JP6475922B2 - wheelchair - Google Patents

Description

  The present invention relates to a wheelchair, and more particularly to a wheelchair in which an operation of a support member rotatably attached to a main body frame is facilitated.

  Wheelchairs are used by many people who have difficulty walking on their own, such as disabled people, elderly people, and injured people. Many wheelchairs have leg supports and armrests. The leg support is located in front of the wheelchair. The leg support supports the user's leg. The armrest is located on the left and right sides of the wheelchair. The armrest partitions the seat and the wheel. The armrest supports the user's arm. The leg support and armrest function as a support that supports the user's body. The leg support and armrest support the user's legs and arms and contribute to the stability of the user's posture.

  When the user gets on and off from the front of the wheelchair, the leg support interferes with getting on and off. Moreover, when moving to the bed from the side of the wheelchair, the armrest interferes with the movement.

  Japanese Patent No. 3553917 discloses a wheelchair in which an armrest is rotatable on a main body frame. For example, when the user moves from the wheelchair to the bed, the armrest rotates. Thereby, the user can move from the seat surface of the wheelchair to the bed without getting over the armrest. When the user is in a wheelchair, the armrest is fixed to the main body frame by operating the lever.

  Japanese Patent No. 4393686 discloses a wheelchair in which a leg support is rotatable on a main body frame. When the user gets on the wheelchair, the leg support rotates from the front of the wheelchair to the left and right outside. As a result, the leg support does not interfere with getting on and off. When the user is in a wheelchair, the leg support is fixed to the main body frame by a fixing pin.

  In these wheelchairs, when a user gets on and off, a support such as a leg support or an armrest is rotated. These wheelchairs are easy for users to get on and off. These supports are fixed to support the body of the user who is riding.

Japanese Patent No. 3553917 Japanese Patent No. 4393686

  In the wheelchair of Japanese Patent No. 3553917, a lever is operated to rotate and fix the armrest. The user operates the lever by hooking the lever on one or two fingers. However, the operation of this lever is not easy for a user with a hand or finger disorder. In the wheelchair of Japanese Patent No. 4393686, the fixing pin is operated to rotate and fix the leg support. The user operates by holding the hook of the fixing pin on the finger. However, it is not easy for a user with a hand or finger disability to operate the fixing pin. Users who cannot easily operate these levers and fixing pins take time to get on and off.

  An object of the present invention is to provide a wheelchair in which an operation of a support member rotatably attached to a main body frame is facilitated.

  The wheelchair according to the present invention includes a main body frame and a support that is rotatably attached to the main body frame. The support includes an operation lever that switches the support between a rotatable state and a fixed state, and a support frame that extends along the longitudinal direction of the operation lever. The operation lever is rotatable with respect to the support frame. One end portion of the operation lever is rotated to a release position where the operation lever approaches the support frame, so that the support tool can be rotated. One end of the operation lever is rotated to a fixed position away from the support frame, so that the support is fixed. The operation lever includes a gripping surface extending in the longitudinal direction of the support frame.

  Preferably, the grip surface extends along the longitudinal direction of the support frame.

  Preferably, a plurality of recesses are formed in the grip surface along the longitudinal direction of the operation lever.

  Preferably, a recess is formed on the outer surface of the support frame. This recess is formed to face the operation lever. When the operation lever is in the release position, at least a part of the gripping surface is located in the recess.

  The other wheelchair according to the present invention includes a main body frame and a support member rotatably attached to the main body frame. The support includes an operation lever that switches the support between a rotatable state and a fixed state, and a support frame that extends along the longitudinal direction of the operation lever. The operation lever is rotatable with respect to the support frame. One end portion of the operation lever is rotated to a release position where the operation lever approaches the support frame, so that the support tool can be rotated. One end of the operation lever is rotated to a fixed position away from the support frame, so that the support is fixed. A protrusion capable of coming into contact with a hand or finger operating the operation lever is provided on one end side of the operation lever.

  The wheelchair according to the present invention is easy to operate because it can be operated by holding the operating lever with the palm of the hand. Since the operation lever has a gripping surface, it can be operated intuitively.

