10 includes a front wheel 14 and a rear wheel 15 attached to the main frame 11, a leg support 16 attached to the front of the seat frame 12, and a pair of left and right armrests attached to the side of the seat frame 12. 17 and a pusher 18 and a release lever 19 attached above the back frame 13.
The front wheel 14, the rear wheel 15, the leg support 16, the armrest 17, the pusher 18 and the release lever 19 have known configurations, and thus detailed description thereof is omitted.
[0018]
The back frame 13 is provided with a seat member 20, thereby forming a back surface 21. The seat frame 12 is also provided with a seat member 22, thereby forming a seat surface 23.
The sheet member 20 and the sheet member 22 have a known configuration, and are formed by, for example, a belt-shaped surface fastener. The seat member 20 and the seat member 22 are mounted so as to be wound around the back frame 13 and the seat frame 12, respectively.
[0019]
2 is an enlarged side view of main parts of the main frame 11 and the seat frame 12, FIG. 3 is a sectional view taken along line III-III in FIG. 2, and FIG. 4 is an enlarged view of the main parts of the main frame 11 and the seat frame 12. It is a perspective view. Each of these drawings shows a mounting structure of the seat frame 12 with respect to the main frame 11.
The feature of this embodiment is the mounting structure of the seat frame 12 with respect to the main frame 11, and the width dimension of the seat frame 12, that is, the seat width (specifically, a pair of seat surface partition members 30, described later, 31) is that the height of the seating surface 23 is kept constant by a very simple operation.
[0020]
Hereinafter, the structures of the main frame 11 and the seat frame 12 will be described in detail with reference mainly to FIG.
The main frame 11 and the seat frame 12 are made of a metal such as an aluminum alloy, for example.
The main frame 11 includes a pair of upper bone members 24 and 25 and a pair of lower bone members 26 and 27. The upper bone member 24 and the upper bone member 25 are disposed to face each other in the left-right direction and extend in the front-rear direction. The lower bone members 26 and 27 are arranged vertically below the upper bone members 24 and 25, respectively, and are arranged in parallel with the upper bone members 24 and 25.
[0021]
In the present embodiment, the pair of lower bone members 26, 27 are curved upward at the front portion from the center. Further, as shown in FIG. 2, a vertical beam member 28 and a vertical beam member 29 are provided between the upper bone member 24 and the lower bone member 26 and between the upper bone member 25 and the lower bone member 27. Yes. By these vertical beam members 28 and 29, the upper bone member 24 and the lower bone member 26 are connected, and the upper bone member 25 and the lower bone member 27 are connected.
[0022]
The seat frame 12 includes a pair of seat surface partition members 30 and 31. The seat surface partition members 30 and 31 extend in the front-rear direction so as to follow the upper bone members 24 and 25, respectively. In the present embodiment, the seat surface partition members 30 and 31 are disposed on the upper bone members 24 and 25 via the receiving tool 46. The receiver 46 is made of rubber, resin, or the like, and prevents the seat surface partition members 30 and 31 from coming into direct contact with the upper bone members 24 and 25.
[0023]
In this embodiment, the seat surface partition members 30 and 31 are each formed in a so-called double pipe shape. That is, the seat surface partition members 30 and 31 include outer cylinder members 30a and 31a and inner shaft members 30b and 31b, respectively. The outer cylinder members 30a and 31a and the inner shaft members 30b and 31b are made of a metal such as an aluminum alloy, for example.
[0024]
The outer cylinder members 30a and 31a are divided into two along the axial direction as shown in FIGS. The inner shaft members 30b and 31b are inserted inside the outer cylinder members 30a and 31a. The outer diameters of the inner shaft members 30b and 31b correspond to the inner diameters of the outer cylinder members 30a and 31a, and the inner shaft members 30b and 31b are inserted exactly without any backlash. However, the inner shaft members 30b and 31b are in the axial direction with respect to the outer cylinder members 30a and 31a. Around It can be rotated freely.
