JP5204688B2 - Automatic wheelchair locking mechanism - Google Patents

Description

  The present invention relates to a mechanism for automatically locking main wheels when getting on and off a wheelchair. More specifically, when getting on and off the wheelchair, the main wheel is locked so that it does not move when a wheelchair occupant gets on and off, and the lock on the main wheel is locked when a constant weight is applied such as when the user sits on the wheelchair. The present invention relates to an automatic locking mechanism for a wheelchair to be released.

  In the absence of a helper, when a handicapped user tries to get on and off the wheelchair, the wheelchair suddenly starts moving, and the user who tries to get on and off falls frequently and is injured. In order to prevent such accidents, various measures have been taken to prevent accidents such as the main wheels being braked in advance when the wheelchair is getting on and off to prevent the wheelchair from suddenly moving and falling down when the wheelchair gets on and off. ing.

  Patent Document 1 discloses a wheelchair comprising: means for pressing a wheelchair tire to apply a brake; and power applying means for applying a driving force to the operating means when a person sits on the wheelchair. A brake device, wherein the operating means is rotatably attached to a support shaft 1 erected on a support plate 1 provided on a main body frame, and is used for manually applying a brake; and the support plate 1 A brake arm that is rotatably attached to a support shaft 2 that is erected on one side and that presses a tire, and a link that is rotatably attached to the brake lever at one end and links the movement of the brake lever to the brake arm. And one end is hung in the hole provided in the support plate 2, the other end is hung in the hole provided in the brake lever, and the brake arm is pressed against the tire by a restoring force. A tire lock spring, one end of which is fixed to the support plate 2, the other end is rotatably attached to the brake lever, and the driving force applied by the power means is greater than the restoring force of the tire lock spring. There is disclosed a wheelchair brake device comprising: a tire release cylinder which converts the brake arm into a tire release from the tire pressure. The lock mechanism of Patent Document 1 is a mechanism in which, when a user sits on a seat, a wire is pulled with the weight and a conventional manual brake is applied.

  In the claim of Patent Document 2, in a brake device that includes at least a seat portion and a backrest portion for a user to sit on, and is mounted at a lower position of a wheelchair in which a front wheel and a rear wheel are mounted on a main body frame. A rolling wheel that is grounded to a rolling surface such as a floor surface, a support that rotatably supports the rolling wheel, an urging means that biases the support downward, and the support A lower projecting port that has an opening width that is narrower than the diameter of the rolling wheel and projects the lower part of the rolling wheel, and the rolling wheel has the support body that is urged by the urging force of the urging means. A first position where the abutting portions formed on both sides of the lower protrusion and the outer peripheral surface abut against each other in the pressed state, and the support body is the same against the urging force of the urging means. The outer peripheral surface of the rolling wheel is the same abutting portion when moved up relatively from the first position. Roll brake device characterized by may take a second position in which al spaced is disclosed. The lock device of the cited document 2 has a rolling wheel braked by a spring between the main wheels of the wheelchair. When the user gets on the wheelchair, the spring expands and contracts so that the rolling wheel becomes movable. Is configured to move.

  The claim of Patent Document 3 describes a wheel lock device for a wheelchair characterized by having the following requirements. (B) An operating member that moves up and down in conjunction with the upper and lower sides of the seating surface is provided below the seating surface, and an engaging plate is rotatably provided on the lower surface of the operating member. The plywood is linked to an engagement shaft that engages with and disengages from an engagement hole formed in a disk attached to a wheel. (C) A large number of the engagement holes are annularly arranged around the disk. D) The engagement plate rotates in a direction to engage the engagement shaft with the engagement hole of the disk when the operation member is moving upward, and the engagement plate is engaged when the operation member is moving downward. A wheel lock device for a wheelchair is disclosed in which a shaft is rotated in a direction in which the shaft is retracted from the engagement hole of the disk. The locking device of Patent Document 3 is used by attaching a disk with a hole (engagement hole) to the main wheel and fixing the wheelchair with the pin (engagement shaft) engaged with the hole when the vehicle is stopped. When the person sits down, the pin (engagement shaft) comes off and the wheelchair becomes movable.

  As described above, a lock device is disclosed in which a wheelchair is locked when the wheelchair is empty when the wheelchair is getting on and off, and the lock is released when a person gets on. Each locking device has its own characteristics, but there are problems such as insufficient fixation and large devices, and the appearance of a locking device that can be easily installed and securely locks the wheelchair. It was desired.

