JP6913352B2 - Foot pedal brake device - Google Patents

Description

The present invention relates to a foot pedal brake device that controls a brake-equipped wheelchair in which the rotation of wheels can be stopped by, for example, a servo brake or a drum brake.

In conventional wheelchairs with servo brakes or wheelchairs with drum brakes, the wires are pulled by manually operating the operating lever provided on the brake handle, which activates the brakes and stops the wheels. It is common (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-176550

However, in the conventional wheelchair as in Patent Document 1, there are cases where the operation lever cannot be operated well by hand when the caregiver is old and weak or carries luggage. Further, with such an operation lever, it is difficult to keep the wheelchair parked while maintaining the braking state.

Therefore, an object of the present invention is to provide a foot pedal brake device that can be easily mounted on a wheelchair equipped with a conventional servo brake or drum brake later and can operate the brake with a foot. ..

The present invention is a foot pedal brake device attached to the wheelchair to stop the rotation of the wheels of a wheelchair with a brake having a brake lever piece by using the brake, the base member, and the brake of the wheelchair. A fixing portion fixed to the axle portion of the axle according to the above is provided at one end of the base member, and a foot pedal is pivotally supported at the other end of the base member, and further. The base member supports a brake lever piece contact member that displaces with respect to the base member as the foot pedal tilts, and the base member is fixed to the axle portion of the wheelchair. The brake lever piece contact member is detachably attached to the brake and is in contact with the brake lever piece that controls the brake, and when the foot pedal is tilted, the brake lever piece contact member is displaced. It is a foot pedal brake device characterized in that the brake lever piece is displaced.

In such a configuration, the base member has a structure in which the fixed portion and the foot pedal are combined, so that the structure is simplified, and the foot pedal brake is attached to a conventional wheelchair with the brake. The device can be easily attached later. Then, in a state where the foot pedal brake device is mounted on a wheelchair, the brake lever piece contact member is displaced by tilting the foot pedal with a foot, whereby the brake lever piece is displaced and the brake is released. Be controlled. Therefore, it is not necessary to operate the brake by hand, and even when the caregiver is weak, the foot pedal can be operated by simply stepping on the foot pedal, so that the burden on the caregiver can be significantly reduced. In addition, since the fixed portion is configured to be attached to the axle portion of the wheel related to the drum brake, each member can be compactly arranged with the foot pedal brake device mounted on the wheelchair. , A lean foot pedal brake structure can be realized.

The brake in the present invention includes a so-called servo brake, a so-called drum brake, and the like.

Further, the base member includes a first bearing portion and a second bearing portion that are separated from each other, and a shaft member that constitutes a tilting shaft of the foot pedal is provided between the first bearing portion and the second bearing portion. It is desirable that the foot pedal is tiltably supported between the first bearing portion and the second bearing portion while being handed over.

With such a configuration, the strength of the support structure of the foot pedal can be significantly improved, and sufficient strength can be ensured even when the foot pedal is mounted on a wheelchair and stepped on by a foot.

Since the foot pedal brake device of the present invention can be easily retrofitted to an existing wheelchair, there is an effect that unnecessary costs such as replacement of a new wheelchair are not incurred. In addition, when it is attached to a wheelchair, it has the effect of significantly reducing the operational burden on the caregiver.

It is a side view of the wheelchair equipped with the foot pedal brake device according to the Example. It is a partially enlarged explanatory view which shows the rear part of the wheelchair in which the foot pedal brake device is inactive. It is a partial cross-sectional view of a foot pedal brake device. It is a partial enlarged explanatory view which shows the cross section of the foot pedal brake device attached to a wheelchair. The side of the foot pedal brake device in the non-operating state is shown, (a) is a partially enlarged explanatory view, and (b) is a partially omitted enlarged explanatory view. The foot pedal brake device is in an inactive state, (a) is an explanatory view showing a state of being cut along the line AA in FIG. 4, and (b) is a view showing the state of being cut along the line BB in FIG. It is explanatory drawing which shows the state which was done. It is explanatory drawing which shows the state which is the foot pedal brake device which is in the non-operating state, and is cut by the CC line in FIG. It is a partially enlarged explanatory view which shows the rear part of the wheelchair in which the foot pedal brake device is activated. The side of the foot pedal brake device in the operating state is shown, (a) is a partially enlarged explanatory view, and (b) is a partially omitted enlarged explanatory view. The foot pedal brake device in the operating state, (a) is an explanatory view showing a state of being cut along the line AA in FIG. 4, and (b) is a view showing the state of being cut along the line BB in FIG. It is explanatory drawing which shows the state. It is explanatory drawing which shows the state which it is the foot pedal brake device which is in the operating state, and is cut by the CC line in FIG.