[0025]
In other words, the outer cylinder members 30a and 31a constituting the seat surface partition members 30 and 31 are in the axial direction. Around The outer cylinder members 30a and 31a and the inner shaft members 30b and 31b are arranged so that the seat surface partition members 30 and 31 are in the axial direction. Around A rotation permission mechanism 43 for allowing the rotation to rotate is configured. The effect of the rotation permission mechanism 43 will be described later.
[0026]
A pair of cross members 32, 33 are provided on the seat surface partition members 30, 31 constituting the seat frame 12. In the present embodiment, only a pair of cross members 32 and 33 are provided, but it is needless to say that a plurality of pairs of cross members may be provided.
In the present embodiment, the cross members 32 and 33 are constituted by metal square pipes such as an aluminum alloy. Each of the cross members 32 and 33 is a member having the same structure, and both of them are arranged in an X shape. In the present embodiment, the cross members 32 and 33 are connected by a rotation center shaft 34 and are relatively rotatable about the rotation center shaft 34 as a rotation center. The rotation center shaft 34 is prevented from coming off by a retaining ring 34a or the like.
[0027]
One end 32a of the cross member 32 (one cross member) is connected and fixed to the seat surface partition member 30 (one seat surface partition member), and the other end 32b is the lower bone member 27 (the other lower bone member). ). In addition, one end 33a of the cross member 33 (the other cross member) is connected and fixed to the seat surface partition member 31 (the other seat surface partition member), and the other end 33b is connected to the lower bone member 26 (the lower part of the one). Bone member).
One end portions 32a and 33a of the cross member 32 and the cross member 33 are fixed to the seat surface partition members 30 and 31, for example, by welding. Specifically, the one end portions 32 a and 33 a of the cross members 32 and 33 are fixed to the outer cylinder members 30 a and 31 a constituting the seat surface partition members 30 and 31.
[0028]
In the present embodiment, the cross members 32 and 33 are supported by a position adjusting mechanism 35 described later, whereby the cross members 32 and 33 are supported by the main frame 11 in a state in which the cross members 32 and 33 can be displaced in the vertical direction. .
The position adjustment mechanism 35 is provided on the lower bone members 26 and 27 constituting the main frame 11. The position adjustment mechanism 35 includes a pair of support frames 36 and 37, a support pipe 38 disposed so as to be bridged between the support frames 36 and 37, and a connection pin 39 that connects the support pipe 38 to the support frames 36 and 37. .
[0029]
The support frames 36 and 37 are substantially rectangular plate-like members and are made of a metal such as an aluminum alloy. The support frames 36 and 37 are configured in the same shape, and are arranged to face each other with a predetermined span s. The support frames 36 and 37 are attached so as to protrude inside the lower bone members 26 and 27 as shown in FIG. The support frames 36 and 37 are attached to the lower bone members 26 and 27 by welding or the like, for example.
[0030]
The support frames 36 and 37 are provided with a plurality of through holes 40 in the vertical direction at a predetermined interval p (two in this embodiment). The support pipe 38 is disposed between the support frames 36 and 37 so that the center thereof coincides with the center of the through hole 40, and the connecting pin 39 is inserted from the outside of the support frame 36. As shown in FIG. 2, the connecting pin 39 is prevented from coming off by a retaining ring 41 (retainer) or the like.
[0031]
In FIG. 4, the support pipe 38 is fixed and supported by the connecting pin 39 at the position of the upper through hole 40. However, after the connecting pin 39 is once removed, the support pipe 38 is moved to the position of the lower through hole 40. The support pipe 38 is fixedly supported at the position of the lower through-hole 40 by being arranged and the connection pin 39 being inserted through the lower through-hole 40 again.
As described above, the lower end portions 32 a and 32 b of the cross members 32 and 33 can be slid in the vertical direction by the position adjusting mechanism 35. Therefore, the cross members 32 and 33 are slid up and down together. That is, the seat frame 12 connected to the cross members 32 and 33 can be displaced in the vertical direction.