FIG. 1 is a side view showing a wheelchair according to an embodiment of the present invention. FIG. 2 is an enlarged view showing an armrest of the wheelchair of FIG. FIG. 3 is an enlarged view showing the leg support of the wheelchair of FIG. FIG. 4A is an explanatory diagram showing the usage state of the armrest of FIG. 2, and FIG. 4B is an explanatory diagram showing another usage status of the armrest. FIG. 5A is an explanatory view showing a part of the leg support in FIG. 3 in use, and FIG. 5B is an explanatory view showing another part of the leg support in use. . FIG. 6 is an explanatory view showing a part of the leg support of FIG. FIG. 7 is an explanatory view showing another part of the leg support of FIG. FIG. 8 is an explanatory view showing a part of the front wheel of the wheelchair of FIG.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  FIG. 1 shows a wheelchair 2 according to the present invention. In FIG. 1, leftward in the left-right direction is forward in the front-rear direction of the wheelchair 2. The direction perpendicular to the paper surface of FIG. 1 is the left-right direction of the wheelchair 2. FIG. 1 shows a left side view of the wheelchair 2.

  The wheelchair 2 includes a main body frame 4, an armrest 6, a leg support 8, a pusher 10, a rear wheel 12, and a front wheel 14. This wheelchair 2 is made substantially symmetrical. The main body frame 4 is substantially symmetrical. The armrest 6, the leg support 8, the pusher 10, the rear wheel 12 and the front wheel 14 are attached to the main body frame 4 in a pair of left and right.

  The main body frame 4 includes a front pipe 16 extending vertically in front of the main body frame 4, an upper pipe 18 extending rearward from the upper end portion of the front pipe 16, and a back pipe 20 extending upward from the rear end portion of the upper pipe 18. Yes. The front pipe 16, the upper pipe 18 and the back pipe 20 are hollow pipes.

  The pair of left and right upper pipes 18 support a pair of left and right seat pipes. A seat is bridged between the pair of left and right seat pipes. A back seat is bridged between the pair of left and right back pipes 20. The seat seat supports the buttocks of the user riding on the wheelchair 2. The back sheet supports the back of the user.

  The presser 10 is located at the upper end of the back pipe 20 and extends rearward. The pusher 10 is a part that the assistant holds when pushing the wheelchair 2. The rear wheel 12 is attached to the rear side of the main body frame 14. The front wheel 14 is attached to the front side of the main body frame. The wheelchair 2 can move when the pair of rear wheels 12 and the pair of front wheels 14 contact the road surface and rotate.

  As shown in FIG. 2, the armrest 6 includes an armrest pipe 22, an armrest 24, a side frame 26, a guide panel 28, an operation lever 30, a fixing pin 32, and a spring 34. A rear end portion of the armrest pipe 22 is rotatably attached to the back pipe 20. The armrest 6 is rotatable about a point Pa in FIG. The armrest 6 is attached so as to be rotatable about the left-right direction as a rotation axis.

  The armrest 24 extends along the longitudinal direction of the armrest pipe 22. The armrest 24 covers an upper portion of the outer peripheral surface of the armrest pipe 22. The armrest 24 is a portion on which the user's elbow is placed. The side frame 26 extends from the armrest pipe 22 diagonally forward and downward. The front end of the side frame 26 extends toward the front end of the upper pipe 18. The guide panel 28 is fixed to the armrest pipe 22 and the side frame 26. The guide panel 28 faces in the left-right direction. The guide panel 28 partitions the rear wheel 12 and the seat.

  FIG. 2 shows a partially enlarged view of a range surrounded by a two-dot chain line. A fixing pin 32 is slidably inserted into the front end portion of the side frame 26. As shown in FIG. 2, the fixing pin 32 is slidable in the front-rear direction. The spring 34 biases the fixing pin 32 forward with respect to the side frame 26.

  A receiving tool 36 of the armrest 6 is fixed to the front end portion of the upper pipe 18. The receiving member 36 is formed with a recess 38 for receiving the front end portion of the side frame 26. The recess 38 is formed with a hole 40 in which the front end of the fixing pin 32 is locked. As shown in FIG. 2, the front end of the fixing pin 32 is locked in the hole 40.

  The operation lever 30 is attached to the side frame 26. The operation lever 30 extends along the longitudinal direction of the side frame 26 in a non-gripping state. The operation lever 30 is configured to be grasped with the hand together with the side frame 26. The side frame 26 functions as a support frame for the operation lever 30. The other end of the operation lever 30 is pivotally attached to the side frame 26. The other end attached to the shaft is located between one end and the other end of the operation lever 30 and is located on the other end side. The rear end of the fixing pin 32 is locked to the other end of the operation lever 30.

  A gripping surface 42 is formed between the other end portion and one end of the operation lever 30. The gripping surface 42 faces the direction in which the operation lever 30 rotates. The gripping surface 42 faces away from the side frame 26. The gripping surface 42 is directed to contact the hand gripping the operation lever 30 together with the side frame 26. The gripping surface 42 is formed with a width in which four fingers of the index finger, middle finger, ring finger, and little finger of a human hand are arranged.

