JP2007007116A - Wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheelchair which can easily perform the assembly operation of a lever and a wheel to a frame. <P>SOLUTION: The frame 12, which at least supports a seat section, is included. Main wheels 22, which are rotatable in relation to the frame 12, are arranged one at a time on both sides between which the seat section and the frame 12 are put. The lever 24, which is prepared according to each of the main wheels 22 and can rotate the main wheels 22 by moving it towards an X or Y direction, is included. A shaft member 26, in which one end portion is supported by the lever 24 and penetrates the central part of the main wheel 22 corresponding to the lever 24, is included. A fixing member 48, which substantially fixes the other end portion of the shaft member 26 to the frame 12 in the longitudinal direction of this shaft member 26, is included. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wheelchair including a lever for rotating a wheel, and more particularly to a wheelchair capable of easily assembling a lever and a wheel with respect to a frame.

  A conventional example of a wheelchair including a lever for rotating a wheel is described in Patent Document 1, for example.

  The wheelchair lever is connected to the wheel. When the seated person moves the lever back and forth, the wheelchair travels.

  Further, a conventional example of a wheelchair in which an axle is supported by a frame is described in Patent Document 2, for example.

  The wheel 11 of the wheelchair includes an axle 18. Bearings 16 and 17 are interposed between the wheel 11 and the axle 18 (see paragraph [0021]).

  The axle 18 includes an outer cylinder 19 and an inner rod 24 held in the outer cylinder 19. A through hole 19 b is formed in the outer cylinder 19. The through hole 19b penetrates the inner and outer peripheries. A spherical locking piece 21 is locked in the through hole 19b so as not to protrude from the outer cylinder 19 (see paragraph [0024] of Patent Document 1).

  The tip 24a of the inner rod 24 is inclined in a tapered shape. A coil spring 22 is disposed on the base portion 24 e side of the inner rod 24. The coil spring moves the inner rod 24 toward the base portion 24e. When the inner rod 24 moves to the distal end portion 24 a side, the locking piece 21 is housed inside the outer cylinder 19. When the inner rod 24 moves to the base side 24a, the inner rod 24 causes the locking piece 21 to protrude from the outer cylinder 19 (see paragraphs [0028] to [0030] of Patent Document 1).

  The assembly work of the wheel 11 with respect to the frame 1 is performed in a state where the inner rod 24 is pressed toward the distal end portion 24 a, that is, in a state where the locking piece 21 is housed inside the outer cylinder 19. Thereafter, when the pressure on the inner rod 24 is released, the locking piece 21 protrudes from the outer cylinder 19 (see paragraph [0037] of Patent Document 1). Thereby, the outer cylinder 19 is fixed to the frame 1 in the longitudinal direction of the axle.

  A conventional example having the same configuration as that of Patent Document 2 is disclosed in FIG.

Japanese Patent Laid-Open No. 2001-224634 (FIGS. 1 and 4) JP 2000-102568 (paragraphs [0024], [0028] to [0030], [0037], FIGS. 3 to 6) JP-A-1-37148 (FIG. 4)

  However, in the case of a wheelchair including a lever for rotating the wheel, there is a problem that it is difficult to assemble the wheel and the lever with respect to the frame. This is because a number of processes are required in which the wheel is supported on the frame and then the lever is supported on the frame and the wheel. Moreover, when the lever is assembled to the frame and the wheel, the frame must be supported by the wheel. Therefore, the assembly work of the wheel and lever with respect to the frame becomes a factor of cost increase.

  The present invention has been made in view of the above problems, and a main object of the present invention is to provide a wheelchair capable of easily assembling a lever and a wheel with respect to a frame.

  In the present invention, the following features are provided alone or in combination as appropriate. A wheelchair according to the present invention for solving the above-described problem is provided with a plurality of frames that support at least a seat portion and at least one frame on both sides of the seat portion and the frame, and that are rotatable with respect to the frame. A wheel, a lever provided corresponding to at least one of the plurality of wheels, the lever capable of rotating the wheel by moving in the X direction or the Y direction, and one end of the lever The shaft member that is supported by the lever and penetrates the center of the wheel corresponding to the lever, and the other end of the shaft member are substantially fixed to the frame at least in the longitudinal direction of the shaft member. A fixing member.

