JP4652266B2 - Walking assistance vehicle - Google Patents

Description

  The present invention relates to a walking assistance vehicle used as a support when, for example, an elderly person walks.

As a conventional walking assistance vehicle, a seat frame is attached to a chair body frame having a front leg portion and a rear leg portion so that the seat frame can be flipped up, and when the seat frame is flipped up, the front leg portion and the rear leg portion are A foldable configuration is provided.
In the foldable walking assist vehicle, as shown in FIG. 10, in order to lock the unexpected jumping of the seat plate 1A, a swing rod 13A is attached to the lower side of the seat plate 1A so as to be pivotable up and down. A configuration is provided in which the notches 18A and 20A of the plate-like body 19A attached to 13A are engaged with a protrusion 17A provided on the chair body frame (see, for example, Patent Document 1).

No. 7-17305

  In the above configuration, the seat plate 1A can be flipped up by lifting the swinging rod 13A to release the engagement between the notch 20A of the plate-like body 19A and the projection 17A on the chair body frame side.

  In the above-described conventional configuration, it is necessary to provide a margin for pulling up the swinging rod 13A below the seat plate 1A, and the swinging rod 13A is in a state of being separated from the lower surface of the seat plate 1A. Depending on the situation, the swinging rod 13A rotates upward and the seat plate 1A is unlocked, which is extremely dangerous.

As a means for solving the above-mentioned conventional problems, the present invention has a structure in which a seat frame 7 is attached to a chair body frame 1 having wheels 35 and 36 attached to front, rear, left and right so that the chair body can be flipped up. A locking pin 30 is attached to the frame 1 side, and a locking piece 26 formed at the rear end of an engagement recess 31 that engages with the locking pin 30 is slidable back and forth on the lower side of the seat frame 7. The locking piece 26 is urged rearward by a spring S so that the engaging recess 31 engages with the locking pin 30 of the chair body frame 1, and further forward from the locking piece 26. The lever 32 is fed out, the lever 32 is disposed along the lower side of the seat frame 7, and the engaging recess 31 of the locking piece 26 engages with the locking pin 30 of the chair body frame 1. In the state where the flip-up of the seat frame 7 is locked, the front end thereof is set so as not to substantially protrude from the front edge of the seat frame 7 There is provided a walking assist vehicle that is.
The chair body frame 1 includes a front leg portion 4 and a rear leg portion 5, and the front leg portion 4 and the rear leg portion 5 are preferably foldable in a state where the seat frame 7 is flipped up. The chair body frame 1 includes a pair of left and right main frames 2 each composed of a back frame 3 and a front leg portion 4 bent forward and downward from the lower end of the back frame 3, and the front leg portion 4 of the main frame 2 on the upper portion of the main frame 2 from the front to the rear. And a rear leg portion 5 that is pivotably attached to the front leg portion 4 via a pivot shaft 6 that is located at the intersection point. The lower end of the front leg portion 4 of the main frame 2 and the rear portion A pair of left and right wheels 35, 36 are rotatably attached to the lower end of the leg 5, and the seat frame 7 is rearwardly mounted on the lower part of the back frame 3 of the pair of left and right main frames 2 of the chair body frame 1. It is attached to the chair body frame 1 so that it can be flipped up by passing the end in a rotatable manner. A link rod 24 is passed between the rear leg 5 and the upper end of the rear leg 5, and a receiving part 25 for receiving the side part of the seat frame 7 is provided at the upper end of the rear leg 5. The locking pin 30 is extended from the receiving portion 25, while the locking piece 26 is attached to the lower side of the seat frame 7 so as to be slidable in a pair of left and right directions, and the lever 32 is connected to the pair of left and right sides. When the seat frame 7 is flipped up, the rear leg 5 is folded to the front leg 4 side of the main frame 2 via the link rod 24. It is desirable that

[Action]
When the walking auxiliary vehicle W is used, the locking piece 26 of the seat frame 7 is engaged with the locking pin 30 on the chair body frame 1 side, and the jumping up of the seat frame 7 is locked. The lever 32 of the locking piece 26 is attached to the lower side of the seat frame 7, but when the lock is released, the locking piece 26 slides forward when the lever 32 is pulled forward. To do.
Thus, since the lever 32 is attached so as to slide back and forth, it can be attached along the lower side of the seat frame 7 so as not to be separated from the seat frame 7. Further, since the lever 32 is set so that its front end does not protrude from the front edge of the seat frame 7 in the locked state, the lever 32 is not pulled forward by an unexpected situation.

