JPH03128762A - Foldable type hand cart - Google Patents

Abstract

PURPOSE:To simultaneously place a baby and a cargo by a method wherein a U-shaped seat pipe is rotatably mounted to a handle pipe with front wheels, the opening end part of the seat pipe are connected to a rear pipe through a link, a seat plate is openable, and a cargo-carrying platform is mounted below the seat plate. CONSTITUTION:A handle pipe 1 with front wheels 18 located to a part bent in an L-shape and a rear pipe 2 are held in an unfolded leg state by means of an L-shaped seat pipe 3 having two side parts pivotally mounted to the handle pipe 1 and an opening end part connected to the rear pipe 2 through a link 11. The seat pipe 3 is always energized in a counterclockwise direction through the force of a spring 12, and is kept in a horizontal state by means of a stopper 13. A seat plate 4 is openably mounted through a bracket 14 in front of the seat pipe 3. A cargo-carrying platform 5 is mounted below the seat plate 4 horizontally and foldably in linkage with the seat pipe 3 through a link 17. Thus, by opening the seat plate, a cargo can be easily placed on the cargo-carrying platform, and a baby can be also seated.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a foldable handcart with a seat, which is extremely convenient for shopping, walking, carrying small luggage, etc., and is also suitable as a walking aid. In particular, the present invention relates to a foldable handcart that pursues light weight, ease of use, and convenience by simplifying the structure and design.

Conventional technology Conventional handcarts used for carrying small items such as shopping etc. have a slightly different structure, but basically they have a handle pipe with a top, a bag attached to the bottom, and a vertical wheelbarrow. The structure is such that it can stand on its own.

However, this type of conventional handcart has a relatively complicated structure and is heavy, and although it is foldable,
It had the disadvantage that it took time and effort to open and fold the eight legs, and it was also inconvenient to put in and take out luggage.

Purpose of the Invention This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology.It is lightweight by simplifying the structure and design, and the legs can be opened and folded with one-touch operation, and it is also possible to put in and take out luggage. The aim is to provide a simple foldable handcart.

Structure of the Invention The folding handcart according to the present invention includes a handle pipe in which the open end of a U-shaped pipe is bent into an L-shape and a rotary front wheel is provided in that part, and an armrest in which the upper end is bent. A pair of rear pipes each having a rear wheel at the lower end are rotatably connected at the armrests of the rear pipes to form a main body, and a U-shaped seat pipe is connected vertically to the handle pipe of the main body. In addition to being rotatably attached, the open end of the seat pipe is connected to the rear pipe via a link, and a counterclockwise force is always applied by a spring applied between the seat pipe and the handle pipe, and the rear pipe is A seat plate having a mechanism that is held horizontally by a horizontally installed stopper bar, pivoted to the front part of the seat pipe so as to be rotatable in the vertical direction, and fixed at a predetermined opening angle by a stopper mechanism. The cargo platform, which is a U-shaped pipe pivotally attached to the lower part of the handle pipe so as to be freely rotatable in the vertical direction, and the seat pipe are connected via a link, and the handle pipe, rear pipe, seat pipe, and cargo platform can each be folded. The gist of this paper is a foldable handcart that has been made possible.

Further, in the above-mentioned handcart, the rear wheel of the rear pipe is attached by loosely fitting the axle into a long hole bored in the pipe, and the axle is connected to a brake rod pivotably connected to the rear pipe so as to be vertically rotatable. It is equipped with a braking mechanism that is supported by a buffer spring hung between the wheels and presses the rear wheel with an elliptical brake element pivoted to the brake lever by rotating the brake lever in a counterclockwise direction. This is the summary.

A handle pipe consisting of a U-shaped pipe constituting the main body and a pair of rear pipes are rotatably connected so that the handle pipe is located on the inside and the rear pipe is located on the outside.

The main body consisting of a handle pipe and a rear pipe is held open at a predetermined angle by a U-shaped seat pipe whose both sides are pivotally connected to the handle pipe and whose open end is connected to the rear pipe via a link.

The seat pipe is always biased counterclockwise by a tension spring hooked between the seat pipe and the handle pipe, and is held horizontally by coming into contact with a stopper bar placed horizontally between the left and right rear pipes from below.

The seat plate is attached to the front part of the seat pipe via a bracket so as to be freely rotatable in the vertical direction using the seat pipe as a fulcrum,
The handcart can be opened and closed from the rear side, and a stopper bin protruding from the handle pipe side is passed through a long hole drilled in the bracket to be fixed at a predetermined opening angle.