  According to the said structure, the shaft member has penetrated the center part of the wheel. One end of the shaft member is supported by the lever. The other end of the shaft member is substantially fixed to the frame at least in the longitudinal direction of the shaft member. Therefore, the wheel and the lever can be assembled to the frame integrally by passing the shaft member through the central portion of the wheel in advance.

  In the wheelchair according to the present invention, the wheelchair is provided between the lever and the wheel corresponding to the lever and fixed to the lever, and is rotatable with respect to the frame with the central portion of the wheel as a substantially rotation center. Further rotating members may be included. At this time, the shaft member is rotatably supported by the rotating member, and has a contacted portion with which the rotating member comes into contact when the lever is moved, and the rotating member is the lever A contact portion that contacts the contacted portion when the lens is moved in the X direction and the Y direction, and the fixed member has the contacted portion at a predetermined position in the rotation direction of the wheel. It is preferable that the shaft member is substantially fixed to the frame in the rotational direction of the wheel so as to be disposed.

  According to the above configuration, the movement of the lever is limited by the abutted portion regardless of whether the lever is moved in the X direction or the Y direction. Further, the fixing member substantially fixes the shaft member to the frame in the rotation direction of the wheel so that the contacted portion is disposed at a predetermined position in the rotation direction of the wheel. Therefore, the wheel, the rotating member, and the lever can be integrally assembled with the frame by passing the shaft member through the central portion of the wheel in advance.

  In the wheelchair according to the present invention, the shaft member may be formed with a first hole in a direction crossing a longitudinal direction of the shaft member. At this time, the fixing member is fixed to the frame, supports the shaft member, and has a second hole corresponding to the first hole, the first hole, and the first hole. It is preferable to include a penetrating member that substantially fixes the shaft member and the frame by penetrating through the two holes.

  According to the above configuration, when the penetrating member penetrates the first hole and the second hole, the shaft member and the fixing member, and thus the shaft member and the frame are substantially fixed.

  In the wheelchair according to the present invention, it is preferable that a guide portion for guiding the shaft member is formed on the fixing member.

  The wheelchair which concerns on this invention WHEREIN: The square part may be formed in the other edge part of the said shaft member. At this time, it is preferable that the said guidance | induction part is a square hole formed in the said fixing member corresponding to the said square-shaped part.

  In the wheelchair according to the present invention, a keyway may be formed on at least the other end of the shaft member. At this time, it is preferable that the said guidance | induction part is a key formed in the said fixing member corresponding to the said keyway.

  According to the first aspect of the present invention, since the wheel and the lever can be integrally assembled with the frame, the assembling work of the wheel and the lever with respect to the frame is simplified and facilitated. As a result, cost can be reduced.

  According to the second aspect of the present invention, the wheel, the rotating member, and the lever are integrally attached to the frame so that the movement range of the lever is an appropriate range, that is, a range that can be easily operated by a seated person. It has the further effect that it can be assembled.

  According to the third aspect of the invention, when the penetrating member penetrates the first hole and the second hole, the first hole and the first hole By forming the second hole, there is an additional effect that it is not necessary to consider the movement range of the lever when the wheel and lever are assembled to the frame.

  According to invention of Claim 4, a shaft member is guide | induced to the guidance | induction part formed in the fixing member. Therefore, the wheel, the rotating member, and the lever can be easily integrated with the frame so that the lever can be easily moved by the seated person.

  In addition, when the fixing member has a support member, the first hole is formed in the shaft member, and the second hole is formed in the support member, the following further effects are obtained. That is, by forming the guide portion so that the first hole and the second hole can be easily aligned, the penetrating member can be easily passed through the first hole and the second hole. it can. As a result, the shaft member can be easily fixed to the frame.

  According to invention of Claim 5, there exists an additional effect that the square part formed in the shaft member can prevent rotating in the rotation direction of a wheel by the square hole formed in the fixing member.

  According to the invention described in claim 6, when the shaft member is supported by the fixed member, there is a further effect that it is not necessary to consider the direction of the shaft member in the rotation direction of the wheel.

  Hereinafter, an example of a preferred embodiment of a wheelchair according to the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an example of an embodiment of a wheelchair according to the present invention.

