JP4098823B2 - Walker - Google Patents

Description

The present invention relates to a walker that is used for assisting or training walking in hospitals and homes by persons with injured legs and weak elderly legs.

Conventionally, such a walker is placed in a U-shaped frame with casters and moves forward while supporting the body, or is supported by a quadruped frame without casters, and when moving forward, it is lifted and carried forward. There are things that move forward alternately left and right. In particular, in the case of having a caster, there is a fear that the vehicle may fall over and roll on a slope, and Patent Document 1 discloses a device provided with a fall prevention mechanism to prevent such an accident. However, this walker has only a fall prevention mechanism and does not have a mechanism for moving the walker forward.
Japanese Patent Publication No. 3-25178

The present invention is a walker with casters, and can always run freely with casters, but when a load of a predetermined amount or more is applied, the grounding foot that regulates running protrudes and stably stops the walker. Then, when waking up trying to move forward, it aims at providing a walker in which the walker itself self-propels for a certain distance and assists in running.

In order to solve the above problems, the first invention is an elastic connecting means for connecting the U-shaped upper frame 3 and the cart frame 4 having casters when viewed from above the front surface having the grip portion 2 and the grounding foot 6. And the grounding foot 6 moves down when the upper frame 3 is loaded with a predetermined load or more, and the elastic coupling means is provided on the carriage frame 4. The grounding foot 6 inserted into the vertical pipe 5 and having the upper end side inserted and locked to the lower end connecting portion 11 of the upper frame 3, and wound around the grounding foot 6, and connected to the vertical pipe 5 and the lower end. The spring 7 sandwiched between the ends of the portion 11, the shaft gear 14 provided on the support shaft of the rear wheel 9 of the caster, and the outer surface of the grounding side end of the grounding foot 6 elastically projecting for upward movement of該接Chiashi 6 only as engaged with the shaft gear 14 provided by A walker consisting of rack 13 that comprises gear teeth formed on the orientation.

Further, in the first invention, the rack 13 is accompanied by a downward movement of the grounding foot 6 against the urging force of the winding spring 7 when a load of a predetermined level or more is applied to the upper frame 3. However, when the load is released after the caster is grounded to the floor without rotating the caster, the urging force of the winding spring 7 moves the grounding foot 6 upward. The rack 13 and the shaft gear 14 that are integrally associated with the upward movement are elastically meshed with each other so that the casters are rotated forward and the casters are allowed to self-propell for a certain distance .

In the second invention , the elastic engagement between the rack 13 and the shaft gear 14 is applied to the rack 13 by a leaf spring 15 from a longitudinal notch groove on the outer peripheral surface of the grounding end of the grounding foot 6. The walker according to the first aspect of the present invention , wherein the walker is performed by urging it toward the shaft gear 14.

With the walker according to the present invention configured as described above, the four legs of the walker can be used with the upper frame and the cart even when the walker is intentionally entrusted with weight or when the weight is staggered and the weight is unexpectedly applied. While resisting the restoring force of the elastic body interposed between the frames, the pedestrian is stably fixed to the road surface by touching the floor and stopping the carriage. Next, when the weight held in the walker is returned to itself while holding the left and right frames, the upper frame floats due to the restoring force of the elastic body, and the grounding foot integrated with the upper frame separates from the floor surface. The restoring force of the elastic body is transmitted to the rear wheel of the carriage to advance the carriage for a certain distance. Therefore, it is not necessary for the handicapped user to move the walker forward.

In addition, when the walker is advanced by itself, the rear wheel's shaft gear repels the elastically actuated rack teeth provided on the grounding foot, and it is difficult to run out of control due to the low inertia of the resistance. When the walker is moving backward, the rear wheel shaft gear meshes with the rack of the grounding foot, and the gradual braking that gradually grounds the grounding foot to the floor while compressing the elastic spring is applied. Increases safety when you are about to fall.

When a U-shaped upper frame 3 having a gripping part 2 and a grounding foot 6 is viewed from above and a cart frame 4 having casters are connected by an elastic connecting means, and a load exceeding a predetermined value is applied to the upper frame 3. The grounding foot 6 is moved down to be grounded, and when the load is released after the grounding, the walker is self-propelled for a certain distance.

