JP3554223B2 - wheelchair - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wheelchair that can safely carry a passenger without falling down accidentally by a caregiver.
[0002]
[Prior art]
As is well known, a wheelchair carries a difficult-to-walk passenger, such as a sick person, the elderly, or a physically handicapped person, and is operated by a caregiver for safe transportation. As shown in FIG. 1, a conventionally known wheelchair 1 is provided with a large-diameter rear wheel 3 on the traveling frame 2 and a small-diameter traveling front wheel 4 at the center of the traveling frame 2. In this configuration, a passenger is seated on the second seat frame 5 and a caregiver operates and drives the rear handle 6 at the rear. Japanese Utility Model Publication No. 5-2175 discloses a wheelchair in which left and right leg frames 7 provided on the front side of the traveling frame 2 are provided with gripping arms 8 extending forward from the seat frame 5. Proposed. When the gripping arm 8 travels on an uneven traveling surface, a step, a narrow groove, or the like, the caregiver lifts the front wheel 4 so that the rear wheel 3 moves over the step, groove, or the like. Since the left and right gripping arms 8 extend forward from the wheelchair 1 horizontally, the wheelchair 1 becomes extremely obstructive and the wheelchair 1 cannot be folded in a non-use state. As shown in FIG. By making it rotatable between the horizontal state and the leg frame, or by being slidable in the front-rear direction in the horizontal state as shown in FIG. 4, it can be converted into a use state and a non-use state in each case. I have.
[0003]
[Problems to be solved by the invention]
However, when the gripping arm 8 is slidable in the front-rear direction as shown in FIG. 4 of the above-mentioned publication, at least the front-rear width of the seat frame 5 of the wheelchair 1 needs to be equal to the length of the gripping arm 8. However, since a stopper mechanism for stopping the use state and the non-use state of the gripping arm 8 is necessary, it is bulky and not only difficult to handle, but also expensive, and thus has no commercial value. In particular, the wheelchair 1 is used by the sick, the elderly, the physically handicapped, etc., so it is not a good product unless it is functional and inexpensive. Can not be marketed at all.
[0004]
Further, as shown in FIG. 2 of the above-mentioned publication, when the gripping arm 8 is rotatable between a horizontal use state and a non-use state along the leg frame, it is easy to tilt downward in the use state. With such a structure, as shown in FIG. 2, when the wheelchair 1 tries to get over the groove a, when the gripping arm 8 is pulled forward so that the wheelchair 1 moves forward, the rear wheel 3 The gripping arm 8 tilts in the direction of the non-use state as shown by the arrow A, and as a result, the wheelchair 1 tilts backward of the arrow B. An accident occurs in which the occupant seated at No. 5 is thrown backward.
[0005]
As shown in FIG. 3, when the wheelchair 1 tries to get over the step b, if the gripping arm 8 is pulled forward to advance the wheelchair 1, the rear wheel 3 is locked at the step b and suddenly , The gripping arm 8 slightly tilts in the direction of non-use as shown by the arrow C, and as a result, an accident occurs in which the occupant falls forward of the arrow D.
Therefore, if the gripping arm 8 is provided rotatably with respect to the wheelchair 1, an extremely dangerous personal injury may occur unless the caregiver operating the gripping arm 8 pays much attention. There is a demand for a wheelchair 1 that does not cause such an accident, has various functions, and can be provided at low cost.
[0006]
[Means for Solving the Problems]
The present invention has been proposed in view of the above-mentioned conventional drawbacks and in view of the conventional needs, and is applied to an outer surface of a leg frame provided on a front side of a traveling frame of a wheelchair body, and is attached to a half part. A bracket mechanism having a first bracket to be mounted and a second bracket attached to the other half of the leg frame is fixed to the leg frame, and a caregiver is actuated on the front side of the wheelchair body. A gripping arm that can be changed between a use state and a non-use state by a rotatable mechanism is provided on the bracket mechanism, and a regulating unit that does not easily convert the gripping arm from the use state to the non-use state is provided. It is characterized by being provided on the bracket mechanism .
[0007]
Further, according to the present invention, the gripping arm extends substantially horizontally to the front side of the wheelchair body in use, consists of the non-use state is a state along the leg frame, regulating means, gripping arm The spring material of the dishwasher with strong elasticity and restoring force fitted to the pivot axis of the spring, and the restricting means are connected by a string material, hooked on a wheelchair, and stored on the pivot side of the gripping arm. It is intended to include a configuration that is provided with a stopper pin that can be inserted and removed.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
FIGS. 4 to 7 show a first embodiment of the present invention. FIG. 4 is an exploded perspective view, FIG. 5 is a plan view showing a part of the embodiment, FIG. 8 and 9 show a front view of an unused state, FIGS. 8 and 9 show a second embodiment of the present invention, FIG. 8 is an exploded perspective view, and FIG. 9 is a front view.