  The wheelchair includes a seat 10 on which a seated person can sit, a frame 12 that forms a skeleton of the wheelchair, a caster 68 and a backrest 70 that are found in a conventional general wheelchair. The seat 10 is supported by the frame 12.

  The frame 12 includes a vertical frame 14 that supports the backrest portion 70, a horizontal frame 16 that intersects the vertical frame 14, and a vertical and horizontal support frame 18 that supports the vertical frame 14 and the horizontal frame 16.

  One main wheel 22 is arranged on each side of the seat portion 10 (two in total). The seat 10 and the frame 12 are sandwiched between the two main wheels 22. Each main wheel 22 is rotatable with respect to the frame 12.

  Each main wheel 22 is provided with a lever 24 corresponding thereto. When the seated person moves the lever 24 in the X direction or the Y direction, the main wheel 22 corresponding to the lever 24 rotates in the X direction or the Y direction.

  In this specification, the X direction is the rotation direction of each main wheel 22 for the wheelchair to move forward. The Y direction is the rotation direction of each main wheel 22 for the wheelchair to move backward.

  A rotating member 38 is provided between each lever 24 and the main wheel 22. The rotating member 38 is fixed to each lever 24. Therefore, when the lever 24 is moved in the X direction or the Y direction, the rotating member 38 rotates in the X direction or the Y direction as the lever 24 moves. The rotating member 38 rotates about the center O of the main wheel 22 as a substantial rotation center.

  In this embodiment, the main wheel 22 rotates in the X direction when the lever 24 is moved in the X direction, and the main wheel 22 rotates in the Y direction when the lever 24 is moved in the Y direction. It is not limited to this.

  For example, the main wheel 22 may be rotated in the Y direction when the lever 24 is moved in the X direction, and the main wheel 22 may be rotated in the X direction when the lever 24 is moved in the Y direction. . Further, when the lever 24 is moved in either the X direction or the Y direction, the main wheel 22 rotates in the X direction, and the lever 24 is moved in a direction different from the one direction. The main wheel 22 may be idled at the time.

  In this specification, “rotate in the X direction (or Y direction)” and “idle” are respectively “rotate in the X direction (or Y direction) with respect to the frame 12” and “idle with respect to the frame”. Means.

  FIG. 2 is a view of the rotating member 38 as viewed from the inside, that is, from the main wheel 22 (see FIG. 1) side.

  The rotating member 38 has a cup body 40 and a contact member 42. The cup body 40 has a concave portion 41 and has a tray shape or a bowl shape.

  The contact member 42 is attached to the concave portion 41 side of the cup body 40. The contact member 42 crosses the center O of the cup body 40. The center O of the cup body 40 and the center O of the main wheel 22 (see FIG. 1) are substantially concentric. The contact member 42 has a first contact portion 44 and a second contact portion 46.

  A shaft member 26 is disposed between the main wheel 22 (see FIG. 1) and the rotating member 38. The shaft member 26 has a shaft portion 28 and a base member 32. The base member 32 has a base substrate 34. The shaft portion 28 and the base substrate 34 are substantially orthogonal to each other. A contact portion 36 is formed on the base substrate 34. The abutted portion 36 protrudes toward the longitudinal direction side of the shaft portion 28.

  A hole (not shown) is formed at the center of the contact member 42. The shaft portion 28 passes through the hole so as to be rotatable with respect to the contact member 42. The base member 32 is disposed between the cup body 40 and the contact member 42. In this way, one end of the shaft member 26 is supported by the lever 24 (see FIG. 1) via the contact member 42 and thus the rotating member 38. In other words, the lever 24 (see FIG. 1) is supported by the rotating member 38, and the rotating member 38 is rotatably supported at one end of the shaft member 26. The center O of the contact member 42 and the center O of the main wheel 22 are substantially concentric.

  Here, a first hole 30 is formed at the other end of the shaft member 26, that is, at the tip of the shaft portion 28. The first hole 30 penetrates in a direction substantially perpendicular to the longitudinal direction of the shaft member 26 and thus the shaft portion 28.

  FIG. 3 is an exploded view of the frame 12, the main wheel 22, and the lever 24.

  Between the main wheel 22 and the lever 24, there is provided a force transmission mechanism 64 and a gear unit 66 for applying a rotational force to the main wheel 22 when the lever 24 is moved in the X direction or the Y direction. ing.