[0032]
On the other hand, as shown in FIG. 4, the seat frame 12 is supported with respect to the main frame 11 by a support mechanism 42 described later.
The support mechanism 42 includes a connecting pipe 44 (cylindrical member) and a connecting rod 45 (bar-shaped member). The connection pipe 44 and the connection rod 45 are made of a metal such as an aluminum alloy, for example.
[0033]
The connection pipe 44 connects the upper bone member 24 and the lower bone member 26 constituting the main frame 11 in the vertical direction, and connects the upper bone member 25 and the lower bone member 27 in the vertical direction.
In the present embodiment, the central axes of the connecting pipes 44 are arranged so as to intersect the central axes of the upper bone members 24 and 25 and the central axes of the lower bone members 26 and 27. The connection pipe 44 is connected to the upper bone members 24 and 25 and the lower bone members 26 and 27 by, for example, welding.
Needless to say, the connecting pipe 44 may be disposed outside or inside the upper bone members 24 and 25.
[0034]
The connecting rod 45 passes through the upper bone members 24 and 25 and is inserted inside the connecting pipe 44. The outer diameter of the connecting rod 45 corresponds to the inner diameter of the connecting pipe 44, and the connecting rod 45 is inserted into the connecting pipe 44 without any backlash. However, the connecting rod 45 is slidable along the axial direction (vertical direction) with respect to the connecting pipe 44.
In the present embodiment, the upper end portion of the connecting rod 45 is connected to the inner shaft members 30b and 31b constituting the seat surface partition members 30 and 31. Both are connected by welding, for example.
[0035]
In the wheelchair 10 according to the present embodiment, the width dimension of the seating surface 23 is changed as follows. Hereinafter, the procedure for changing the seat width will be described mainly with reference to FIGS. 3 and 4.
First, the two connecting pins 39 are pulled out from the support frame 36 from the state shown in these drawings. The connecting pin 39 is easily removed by removing the retaining ring 41 (see FIG. 2). Thereby, the other end portions 32b and 33b of the cross members 32 and 33 are released from the restriction by the connecting pin 39 and become free ends.
[0036]
The cross members 32 and 33 formed in an X shape are rotated about the rotation center shaft 34. The direction of rotation is a direction in which the one end portions 32a and 33a of the cross members 32 and 33 are close to each other. As the cross members 32 and 33 are rotated in this direction, the one end portions 32a and 33a come close to each other, thereby reducing the distance between the seat surface partition members 30 and 31. That is, the seat width is narrowed.
[0037]
By the way, when the cross members 32 and 33 are rotated as described above, since both are connected by the rotation center shaft 34, the positions of the one end portions 32a and 33a of the cross members 32 and 33 are as follows. It will move upward. Therefore, as the seat width is reduced, the height position of the seat surface 23 is simultaneously moved upward.
[0038]
However, the height position of the cross members 32 and 33 with respect to the main frame is adjusted by the position adjusting mechanism 35. Accordingly, when the positions of the one end portions 32a and 33a of the cross members 32 and 33 become higher, the cross members 32 and 33 are moved downward by the position adjusting mechanism 35 correspondingly. That is, the seat surface partition members 30 and 31 move downward.
Further, since the seat frame 12 can be displaced in the vertical direction with respect to the main frame 11 by the support mechanism 42, when the cross members 32, 33 are moved downward, the seat frame 12 follows this. The surface partition members 30 and 31 move downward. Moreover, since the seat frame 12 is supported with respect to the main frame 11 by the support mechanism 42, the geometric positional relationship between the seat frame 12 and the main frame 11 is always maintained.
[0039]
That is, the connecting pin 39 is removed, and the cross member 32, 33 is rotated and moved downward by the position adjusting mechanism 35. Their height positions will be kept constant.
Thus, in the wheelchair 10 according to the present embodiment, the width dimension is easily changed by a very simple operation while the height position of the seat frame 12 is kept constant. Therefore, the seat width adjustment of the wheelchair 10 is easily and quickly performed.