  Four concave portions 44 are formed in the gripping surface 42. Each recess 44 is recessed in a direction approaching the side frame 26. Four concave portions 44 are formed side by side in the longitudinal direction of the operation lever 30. The four recesses 44 are formed with a size and interval that fits four fingers of a human hand.

  A projection 46 is formed at one end of the operation lever 30. The protrusion 46 is formed continuously with the gripping surface 42. The protrusion 46 is formed continuously from the recess 44 on the most end side. The protrusion 46 protrudes in a direction away from the gripping surface 42. The protrusion 46 extends in a direction orthogonal to the longitudinal direction of the operation lever 30.

  A cover 47 that extends from the gripping surface 42 and covers a part of the left and right side surfaces of the side frame 26 is formed on the operation lever 30. The cover 47 extends along the left and right side surfaces of the side frame 26. The cross section perpendicular to the longitudinal direction of the operation lever 30 is U-shaped with the gripping surface 42 and the pair of left and right covers 47.

  The side frame 26 is formed with a recess 26a. The recess 26a is recessed in a shape that becomes deeper from the other end where the operation lever 30 is pivotally attached toward one end. The operation lever 30 covers a part of the side frame 26 with a gripping surface 42 and a pair of left and right covers 47. The operation lever 30 covers the recess 26a. The operation lever 30 covers the recess 26a even at the fixed position, the release position, and the position between the fixed position and the release position.

  As shown in FIG. 3, the leg support 8 includes a leg pipe 48, a footrest 50, an insertion pin 52, a support arm 54, an operation lever 56, a fixing pin 58, and a spring 60.

  The leg pipe 48 extends substantially horizontally from the upper end to the front, curves from the middle, and extends in a straight line to the lower end obliquely below. The footrest 50 is plate-shaped and is attached to the lower end portion of the leg pipe 48 so as to be rotatable. The footrest 50 is a portion that supports the user's foot.

  The insertion pin 52 is attached to the upper end portion of the leg pipe 48. The insertion pin 52 protrudes downward. The support arm 54 is fixed to the leg pipe 48. The support arm 54 is fixed to a portion of the leg pipe 48 that extends obliquely downward. The support arm 54 extends rearward from the leg pipe 48. A contact surface 62 is formed at the rear end of the support arm 54. The contact surface 62 is a semicircular curved surface in the horizontal section. The contact surface 62 is formed in a shape along the outer peripheral surface of the front pipe 16.

  A fixing pin 58 is slidably inserted into the support arm 54. The fixing pin 58 is slidable in the front-rear direction. The spring 60 urges the fixing pin 58 backward with respect to the support arm 54.

  The operation lever 56 extends along a portion of the leg pipe 48 that extends obliquely downward in a non-gripping state. The operation lever 56 is adapted to be grasped by a hand together with the leg pipe 28. A portion of the leg pipe 48 extending obliquely downward functions as a support frame for the operation lever 56. The operation lever 56 is attached to the support arm 54. One end of the operation lever 56 is rotatable, and the other end of the operation lever 56 is pivotally attached to the support arm 54. A fixing pin 58 is locked to the other end of the operation lever 56. The other end portion is located on the other end side between the one end and the other end.

  A gripping surface 64 is formed between the other end portion and one end of the operation lever 56. The gripping surface 64 faces the direction in which the operation lever 56 rotates. The gripping surface 64 faces away from the leg pipe 48. The gripping surface 64 is directed to contact the hand that grips the operation lever 56 together with the leg pipe 48. The gripping surface 64 is formed with a width in which four fingers, that is, the index finger, the middle finger, the ring finger, and the little finger of a human hand are arranged.

  Four concave portions 66 are formed in the gripping surface 64. Each recess 66 is recessed in a direction approaching the leg pipe 48. Four concave portions 66 are formed side by side in the longitudinal direction of the operation lever 56. The four concave portions 66 are formed with a size and a distance that fits four fingers of a human hand.

  A protrusion 68 is formed at one end of the operation lever 56. The protrusion 68 is formed continuously on the gripping surface 64. The protrusion 68 is formed continuously with the recess 66 on the most end side. The protrusion 68 protrudes in a direction away from the gripping surface 64.

  A receiver 70 of the leg support 8 is fixed to the front pipe 16. The receiver 70 is formed in a shape for receiving the support arm 54 of the leg support 8. The receiving tool 70 is formed with a hole 72 in which the rear end of the fixing pin 58 is locked. As shown in FIG. 3, the rear end of the fixing pin 58 is locked in the hole 72.