  The force transmission mechanism 64 is, for example, a two-way clutch or ratchet type. However, the force transmission mechanism 64 is not limited to these. It is only necessary that the force transmission mechanism 64 can apply a rotational force to the main wheel 22 when the lever 24 is moved in the X direction or the Y direction.

  A through hole 23 is formed at the center of the main wheel 22. The through hole 23 is formed so that the shaft portion 28 of the shaft member 26 can pass therethrough.

  An auxiliary frame 20 is provided between the horizontal frame 16 and the vertical and horizontal support frames 18. The auxiliary frame 20 is substantially parallel to the vertical frame 14.

  A fixing member 48 is provided between the horizontal frame 16 and the vertical and horizontal support frames 18. The fixing member 48 is fixed to the vertical frame 14 and the auxiliary frame 20.

  FIG. 4 is a view showing the periphery of the fixing member 48 as viewed from the opposite side of the lever 24 (see FIG. 3).

  3 and 4, the fixing member 48 includes a fixing plate 50 that straddles between the vertical frame 14 and the auxiliary frame 20, a support member 52 that supports the shaft portion 28 (see FIG. 3) of the shaft member 26, and a through-hole. And a member 60 (see FIG. 4).

  The fixing plate 50 is fixed to the vertical frame 14 and the auxiliary frame 20 by bolts 62 (see FIG. 3).

  The support member 52 has a bolt 53 and a cylindrical member 54 (see FIG. 4). The bolt 53 and the cylindrical member 54 (see FIG. 4) are fixed to the frame 12 via the fixing plate 50. The shaft member 26 is supported by these shafts 53 and 54 (see FIG. 4) by inserting a shaft portion 28 (see FIG. 3) into a bolt 53 and a cylindrical member 54 (see FIG. 4).

  However, instead of the shaft portion 28 (see FIG. 3) being inserted into the bolt 53 and the cylindrical member 54 (see FIG. 4), the shaft portion 28 (see FIG. 3) is replaced with the bolt 53 and the cylindrical member 54 (see FIG. 4). ) May be penetrated.

  In FIG. 4, a second hole 55 is formed in the cylindrical member 54. The second hole 55 penetrates in a direction substantially perpendicular to the longitudinal direction of the shaft portion 28 (see FIG. 2 or 3).

  The second hole 55 corresponds to the first hole 30 (see FIG. 2) formed in the shaft portion 28 (see FIG. 2 or 3). Here, “corresponding” means that the first hole 30 (see FIG. 2) and the second hole 55 can be aligned so as to be concentric.

  When the first hole 30 (see FIG. 2) and the second hole 55 are concentric, the penetrating member 60 can penetrate these holes 30 (see FIG. 2) and 55. In this embodiment, a pin is used as the penetrating member 60.

  When the penetrating member 60 passes through the first hole 30 (see FIG. 2) and the second hole 55, the longitudinal direction of the shaft portion 28 (see FIG. 2 or 3) and the rotation of the main wheel 22 (see FIG. 3). The shaft member 26 (see FIG. 2 or 3) and the tubular member 54 are fixed in the direction. That is, the shaft member 26 (see FIG. 2 or 3) and the frame 12 are substantially fixed.

  Next, an assembling method of the main wheel 22, the shaft member 26, the rotating member 38, and the lever 24 with respect to the frame 12 will be described with reference to FIGS.

  However, the rotating member 38 and the shaft member 26 are assembled in advance as shown in FIG. The rotating member 38 is fixed to the lever 24 in advance as shown in FIG.

  FIG. 5 is a view showing a mode in which the shaft portion 28 of the shaft member 26 is inserted into the support member 52.

  In FIG. 3, when the unit of the lever 24, the rotation member 38 and the shaft member 26 is assembled with the frame 12, the shaft portion 28 of the shaft member 26 is formed in advance through the through hole 23 formed in the center portion of the main wheel 22. To penetrate.

  As shown in FIG. 5, the shaft portion 28 that penetrates the through hole 23 is inserted into the bolt 53 and the cylindrical member 54 (see FIG. 4). In this way, the shaft portion 28 is supported by the support member 52. Then, after the first hole 30 and the second hole 55 (see FIG. 4) are aligned, the penetrating member 60 passes through these holes 30 and 55 (see FIG. 4) and is prevented from coming off. The Thereby, the shaft member 26 and the frame 12 are fixed in the rotation direction of the main wheel 22 and the longitudinal direction of the shaft portion 28.

