JP7389706B2 - hand truck - Google Patents

Description

The present invention relates to a handcart, and more particularly to a handcart that can travel in narrow spaces such as road boards, has a stable posture and does not wobble even when loaded with heavy loads.

Wheelbarrows are often used to transport cargo and dirt. A push unicycle has a wheel rotatably supported on a rotating shaft at the center of the lower side of the frame, and has left and right handles extending to the rear of the frame, while left and right auxiliary legs are provided at the lower rear of the frame, so that when the wheel is stopped, A structure in which the auxiliary legs are grounded is adopted (Patent Document 1). However, when a push unicycle is loaded with heavy loads, it is difficult to stabilize its posture, especially when going uphill or downhill.

On the other hand, in addition to the push unicycle, push two-wheelers are also known. Conventional push two-wheeled vehicles employ a structure in which a rotating shaft is provided on the lower side of the frame and extends in the vehicle width direction, and two wheels are rotatably supported on the rotating shaft at a distance from each other (Patent Document 2, Patent Document 3).

Utility model registration No. 3187515 Japanese Patent Application Publication No. 2004-168246 Japanese Patent Application Publication No. 2006-240326

However, because the distance between the two wheels of the conventional push two-wheeled vehicle is wide, it is not possible to run it in a narrow place, for example, on a road board about 25 cm wide at a construction site.

In view of such problems, it is an object of the present invention to provide a handcart that can travel even in narrow spaces such as road boards, has a stable posture even when loaded with heavy loads, and is hard to wobble.

Therefore, the hand-held transport vehicle according to the present invention is a hand-held transport vehicle that can run stably even in narrow spaces, and the front half has a side surface shape that is curved diagonally upward and is U-shaped in plan. A main frame, a loading platform mounted and fixed on the main frame, and a U-shaped plane provided under the front half of the main frame, two widths of unicycle tires between both sides of the U-shape. A tire frame is provided with a rotation axis extending in the width direction of the vehicle, and the tire frame is rotatably supported adjacent to the rotation axis, so that the tire frame can rotate in the same direction and in opposite directions. The present invention is characterized in that it includes two tires, an auxiliary leg provided below the rear half of the main frame, and a handle extending rearward from the main frame.

One of the features of the present invention is that two tires are pivoted adjacent to each other so that they can rotate in the same direction and in opposite directions.

As a result, the tire grounding point is one point for a unicycle, but the present invention has two points, so even if heavy loads are loaded, it is difficult to wobble, and even weak women and elderly people can run stably. Moreover, even when used in muddy conditions, it does not sink easily and can be run stably.

In addition, it provides a sense of stability when used on uphill or downhill slopes when loaded with heavy loads, and since there are two points of contact for the tires when moving the load, it is possible to move the load stably against the front. Furthermore, since the two tires can rotate in opposite directions, the transport vehicle can be turned on the spot, making it easy to use.

In addition, compared to conventional unicycles, the unicycle can be stably run in a narrow space, for example, on a road board of about 25 cm.

If tires are placed next to each other, dirt will easily get stuck between the tires. Therefore, it is preferable to provide a mud-removal arm between the tires so as to be able to swing around the rotating shaft.

1 is a schematic perspective view showing a preferred embodiment of a handcart according to the present invention. It is a bottom view showing the above-mentioned embodiment. FIG. 7 is a perspective view of main parts showing a second embodiment.

Hereinafter, the invention will be described in detail based on specific examples shown in the drawings. 1 and 2 show a preferred embodiment of the hand truck according to the invention. In the figure, the handcart 10 is equipped with a main frame 11 made of a metal pipe. A loading platform 12 is mounted and fixed. In addition, although the loading platform 12 is illustrated as having a shallow shape, it may have a deep shape.

Further, a tire frame 13 made of a metal pipe is provided below the front half of the main frame 11, and is connected to each other by a reinforcing pipe 13A. This tire frame 13 is manufactured in a U-shape in plan, and a gap equivalent to two widths of unicycle tires is formed between both side portions 13B of the U-shape, and bearings 17 are provided with brackets on both side portions 13B. A rotating shaft 14 extends in the vehicle width direction and is inserted between the bearings 17, and is attached with a nut 14A.

Two tires 18 of a unicycle are supported adjacent to each other on the rotating shaft 14, and the two tires 18 can rotate in the same direction and in opposite directions.

A pair of left and right auxiliary legs 15 are attached to the lower half of the main frame 11, and a handle 16 made of a metal pipe is provided at the rear end of the main frame 11 to extend rearward.

As described above, since the two tires 18 are pivoted adjacent to each other and are configured to be able to rotate in the same direction and in opposite directions, the grounding point of the tires 18 is only one point on a unicycle, whereas a unicycle has one point. The push truck in this example has two points, so it does not wobble even when loaded with heavy loads, can be operated stably even by weak women and elderly people, and does not sink even when used in muddy conditions. It is difficult to drive and can be run stably.

Furthermore, when carrying a heavy load, there is a sense of stability when using it on uphill or downhill slopes, and since the tires 18 have two contact points when moving the load, the load can be moved stably in front of the vehicle. Furthermore, since the two tires 18 can rotate in opposite directions, the transport vehicle can be turned on the spot, making it easy to use.

In addition, compared to conventional unicycles, the unicycle can be stably run in a narrow space, for example, on a road board of about 25 cm.

If two tires 18 are provided adjacent to each other, earth and sand will easily become clogged between the tires 18. Therefore, it is preferable to provide an arm 20 for removing mud between the tires so as to be able to swing around a rotation axis.

10 Hand truck 11 Main frame 12 Loading platform 13 Tire frame 14 Rotating shaft 15 Auxiliary leg 16 Handle 18 Tire 20 Arm

Claims (1)

This handcart is capable of running stably even in narrow spaces, and includes a main frame (11) whose front half has an upwardly curved side surface and a U-shape in plan; ) and a loading platform (12) mounted and fixed on the main frame (11), which is provided under the front half of the main frame (11), forming a U-shape in plan, and between both sides of the U-shape, two widths of unicycle tires are provided. A tire frame (13) is provided with a rotation axis extending in the vehicle width direction, and the tire frame (13) is rotatably supported adjacent to the rotation axis, and rotates in the same direction and in opposite directions. two tires (18) that can be rotated to ) and ,
A mud-removing arm (20) is swingably provided on the rotating shaft between the tires (18), and the distal end step of the mud-removing arm (20) is in contact with the tire frame (13). A hand truck characterized by the fact that it is connected to the vehicle.

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