JP2000168571A - Collapsible portable wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collapsible portable cart easy to carry around and also be accommodated in a car trunk very easily by reducing the weight using a lightweight pipe material and structuring so that it can be collapsed into two halves by a single-touch operation. SOLUTION: A collapsible portable cart 50 is configured so that a pivot pin round which a first supporting rod 55 and a second support rod 56 rotate is installed in the pivoting position of the second supporting rod 56 and front legs 53 on the first supporting rod 55 so that rotation takes place outside in radial direction of pivoting pin 67 round which the first supporting rod 55 and front legs 53 rotate when the cart 50 is to be collapsed or erected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelbarrow, and more particularly to a corridor of a hospital or various facilities, a rooftop, and a relatively flat place such as a hospital or a promenade in the facility, a hotel lobby or a corridor. The present invention relates to a portable, collapsible wheelbarrow which is suitable for use, especially for a lightweight and simple wheelchair, a silver car, a stroller or the like which is suitable for carrying.

[0002]

2. Description of the Related Art The applicant has previously filed an application for a foldable wheelbarrow as shown in FIGS. 4 and 5 (filing date: July 4, 1997, application number: Hei 9-17938).
8). This wheelbarrow can be used in place of a walking stick, especially when an elderly person takes a walk, or, if necessary, can be seated or store shopping items, a so-called elderly car or It is the best to use as a silver car.

The wheelbarrow 10 has a front leg 12 having a front wheel 11 at a lower end, and is pivotable with respect to the front leg 12 (13).
Legs 15 connected to the rear wheel and having a rear wheel 14 at the lower end
, And a push rod 16. The push rod 16 and the upper end of the rear leg 15 are pivotally connected to each other (18, 19) by an armrest lever 17.
0 and one end of a pivot connection lever 21 are pivotally connected (22, 23), and the other end of the pivot lever 20 is pivotally connected (25) to an end of a seat pipe 24. One end of a rear leg folding lever 26 is pivotally connected (27) to an end of the front leg folding lever 26. One end of a front leg folding lever 28 is pivotally connected (29) to the other end of the rear leg folding lever 26. The other end of the front leg 12 is pivotally connected to the front leg 12 (30), the upper end of the front leg 12 is pivotally connected to the seat pipe 24 (31), and the front pipe 12 is pivotally connected to the seat pipe 24 (31). One end of the retraction lever 32 is pivotally connected (33) between the position and the pivot (25) position of the pivot lever 20, and the other end of the retraction lever 32 is pivotally connected to the rear leg folding lever 26 (3).
4) It is characterized by having been done.

[0004] This wheelbarrow can easily fold and spread the work with one touch, and when folded, the silver car can stand on its own easily and reliably. Since it can be folded into a substantially upright state in a stable state by the loop, it can be sufficiently accommodated even in a place where accommodation is narrow. In addition, since at least two sets of four-bar rotation chains are used, a stable and strong silver lens can be provided.

[0005]

However, this collapsible wheelbarrow can be moved in the front-rear direction so as to be able to withstand movement on roads having irregularities or stones or other obstacles. It has a sturdy structure using a plurality of reinforcing members extending in the vertical direction, so that the overall weight of the vehicle body is somewhat increased, and the volume is accordingly large. For this reason, for example, it is not suitable for mounting on a passenger car or dropping off from a passenger or the like in order to use it when a person with weak legs or a sick person is moved in a hospital or a hotel at a travel destination.

[0006]

According to the present invention, there is provided a push rod, a rear leg, a front leg, a seat rod, a first support rod, and a second support rod. The upper end of a rear leg having a rear wheel is pivotally attached to an intermediate portion of the push rod, the upper end of a front leg having a front wheel at the lower end is pivotally attached near the lower end of the push rod, and a seat rod is provided. The rear end is pivotally connected to the intermediate portion of the push rod, the front end is pivotally connected to the upper end of the first support rod, and the lower end of the first support rod is pivotally connected to the front leg. The second support rod pivotally attached to the rear leg is
The pivotal position of the front leg and the second support rod with respect to the first support rod is set between the first support rod and the front leg when the pushcart is folded or assembled. A portable foldable arrangement in which a pivot pin, which is the center of rotation between the first support rod and the second support rod, is arranged to rotate radially outward of the pivot pin, which is the center of rotation of the portable pin. Provide a wheelbarrow.