[0040]
On the contrary, when the seat width is increased, the seat surface 23 is lowered. However, as described above, the position adjusting mechanism 35 causes the positions of the one end portions 32a and 33a of the cross members 32 and 33 to move upward. Moved. Thereby, even when the seat width is increased, this operation is performed easily and quickly.
[0041]
In particular, in the present embodiment, since the rotation permission mechanism 43 is provided, when the seat frame 12 is displaced in the vertical direction, the seat surface partition members 30 and 31 are arranged in the axial direction. Around Can be rotated.
If the rotation permission mechanism 43 is not provided, when the cross members 32 and 33 are rotated, the end portions 32a and 33a of the cross members 32 and 33 are attached to the seat surface partition members 30 and 31, respectively. Since they are connected, the seat surface partition members 30, 31 correspond to the rotation angles of the cross members 32, 33, and the axial direction Around Will rotate.
[0042]
This is not particularly a problem when the wheelchair 10 is used, but the seat member 22 (see FIG. 1) is mounted on the seat surface partition members 30 and 31, so that the cross members 32 and 33 are rotated. The sheet member 22 tends to be pulled or bent along with the movement.
However, by providing the rotation permission mechanism 43, the rotation of the seat surface partition members 32 and 33 accompanying the rotation of the cross members 32 and 33 is offset. Thereby, there exists an advantage that it is suppressed that the said sheet | seat member 22 is pulled or bent.
[0043]
In the present embodiment, the support mechanism 42 is provided in order to maintain the geometrical positional relationship of the seat frame 12 with respect to the main frame 11. The support mechanism 42 includes a connection pipe 44 and a connection rod 45. Therefore, the structure of the support mechanism 42 is very simple. Thereby, there exists an advantage that it is suppressed that the manufacturing cost of the wheelchair 10 raises significantly.
[0044]
Furthermore, in this embodiment, the seat surface partition members 30 and 31 constituting the seat frame 12 are constituted by outer cylinder members 30a and 31a and inner shaft members 30b and 31b, and the shafts are formed inside the outer cylinder members 30a and 31a. direction Around The inner shaft members 30b and 31b are inserted in a state where the rotation of the inner shaft member 30b is allowed.
Therefore, when the cross members 32 and 33 are rotated, the inner shaft members 30b and 31b are rotated with respect to the outer cylinder members 30a and 31a, thereby canceling the rotation of the cross members 32 and 33. The seat surface partition members 30 and 31 are rotated. That is, the rotation permission mechanism 43 has a very simple structure, and as a result, an increase in the manufacturing cost of the wheelchair 10 is further suppressed.
[0045]
Next, a modification of this embodiment will be described.
FIG. 5 is an enlarged perspective view of a main part of a wheelchair 10 according to a modification of the present embodiment, and illustrates a connection structure of the main frame 11 and the seat frame 12.
In the wheelchair 10 according to this modification, the structure of the rotation permission mechanism 43 is different. In order to simplify the description, only the seat surface partition member 30 is shown in the figure, but the seat surface partition member 31 facing the seat surface partition member 30 has the same configuration.
[0046]
That is, in the said embodiment, the seat surface division members 30 and 31 are each formed in what is called a double pipe shape (refer FIG. 4), respectively, and outer cylinder members 30a and 31a and inner shaft members 30b and 31b, respectively. And. And the connecting rod 45 which comprises the support mechanism 42 is connected with the inner shaft members 30b and 31b, and the cross members 32 and 33 are connected with the outer cylinder members 30a and 31a.
On the other hand, in this modified example, the seat surface partition member 30 includes an outer cylinder member 30a and an inner shaft member 30b, but the connecting rod is connected to the outer cylinder member 30a, and the cross member 32 is an outer cylinder member. A rotation permission mechanism 43 is configured by passing through 30a and being connected to the inner shaft member 30b.