A preferred embodiment of the present invention will be described below with reference to the drawings. Rollator 1 of the present invention is a walker for advancing while supporting the body to put the body into casters U-shaped pipe frame as shown in FIG. 1, U-shaped when viewed from upper front side having a grip portion 2 The upper frame 3 of the mold moves up and down via four grounding feet 6 inserted through the vertical pipes 5 of the substantially identical U-shaped carriage frame 4 and a winding spring 7 wound around the grounding foot 6. It is supported freely. Further, the U-shaped carriage frame 4 is provided with three casters that are always in contact with the ground. These casters are provided at two rear wheels 9 provided at symmetrical positions on both sides of the carriage frame, and at the top of the tip. It consists of a single front wheel 8 and stably grounds as a tricycle to maintain traveling. Further, the four grounding feet 6 are distributed on both sides in the vicinity of the front wheel 8 and are inserted into the two front feet 6 inserted into the provided vertical pipes 5 and the vertical pipe 5 provided adjacent to the rear of the rear wheel 9. The grounding feet 6 are inserted into the four vertical pipes 5 of the carriage frame and are slidable.

Further, a non-slip rubber or resin stone protrusion 10 is fitted to the tip of the grounding side of the four grounding feet 6, and the other end side is inserted into the lower end connecting portion 11 of the upper frame 3 and has a height. The adjustment pin 12 is inserted and fixed to the lower end connecting portion 11 of the upper frame 3. Further, a winding spring 7 wound around the grounding foot 6 is sandwiched between ends of a lower end connecting portion 11 of the upper frame and a vertical pipe 5 of the carriage frame, and elastically supports the upper frame 3 on the carriage frame 4. Acts as an elastic body. Therefore, when a load exceeding a predetermined value is not applied to the upper frame 3, the grounding foot 6 is lifted from the ground as shown in FIG. 2, and when a load exceeding a predetermined value is applied, 3, the upper frame 3 moves downward against the winding spring 7, so that the integral grounding foot 6 also moves downward and contacts the ground. In addition, the height adjustment of the grounding foot 6 is performed in a state in which a plurality of locking holes with a predetermined interval are provided in the upper portion of the grounding foot 6 and aligned with the holes 11a provided in the lower end connecting portion 11 of the upper frame 3 at the same interval. The height is determined, and the height adjusting pin 12 is inserted to fix the grounding foot 6 to the lower end connecting portion 11 of the upper frame 3.

The rear wheel 9 is a double wheel as shown in FIGS. 3 and 4, and the grounding foot 6 is arranged between the two wheels and is provided between the rack 13 and the rotating shaft of the rear wheel 9. And the shaft gear 14 provided in the gears are meshed with each other. That is, the rack 13 is urged by the leaf spring 15 from the vertically cutout groove of the grounding foot 6 and faces the shaft gear 14. The teeth of the rack 13 are provided upward so as to get over the shaft gear 14 when the grounding foot 6 moves downward, and to engage when the grounding foot 6 moves upward, and the urging force of the leaf spring 15 also acts as such. It is set as follows.

Further, a stopper 16 is attached to the upper part of the grounding foot 6 on the front side so as to adjust the self-propelled distance of the walker and prevent it from coming off the cart frame 4. By striking the lower end of the vertical pipe 5 and preventing the upper frame 3 from rising further, the rack 13 of the rear wheel 9 is prevented from being disengaged from the shaft gear 14 and the rotation of the rear wheel 9 is stopped. Thus, by arbitrarily changing the position of the stopper 16 on the grounding foot 6, it is possible to change the reach of the self-propelled forward according to the leg strength of the user.

When advancing with a walker now, all the grounding feet 6 remain floating from the floor surface when the gripping part 2 of the upper frame 3 is gripped or the elbow is put on lightly. Since 9 is grounded, it can move forward stably while pushing lightly. At this time, the shaft gear 14 of the rear wheel 9 travels while flipping the rack 13, and therefore travel with resistance correspondingly. When retreating, the shaft gear 14 engages with the rack 13 and operates to lower the rear grounding foot 6. At this time, the winding spring 7 is gradually compressed, and the rear wheel 9 stops when the rear foot 6 comes in contact with the floor surface by gradually increasing the braking force as it moves backward.

If the user wants to stop on the spot, it is performed by the user losing his / her weight through the grip portion 2 of the walker 1. When the body weight is applied, the grounding foot 6 is lowered integrally with the upper frame 3 against the winding spring 7, and the grounding foot 6 is lowered to the floor surface while the rack 13 is being repelled by the shaft gear 14 of the rear wheel 9. The four grounding feet 6 are grounded to stably fix the walker on the road surface. From the state where the walker is stopped, the user can safely put his / her weight on the walker 1 and carry his / her foot forward.