JP 2007-215723 A JP 2007-283082 A JP 2007-307348 A

  The present invention provides a wheelchair automatic locking mechanism that is easy to mount and can be securely locked. More specifically, when a wheelchair user gets on and off the wheelchair alone, the wheelchair does not suddenly move and fall over when sitting on the wheelchair or getting up from the wheelchair. Provides a wheelchair automatic locking mechanism that unlocks the wheelchair wheel when the user is seated and loads, and locks to prevent the wheelchair wheel from moving when the user lifts his / her hip from the wheelchair It is.

  The wheelchair user gets off the wheelchair to eliminate the accident that the user falls and gets injured when the user tries to get off the wheelchair when the caregiver is not wearing Therefore, the present invention provides an automatic lock mechanism for a wheelchair in which a wheelchair wheel is locked when the waist is lifted.

  A feature of the present invention is that a gear portion that is attached to an axle of a main wheel of a wheelchair, a movable portion that has a meshing portion that comes into contact with the gear portion and prevents the rotation of the gear portion, and a seat that sits under a cushion. An automatic brake mechanism of a wheelchair comprising a sensing plate for sensing a person's weight, wherein the sensing plate comprises a pressing plate and a supporting plate, and a sliding member is attached between the pressing plate and the supporting plate, and the sliding When the member is loaded by the weight of the occupant, the pressing plate descends and the sliding member slides, the wire connected to the sliding member is pulled, and is attached to the main wheel connected to the wire The wheelchair automatic locking mechanism is characterized in that the meshing between the gear portion and the meshing portion engaged with the gear portion is disengaged so that the main wheel of the wheelchair can be rotated.

  The automatic locking mechanism of the present invention includes a disc-shaped gear portion that is attached to an axle of a main wheel of a wheelchair, a movable portion that has a meshing portion that contacts the gear portion and prevents rotation of the gear portion, An automatic locking mechanism of a wheelchair comprising a sensing plate for sensing the weight of a occupant, wherein the sensing plate comprises a pressing plate and a supporting plate, and a sliding member is installed between the pressing plate and the supporting plate, The sliding member is lowered by the weight load of the occupant, the sliding member slides, the wire connected to the sliding member is pulled, and is attached to the main wheel connected to the wire. The wheelchair automatic locking mechanism is characterized in that the main wheel of the wheelchair is rotatable by disengaging the provided gear portion and the meshing portion engaged with the gear portion.

  The sensing plate of the automatic locking mechanism is attached to the seat portion of the wheelchair. The sensing plate is composed of a pressing plate and a supporting plate, and a sliding member is slidably mounted between the pressing plate and the supporting plate. When the seated person sits down, the pressing plate is lowered, and between the pressing plate and the supporting plate. The sliding member slides, the wire connected to the sliding member is pulled to engage the gear portion and the meshing portion, and the gear is locked to prevent the main wheel from rotating.

  In the automatic locking mechanism of the present invention, a sensing plate comprising a pressing plate and a supporting plate is mounted on a seat portion of a wheelchair, a gear portion is attached to an axle of a main wheel, and a meshing portion meshing with a gear is a gear such as a rear frame. Is simply installed at a position where the meshing portion can be easily meshed with each other, and can be easily installed on a normal wheelchair.

  The wheelchair according to claim 1, wherein another feature of the present invention is that the sliding member is pivotally attached to a shaft attachment portion of the pressing plate, and the sliding member is slidable back and forth by the upper and lower sides of the pressing plate. This is an automatic locking mechanism.

  According to another aspect of the present invention, there is provided at least two teeth of a gear attached to the main wheel and a meshing portion meshing with the gear of a meshing portion meshing with the gear. The wheelchair automatic locking mechanism according to any one of the above.

  The wheelchair locking mechanism is characterized in that the gear portion attached to the main wheel and the meshing portion meshing with the gear have at least two teeth. To prevent the teeth from breaking when the gear of the gear portion and the meshing portion mesh with each other, and to increase the meshing strength, the trough of the gear portion and the teeth of the meshing portion are meshed with at least two teeth.

  Another feature of the present invention is that a hole is formed in place of the teeth of the gear portion attached to the main wheel, and a pin that fits into the hole of the gear portion is attached to the meshing portion. The wheelchair automatic locking mechanism is characterized by the following.