[0009]
The wheelchair 1 of the present invention has the same structure as the above-described conventional wheelchair, and also has the same structure in which the left and right leg frames 7 of the wheelchair 1 are provided with the gripping arms 8 respectively. However, each of the gripping arms 8 is rotatably provided on the leg frame 7 by the bracket mechanism 9, and the regulating mechanism 10 is provided on the bracket mechanism 9, so that the gripping arm 8 is changed from the use state to the non-use state. It is controlled so that it is not easily converted.
[0010]
According to the first embodiment of the present invention shown in FIGS. 4 to 7, the bracket mechanism 9 includes a first bracket 91 attached to one half of the leg frame 7 and another half of the leg frame 7. A second bracket 92 to be attached to each of the brackets, the brackets 91 and 92 being applied to the outer surface of the leg frame 7 and bolts 93 being inserted in series between the flanges provided on the left and right sides of each bracket so as to form a nut. By fixing the bracket 94, the bracket mechanism 9 can be fixed to the leg frame 7.
[0011]
The second bracket 92 is provided with an L-shaped support seat 95 extending forward from the leg frame 7, and the support seat 95 is provided with a support hole 96 for the gripping arm 8 and a stopper 97. The support hole 96 is a female screw.
[0012]
At the base end of the gripping arm 8, a flat mounting piece 81 having a circular edge is provided, and a through hole 82 corresponding to the support hole 96 is formed at the center of the mounting piece 81. An arc-shaped groove 83 with which the stopper 97 is engaged is formed in a part of the outer edge.
[0013]
Therefore, the mounting piece 81 is applied to the surface of the support seat 95, a washer or a spacer is fitted to a fixing bolt 98 serving as a pivot shaft, inserted into the through hole 82 and screwed into the support hole 96, and When a fixing nut 99 is fastened to an end of a fixing bolt 98 protruding from the back surface of the base 95, the gripping arm 8 can be rotatably attached to the bracket mechanism 9, and the stopper 97 is engaged with the groove 83. Therefore, the gripping arm 8 can be rotated only within the arc-shaped range of the groove 83 around the fixing bolt 98 as the rotation center axis.
[0014]
In the embodiment shown in the drawing, the groove 83 is formed in the outer peripheral edge of the mounting piece 81 at a lower part on the distal end side at an angle range of 90 degrees, so that the gripping arm 8 is between the horizontal state and the vertical state facing downward. Can be rotated, the horizontal state is a use state, and the vertical state is a non-use state.
[0015]
In the first embodiment of the present invention, a spring member 101 which is a dish washer having a strong elastic force and a strong restoring force is used as the restricting means 10.
The spring member 101 is an endless annular member made of metal and has a circular cross section in the radial direction or an inclined shape, a large elastic coefficient, and a remarkably high restoring force and pressing force.
[0016]
Therefore, the spring member 101 is fitted between the head of the fixing bolt 98 and the surface of the mounting piece 81 with a flat washer or the like interposed therebetween, and the mounting piece is fixed by the fixing bolt 98 and the fixing nut 99. When the clamp 81 and the support seat 95 are tightened so as to be pressed tightly, the rotation state of the gripping arm 8 is controlled by the elastic force of the spring material 101, and it is difficult to rotate downward in a substantially horizontal use state. For this reason, in the use state of the wheelchair 1, when traveling while pulling and guiding the wheelchair 1 by the gripping arm 8, when crossing the groove a or over the step b, the wheelchair 1 falls backward and the passenger It is possible to prevent an accident of falling to the front side.
When the gripping arm 8 is turned downward against the elastic force of the spring member 101, the gripping arm 8 is in a non-use state, so that the wheelchair 1 can be folded or stored.
[0017]
After attaching the attachment piece 81 of the gripping arm 8 to the support seat 95 in advance, the bracket mechanism 9 may be attached to the leg frame 7 by the first bracket 91 and the second bracket 92, or After attaching the first bracket 91 and the second bracket 92 to the leg frame 7, the mounting piece 81 may be rotatably provided on the support seat 95.
In addition, since the support hole 96 is formed as a female screw, the fixing bolt 98 is screwed doubly by the support hole 96 and the fixing nut 99, so that the fixing bolt 98 is not loosened. When the elastic force of the spring member 101 is insufficient, a plurality of spring members may be overlapped and fitted to the fixing bolt 98 to restrict the rotation of the gripping arm.
[0018]
In the second embodiment of the present invention shown in FIGS. 8 and 9, a stopper pin 102 is used as the restricting means 10 instead of the spring material 101.
That is, a string material 103 such as a chain or a thin string is connected to the stopper pin 102, hooked at an appropriate position on the wheelchair 1, and stored. A stopper hole 104 into which the stopper pin 102 can be inserted is formed at a position below the support hole 96 of the support seat 95.