When the chair body frame 1 includes a front leg portion 4 and a rear leg portion 5 and the front leg portion 4 and the rear leg portion 5 can be folded with the seat frame 7 flipped up, Can be folded compactly.
The chair body frame 1 includes a pair of left and right main frames 2 including a back frame 3 and a front leg portion 4 bent forward and downward from a lower end of the back frame 3, and an upper portion of the front leg portion 4 of the main frame 2 from the front to the rear. It consists of a rear leg part 5 that is pivotably attached to the front leg part 4 via a pivot shaft 6 that intersects with the front leg part 4 via the pivot shaft 6, and has a lower end of the front leg part 4 of the main frame 2 and the rear leg part. A pair of left and right wheels 35, 36 are rotatably attached to the lower end of the portion 5, and the seat frame 7 has a rear end at the lower part of the back frame 3 of the pair of left and right main frames 2 of the chair body frame 1. Is pivotably attached to the chair body frame 1 so that it can be flipped up, and a link rod 24 is provided between the middle of both sides of the seat frame 7 and the upper end of the rear leg 5. A receiving portion 25 for receiving the side portion of the seat frame 7 is provided at the upper end of the rear leg portion 5. The locking pin 30 is extended from the portion 25, while the locking piece 26 is attached to the lower side of the seat frame 7 so as to be slidable in a pair of left and right directions, and the lever 32 is connected to the pair of left and right locking pieces 26. When the seat frame 7 is flipped up, the rear leg portion 5 is drawn toward the front leg portion 4 side of the main frame 2 through the link rod 24 and folded.

〔effect〕
Therefore, in the present invention, the seat frame is reliably prevented from jumping up due to an unexpected situation, so that even an elderly person can safely use it as a handcart.

The present invention will be described in detail below with reference to an embodiment shown in FIGS.
In FIG. 1, reference numeral 1 denotes a chair body frame of the walking assistance vehicle W, and the chair body frame 1 is a pair of left and right main frames 2, 2 and a rear leg rotatably attached to the main frames 2, 2. Part 5.

  The main frame 2 includes a back frame 3 and a front leg portion 4 bent forward and downward from the lower end of the back frame 3, and the rear leg portion 5 extends from the front to the rear on the upper portion of the front leg 4 of the main frame 2. It is attached to the front leg portion 4 so as to be rotatable via a rotation shaft 6 located at the intersection.

  The root end of the seat frame 7 is pivotally attached to the lower part of the backrest frame 3 of the pair of left and right main frames 2, 2 of the chair body frame 1 through the pivot shaft bracket 8, and thus the seat frame. 7 is attached to the chair body frame 1 so that it can be flipped up.

A back case 9 is passed to the upper ends of a pair of left and right backrest frames 3 of the main frame 2, but handles 10 and 10 are extended from the upper left and right side surfaces of the back case 9, and from the lower part. The brake levers 11 and 11 of the brake mechanism accommodated in the back case 9 are fed out through the vertically long holes 11A and 11A.
Further, a pair of left and right outer cylinders 12, 12 are extended downward from the lower end of the back case 9, and the outer cylinders 12, 12 are fitted to the back frame 3 of the main frame 2 so as to be slidable vertically. Has been.

  A transverse beam 13 is passed between the pair of left and right outer cylinders 12, 12. As shown in FIG. 2, a pair of left and right pin support cylinders 14, 14 are attached to the transverse beam 13 via brackets 15, 15. Are attached, and pins 16 and 16 project from the tip ends of the pin support cylinders 14 and 14, respectively. The pin support cylinders 14 and 14 are provided between the left and right pin support cylinders 14 and 14, respectively. Coil springs 17 that bias the left and right outer cylinders 12 and 12 (outside) are interposed, and a lever 18 is inserted into the pin support cylinders 14 and 14.

  The pins 16 and 16 of the pin support cylinders 14 and 14 are fitted into any one of a plurality of through holes 20 provided in the backrest frame 3 through the through holes 19 of one outer cylinder 12 and 12. Is done. Therefore, if the pins 16 and 16 are pulled out from any of the through holes 20 of the backrest frame 3 by sliding the pin support cylinders 14 and 14 inward through the lever 18, the outside of the back case 9 is removed. The cylinders 12 and 12 can be slid up and down with respect to the back frame 3 and 3. After adjusting the height of the desired back case 9, the levers 18 of the pin support cylinders 14 and 14 can be freely released. The pins 16 and 16 of the support cylinders 14 and 14 are fitted into the predetermined through holes 20 of the backrest frames 3 and 3 by the urging force of the coil spring 17, and thus the back case 9 is fixed at a desired height.

  Cross beams 21 and 22 are respectively passed to the lower portions of the pair of left and right backrest frames 3 and 3 of the main frame 2 and the upper ends of the front leg portions 4 and 4. Is passed. Link rods 24 are passed between the middle of both sides of the seat frame 7 and the upper end of the rear leg 5, and the side of the seat frame 7 is disposed at the upper end of the rear leg 5. Receiving portions 25 and 25 are provided for receiving the.