Since the cross member 32 penetrates the outer cylinder member 30a and is connected to the inner shaft member 30b, the outer cylinder member 30a is provided with a through hole 30c.
[0047]
In such a configuration, when the cross members 32, 33 are rotated when the seat width is adjusted, the outer cylinder members 30a, 31a constituting the seat surface partition members 30, 31 do not rotate, and the outer cylinder member 30a. , 31a, the inner shaft members 3b, 31b rotate.
Therefore, for example, even when the sheet member 22 is wound around and attached to the outer cylinder members 30a and 31a, the sheet member 22 is not pulled or bent by the rotation of the cross members 32 and 33.
[0048]
【The invention's effect】
As described above, according to the present invention, since the geometric position of the seat frame with respect to the main frame is maintained, the width dimension of the seat frame can be adjusted only by adjusting the height of the cross member pair while being rotated. Is changed. Therefore, the seat width adjustment of the wheelchair is performed easily and quickly.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a wheelchair according to an embodiment of the present invention.
FIG. 2 is an enlarged side view of main parts of a main frame and a seat frame of a wheelchair according to an embodiment of the present invention.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is an enlarged perspective view of main parts of a main frame and a seat frame of a wheelchair according to an embodiment of the present invention.
FIG. 5 is an enlarged perspective view of a main part of a wheelchair according to a modification of the present embodiment.
FIG. 6 is a front view of a frame body applied to a conventional wheelchair.
[Explanation of symbols]
10 ... Wheelchair
11 ... Mainframe
12 ... seat frame
22 ... Sheet member
23 ... Bearing surface
24 ... Upper bone member
25 ... Upper bone member
26 ... Lower bone member
27 ... Lower bone member
30 ... Seat surface partition member
30a ... outer cylinder member
30b ... Inner shaft member
31 ... Seat surface partition member
31a ... outer cylinder member
31b ... Inner shaft member
32 ... Cross member
32a ... one end
32b ... other end
33 ... Cross member
33a ... one end
33b ... the other end
34 ... Rotation center axis
35 ... Position adjustment mechanism
36 ... Support frame
37 ... Support frame
38 ... Support pipe
39 ... Connecting pin
40 ... through hole
42 ... Support mechanism
43 ... Rotation allowance mechanism
44 ... Connection pipe
45 ... Connecting rod

Claims (4)

A main frame having a pair of upper bone members disposed in parallel in the left-right direction and extending in the front-rear direction and a pair of lower bone members disposed in parallel to the upper bone members below the upper bone members;
A seat frame having a pair of seat surface partition members disposed along each upper bone member and mounted with a seat member constituting the seat surface;
One cross member having one end connected to one seat surface partition member and the other cross member having one end connected to the other seat surface partition member are coupled to each other in a freely rotatable manner. A cross member pair formed in an X shape by
A support mechanism for supporting the seat frame in a state in which a vertical displacement with respect to the main frame is allowed;
A position adjustment mechanism,
The other end of one cross member is connected to the other lower bone member via the position adjusting mechanism, and the other end of the other cross member is connected to one lower bone member via the position adjusting mechanism,
The cross member pair is allowed to slide in the vertical direction with respect to the main frame.
The position adjustment mechanism adjusts the height position of the cross member pair relative to the main frame,
A wheelchair in which the seat width can be changed while the height position of the seat frame is kept constant . The wheelchair according to claim 1, further comprising a rotation permission mechanism that allows rotation of the seat surface partition member around an axial direction when the seat frame is displaced in the vertical direction. The support mechanism is
A cylindrical member connecting the upper bone member and the lower bone member;
The wheelchair according to claim 1 or 2, further comprising: a rod-like member having an upper end connected to the seat surface partition member and inserted into the cylindrical member from the lower end side. The seat surface partition member is
An outer cylinder member, and an inner shaft member inserted in a state in which rotation around the axial direction is allowed inside the outer cylinder member,
The wheelchair according to claim 3, wherein the inner shaft member is connected orthogonally to the rod-shaped member.

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