[0007]

FIG. 1 is a side view showing an assembled state or a used state of a foldable handcart 50 according to the present invention. The wheelbarrow 50 generally includes a push rod 51, a rear leg 52, a front leg 53, and a seat rod 54.
, The first support rod 55, the second support rod 56, and the footrest 5
And 7.

The push rod 51 is composed of a pair of vertical rod portions and a horizontal rod portion connecting the upper portions of the vertical rod portions to each other, and has a generally U-shape as viewed from the front or the rear as a whole.
In addition, the vertical bar portion has a substantially “No” shape as shown in FIG.

The rear leg 52 has an upper end pivotally connected by a pin 61 to a stopper 60 fixed by a known means to an intermediate portion of a vertical bar portion of the push rod 51, and supports a rear wheel 58 at a lower end. (Only one of them is shown in the figure).

The front leg 53 has an upper end pivotally connected by a pin 63 to a stopper plate 62 fixed by a known means near a lower end of a vertical bar portion of the push rod 51.
9, which comprises a pair of members (only one of which is shown in the figure), which comprises an upper inclined portion 53a, an intermediate horizontal portion 53b, and a lower vertical portion 53c, as shown in FIG. Is formed from.

The seat rod 54 is composed of a pair of side bars extending in the front-rear direction and a horizontal bar portion connecting the front portions of the side bars to each other and extending in the transverse direction. It has a U-shape, and the rear end of the side bar portion is a push rod 5
The pin 61 is pivotally attached to the upper end of the rear leg 52 together with the stopper 60 fixed to 1.

The first support rod 55 has a stopper 64 fixed to a front portion of the side rod portion of the seat rod 54 by a known means.
A side plate 66 having one end pivotally mounted by a pin 65 and having a generally triangular shape is fixed to the other end, and the other end and the side plate 66 are preferably fixed together by a pin 67 to the front leg. It is pivotally attached to the inclined portion 53a.

The second support rod 56 has one end pivotally attached to the top of the side plate 36 by a pin 68 (see FIG. 2) and the other end pivotally attached to a lower portion of the rear leg 52 by a pin 69. ing.

The footrest 57 is provided with a horizontal portion 53 of the front leg.
It is fixed to c through pins 70 and 71.

The side plate 66 having a substantially triangular shape and fixed to the other end of the first support rod 55 has, for example, an elbow-like shape by connecting the other end of the first support rod 55 to the position of the pin 68. It can be made unnecessary by bending and stretching it. That is, the relationship between the pivot positions of the front leg 53 and the second support rod 56 with respect to the first support rod 55 is such that the folding or assembly of the wheelbarrow 50 is performed between the first support rod 55 and the front leg 53. The first support rod 55 and the second support rod 5 are rotated so as to rotate radially outward of the pivot pin 67 which is the center of rotation.
A pivot pin 68, which is the center of rotation between them, is disposed.

A pin 72 is provided at the lower end of the push rod 51. Further, at a position close to the pin 72,
A similar pin 73 is provided near the upper end of the front leg 53. One of these pins 72, 73 (for example, pin 72)
, A hook fitting (not shown) is pivotally connected, and the hook fitting is locked to the other pin (for example, the pin 73), whereby the wheelbarrow 50 can be locked.

When the wheelbarrow 50 according to the present invention is used as a simple wheelchair, a seat portion is formed on the seat rod 54 so that a cared person, a patient, or the like can sit down with peace of mind. When used as a silver car, it is desirable to remove the footrest 57 because it interferes. Further, when used as a stroller, a seat, that is, a hammock, on which the infant can sit can be mounted on the seat rod 54.

When folding the wheelbarrow 50 according to the present invention, first, the hook (not shown) is released to release the locked state. Next, as shown in FIG.
Push the top of 1 forward. At this time, push rod 51 is pin 6
It is pushed forward around 1. Accordingly, the lower end of the push rod 51 moves rearward. Therefore, the upper portion of the front leg 53 is pulled rearward by the pin 63, and the other end of the first support rod 55 moves rearward with the rearward movement of the front leg 53. For this reason, the four-bar chain consisting of the rear leg 52, the seat rod 54, the first support rod 55, and the second support rod 56 is deformed from the state shown in FIG.

When the push rod 51 is further moved forward and downward from the position shown in FIG. 2 to the position shown in FIG. 3, the front leg 53 rises and pulls the front wheel 59 toward the rear wheel 58. Second
As the support rod 56 moves in the vertical direction, the seat rod 54 moves in the vertical direction and holds the first support rod 55 in the upright state, and finally takes the position shown in FIG.