The loading platform made of a U-shaped pipe is held almost horizontally through a link connected to the sheet pipe, and
It is designed to be folded in conjunction with the seat pipe.

Since the loading platform is located almost directly below the seat pipe, the seat plate serves as a lid for storing bags and other items on the loading platform, and the lid can be opened and closed from the back side of the handcart.

The main body is closed using the joint between the handle pipe and the rear pipe (the armrest is the part) as a fulcrum, and the seat pipe is closed clockwise using the pivot point between the handle pipe and the handle pipe as a fulcrum, against the tension spring applied between the handle pipe and the handle pipe. In conjunction with this rotation, the cargo platform rotates counterclockwise around the pivot point with the handle pipe as a fulcrum and is folded.

When the main body is folded, the handle pipe and rear pipe are parallel to each other, and the rear wheel attached to the front wheel catcher pipe attached to the lower bent part of the handle pipe is positioned in the front and back, allowing the main body to stand up vertically.

Vibration of the glossy pipe rear wheel is absorbed by a buffer spring placed between the brake rod and the axle, and when a load is applied to the rear wheel against the buffer spring, the wheel comes into contact with the brake rod. The brakes will be applied automatically.

Note that a buffer mechanism for absorbing vibrations may be built into the carrier pipe.

As a means of rotating the brake rod counterclockwise, that is, applying braking force, it is possible to use a method of operating the brake lever provided on the handle pipe grip via a wire, similar to the brakes of bicycles, etc. can.

Since an elliptical brake element has a better braking effect than a circular brake element, an elliptical or similar shape is preferable.

Embodiment Fig. 1 is a perspective view showing the folding conger pushcart according to the present invention in a usage state with its legs open, Fig. 2 is a perspective view showing the same pushcart in a folded state, and Fig. 3 is a perspective view showing the same as the above with its legs opened. A perspective view showing the handcart in use with a bag placed on it, Fig. 4 is an enlarged longitudinal cross-sectional side view showing the mounting of the seat plate of the same pushcart, and Fig. 5 is an enlarged view of the braking mechanism of the same pushcart. FIG.

In the figure, (1) is a U-shaped handle pipe, (2)
is the rear pipe, (3) is the seat pipe, (4) is the seat plate, (5) is the cargo platform, (6) is the brake lever, and (7) is the brake lever.

The handle pipe (1) and rear pipe (
2> is the bent t+h part (2) formed at the upper part of the rear pipe.
-1) protrudes from the handle pipe (1), and these parts are rotatably connected by a connecting pin (10).

The U-shaped seat pipe (3) has both parallel pipe parts attached to the handle pipe (1) so that it can freely rotate vertically with a support shaft (8 pins), and is attached to the rear pipe (11) via a link (11). The stopper bar (13) is connected to the rear pipe (2) and is constantly biased with a counterclockwise force by a tension spring (12) hung between it and the handle pipe (1). ) from below to maintain a horizontal state.

The seat plate (4) has its end rotatably attached to the front end of the seat pipe (3) via a bracket (14), and has a stopper bin (15) protruding from the seat pipe (3).
) is loosely fitted into an elongated hole (16) drilled in the bracket, thereby making it possible to fix the seat plate (4) at a predetermined opening angle (Fig. 4).

The loading platform (5), which is made of a U-shaped pipe, has its end attached to the handle pipe (1) with a bin (9) so that it can rotate freely in the vertical direction, and a link that is hung between it and the seat pipe (3). (17) is held horizontally and interlocks with the sheet pipe. It is structured as follows.

In addition, the loading platform (5-inch) has a fence (5-1) formed at the rear end to prevent cargo from falling.

The front wheel (18) on the handle pipe side is a caster (19)
It is rotatably attached via the

On the other hand, for the rear wheel (20) on the rear pipe side, the axle (20-1) is loosely fitted into the long hole (2-2) drilled at the bottom of the rear pipe (2), as shown in the enlarged view in Figure 5. The mechanism is such that it is damped by a coil spring (22) interposed between the braking rod (6) which is rotatably attached to the rear pipe (2) with a pin (21), and The rod (6) is biased with a clockwise force by a restoring spring (26).