  Returning to FIG. 3, the shaft portion 28 of the shaft member 26 is passed through the through hole 23 in advance, and the main wheel 22, the lever 24, the shaft member 26 and the rotating member 38 are integrated into the frame. 12 can be assembled. Therefore, the assembly work of the main wheel 22, the lever 24, the shaft member 26, and the rotating member 38 with respect to the frame 12 is simplified and facilitated. As a result, the cost of the wheelchair can be reduced.

  Next, the operation of the shaft member 26 and the rotating member 38 when the lever 24 is moved in the X direction or the Y direction will be described with reference to FIG.

  When the seated person moves the lever 24 in the X direction, the rotating member 38 rotates in the X direction. At this time, the first contact portion 44 contacts the contacted portion 36.

  On the other hand, when the seated person moves the lever 24 in the Y direction, the rotating member 38 rotates in the Y direction. At this time, the second contact part 46 contacts the contacted part 36.

  That is, when the rotating member 38 moves the lever 24 in the X direction, the first abutting portion 44 abuts on the abutted portion 36 and when the lever 24 moves in the Y direction. And a second contact portion 46 that contacts the contact portion 36.

  In this embodiment, the convex portion 43 is formed between the first contact portion 44 and the second contact portion 46 of the contact member 42. The convex portion 43 is formed in the vicinity of the second contact portion 46. A concave retracting portion 45 is formed between the convex portion 43 and the second contact portion 46.

  Therefore, when the seated person moves the lever 24 in the Y direction, the convex portion 43 contacts the contacted portion 36 before the second contact portion 46 contacts the contacted portion 36. . Then, when the seated person further moves the lever 24 in the Y direction, the contacted portion 36 is retracted to the retracting portion 45. At this time, the lever 24 (see FIG. 1 or FIG. 3) is held with respect to the rotating member 38. That is, the movement of the lever 24 (see FIG. 1 or 3) in the X direction and the Y direction is fixed with respect to the rotating member 38.

  Here, the abutted portion 36 is fixed to the frame 12 (see FIG. 1) in the rotation direction of the main wheel 22 (see FIG. 1 or 3). This is because the shaft member 26 and the frame 12 are fixed in the rotation direction of the main wheel 22 as described above. Thereby, the movement range of the lever 24 in the X direction and the Y direction is limited by the contacted portion 36.

  In this specification, “the rotation direction of the main wheel 22” is the X direction and the Y direction. This is because the main wheel 22 and the lever 24 are substantially parallel. However, the main wheel 22 and the lever 24 do not necessarily have to be substantially parallel. At this time, the rotation direction of the main wheel 22, the X direction and the Y direction are not completely the same.

  In this embodiment, the position of the shaft member 26 (more specifically, the contacted portion 36) in the rotation direction of the main wheel 22 (see FIG. 1 or 3) is determined by the seat occupant by the lever 24 (see FIG. 1). It is arranged at a predetermined position where it can be easily moved. That is, the shaft member 26 is attached to the main wheel 22 (see FIG. 1 or 3) by the fixing member 48 (see FIG. 3 or 4) so that the seated person can easily move the lever 24 (see FIG. 1). It is fixed in the direction of rotation.

  As a result, the main wheel 22, the shaft member 26, the rotating member 38, and the lever 24 can be integrally assembled with the frame 12 so that the movement range of the lever 24 is easily operated by the seated person. .

  The “range in which the movement range of the lever 24 is easily operated by the seated person” is, for example, a range from the vicinity of the seat portion 10 to the vicinity of the backrest portion 70, but is not limited thereto.

  In this embodiment, if the holes 30 and 55 (see FIG. 4) are aligned so that the first hole 30 and the second hole 55 (see FIG. 4) are concentric, the penetrating member 60 can penetrate these holes 30, 55.

  Therefore, it is not necessary to consider the movement range of the lever 24 when assembling the lever 24 with respect to the frame 12 (see FIG. 1 or FIG. 3). When the first hole 30 and the second hole 55 (see FIG. 4) are concentric, the holes 30 and 55 (see FIG. 4) are arranged so that the range of movement of the lever 24 is easily manipulated by the seated person. This is because it is sufficient if the reference) is formed.