Hereinafter, an embodiment in which the foot pedal brake device of the present invention is applied to an existing wheelchair with a servo brake will be described in detail. The present invention is not limited to the examples shown below, and the design can be changed as appropriate.

First, the outline of the wheelchair 1 will be described.
As shown in FIG. 1, the wheelchair 1 includes a main body frame portion 10 made of a metal pipe. The main body frame portion 10 includes a pair of left and right side frames 10A and 10A, and the side frame 10A rises upward from the base frame portion 11 formed in the front-rear direction and the rear end portion of the base frame portion 11. The rear leg frame portion 12, the back frame portion 13 extending further upward from the upper end portion of the rear leg frame portion 12, and the upper frame portion extending forward and horizontally from the upper end portion of the rear leg frame portion 12. It has 15 and.

Further, the rear leg frame portion 12 is provided with an axle portion 3 that supports the axle of the rear wheel 2 as a wheel in the present invention. Further, a servo brake 4 is provided on the axle portion 3.

Further, from the servo brake 4, a plate piece-shaped servo brake lever piece 5 as a brake lever piece is projected toward the rear side. One end of the wire 6 is fixed to the tip of the servo brake lever piece 5. As the internal structure of the servo brake 4, a conventionally used one can be preferably adopted, and therefore detailed description thereof will be omitted.

Further, the front side X frame 21 and the rear side X frame 22 for connecting the left and right side frames 10A and 10A to each other are connected to the base frame portion 11. The front X frame 21 is composed of a pair of front X rods 19 and 19 rotatably supported by each other, and the rear X frame 22 is composed of a pair of rear X rods 20 rotatably supported by each other. , 20.

Further, a seat frame portion 23 extending in the front-rear direction is attached to the upper ends of the front side X rods 19 and 19 and the rear side X rods 20 and 20. When the wheelchair 1 is in use, the seat frame portion 23 is placed on the seat frame receiver 24 provided on the upper frame portion 15 and is supported from the lower side. With such a configuration, the wheelchair 1 can be folded.

Further, a front frame portion 25 is vertically extended to the front end portions of the base frame portion 11 and the upper frame portion 15, and casters 26 are attached to the lower ends of the front frame portion 25. A foot frame portion 27 is attached from the front frame portion 25 toward the front side, and a foot rest portion 28 is attached to the foot frame portion 27.

Further, the upper end portion of the back frame portion 13 is curved toward the rear side, and the curved portion operates the handle portion 30 that the caregiver grasps by hand when moving the wheelchair 1 and the servo brake 4. A brake lever 31 to which the other end of the wire 6 is fixed is attached.

Hereinafter, a main part of the present invention will be described.

As shown in FIG. 2, a foot pedal brake device 40 is retrofitted to the inner surface of the axle portion 3 (the surface opposite to the rear wheel 2) of the rear leg frame portion 12. More specifically, the foot pedal brake device 40 includes a plate-shaped base member 50, and a fixing portion 53 fixed to the axle portion 3 is formed at the front end portion (one end portion) of the base member 50.

Specifically, as shown in FIG. 3, the base member 50 is composed of a first base plate portion 51 and a second base plate portion 52 made of a pair of bent plate members. The front end portions of the first base plate portion 51 and the second base plate portion 52 are provided with recessed portion-shaped fixing portions 53 in which through holes 51A and 52A are formed, respectively. Then, as shown in FIG. 4, the fixing bolts 33 that serve as axles are inserted into the through holes 51A and 52A of the fixing portions 53, so that the fixing portions 53 are fitted onto the axle portions 3 and come into surface contact with each other to be fixed to each other. Has been done.