The stopper pin 102 can be inserted into and removed from the stopper hole 104, and when the stopper pin 102 is inserted, the stopper pin 102 is engaged with one end of the groove 83 to fix the horizontal state of the gripping arm 8 (FIG. 9) When the stopper hole 104 is removed from the stopper pin 102, the gripping arm 8 can rotate within the range of the groove 83.
[0019]
Therefore, in a state where the bracket mechanism 9 is provided on the leg frame 7, the gripping arm 8 can rotate within the range of the groove 83 around the fixing bolt 98. It can be converted to a use state. In a horizontal use state, the stopper hole 104 is located at one lower end of the groove 83. When the stopper pin 102 is inserted into the stopper hole 104 in this state, the gripping arm 8 rotates downward. I can't. For this reason, in a state where the wheelchair 1 is used, when the vehicle is guided and guided by the gripping arm 8 while pulling the wheelchair 1, when crossing the groove a or over the step b, the wheelchair 1 falls backward and the occupant may It is possible to prevent an accident of falling to the front side.
When the stopper pin 102 is removed from the stopper hole 104 as in the above-described embodiment, the gripping arm 8 can be set in a non-use state, so that the wheelchair 1 can be folded and the gripping arm 8 can be obstructed. do not become.
[0021]
【The invention's effect】
In short, the present invention is applied to the outer surface of the leg frame provided on the front side of the traveling frame of the wheelchair body, and the first bracket is attached to one half, and is covered to the other half of the leg frame. A bracket mechanism having a second bracket to be attached is fixed to the leg frame, and a gripping arm that can be changed between a use state and a non-use state by an operation of a caregiver is provided on a front side of the wheelchair body. the the bracket mechanism provided with rotatably, characterized by comprising providing a regulating means for the gripping arms does not easily toward the unused state conversion from the use state to the bracket mechanism.
[0022]
Therefore, in the use state of the gripping arm, when the wheelchair is crossed or stepped over while the wheelchair is being advanced by pulling the gripping arm, the wheelchair body does not easily convert because the gripping arm is not easily converted, and the wheelchair body leans backward or turns forward. And the passenger can be safely moved. Also, since the gripping arm having the restricting means is simply attached to the leg frame provided on the front side of the traveling frame of the conventional wheelchair by the bracket mechanism , the structure is extremely simple and can be used as a part. It is very cheap and easy to buy for sick, elderly, disabled and the like.
[0023]
In addition, by using a spring material fitted on the pivot of the gripping arm as a regulating means, the gripping arm does not easily change from a used state to a non-used state without any operation. Is good and practical, and if a stopper pin is used as a restricting means, it can be securely fixed in use state, so that a dangerous accident such as a wheelchair falling backward can be reliably prevented, etc. It increases practical value.
[Brief description of the drawings]
FIG. 1 is a side view of a wheelchair.
FIG. 2 is a side view when a wheelchair crosses a groove.
FIG. 3 is a side view when a wheelchair climbs a step.
FIG. 4 is an exploded perspective view showing the first embodiment of the present invention.
FIG. 5 is a plan view with a part of the same being cut away.
FIG. 6 is a side view of the usage state of the above.
FIG. 7 is a side view of the above-mentioned unused state.
FIG. 8 is an exploded perspective view showing a second embodiment of the present invention.
FIG. 9 is a side view of the same use state.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 wheelchair 2 running frame 3 rear wheel 4 front wheel 5 seat frame 6 rear handle 7 leg frame 8 gripping arm 9 bracket mechanism 10 regulating means 81 mounting piece 82 through hole 83 groove 91 first bracket 92 second bracket 93 bolt 94 nut 95 support seat 96 support hole 97 stopper 98 fixing bolt 99 fixing nut 101 spring material 102 stopper pin 103 string material 104 stopper hole

Claims (4)

A first bracket applied to an outer surface of a leg frame provided on a front side of a traveling frame of a wheelchair body and attached to one half, and a second bracket attached to another half of the leg frame And a gripping arm, which can be switched between a use state and a non-use state by an operation of a caregiver, is attached to the front side of the wheelchair body by the bracket mechanism. Roll rotatably in provided with, characterized by comprising providing a regulating means for the gripping arms does not convert from the use state to the opposite readily unused state to the bracket mechanism. Gripping arm extends substantially horizontally to the front side of the wheelchair body in use, the wheelchair of claim 1 in the unused state is a state along the leg frame. 3. The wheelchair according to claim 2, wherein the restricting means is a spring material of a dish washer having a strong elastic force and a strong restoring force fitted on the pivot of the gripping arm. The wheelchair according to claim 1 or 2, wherein the restricting means is a stopper pin which is connected to a cord material, is stored by being hooked on a wheelchair, and is provided on a pivoting side of the gripping arm.

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