  3 and 4, the support member 52 in this embodiment is formed with a guide portion that guides the shaft portion 28. This is because the shaft portion 28 (see FIG. 3) is easily inserted into the support member 52.

  Thus, the movement range of the lever 24 can be easily operated by the seated person without rotating the shaft portion 28 (see FIG. 3) in the rotation direction of the main wheel 22 (see FIG. 1 or 3) with respect to the support member 52. The main wheel 22, the rotation member 38, and the lever 24 can be easily assembled to the frame 12 so as to be within the range.

  Therefore, the first hole 30 and the second hole 55 can be easily aligned without rotating the shaft portion 28 (see FIG. 3) with respect to the support member 52. As a result, the penetrating member 60 can easily penetrate the first hole 30 and the second hole 55.

  However, when the guide member is formed in the support member 52, the first hole 30 and the second hole 55 are not necessarily formed in the shaft portion 28 and the cylindrical member 54, respectively. This is because the guide portion serves to substantially fix the shaft portion 28 (see FIG. 3) to the support member 52 and thus the frame 12 in the rotation direction of the main wheel 22 (see FIG. 1 or 3). Therefore, at this time, the shaft member 26 (see FIG. 3) only needs to be substantially fixed to the frame 12 in the longitudinal direction of the shaft portion 28 (see FIG. 3). As described above, even if the first hole 30 and the second hole 55 (see FIG. 4) are not formed, the moving range of the lever 24 (see FIG. 3) is within a range that can be easily operated by the seated person. The main wheel 22 (see FIG. 3), the rotating member 38 (see FIG. 3) and the lever 24 (see FIG. 3) can be easily assembled to the frame 12 integrally.

  Next, a specific example of the guide portion formed on the support member will be described with reference to FIGS. 6 and 7.

  FIG. 6 is a diagram illustrating an example of an embodiment of a guide portion that guides the shaft portion 28. FIG. 7 is a diagram illustrating another example of the embodiment of the guide portion that guides the shaft portion 28. In addition, the same code | symbol is attached | subjected to the part which is the same as that of the example of embodiment shown in FIG. 5, or it corresponds, and the difference with the said prior art example is mainly demonstrated below.

  In the bolt 53a shown in FIG. 6, a square hole 56a (for example, a hexagonal hole) is formed. Further, a square portion 29a (for example, a hexagonal portion) is formed at the other end portion of the shaft member 26a, that is, at the tip portion of the shaft portion 28a. A first hole 30a is formed in the rectangular portion 29a. A square hole 56a formed in the bolt 53a corresponds to the square portion 29a.

  Here, “the square hole 56a corresponds to the square portion 29a” means that the square portion 29a can be inserted into the square hole 56a and the shaft portion 28a is attached to the bolt 53a. This means that it does not rotate.

  When the shaft portion 28a is inserted into the support member 52a, the square hole 56a guides the shaft portion 28a in the longitudinal direction of the shaft portion 28a.

  According to this configuration, the rotation of the shaft member 26a with respect to the support member 52a can be prevented by the square hole 56a.

  Further, after the shaft portion 28a is inserted into the support member 52a, the first hole 30a and the second hole 55 (see FIG. 4) are formed without rotating the shaft portion 28a with respect to the support member 52a. Easy to align.

  In addition, it is preferable that the rotation direction position of the shaft part 28a with respect to the support member 52a is clearly indicated so that the shaft part 28a is easily inserted into the support member 52a. This is so that the position of the abutted portion 36 (see FIG. 2 or 3) in the rotation direction of the main wheel 22 (see FIG. 1 or 3) is a position where the lever 24 is easily moved by the seated person. is there.

  Furthermore, it is preferable that the cylindrical member 54 (see FIG. 4) is also formed with a square hole.

  However, a square hole may be formed in only one of the bolt 53a and the cylindrical member 54 (see FIG. 4). At this time, the shaft part 28 can be inserted into the other side where the square hole is not formed.

  A keyway 56b is formed in the bolt 53b shown in FIG. A key 58 is fitted into the key groove 56b.