  Reference numeral 26 shown in FIGS. 3 and 4 denotes a locking piece disposed on the lower side of the seat frame 7, and a horizontally long guide hole 27 is provided in the front upper portion of the locking piece 26. A guide pin 29 that is slidably fitted to the bracket 28 on the side of the seat frame 7 is slidably fitted, and a locking pin that protrudes from the receiving portion 25 on the rear edge of the locking piece 26. An engagement recess 31 to which 30 is engaged is formed.

Further, a U-shaped lever 32 is projected forward from the pair of left and right locking pieces 26, and the side portion of the lever 32 slides back and forth on the guide tube 33 that is fed out from the side portion of the seat frame 7. It is penetrated and supported as possible.
Further, a guide piece 34 for guiding the lever 32 is attached below the front edge of the seat frame 7.

  A pair of left and right front wheels 35, 35 are attached to the lower ends of the pair of left and right front legs 4 of the main frame 2 so as to be able to rotate left and right. Rear wheels 36 are fixedly attached, and a lateral beam 37 is provided at the lower ends of the left and right rear leg portions 5.

  As shown in FIGS. 5 and 6, a fixed cylinder 38 is attached to the lower ends of the pair of left and right front legs 4 of the main frame 2, and a lock lever 40 is moved forward from a lower end flange 39 of the fixed cylinder 38. A wheel support block 41 is disposed below the lower end flange 39 of the fixed cylinder 38, and the wheel support block 41 rotates in the left-right direction with respect to the front leg portion 4 of the main frame 2 and the fixed cylinder 38. An annular ring 42 that overlaps the lower end flange 39 of the fixed cylinder 38 is disposed on the upper surface, and the annular ring 42 is rotatable relative to the fixed cylinder 38 and the wheel support block 41. A selection lever 43 is provided rearward from the ring 42. From both side surfaces of the wheel support block 41, axles 44, 44 of the front wheels 35, 35 are fed out.

A front end bearing 45 of the wheel support block 41 supports a root end of a lock block 46 having a lock recess 47 on the front face so as to be able to rotate 180 °, and handles 48, 48 are provided on both sides of the lock block 46. A coil spring 49 is passed between one of the grips 48 and the wheel support block 41.
Further, a lock block 51 provided with an engaging recess 52 at the upper end is supported on the rear bearing 50 of the wheel support block 41 so as to be rotatable by 90 °. Handles 59, 59 project from both side surfaces of the lock block 51, and a coil spring 60 is passed between one of the handles 59 and the wheel support block 41.

  In the above configuration, as shown in FIG. 7, the lock block 46 on the front surface of the wheel support block 41 is rotated 180 ° upward from the vertical state to the upright state. The lower end flange 39 is attached to the lock lever 40. If the inner width of the lock concave portion 47 of the lock block 46 and the width of the lock lever 40 are set to be substantially the same, the fixed cylinder 38, that is, the front leg portion 4 of the main frame 2 is interposed via the lock lever 40. Relative rotation with the wheel support block 41 is prevented. In this state, the front wheels 35 and 35 are straight forward, and the walking assistance vehicle W goes straight ahead. The lock block 46 is elastically fixed in a suspended state and a raised state by a coil spring 49.

  Further, as shown in FIG. 8, the lock block 51 on the rear surface of the wheel support block 41 is rotated 90 ° upward, and the engagement recess 52 of the lock block 51 is engaged with the selection lever 43 of the ring 42. In this state, the relative rotation between the wheel support block 41 and the ring 42 is fixed. The lock block 51 is elastically fixed by the coil spring 60 in a suspended state and a horizontal state. Therefore, a coil spring 53 is passed between the selection lever 43 and the fixed cylinder 38 of the front leg portion 4 so that the wheel support block 41 is straightly forwarded through the selection lever 43, that is, the front wheels 35 and 35 are straight forward. If the assisting vehicle W is curved, the front wheels 35 and 35 are energized so as to be straight forward immediately after the curve. You can walk stably and safely. As shown in FIGS. 5 and 6, when neither the lock lever 40 of the fixed cylinder 38 nor the selection lever 43 of the annular ring 42 of the wheel support block 41 is locked by the lock blocks 46, 51, the wheel support is supported. The block 41 freely rotates with respect to the front leg portion 4 of the main frame 2.

A seat plate 54 is mounted on the seat frame 7 of the walking assist vehicle W so as to be able to be flipped up, and a waistrest seat 55 is passed under the back frames 3 and 3 of the pair of left and right main frames 2 and 2. .
Further, a storage bag (not shown) may be attached to the lower side of the seat frame 7, and in this case, the seat plate 54 functions as a lid of the storage bag. When an elderly person gets tired of walking, he can sit on the seat plate 54 and take a break.