Next, when the weight of the walker 1 is returned to the user himself / herself while maintaining the balance of the body while holding the grasping portion 2 while carrying his / her foot forward, the four grounding feet 6 are wound by the spring 7. By the restoring force of the vehicle, the vehicle tries to return to a state where it can travel away from the floor surface with less load. At that time, the rack 13 provided on the rear foot 6 meshes with the shaft gear 14 provided on the rear wheel 9 and rotates the rear wheel 9 as the rear foot 6 rises, and the stopper 16 provided on the front foot 6 is provided with the vertical pipe 5. The walker 1 is advanced until it hits the lower end of the walker. Here, if you put your weight in the walker 1 and repeat the same thing, you can go to the walker 1 and move forward steadily with the walker 1 just by stopping the foot with the walker 1 it can. (Fig.5, Fig.6)

Further, the walker 1 has a structure in which the grounding foot 6 is grounded to the floor when the weight is applied when it is not used for walking or when it is used as a wheelbarrow. By passing the seat cushion, the grip 2 can be used as a stable chair with four support points instead of an integrated backrest and armrest. Moreover, when the chair stands up, the chair is automatically pulled backward from the above-mentioned principle.

In addition, even if a luggage basket is passed to the left and right sides of the carriage frame 4 and used, even if a heavy load is applied to the carriage frame 4, the grounding foot 6 will not touch the floor surface. You can also

In addition, the grip 2 of the upper frame 3 is formed in two steps as shown in FIG. 2, but the upper portion is used when the user holds the forearm with the forearm or when the walker 1 is used as a chair. Assuming the role of the backrest and armrest, the lower tier is assumed to be gripped when the user holds the upper tier aside or when standing up from the bed, and the middle curved portion is Each is designed on the assumption that it will be grasped when the walker 1 is used as a wheelbarrow.

It is a perspective view of the present invention, a walker. FIG. 2 is a state diagram in which a foot is lifted in the front view of FIG. 1. FIG. 2 is a state diagram in which a foot is grounded in the front view of FIG. 1. It is a right view of FIG. It is a principal part expanded sectional view of the rear-wheel which shows the state which the leg | ground contacted. It is a principal part expanded sectional view of the rear wheel which shows the state where the leg | float floated.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Walker 2 Grasp part 3 Upper frame 4 Bogie frame 5 Vertical pipe 6 of bogie frame Grounding foot 7 Winding spring 8 Front wheel 9 Rear wheel 10 Stone protrusion 11 Lower end connection part 12 Height adjustment pin 13 Rack 14 Shaft gear 15 Leaf spring 16 Stopper

Claims (2)

The U-shaped upper frame (3) and the carriage frame (4) having casters are connected by an elastic connecting means when viewed from above the front surface having the grip portion (2) and the grounding foot (6), A walker in which the grounding foot (6) moves down and contacts the upper frame (3) when a load greater than a predetermined value is applied to the upper frame (3), wherein the elastic connecting means includes the cart frame (4). The grounding foot (6) is inserted into the vertical pipe (5) and the upper end is inserted and locked to the lower end connecting portion (11) of the upper frame (3), and wound on the grounding foot (6). A winding spring (7) sandwiched between the ends of the vertical pipe (5) and the lower end connecting portion (11), and a shaft gear provided on the support shaft of the rear wheel (9) of the caster ( and 14), the upward movement of the resiliently was flared to the ground-side end outer peripheral surface provided with 該接Chiashi the floor contact foot (6) (6) If only it from the rack (13) comprising said shaft gear (14) and upwardly formed gear teeth as meshes, the upper frame (3) load equal to or greater than a predetermined in the stake in the ground leg (6) is the It moves downward against the urging force of the coil spring (7), without rotating the caster by overcome not engaged and the rack associated with the integral (13) said shaft gear (14) on its downward When the load is released after grounding on the floor surface, the urging force of the winding spring (7) moves the grounding foot (6) upward, and the rack (13) and the unit accompanying the upward movement are integrated with the rack (13). A walker which rotates the caster forward by elastically meshing with a shaft gear (14) so as to be self-propelled for a certain distance. The elastic meshing between the rack (13) and the shaft gear (14) causes the rack (13) to come out of a longitudinal notch groove on the outer peripheral surface of the grounding side end of the grounding foot (6) from a leaf spring (15 The walker according to claim 1, wherein the walker is made by urging the shaft gear (14) toward the shaft gear (14).