  In addition to the first hole 30b, a key groove 29b is formed at the other end of the shaft member 26b, that is, at the tip of the shaft portion 28b. The keyway 29b corresponds to the key 58.

  Here, “the key groove 29b corresponds to the key 58” means that the key 58 can smoothly guide the shaft portion 28b and the shaft portion 28b does not rotate with respect to the bolt 53b. means.

  When the shaft portion 28b is inserted into the support member 52b, the key 58 guides the shaft portion 28b in the longitudinal direction of the shaft portion 28b.

  According to this configuration, rotation of the shaft member 26b relative to the support member 52b can be prevented by the key 58.

  Further, the rotational position of the abutted portion 36 (see FIG. 2 or 3) with respect to the support member 52b is determined by the positional relationship among the abutted portion 36, the key groove 29b, and the key 58. Therefore, if the keyway 29b and the key 58 are formed on the abutted portion 36 so that the seated person can easily move the lever 24, the assembly work of the lever 24 with respect to the frame 12 can be performed very easily. Is called. When the shaft portion 28b is inserted into the support member 52b, the first hole 30b and the second hole 55 (see FIG. 4) can be formed without considering the rotational position of the shaft portion 28b with respect to the support member 52b. This is because it can be easily aligned.

  In addition, although this invention is described in said preferable embodiment, this invention is not restrict | limited only to it. Various embodiments are possible without departing from the spirit and scope of the invention.

  For example, in the above-described embodiment, the wheelchair has one (two in total) main wheels 22 disposed on both sides of the seat portion 10 and the frame 12, but is not limited thereto. For example, two main wheels 22 may be arranged as a pair on both sides of the seat 10 and the frame 12.

  Moreover, in the above-mentioned embodiment, although the lever 24 is provided corresponding to each main wheel 22, it is not restricted to this. For example, the lever 24 may be provided corresponding to one main wheel 22 among the plurality of main wheels 22.

  In the above-described embodiment, the first hole 30 and the second hole 55 are formed so as to penetrate in a direction substantially orthogonal to the longitudinal direction of the shaft portion 28, but are not limited thereto. For example, the first hole 30 and the second hole 55 may be formed so as to penetrate in a direction intersecting the longitudinal direction of the shaft portion 28, that is, in a direction crossing the longitudinal direction of the shaft portion 28. In other words, after the first hole 30 and the second hole 55 are aligned, it is sufficient that the penetrating member 60 can penetrate these holes 30 and 55.

  Moreover, in the above-mentioned embodiment, although the contact member 42 attached to the cup body 40 has the 1st contact part 44 and the 2nd contact part 46, it is not restricted to this. For example, the first contact portion and the second contact portion may be formed on the cup body 40 without providing the contact member 42. In addition, instead of the contact member 42 having the first contact portion and the second contact portion 46, the first contact portion and the second contact portion having the same configuration as the contact portion 36. May be formed on the base substrate 34. At this time, when the seat occupant moves the lever 24 in the X direction, the contact member 42 contacts the first contact portion, and when the seat occupant moves the lever 24 in the Y direction, the contact member. 42 contacts the second contact portion. That is, it is sufficient if the lever 24 is moved in both the X direction and the Y direction when the lever 24 is moved.

  In the above-described embodiment, the fixing member 48 substantially fixes the other end of the shaft member 26 to the frame 12 in the longitudinal direction of the shaft portion 28 and the rotation direction of the main wheel 22. Not limited to this. That is, if the other end of the shaft member 26 is fixed to the frame 12 at least in the longitudinal direction of the shaft portion 28, both the main wheel 22 and the lever 24 can be assembled to the frame 12. . However, in order to limit the movement range of the lever 24 in the X direction and the Y direction, the shaft member 26 needs to be fixed to the frame 12 in the rotation direction of the main wheel 22.

  Moreover, in the above-mentioned embodiment, although the supporting member 52 has the volt | bolt 53 and the cylinder member 54 (refer FIG. 4), it is not restricted to this. Only one of the support members 52 may be provided. Moreover, it is not restricted to the volt | bolt 53 and the cylinder member 54, What is necessary is just to be able to support the axial part 28. FIG.