In this position, the front wheel 59 and the rear wheel 58 are close to each other, and the horizontal bar portion of the push rod 51 approaches the ground. For this reason, the handcart 50 is folded in two. For this reason, the wheelbarrow 50 is folded to a position where the height is extremely low. Further, the width of the front leg 53 and the width of the rear leg 52
Is set to be different from each other, the front leg 53 or the rear leg 52 enters between the rear leg 52 or the front leg 53, and the thickness when folded can be reduced. The wheelbarrow 50 of the present invention has a very small number of components and is light in weight as compared with the wheelbarrow as shown in FIGS. 4 and 5 filed earlier, so that it can be mounted on a trunk of an automobile or the like. It is very easy to do. In order to maintain the folding position, a known folding position holding hook may be provided if necessary.

When assembling the wheelbarrow 50 from the folded position (FIG. 3) to the use position (FIG. 1),
First, the wheelbarrow 50 in a folded state is lowered from a trunk or the like, and is raised to a position as shown in FIG. The known folding position holding hook is then released. Thereafter, the push rod 51 is raised upward (see FIG. 2). As a result, the front wheel 59 at the lower end of the front leg 53 becomes the rear wheel 58 at the lower end of the rear leg 52.
, The assembly position shown in FIG. 1 can be easily and quickly taken. Finally, the assembly hook is locked to obtain the locked position.

Of course, since the caregiver can easily operate the wheelbarrow 50 and further maintain the wheelbarrow 50 in a stationary position when the care recipient is transferred to the wheelbarrow 50, the wheelbarrow can be pushed as necessary. The vehicle 50 is equipped with known braking devices, stopping devices, and the like.

Further, although not shown, an armrest bar can be pivotally connected to the push bar as required. Thereby, the care receiver can be stabilized when seated.

[0024]

The wheelbarrow 10 according to the present invention uses a lightweight pipe material to reduce the weight thereof, and can be easily carried by being almost folded in two with one touch. It can be easily stored in the trunk of a car, making it ideal as a portable folding wheelbarrow.

[Brief description of the drawings]

FIG. 1 is a side view when a handcart according to the present invention is used.

FIG. 2 is a side view showing a state in which the handcart according to the present invention is being folded.

FIG. 3 is a side view showing a state in which folding of the handcart according to the present invention is completed.

FIG. 4 is a side view of a wheelbarrow filed by the present inventor earlier.

FIG. 5 is a side view showing a state in which folding of the wheelbarrow filed by the present inventor is completed.

[Explanation of symbols]

 50: Wheelbarrow 51: Push rod 52: Rear leg 53: Front leg 54: Seat rod 55: First support rod 56: Second support rod 58: Rear wheel 58: Front wheel 67, 68: Pin

Claims (3)

[Claims] 1. A portable foldable wheelbarrow 50 comprising a push rod 51, a rear leg 52, a front leg 53, and a seat rod 5.
4, a first support rod 55, and a second support rod 56. An upper end of a rear leg 52 having a rear wheel 58 at a lower end is formed by a push rod 51.
The upper end of a front leg 53 having a front wheel 59 at the lower end is provided with a push rod 51.
The seating rod 54 has its rear end pivotally attached to the intermediate portion of the push rod 51, and its front end pivotally attached to the upper end of the first support rod 55. The lower end of the support rod 55 is pivotally connected to the front leg 53, and the lower end of the support rod 55 is pivotally connected to the rear leg 52.
The pivotal position of the front leg 53 and the second support rod 56 with respect to the first support rod 55 depends on the position of the first support rod 55 when the pushcart 50 is folded or assembled. A pivot pin 68 that is a center of rotation between the first support rod 55 and the second support rod 56 so as to rotate radially outward of a pivot pin 67 that is a center of rotation between the front leg 53 and the front leg 53. A portable collapsible wheelbarrow 50, characterized by being disposed. 2. The portable collapsible wheelbarrow 5 according to claim 1, wherein a footrest 57 is attached to the front leg 53.
0. 3. A side plate 66 is fixed to one end of the first support rod 55, a part of the side plate 66 is pivotally connected to the front leg 53 by a pin 67, and a second part is connected to another part of the side plate 66. Support rod 5
3. A portable collapsible wheelbarrow 50 according to claim 1 or claim 2, wherein the pivots 6 are pivotally connected by pins 68.