  A wheelchair for fixing a main wheel of a wheelchair by drilling a hole in place of the teeth of the gear unit, engaging the pin in the hole drilled in place of the gear of the gear unit instead of the pin of the meshing unit The automatic locking mechanism can also be used.

  Another feature of the present invention is that a rubber member is affixed in place of the teeth of the gear part and the meshing part attached to the main wheel, and the rubber member affixed to the gear part and the meshing part abuts, An automatic locking mechanism for a wheelchair characterized in that rotation is prevented by a frictional force.

  The wheelchair automatic locking mechanism of the present invention has a simple structure and is easy to mount. The sliding member attached to the sensing plate unlocks the main wheel by sliding over a short distance, so there is little up-and-down movement when getting on and off the wheelchair, so there is an effect that you can get on and off smoothly. doing.

  Furthermore, by changing and adjusting the sliding member, the strength of sliding according to the weight of the wheelchair user can be easily adjusted.

It is a front view of the wheelchair equipped with the automatic locking mechanism of the wheelchair. It is a perspective view which shows the state in which the sensing plate is open. It is a perspective view which shows the state which the sensing plate closed. It is sectional drawing of a sensing plate. It is a top view of a sensing plate. It is a perspective view of a sensing plate. It is a perspective view of the locking mechanism connected with the wire from the sensing plate. It is a fragmentary perspective view which shows the meshing state of the gear of the gear part of the locking mechanism of a wheelchair, and a meshing part. It is a fragmentary perspective view which shows the state by which the gear of the gear part of the locking mechanism of a wheelchair and the meshing part were open | released. It is a fragmentary perspective view which shows the state with which the meshing part meshed | engaged with the gearwheel, and the open state. FIG. 5 is a perspective view of a locking mechanism in which a hole is formed instead of a gear of a gear part of a locking mechanism of a wheelchair, and a pin that fits into the hole is attached to a meshing part. It is a perspective view of the locking mechanism which replaced with the gear of the gear part of the locking mechanism of a wheelchair, installed the rubber member, and provided the engaging part in the meshing part.

  The wheelchair automatic brake mechanism of the present invention will be described below with reference to the drawings, but the present invention is not limited to the following embodiments.

FIG. 1 is a front view of a wheelchair equipped with an automatic locking mechanism 100 for a wheelchair according to the present invention. A backrest 13 is stretched between the left and right rear frames 11 on which the grip portion 12 is mounted, and a cross bar 15 is mounted on the inside. A main wheel 14 is mounted on both sides of the rear frame 11, a stopper unit 30 of the locking mechanism 100 is mounted inside the main wheel 14, and a sensing plate 20 for operating the stopper unit 30 is mounted on the seat. Shows the state.
Since the seat is divided into two parts, the wheelchair can be folded as usual. In addition, the conventional one cannot be used unless the seat surface is made of cloth because the lock cannot be released unless the buttocks are lowered when sitting on the seat surface. In contrast, the sensing plate of the present invention can be mounted on a wheelchair having a fixed seat.

  FIG. 2 is a sensing plate 20 of the automatic locking mechanism 100 of the wheelchair of the present invention mounted on the upper part of the seat 16 of the wheelchair. The sensing plate 20 is wrapped with an elastic material such as a sponge as the elastic member 38, and covered with a decorative seat cover 39 from above. FIG. 2 shows a state in which the sensing plate 20 mounted on the upper part of the seat 16 of the wheelchair is open. The state where the sensing plate 20 is open is a state where the occupant is not seated, and the state where the stopper unit 30 of the automatic locking mechanism 100 locks the main wheel 14 of the wheelchair.

  Since the cushion and the sensing plate can be separated, the cushion can be replaced, the cover can be easily removed to change the cover pattern, and washing can be performed.

  FIG. 3 shows a state in which the sensing plate 20 of the automatic brake mechanism 100 of the wheelchair of the present invention attached to the upper part of the seat 14 of the wheelchair is closed. That is, when the occupant is seated and the sensing plate 20 is in a closed state, the stopper unit 30 of the automatic locking mechanism 100 is released.