The braking mechanism operates by pulling a braking wire (24) connected to the end of the brake rod (6) with a brake lever (7) attached to the handle pipe (1).
rotates counterclockwise against the restoring spring (26), causing the oval brake (25) to press the rear wheel (20), while also pushing the rear pipe (2) downward and causing the coil spring ( When a load is applied to the rear wheel (20) against the brake force (22), the axle (20-1) moves upward in the elongated hole (2-2), causing the rear wheel (20) to engage the brake (25). The mechanism is such that the brake is applied when the brake comes into contact with the brake.

When the legs of the wheelbarrow with the above structure are opened, the seat pipe (3) is connected to the stopper bar (
13) from below to maintain a horizontal state, and at the same time, the loading platform (5) is connected to the seat pipe (13) via the link (17).
) and becomes horizontal.

Furthermore, the handle pipe (() and rear pipe (2) that make up the main body are maintained at a constant degree of leg opening via the seat pipe (3) and link (11).

Also, if you sit on the seat board (4), the rear pipe (2)
The upper bent part (2-1) can be used as an armrest.

When folding this wheelbarrow, use the handle pipe (1
) and the top of the rear pipe (2) and pull them together to easily fold it.

In addition, as shown in Figure 2, the seat pipe (3) is folded diagonally with the front side up, and at the same time the seat pipe (3)
is folded with the front side down.

Also, when folded, the front wheel (18) is attached to the bent part of the handle pipe (1), so the rear pipe (2)
It can be folded into a flat shape without hitting the rear wheels (20) attached to it, and can stand vertically on its own by the front wheels (18) and rear wheels (20).

Figure 3 shows the state in which a rectangular box (27〉) is attached to the loading platform (5) of a handcart with its legs spread open. You can sit on it even when it is attached.

Furthermore, since the seat plate (4) can be opened and closed from the back side, luggage can be taken in and out from the back side while pushing the car into the box (27).

Effects of the Invention Since the foldable handcart according to the present invention is constructed as described above, it exhibits the following effects.

■ The main body consists of only the handle pipe and rear pipe, making it structurally simple and lightweight.

■ The legs of the main unit can be opened and folded with one touch,
The seat plate can be opened and closed from the back of the main unit, making it convenient to put in and take out luggage.

■ The main unit can be folded flat, so it does not take up much space, and the structure allows it to stand up vertically when folded, making it convenient to stand up.

■ It is convenient because the brakes are automatically applied when you apply a load to the rear wheel while holding the handle pipe.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the foldable handcart according to the present invention with its legs opened, Fig. 2 is a perspective view showing the foldable handcart in its folded state, and Fig. 3 shows the same handcart with its legs spread. Fig. 4 is a perspective view showing the state in which the bag is loaded; Fig. 4 is a vertical sectional side view showing the mounting of the seat plate of the same pushcart in an enlarged manner;
The figure is an enlarged side view showing the braking mechanism of the same push cart. 1... Handle pipe 3... Seat pipe 5... Cargo platform 7... Brake lever 2... Rear pipe 4... Seat plate 6... Brake lever

Claims (1)

[Scope of Claims] 1. A handle pipe having an open end of a U-shaped pipe bent into an L-shape and having a rotary front wheel thereon, and 2. A handle pipe having an upper end bent to form an armrest and a rear wheel at the lower end. The pair of rear pipes are rotatably connected at the armrest portions of the rear pipes to form a main body, and a U-shaped seat pipe is pivotally connected to the handle pipe of the main body so as to be rotatable in the vertical direction. The open end of the seat pipe is connected to the rear pipe via a link, and a spring applied between it and the handle pipe constantly applies a counterclockwise force, and a stopper bar installed horizontally on the rear pipe holds it horizontally. The lower part of the handle pipe has a seat plate which is pivotally attached to the front part of the seat pipe so as to be rotatable in the vertical direction and can be fixed at a predetermined opening angle with a stopper mechanism. A loading platform consisting of a U-shaped pipe rotatably pivoted in the vertical direction is connected to the seat pipe via a link, so that the handle pipe, rear pipe, seat pipe, and loading platform can each be folded. A foldable wheelbarrow. 2 The rear wheel of the rear pipe is attached by loosely fitting the axle into a long hole drilled in the pipe, and a buffer spring is hung between the axle and a brake rod that is pivotably pivoted to the rear pipe in the vertical direction. 2. The foldable hand push according to claim 1, further comprising a braking mechanism which presses the rear wheel with an oval brake that is supported by the brake lever and is pivoted to the brake lever by rotating the brake lever in a counterclockwise direction. car.