On the other hand, as shown in FIG. 3, the rear end portion (the other end portion) of the base member 50 is along the plate thickness direction (left-right direction of the wheelchair 1) of the first base plate portion 51 and the second base plate portion 52. A first bearing portion 54 and a second bearing portion 55 are formed so as to be separated from each other and face each other. A tilting shaft pin 56 as a shaft member constituting the tilting shaft is passed between the first bearing portion 54 and the second bearing portion 55, and the pedal member 60 (FIG. 2) is provided by such a bearing structure. See) is supported. Specifically, the lower end portion (one end portion) of the pedal member 60 is tiltably attached to the tilting shaft pin 56.

Further, the details of the pedal member 60 and the link mechanism around the pedal member 60 will be described.
As shown in FIGS. 3 to 7 and the like, the pedal member 60 is formed by stacking a first pedal portion 61 and a second pedal portion 62, both of which are made of a plate material bent into a substantially L shape. Then, at the lower end of the pedal member 60, a side view as shown in FIGS. A link member 70 having a substantially "<" shape is interposed. The upper end portion (one end portion) of the link member 70 is pivotally supported by the pedal member 60 (first pedal portion 61 and second pedal portion 62) via the first link pin 71.

Further, as shown in FIGS. 2, 3 and 5 (b), a brake lever single contact member 80 made of a substantially U-shaped member is used for the contact member in the first bearing portion 54 and the second bearing portion 55. It is pivotally supported via a shaft pin 81. Specifically, the brake lever single contact member 80 is arranged so as to open upward and cover the outside of the first bearing portion 54 and the second bearing portion 55. Further, a second link pin 72 is delivered to the brake lever single contact member 80 along the left-right direction of the wheelchair 1.

Then, as shown in FIGS. 6 and 7, the lower end portion (the other end portion) of the link member 70 described above is pivotally supported by the second link pin 72.

Further, as shown in FIG. 3, a protruding portion 85 projecting toward the rear wheel 2 is provided on the side surface portion of the brake lever single contact member 80 facing the rear wheel 2 side. Further, an adjusting bolt 86 is screwed to the protrusion 85.

Then, as shown in FIGS. 4 and 5A, when the foot pedal brake device 40 is fixed to the axle portion 3, the head of the adjustment bolt 86 is the servo brake lever piece 5 of the servo brake 4. It is in contact with the tip from below.

Further, as shown in FIG. 5 and the like, the upper end portion (the other end portion) of the pedal member 60, in which the first pedal portion 61 and the second pedal portion 62 are laminated in the vertical direction, is made of synthetic resin. The foot pedal 64 is configured by being covered with the cover 65 of the above. The foot pedal 64 is usually urged by a coil spring (not shown) which is an elastic member in a direction in which the foot pedal 64 is in a substantially horizontal position.

Next, the operation mode of the foot pedal brake device 40 will be described.

As shown in FIGS. 1 to 7, in the non-operating state α in which the foot pedal 64 of the foot pedal braking device 40 is in a substantially horizontal position, the head of the adjusting bolt 86 attached to the brake lever single contact member 80 The portion is only in contact with the tip portion of the servo brake lever piece 5 from below. In such a state, the servo brake lever piece 5 is not operated and the servo brake 4 does not operate, so that the rear wheel 2 is rotatable.

Further, as shown in FIG. 7, at this time, the first edge portion 66 facing the front side of the pedal member 60 comes into contact with the shaft pin 81 for the contact member. Therefore, the tilting range of the foot pedal 64 is restricted, and the foot pedal 64 is prevented from tilting excessively forward beyond the substantially horizontal state.

On the other hand, as shown in FIGS. 8 to 11, when the foot pedal 64 of the foot pedal braking device 40 is stepped on by the foot and the operating state β is tilted rearward from a substantially horizontal position, the brake lever is passed through the link member 70. The one-side contact member 80 is displaced, and the adjustment bolt 86 moves upward accordingly. Then, the tip of the servo brake lever piece 5 that was in contact with the adjusting bolt 86 is pushed upward and displaced. When the tip of the servo brake lever piece 5 is displaced upward in this way, the servo brake 4 is activated and the rotation of the rear wheel 2 is stopped. Further, the foot pedal 64 is maintained in this tilted position by the toggle mechanism of the pedal member 60 in such a tilted state, and functions as a parking brake.