  4 shows a cross-sectional view of the sensing plate 20, and FIG. 4 (4-1) shows a state in which the sensing plate 20 is closed (the stopper unit 30 of the automatic locking mechanism is released). When the sensing plate 20 is closed, the upper pressing plate 21 of the sensing plate 20 and the lower end of the supporting plate 22 are in contact with each other. When the pressing plate 21 is closed by the weight of the occupant, the sliding member 23 attached to the pressing plate 21 slides toward the front of the wheelchair, and the sliding member 23 and the shaft mounting portion 24 are arranged substantially in parallel. It becomes a state. The wire 25 connected to the sliding member 23 is pulled as the sliding member 23 slides forward, and the stopper unit 30 including the gear portion 33 and the meshing portion 34 attached to the main wheel 14 is released. .

  FIG. 4 (4-2) shows a state where the sensing plate 20 is opened. From the state in which the sliding member 23 and the shaft attachment portion 24 are substantially parallel, the sliding member 23 stands between the pressing plate 21 and the support plate 22, and the wire 25 connected to the sliding member 23 extends. Thus, the meshing portion 33 meshes with the gear portion 32 attached to the main wheel 14 of the stopper unit 30 composed of the gear portion 32 and the meshing portion 33 so that the main wheel is locked.

  FIG. 5 shows a top view of the sensing plate 20 comprising the pressing plate 21 and the support plate 22 hinged by a hinge 26. Between the pressing plate 21 and the support plate 22, there is a sliding member 23 and a shaft attaching portion 24 for axially attaching the sliding member 23, and the wire 25 for transmitting the movement of the sliding member 23 to the meshing portion 33 and protecting it. A conduit 27 is installed.

  FIG. 6 is a perspective view of the sensing plate 20 including the pressing plate 21 and the support plate 22. Between the pressing plate 21 and the support plate 22, there is a sliding member 23 and a shaft mounting portion 24 for axially mounting the sliding member 23, and a wire 25 for transmitting the movement of the sliding member 23 to the meshing portion 33 of the stopper unit 30. A conduit 27 for protecting it is installed. The tip of the wire 25 is fixed to the sliding member 23 with a wire stopper 25a. When the seated person sits down, the pressing plate 21 is lowered, the sliding member 23 slides forward, and the wire 25 is pulled. The stopper unit 30 is released. When the occupant raises his / her waist, the pressing plate 21 is raised (returned to the original) by the spring member 26a biased by the hinge 26, the wire 25 is loosened, and the meshing portion 33 is engaged with the gear portion 32 of the stopper unit 30. Engage and brake.

  In FIG. 7, the sensing plate 20 is placed on the seat portion 16, and is clamped to the rear frame of the seat portion by the fixtures 22 a and 22 b of the support plate 22. The wire 25 is fixed to the movable part 35 by a stopper 25b through a spring member 25c through the movable part 35 of the stopper unit 30 of the locking mechanism.

  In the automatic locking mechanism 100 of the present invention, a sensing plate 20 including a pressing plate 21 and a support plate 22 is mounted on a seat portion 16 of a wheelchair, and a stopper unit 30 of the automatic locking mechanism 100 has a gear portion 32 on an axle 18 of a main wheel. The engaging portion 33 that engages with the gear portion 32 is merely attached at a position where the gear such as the rear frame 11 and the engaging portion 33 can be easily engaged with each other, even if the automatic locking mechanism 100 is not mounted from the beginning. It can be easily installed in a wheelchair currently in use.

  FIG. 8 shows the connection position of the locking mechanism of the present invention and the wire 25 and the position of the operation lever 28 when operated manually. The stopper unit 30 of the locking mechanism 100 is attached to the axle 18 of the main wheel 14 and the rear frame 11, and the meshing portion 33 engages with the gear portion 32 of the stopper unit 30. An operation lever 28 can also be installed so that an assistant can operate. A gear portion 32 is installed between the main wheel 14 on which the hand rim 29 is installed and the disc brake 37. One of the meshing portions 33 that mesh with the gear of the gear portion 32 is attached to the axle 18 and the other is attached to the rear frame 11, and the wire 25 is connected from the sensing plate 20 attached to the seat portion 16 to engage the gear portion 32 and the meshing portion 33. The occlusion is removed.

  Since the operation lever 28 of the locking mechanism 100 of the present invention does not need to be operated at all times, the operation can be performed at the rear part of the wheelchair. The operation lever 28 is moved in a state where the locking mechanism 100 is released when the wheelchair is moved without putting a person on it.

  FIG. 9 shows the connection position of the locking mechanism of the present invention and the wire 25 and a state where the manual operation lever 28 is pushed down to release the meshing portion 33 from the gear portion 32. In the drawing, a spring member 36 is a spring member 36 for a disc brake 37 and is used for a brake operation during traveling or the like.