  FIG. 4A shows the armrest 6 in the fixed state shown in FIG. Although not shown in FIG. 4A, the front end portion of the side frame 26 is received in the recess 38 of the receiver 36 (see FIG. 2). The fixing pin 32 is biased by the spring 34. The front end of the fixing pin 32 is locked in the hole 40 of the receiving member 36. As shown in FIG. 2, the armrest 6 is fixed so as not to rotate.

  FIG. 4A shows the operation lever 30 in the fixed position. The operation lever 30 is in a non-gripping state. As described above, the fixing pin 32 is positioned forward by being biased by the spring 34. The fixing pin 32 is locked in the hole 40, and the armrest 6 can be fixed. The other end of the operation lever 30 is engaged with the fixing pin 32 and is biased in a direction approaching the side frame 26. One end of the operation lever 30 is urged away from the side frame 26.

  FIG. 4B shows the armrest 6 in a rotatable state. In the rotatable state, the fixing pin 32 is not locked in the hole 40 of the receiving tool 36. Since the fixing pin 32 is not locked, the armrest 6 is rotatable about the rotation center Pa.

  FIG. 4B shows the operation lever 30 in the release position. The operation lever 30 is in a gripping state. The operation lever 30 is gripped, and one end of the operation lever 30 is rotated in a direction approaching the side frame 26. The other end of the operation lever 30 rotates in a direction away from the side frame 26. The fixing pin 32 is moved backward against the urging force of the spring 34. As the fixing pin 32 moves rearward, the fixing pin 32 is retracted to a position where it does not engage with the hole 40 of the receiving member 36.

  The usage method of this armrest 6 is demonstrated referring FIG.2, FIG.4 (a) and FIG.4 (b). As shown in FIG. 2, the armrest 6 in the fixed state is located on both the left and right sides of a seat seat (not shown). The user's arm is placed on the armrest 6. The armrest 6 protects the left and right sides of the user.

  For example, the side surface of the wheelchair 2 is brought close to the side surface of the bed. The user holds the operation lever 30. The operation lever 30 rotates and changes from the fixed position to the release position. The engagement between the fixing pin 32 and the hole 40 is released. Thereby, the armrest 6 changes from a fixed state to a rotatable state. The armrest 6 is rotated around the rotation center Pa. At this time, the armrest 6 is rotated by lifting the operation lever 30 upward. The armrest 6 is pivoted upward from the state of FIG. 4A as shown in FIG. 4B.

  In FIG.4 (b), when a user moves to the bed from the seat seat of the wheelchair 2, a user does not need to get over the armrest 6. FIG. This armrest 6 does not get in the way when the user moves to the bed. The user can easily move from the wheelchair 2 to the bed. Similarly, the user can easily move from the bed to the wheelchair 2.

  Since the operation lever 30 includes the gripping surface 42, the operation lever 30 can be gripped with four fingers of the index finger, the middle finger, the ring finger, and the little finger arranged side by side. Further, the operating lever can be operated by placing the palm of the hand against the gripping surface 42 instead of the finger. The operation lever 30 can be easily operated even if a hand or a finger is damaged. From this viewpoint, the width of the gripping surface 42 is, for example, 8 cm or more. On the other hand, the installation space can be reduced by reducing the operating lever. From this viewpoint, the width of the gripping surface 42 is, for example, 15 cm or less.

  The longitudinal direction of the operation lever 30 is along the longitudinal direction of the side frame 26. The operation lever 30 is easy to grip because the gripping surface 42 extends along the longitudinal direction of the side frame 26. The operation lever 30 is easy to operate. From this viewpoint, the angle formed by the longitudinal direction of the gripping surface 42 and the longitudinal direction of the side frame 26 is preferably 8 ° or less, more preferably 5 ° or less, and particularly preferably 3 ° or less. The longitudinal direction of the side frame 26 here means the axial direction of the side frame 26. The longitudinal direction of the gripping surface 42 means the direction in which the end surface extends when it is assumed that the recess 44 is not formed on the gripping surface.

  The longitudinal direction of the gripping surface 42 is linear. In other words, the gripping surface 42 of the operation lever 30 extends linearly along the longitudinal direction of the side frame 26 as a support frame. Thereby, this operation lever 30 is made easier to grip. The operation lever 30 is easily operated.

  A plurality of recesses 44 are formed in the gripping surface 42. The recess 44 is shaped along the finger of a human hand. When a stick-shaped object is gripped by the four fingers of the index finger, middle finger, ring finger, and little finger and the thumb, the four fingers from the index finger to the little finger are arranged. The gripping surface 42 is shaped along the four fingers that are lined up when gripping. It can be recognized that the gripping surface 42 is an intuitively gripped part. The operation lever 30 is easy to operate intuitively.