  Moreover, in the above-mentioned embodiment, although the fixing member 48 has the support member 52 which supports the axial part 28, it is not restricted to this. For example, the fixed plate 50 may be configured to be able to support the shaft portion 28. At this time, the guiding portion is preferably formed on the fixed plate 50.

  In the above-described embodiment, the movement range of the lever 24 in the X direction and the Y direction is set to a desired range by changing the angle formed by the first contact portion 44 and the second contact portion 46. Can do.

  In the above-described embodiment, the “lever 24” may be a curved lever or a bent lever in addition to a bar-like lever extending in a straight line. Furthermore, in the above-described embodiment, it is called “lever”, but it can be called “arm” or “handle” instead.

  In the above-described embodiment, “fixed in the longitudinal direction of the shaft portion 28” means that the movement of the shaft portion 28 in the longitudinal direction is restricted, and “in the rotational direction of the main wheel 22 ˜ “Fixed” means that the movement of the main wheel 22 in the rotational direction is restricted.

  In the above-described embodiment, “rotation” can also be referred to as “rotation”. Furthermore, “movement” can also be referred to as “rocking” or “turning”.

  Further, the “center portion” in the above-described embodiment means a portion including the center O and its periphery.

  In addition, “substantially fixed” in the above-described embodiment includes not only a case where it is physically fixed, but also a case where so-called play is taken into consideration. In addition, “substantially orthogonal” includes not only the case of being physically completely orthogonal but also substantially orthogonal. The same applies to “substantially parallel” and “substantially concentric”.

It is a perspective view which shows an example of embodiment of the wheelchair which concerns on this invention. It is the figure which looked at the rotating member from the main wheel side. It is the figure by which the flame | frame, the main wheel, and the lever were mutually decomposed | disassembled. It is the figure which showed the periphery of the fixing member, Comprising: It is the figure seen from the other side of the lever. It is the figure which showed the aspect by which a axial part is inserted in a support member. It is a figure which shows an example of embodiment of the induction | guidance | derivation part which guide | induces a shaft part. It is a figure which shows the other example of embodiment of the induction | guidance | derivation part which guide | induces a shaft part.

Explanation of symbols

10 Seat 12 Frame 22 Main wheel (wheel)
24 Lever 26 Shaft member 29a Square portion 30 First hole 36 Contacted portion 38 Rotating member 44 First contact portion 46 Second contact portion 48 Fixed member 52 Support member 55 Second hole 56a Square hole 56b Key Groove 58 key 60 penetrating member

Claims (6)

A frame that supports at least the seat,
A plurality of wheels arranged at least one each on both sides of the seat portion and the frame, and rotatable with respect to the frame;
A lever provided corresponding to at least one of the plurality of wheels and capable of rotating the wheel by moving in the X or Y direction;
One end is supported by the lever, and a shaft member that penetrates the center of the wheel corresponding to the lever;
A wheelchair including: a fixing member that substantially fixes the other end of the shaft member to the frame at least in a longitudinal direction of the shaft member. A rotation member provided between the lever and the wheel corresponding to the lever and fixed to the lever, and further rotatable with respect to the frame about the center of the wheel as a rotation center;
The shaft member is rotatably supported by the rotating member, and has a contacted portion with which the rotating member contacts when the lever is moved,
The rotating member has a contact portion that contacts the contacted portion when the lever is moved in the X direction and the Y direction;
The fixing member substantially fixes the shaft member to the frame in the rotational direction of the wheel so that the contacted portion is disposed at a predetermined position in the rotational direction of the wheel. The wheelchair according to claim 1. The shaft member has a first hole formed in a direction crossing the longitudinal direction of the shaft member,
The fixing member is fixed to the frame, supports the shaft member, and has a second hole corresponding to the first hole, and the first hole and the second hole. The wheelchair according to claim 1, further comprising a penetrating member that substantially fixes the shaft member and the frame by penetrating the shaft.   The wheelchair according to claim 2 or 3, wherein a guide portion for guiding the shaft member is formed on the fixing member. A square portion is formed at least on the other end of the shaft member,
The wheelchair according to claim 4, wherein the guide portion is a square hole formed in the fixing member corresponding to the square portion. A key groove is formed at least on the other end of the shaft member,
The wheelchair according to claim 4, wherein the guide portion is a key formed on the fixing member corresponding to the keyway.

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