Further, as shown in FIG. 11, at this time, a second edge portion 67 different from the first edge portion 66 facing the front side of the pedal member 60 comes into contact with the contact member shaft pin 81. Therefore, it is possible to prevent the foot pedal 64 from being excessively tilted to the rear side.

When the foot pedal brake device 40 is in the operating state β, the servo brake lever piece 5 is not displaced by the traction of the wire 6 even if the brake lever 31 is operated. Therefore, it is impossible to put the servo brake 4 into the non-operating state α by operating the brake lever 31. On the contrary, it is possible to put the servo brake 4 into the operating state and then put the foot pedal brake device 40 into the operating state β by operating the brake lever 31. At this time, once the foot pedal brake device 40 is in the operating state β, the servo brake 4 is in the operating state β regardless of the operation of the brake lever 31, and the rotation of the rear wheel 2 is stopped.

In order to shift the foot pedal brake device 40 from the non-operating state α to the operating state β, the rear side (caregiver side) of the foot pedal 64 may be depressed and tilted. Further, in order to shift from the operating state β to the non-operating state α, the front side of the foot pedal 64 may be depressed. Then, the foot pedal 64 of the pedal member 60 is urged by an elastic member (coil spring) (not shown) so as to be in a substantially horizontal position, and is easily put into the non-operating state α.

Since the foot pedal brake device 40 described above has a structure in which the fixing portion 53 and the foot pedal 64 are combined with one base member 50, the entire structure is compact and can be easily retrofitted.

Further, a tilting shaft pin 56 for supporting the foot pedal 64 is passed between the first bearing portion 54 and the second bearing portion 55 of the base member 50, and the first bearing portion 54 and the second bearing portion 55 Since the pedal member 60 is pivotally supported between the pedal members 60, the support structure of the foot pedal 64 is strengthened.

The dimensions and shape of each part can be freely selected as appropriate. The material used is not particularly limited, but it is desirable that a metal material is used for the portion other than the cover 65 in the foot pedal brake device 40 from the viewpoint of ensuring strength.

1 Wheelchair 2 Rear wheel 3 Axle 4 Servo brake 5 Servo brake lever piece (brake lever piece)
6 Wire 10 Main body frame part 10A Side frame part 11 Base frame part 12 Rear leg frame part 13 Back frame part 15 Upper frame part 19 Front side X 杆 20 Rear side X 杆 21 Front side X frame 22 Rear side X frame 23 Seat frame part 24 Seat Frame receiver 25 Front frame part 26 Caster 27 Foot frame part 28 Foot rest part 30 Handle part 31 Brake lever 33 Fixing bolt 40 Foot pedal Brake device 50 Base member 51 First base plate part 52 Second base plate part 53 Fixing part 54 First Axle bearing 55 Second axle bearing 56 Tilt shaft pin (shaft member)
60 Pedal member 61 1st pedal part 62 2nd pedal part 64 Foot pedal
65 Cover 66 1st edge 67 2nd edge 70 Link member 71 1st link pin 72 2nd link pin 80 Brake lever single contact member 81 Shaft pin for contact member 85 Protruding part 86 Adjusting bolt α Non-operating state β Operating state

Claims (2)

A foot pedal brake device attached to a wheelchair with a brake having a brake lever piece to stop the rotation of the wheels of the wheelchair using the brake.
Equipped with one base member
Fixing portion fixed to an axle portion of the axle according to the brake of the wheelchair is provided at one end of the one base member,
A foot pedal is pivotally supported at the other end of the one base member and is tiltably supported.
Further, the one base member supports a brake lever single contact member that displaces with respect to the base member as the foot pedal tilts.
With the one base member fixed to the axle of the wheelchair,
The brake lever piece contact member is in contact with the brake lever piece that is displaceably attached to the brake and controls the brake.
A foot pedal brake device, characterized in that when the foot pedal is tilted, the brake lever piece contact member is displaced and the brake lever piece is displaced. The base member includes a first bearing portion and a second bearing portion that are separated from each other.
A shaft member constituting the tilting shaft of the foot pedal is passed between the first bearing portion and the second bearing portion, and the first bearing portion and the second bearing portion are separated from each other. The foot pedal braking device according to claim 1, wherein the foot pedal is supported so as to be tiltable.

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