  The side frame 26 is formed with a recess 26a. When the operation lever 30 is in the release position, the operation lever 30 enters the recess 26a. Thereby, even when the holding surface 42 of the operation lever 30 is shaped along the longitudinal direction of the side frame 26 in the non-holding state, a sufficient rotation stroke can be obtained. The operation lever 30 does not need to be lengthened in the longitudinal direction in order to increase the rotation stroke. Since the operation lever 30 includes the recess 26a, the operation lever 30 is downsized while ensuring a sufficient rotation stroke.

  A two-dot chain line L1 in FIG. 4B indicates a virtual outline of the side frame 26 when it is assumed that the recess 26a is not formed. The operation lever 30 is U-shaped in a cross section perpendicular to the longitudinal direction. A part of the side frame 26 is positioned between the pair of left and right covers 47 of the operation lever 30. A part of the gripping surface 42 of the operation lever 30 is located inside the side frame 26 with respect to the virtual outline L1. The operation lever 30 has a sufficient rotation stroke. From the viewpoint of sufficiently securing this rotation stroke, it is preferable that at least a part of the gripping surface 42 is located in the recess 26a in the gripping state of FIG.

  Here, the operation lever 30 having a U-shape in a cross section perpendicular to the longitudinal direction has been described as an example, but the shape is not limited thereto. The operation lever 30 extending along the side frame 26 may have a shape that can secure a sufficient rotation stroke. For example, when the operation lever 30 is rotated, a part of the operation lever 30 may enter inside the hollow side frame 26. Further, the operation lever 30 may be rotatably attached to the left and right side surfaces of the side frame 26.

  In the operation lever 30, a protrusion 46 is formed at the longitudinal end of the gripping surface 42. This longitudinal end is located outside in the rotational radius direction of the operation lever 30. The protrusion 46 comes into contact with the side of the hand or finger that holds the operation lever 30. The protrusion 46 suppresses the hand from being displaced from the operation lever 30. The protrusion 46 allows the operation lever 30 to be operated even when the gripping force is weak. Even if the operation lever 30 is not gripped by the projection 46, the operation lever 30 can be operated by pushing the grip surface 42 with one finger.

  The recess 44 of the operation lever 30 is preferably recessed in such a direction that the armrest 6 rotates from the state of FIG. 4A to the state of FIG. Thereby, it is made easier to rotate the armrest 6 by the operation lever 30.

  In the operation lever 30, the protrusion 46 extends in a direction substantially orthogonal to the gripping surface 42. The protrusion 46 protrudes so as to contact the side surface of the hand or finger. The protrusion 46 protrudes in the direction in which the gripping surface 42 faces. The protrusion 46 may protrude in the direction in which the gripping surface 42 faces and may protrude from the operation lever 30 in the left-right direction. The protrusion 46 may be provided on the side frame 26 as a separate member from the operation lever 30 so as to face one end of the operation lever 30. The protrusion 46 may be provided adjacent to one end of the operation lever 30 so as to contact a hand or a finger that contacts the grip surface 42 of the operation lever 30.

  The protrusion 46 preferably protrudes in a direction in which the armrest 6 rotates from the state shown in FIG. 4B to the state shown in FIG. It is preferable that the protrusion 46 protrudes at a height higher than the thickness of the hand or finger. It is more preferable that the protrusion 46 protrudes inward in the longitudinal direction of the end face 42 from the end of the gripping face 42. Thereby, it becomes easy to catch on the hand or finger | toe which contact | abuts to the holding surface 42. FIG. The protrusion 46 may be formed in a position shape that is caught by a hand or a finger that grips the operation lever 30. What is necessary is just to form between the longitudinal direction one end and the other end of the holding surface 42 so that this hand or finger may be caught.

  Here, an example has been described in which a user on the wheelchair 2 operates, but an assistant may operate the operation lever 30.

  Here, the lower side of the operation lever 30 is the rotation center, but the upper side of the operation lever 30 may be the rotation center. The other end portion of the operation lever 30 may be positioned upward and pivotally attached to the side frame 26, and the rotating one end may be positioned downward.

  FIG. 5A shows a part of the leg support 8 in the fixed state shown in FIG. As shown in FIG. 3, the leg support 8 has a support arm 54 received by a support 70. The fixing pin 58 is biased by the spring 60. The rear end of the fixing pin 58 is locked in the hole 72 of the receiving tool 70. In this way, the leg support 8 is fixed.

  FIG. 5A shows the operation lever 56 at a fixed position. The operation lever 56 is in a non-gripping state. As described above, the fixing pin 58 is positioned rearward by being biased by the spring 60. The other end of the operation lever 56 is locked to the fixing pin 58. The operation lever 56 is urged away from the leg pipe 48.