  The operation lever 28 is operated to lock the main wheel 14 when getting on and off the wheelchair, or when the main wheel 14 is locked when the wheelchair is moved without a seated person, the wheelchair is lifted and moved. Therefore, the locking mechanism is released by the operation lever 28 and moved.

  The support part 34 is pivotally attached to the rear frame or the like because the hole in which the axle 18 of the rear frame 11 is pivotally attached can be used. Can be mounted on a ready-made wheelchair.

  FIG. 10 (10-1) shows a state where the gear portion 32 and the meshing portion 33 of the locking mechanism are meshed with each other. FIG. 10 (10-2) shows that the gear portion 32 and the meshing portion 33 of the locking mechanism are in an open state.

  The size of the gear of the gear portion 32 is preferably about 80 mm to 110 mm, more preferably about 85 mm to 95 mm. If it is too large, the meshing part becomes large, and there is a problem that the weight of the wheelchair increases. On the other hand, if it is too small, the meshing portion becomes small, and there is a risk that the meshing portion is dissociated or broken by a slight impact. It is desirable that at least two meshing portions of the valley of the gear portion 32 and the valley of the meshing portion 33 are meshed. When there is only one meshing portion 33, the meshing portion 33 is caused by slight impact or vibration. Breaking may be considered, and the meshing portion is meshed with at least two ridges so as to increase the mesh strength. The depth of the trough of the gear is preferably about 2.0 mm to 4.0 mm. If the trough of the gear portion 32 is too deep, a large force is required to pull out the meshing portion 33, and if it is too shallow, there is a risk that it will come off with a slight impact.

  FIG. 11 shows a locking mechanism in which a hole 32b is formed instead of the gear of the gear part 32 of the locking mechanism of the wheelchair, and a pin 33b fitted in the hole 32b formed in the gear part 32 is attached to the meshing part 33. Show.

  FIG. 12 shows a locking mechanism in which a rubber member 32c is attached instead of the gear of the gear portion 32 of the wheelchair locking mechanism, and an engaging portion 33c is provided at a position where the engaging portion 33 contacts the gear portion 32. .

100: Automatic wheelchair locking mechanism 11: Rear frame 12: Grasping part 13: Backrest part 14: Main wheel 15: Cross bar 16: Seat part 17: Armrest 18: Axle 19: Footrest 20: Sensing plate 21: Pressing plate 22: Support plate 23: sliding member 24: shaft attachment portion 25: wire 26: hinge 27: conduit 28: operation lever 29: hand rim 30: stopper unit 31: spring member 32: gear portion 33: engagement portion 34: support portion 35: Movable portion 36: disc brake spring member 37: disc brake 38: elastic member 39: cover

Claims (5)

  A gear part that is attached to the axle of the main wheel of the wheelchair, a movable part that has a meshing part that abuts on the gear part and prevents the rotation of the gear part, and is placed under the cushion to sense the weight of the occupant An automatic brake mechanism for a wheelchair comprising a sensing plate, wherein the sensing plate comprises a pressing plate and a supporting plate, and a sliding member is attached between the pressing plate and the supporting plate, and the sliding member is attached to a seated person's seat. The pressing plate descends due to weight load, the sliding member slides, the wire connected to the sliding member is pulled, and the gear portion attached to the main wheel connected to the wire and the gear portion An automatic locking mechanism for a wheelchair, characterized in that the meshing portion engaged with the gear portion is disengaged and the main wheel of the wheelchair is rotatable.   The automatic locking mechanism for a wheelchair according to claim 1, wherein the sliding member is pivotally attached to a shaft attachment portion of the pressing plate, and the sliding member can slide back and forth by the upper and lower sides of the pressing plate.   The wheelchair automatic according to any one of claims 1 to 2, comprising at least two teeth of a gear attached to a main wheel and a meshing portion meshing with the gear of a meshing portion meshing with the gear. Locking mechanism.   A hole is formed in place of the teeth of the gear portion attached to the main wheel, and a pin that fits into the hole of the gear portion is attached to the meshing portion. The automatic locking mechanism for a wheelchair according to claim 2.   A rubber member is affixed in place of the gear portion and meshing portion teeth attached to the main wheel, and the rubber member affixed to the gear portion and the meshing portion abuts to prevent rotation by its frictional force. The automatic locking mechanism for a wheelchair according to claim 1, wherein the automatic locking mechanism is used.

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