  A pair of left and right operation wires 56 and 56 are connected to the brake levers 11 and 11 to the brake pieces 57 and 57 of the rear wheels 36 and 36. When the brake levers 11 and 11 are pulled upward, the brake piece 57 , 57 are pressed against the rear wheels 36, 36 via the operation wires 56, 56 and brakes are applied. The brake pieces 57 are urged in the brake release direction by a coil spring 58.

  When the walking auxiliary vehicle W is folded, from the locked state shown in FIG. 3, if the lever 32 is pulled forward as shown in FIG. 4, the locking piece 26 moves forward, and the engaging recess 31, the locking pin 30, Is released (unlocked). When the seat frame 7 is flipped up as shown by the arrows in FIG. 4, the rear leg portion 5 is drawn toward the front leg portion 4 side of the main frame 2 through the ring rod 24, and the folded state as shown in FIG. .

  In the walking assistance vehicle of the present invention, the seat frame does not suddenly jump up due to unforeseen circumstances, and even an elderly person can use it safely during walking, and thus can be used industrially.

1 to 9 show an embodiment of the present invention.
Perspective view Back frame cross-sectional view Seat frame lock state explanation side view Side view of seat frame unlock state Front wheel installation state perspective view (front side) Front wheel installation state perspective view (rear side) Front wheel mounting part plan view (lock lever locked) Front wheel mounting partial plan view (selection lever locked) Folded side view Illustration of conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chair body frame 2 Main frame 3 Back frame 4 Front leg part 5 Rear leg part 6 Rotating shaft 7 Seat frame 8 Rotating shaft bracket 9 Back case 10 Handle 11 Brake lever 11A Long hole 12 Outer cylinder 13 Cross beam 14 Pin support cylinder 15 Bracket 16 Pin 17 Coil spring 18 Lever 19 Through hole 20 Through hole 21, 22, 23 Cross beam 24 Link rod 25 Receiving portion 26 Locking piece 27 Horizontal long guide hole 28 Bracket 29 Guide pin 30 Locking pin 31 Engaging recess 32 Lever 33 Guide cylinder 34 Guide piece 35 Front wheel 36 Rear wheel 37 Cross beam 38 Fixed cylinder 39 Lower end flange 40 Lock lever 41 Wheel support block 42 Ring 43 Selection lever 44 Axle 45 Front bearing 46 Lock block 47 Lock recess 48 Handle 49 Coil spring 50 Rear bearing 51 Lock block 52 Engaging recess 53 Coil Spring 54 Seat plate 55 Lumbar seat 56 Operation wire 57 Brake piece 58 Coil spring 59 Handle 60 Coil spring S Spring W Walking auxiliary vehicle

Claims (3)

  The seat frame is attached to a chair body frame having wheels attached to the front, rear, left and right so that the seat frame can be flipped up, and a latch pin is attached to the chair body frame side, and the latch pin is located below the seat frame. A locking piece formed at the rear end with an engaging recess to be engaged with is attached to be slidable back and forth, and the locking piece is attached by a spring so that the engaging recess engages with a locking pin of the chair body frame. The lever is urged rearward, and a lever is forwardly extended from the locking piece, the lever is disposed along the lower side of the seat frame, and the engaging recess of the locking piece is the chair. A walking aid characterized in that the front end of the seat frame is set so as not to substantially protrude from the front edge of the seat frame in a state in which the flip-up of the seat frame is locked by engaging with the locking pin of the main body frame car.   The walking auxiliary vehicle according to claim 1, wherein the chair main body frame includes a front leg portion and a rear leg portion, and the front leg portion and the rear leg portion are foldable in a state in which the seat frame is flipped up.   The chair body frame has a pair of left and right main frames comprising a back frame and a front leg portion that bends forward and downward from the lower end of the back frame; And a pair of left and right wheels that are rotatable at the lower end of the front leg of the main frame and the lower end of the rear leg, respectively. The seat frame is attached to the chair body frame so that the seat frame can be flipped up by passing the rear end of the chair frame to the lower part of the back frame of the pair of left and right main frames. A link rod is passed between the middle part of the both sides of the seat frame and the upper end of the rear leg part, and a receiving part for receiving the side part of the seat frame is provided at the upper end of the rear leg part. The locking pin is inserted from the receiving portion, while the locking piece is located on the lower side of the seat frame. The lever is attached to the pair of left and right locking pieces, and when the seat frame is flipped up, the rear leg portion is connected to the front leg of the main frame via the link. The walking auxiliary vehicle according to claim 2, wherein the walking auxiliary vehicle is folded to a side.

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