  FIG. 5B shows the operation lever 56 in the release position. The operation lever 56 is in a gripping state. The operation lever 56 is gripped, and one end of the operation lever 56 is rotated in a direction approaching the leg support 48. The other end portion of the operation lever 56 is also rotated in a direction approaching the leg support 48. The fixing pin 58 is moved forward against the urging force of the spring 60. By moving the fixing pin 58 forward, the fixing pin 58 is retracted to a position where it does not engage with the hole 72 of the receiving tool 70.

  When the operation lever 56 is brought into the state of FIG. 5B, the leg support 8 is brought into a rotatable state. The leg support 8 is rotatable about the front pipe 16 as a rotation axis. In this rotatable state, the fixing pin 58 is not locked in the hole 72 of the receiving member 70. Further, the leg support 8 can be removed from the front pipe 16 by removing the insertion pin 52 from the front pipe 16.

  The usage method of this leg support 8 is demonstrated referring FIG.3, FIG.5 (a) and FIG.5 (b). As shown in FIG. 3, the leg support 8 in a fixed state is located in front of the main body frame 4. A user's foot is placed on the footrest 50 of the leg support 8.

  The user holds the operation lever 56. The operation lever 56 rotates to change from the fixed position to the release position. The engagement between the fixing pin 58 and the hole 72 is released. Thereby, the leg support 8 changes from a fixed state to a rotatable state. The leg support 8 is rotated about the front pipe 16 as a rotation axis.

  The leg support 8 is rotated outward in the left-right direction. The footrest 50 is rotated to the left and right outside of the main body frame 4. The leg support does not get in the way when the user sits on the seat from the front of the wheelchair 2. The user can easily get on and off the wheelchair 2.

  In this rotatable state, the leg support 8 is removable from the front pipe 16. The leg support 8 may be removed from the main body frame 4. The user can easily get on and off the wheelchair 2 by removing the leg support 8.

  Since the operation lever 56 includes a gripping surface 64, it can be gripped with four fingers from the index finger to the little finger in a line. Further, the operation lever 56 can be operated by placing the palm of the hand against the gripping surface 64.

  The longitudinal direction of the operation lever 56 is along the longitudinal direction of the leg pipe 48. Since the grip surface 64 of the operation lever 56 extends along the longitudinal direction of the leg pipe 48, it is easy to grip. The operation lever 56 is easy to operate. The gripping surface 64 extends linearly along the longitudinal direction of the leg pipe 48 that is a support frame. Thereby, the operation lever 56 is easily gripped.

  A plurality of recesses 66 are formed in the gripping surface 64. The recess 66 is shaped along the finger of a human hand. The gripping surface 64 is shaped along a finger that grips a rod-shaped object. It can be recognized that the gripping surface 64 is a part that is intuitively gripped by a hand. The operation lever 56 can be operated intuitively.

  In the operation lever 56, a protrusion 68 is formed at the longitudinal end of the gripping surface 64. This longitudinal end is located outside in the rotational radius direction of the operation lever 56. The protrusion 68 abuts on the side of the hand or finger that holds the operation lever 56. The protrusion 68 suppresses the hand from shifting from the operation lever 56. The operation of the operation lever 56 is facilitated by the projection 68.

  FIG. 6 shows the mounting structure of the insertion pin 52. The leg support 8 includes a screw 74, a nut 76, and a nut fixture 78. The nut fixture 78 includes an insertion portion 80 inserted into the upper end of the leg pipe 48, a flange 82 that contacts the end surface of the upper end of the leg pipe 48, and a convex portion 84 that protrudes outward in the radial direction of the flange 82. I have. A through hole 86 is formed in the insertion portion 80 in the radial direction of the insertion pin 52. The nut 76 is fixed in the middle of the through hole 86 of the insertion portion 80. The axial lines of the screw hole of the nut 76 and the through hole 86 coincide with each other. In the circumferential direction of the nut fixture 78, the protruding direction of the projection 84 coincides with the axial direction of the through hole 86. In other words, in the circumferential direction of the nut fixture 78, the protruding direction of the projection 84 coincides with the axial direction of the insertion pin 52.

  The insertion portion 80 of the insertion pin 52 is inserted from the upper end face of the leg pipe 48. The collar 82 is in contact with the end surface of the upper end of the leg pipe 48, and the leg pipe 48 is positioned in the axial direction. In the circumferential direction, the protrusion 84 is attached so that the protruding direction thereof coincides with the axis of the hole formed in the leg pipe 48. The position of the through hole 86 of the insertion portion 80 is matched with the position of the hole formed in the leg pipe.

  The insertion pin 52 includes a contact surface 88 along the outer peripheral surface of the leg pipe 48. A concave portion 90 is formed in the insertion pin 52. The concave portion 90 and the convex portion 84 are fitted together and positioned in the circumferential direction. Here, the convex portion 84 is formed on the flange 82 and the concave portion 84 is formed on the insertion pin 52. However, the concave portion may be formed on the flange 82 and the convex portion may be formed on the insertion pin 52, and may be positioned in the circumferential direction.

  In the leg support 8, the convex portion 84 is fitted into the concave portion 90, and the insertion portion 80 is restricted from rotating about the axis of the leg pipe 48. Thereby, the axes of the insertion pin 52, the through hole 86, and the nut 76 are easily matched. Positioning of the insertion pin 52 is facilitated. The mounting operation of the insertion pin 52 is facilitated. Since the nut 76 is fixed inside the nut fixture 78, the tips of the nut 76 and the screw 74 do not protrude outside the leg pipe 48. The user's clothing or the like is not scratched by the nut 76 or the screw 74.

  FIG. 7 shows a partial structure of the leg support 8. The leg support 8 includes a pulling bar 92, a leg post 94, an oblique mill 96, a support shaft 98, a collar 100, and a ring 102. The support shaft 98 extends from the leg post 94 in a substantially horizontal direction. The footrest 50 is rotatably attached to the support shaft 98.

  The lifting rod 92 includes a head portion 92a positioned at the lower end, a screw portion 92b positioned at the upper end portion, and a groove 92c formed between the head portion 92a and the screw portion 92b. The inner peripheral portion of the ring 102 is fitted into the groove 92c. The movement of the ring 102 is restricted by the groove 92c with respect to the longitudinal direction of the pulling rod.

  The leg post 94 has a cylindrical pipe shape. The collar 100 is inserted from the lower end of the leg post 94, and the collar 100 is fixed to the leg post 94. A through hole 100 a is formed at the center of the collar 100. A pulling bar 92 is passed through the collar 100. The head portion 92a of the pulling rod 92 and the ring 102 sandwich the collar 100 in the axial direction. The groove on the inner peripheral surface of the leg post 94 and the collar 100 sandwich the outer peripheral portion of the ring 102 in the axial direction. Accordingly, the movement of the leg post 94 is restricted with respect to the longitudinal direction of the lifting rod 94 via the ring 102.

  A slope 94 a that is inclined with respect to the axial direction is formed at the upper end of the leg post 94. A slope 96 a that is inclined with respect to the axial direction is formed at the lower end of the millstone 96. The screw mill 96 is formed with a screw hole 96b penetrating in the vertical direction. The screw portion 92b of the lifting rod 92 is screwed into the screw hole 96b. In a state where the lifting bar 92 and the mortar 96 are screwed together, the inclined surface 94 a of the leg post 94 and the inclined surface 96 a of the mortar 96 are opposed to each other.

  The upper end portion of the leg post 94 and the oblique mill 96 are inserted into the leg pipe 48. When the lifting bar 92 is screwed into the oblique mill 96, the inclined surface 96 a of the oblique mill 96 is pressed against the inclined surface 94 a of the leg post 94. The leg posts 94 project outward in the radial direction of the lifting rod 92 along the slope 96a. The oblique mill 96 projects outward in the radial direction of the lifting bar 92 along the slope 96a. The leg post 94 and the oblique mill 96 are pressed against the inner peripheral surface of the leg pipe 48. The leg post 94 and the mortar 96 are positioned with respect to the leg pipe 48 by projecting outward in the radial direction.

  In the leg support 8, the leg post 94 is restricted from moving in the axial direction with respect to the lifting rod 92. When the screws of the lifting bar 92 and the mortar 96 are loosened, the pressing force of the leg post 94 and the mortar 96 against the inner peripheral surface of the leg pipe 48 is weakened. The leg post 94 and the mortar 96 are movable in the longitudinal direction of the leg pipe 48.

  The leg post 94 and the mortar 96 are moved along the inner peripheral surface of the leg pipe 48. Again, the lifting bar 92 is screwed into the mill 96. The leg post 94 and the mortar 96 are positioned with respect to the leg pipe 48. In this way, the height position of the leg support 8 is adjusted along the axis of the leg pipe 48.

  The leg post 94 is restricted from moving in the longitudinal direction of the lifting rod 92, and the lifting rod 92 is rotatable with respect to the leg post 94 about its axis. As a result, the screws of the pulling bar 92 and the mortar 96 are loosened, so that the leg post 94 and the mortar 96 are reliably pulled apart. As a result, the leg post 94 and the mortar 96 can be easily moved with respect to the leg pipe 48. Further, the movement of the leg post 94 is restricted with respect to the longitudinal direction of the lifting rod 92 via the ring 102. Thereby, even if the screws of the lifting bar 92 and the mortar 96 are loosened, the lifting bar 92 does not come off the leg post 94. The leg post 94, the oblique mill 96 and the lifting bar 92 can be moved together in the axial direction of the leg pipe 48.

  FIG. 8 shows the mounting structure of the front wheel 14. The front wheel 14 is a so-called caster. The front wheel 14 includes a wheel 102, a mounting shaft 104, a washer 106, a spring 108, and a nut 110. The wheel 102 is attached to the main body frame 4 via the attachment shaft 104. The wheel 102 is attached so as to be rotatable about the axis of the attachment shaft 104.

  A screw 104 a is formed on the upper end portion of the mounting shaft 104. A flange 104b is formed on the mounting shaft 104. The flange portion 104 b protrudes outward in the radial direction of the mounting shaft 104. A flat surface 104c extending in parallel with the axis of the mounting shaft 104 is formed on the outer periphery of the flange portion 104b. In the mounting shaft 104, the outer peripheral surface of the flange portion 104 has the same shape as the outer peripheral surface of the hexagon nut.

  A fixture 112 of the front wheel 14 is fixed to the lower end portion of the front pipe 16 of the main body frame 4. The fixture 112 is formed with a hole 112a penetrating in the vertical direction. A protrusion 112 b that protrudes downward is formed on the lower surface of the fixture 112.

  The mounting shaft 104 is passed through the hole 112 a of the mounting tool 112. The flange portion 104 b is in contact with the lower surface of the fixture 112. A washer 106 and a spring 108 are passed through the upper end of the mounting shaft 104. A screw 104 a is screwed into the nut 110.

  In the front wheel 102, when the mounting shaft 104 is rotated about its axis, the projection 112b comes into contact with the flange 104b. The protrusion 112b contacts the flat surface 104c of the flange 104b. The mounting shaft 104 is prevented from rotating by the protrusion 112b. The projection 112b eliminates the need to stop the attachment shaft 104 with a tool when the nut 110 is tightened. In the front wheel 102, the nut 110 can be easily tightened and loosened.

  The configuration described above can be widely applied to wheelchairs.

2 ... Wheelchair 4 ... Body frame 6 ... Armrest 8 ... Leg support 14 ... Front wheel 16 ... Front pipe 18 ... Upper pipe 20 ... Back pipe 22 ... Armrest pipe 24 ... armrest 26 ... side frame 28 ... guide panel 30, 56 ... operating lever 32,58 ... fixing pin 34,60 ... spring 36,70 ... receiver 38 .. Recess 40, 72 ... Hole 42, 64 ... Holding surface 44, 66 ... Recess 46, 68 ... Protrusion 47 ... Cover 48 ... Leg pipe 50 ... Footrest 52 ... Insertion pin 54 ... Support arm 62 ... Abutment surface 74 ... Screw 76 ... Nut 78 ... Nut fixing tool 80 ... Insertion part 82 ... ８４ 84 ... Convex part 86 ... Through hole 88 ... Contact surface 90 ... Recess 92 ... Lifting rod 94 ... Leg post 96 ... Diagonal mill 98 ... Support shaft 100 ... Collar 104 ... Mounting shaft 112 ... Fittings

Claims (4)

A main body frame, and a support member rotatably attached to the main body frame,
The support device includes an operation lever that switches the support device between a rotatable state and a fixed state, and a support frame that extends along a longitudinal direction of the operation lever. It is made rotatable
One end of the operation lever is rotated to a release position where the operation lever approaches the support frame, so that the support tool can be rotated. And
This operating lever has a gripping surface extending in the longitudinal direction of the support frame,
A recess is formed on the outer surface of the support frame,
This dent is formed facing the operating lever,
When it is assumed that this dent is not formed, the virtual outline of the support frame is L1,
When the operation lever is in the release position, at least a part of the gripping surface is located inside the support frame from the virtual outline L1, and is located in the recess .
This support frame is a side frame,
The operating lever includes a cover that extends from the gripping surface and covers a part of the left and right side surfaces of the side frame,
A wheelchair in which the operating lever covers the dent by the gripping surface and the cover .   The wheelchair according to claim 1, wherein the gripping surface extends along the longitudinal direction of the support frame.   The wheelchair according to claim 1 or 2, wherein a plurality of recesses are formed in the grip surface along the longitudinal direction of the operation lever. The wheelchair according to any one of claims 1 to 3, further comprising a protrusion capable of coming into contact with a hand or a finger that operates the operation lever on one end side of the operation lever.

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