JP3058823U - Unicycle with brake mechanism - Google Patents

Abstract

(57) [PROBLEMS] To provide a simple unicycle brake mechanism that does not slide even when used on an inclined surface and / or prevents the cargo from falling backward when lifting the handle upward and leaving the cargo from the front. Provided is a unicycle having a simple brake device which has a structure and is attachable to a conventionally used unicycle, and which is excellent in operability. The present invention relates to a unicycle comprising a wheel supported by a bifurcated bearing at a lower portion of a front portion of a frame, a handle disposed at a bifurcation at an upper portion of a rear portion, and a bucket fixed to an upper surface of the frame. A brake plate 4 which comes into contact with the wheel surface so that the upper surface of the wheel is pressed when the unicycle is vertically upright, and a puller 1 which is provided below the handle are connected by a wire 2 and transmitted from the puller 1. The brake force of the wire 2 causes the brake plate 4 connected and fixed to the rotating shaft 5 to move downward, thereby suppressing the braking of the wheels.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention belongs to the field of hand carts, and particularly relates to a brake device and a non-sliding unicycle for a unicycle used for transporting materials and agricultural work at a civil engineering construction site or the like.

[0002]

[Prior art]

 The wheelbarrow for small transport called a unicycle (commonly known as a cat wheel) has a bucket for transporting materials above the wheels, and a pair of handles for holding it with both hands. Because they are only wheels, they can be used easily even in narrow places, and are widely used for transporting on narrow mountain roads and construction sites, especially on scaffolding boards.

[0003] Such a unicycle can be easily transported simply by lifting the handle and moving forward, but has a drawback that it is unstable because the contact portion with the ground is only one place. In particular, in order to remove the contents of the bucket at the site, conventionally, the user puts his foot on the wheel to fix the unicycle so that it does not move forward, and then raises the handle greatly upward. For this reason, the stopping feet slip down from the wheels and become unstable, causing problems such as slipping down from narrow scaffolding boards and difficulty in accurately lowering the loaded materials to the intended location. Also, if moisture is attached to the wheel surface, the sole of the shoe is slippery and it is difficult to balance with one foot.

[0004] In particular, in the problem described above, when unloading a load forward, the handle is lifted up, and at the same time, the wheel, which is a ground contact surface, is lowered backwards, thereby disturbing the balance or preventing the load from being lowered to a predetermined position. There was a danger of overturning. This is because conventional unicycles were not equipped with a brake mechanism, and there was a risk that they would glide on slopes or in the state of unloading cargo.

[0005] On the other hand, in the invention of Japanese Utility Model Registration No. 2090687, a brake device is mounted on one of the bearing portions for supporting the wheels, and a brake bunt for pressing a brake cylinder fixed to the wheels and a lower portion of the handle are provided. There is disclosed a device in which a puller hanging vertically is connected by a wire, and a mudguard is provided on the outer periphery of the brake cylinder. With such a structure, braking can be surely performed even on a transportation path having poor working conditions, and transportation effort is reduced.

Japanese Utility Model Laid-Open Publication No. 63-16265 discloses a unicycle in which gears are provided on wheels of a carrier, and a pipe is lowered on the gears to apply a brake. It is said that it is possible for a carrier to stand a carrier without holding down the wheels with one foot, and that the carrier can stand easily and stably.

Further, Japanese Patent Application Laid-Open No. Hei 8-244624 discloses a device for stopping a wheel by depressing a pedal by a brake device mounted on a horizontal bar provided at a rear portion of a wheel of a carrier so as to be rotatable in the wheel rotation direction. Invention was created.

[0008]

[Problems to be solved by the invention]

 However, any of the above-mentioned brake devices requires a significant modification, and in particular, in Utility Model Registration No. 2090687, the structure when a disk brake device similar to a bicycle is mounted on an axle is complicated. It is not easily installed on existing unicycles, and it is also expensive. Further, in the device disclosed in Japanese Patent Application Laid-Open No. H8-244624, even if a conventional braking mechanism can be attached to a unicycle, there is a risk that the work may be inadequately balanced when the work is performed by using feet while lifting by hand. The device itself becomes a large-scale device like the above-mentioned invention.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a unicycle brake mechanism that does not slide even when used on an inclined surface and / or prevents the cargo from falling backward when lifting the handle upward and leaving the cargo from the front. It is an object of the present invention to provide a unicycle equipped with a simple brake device which has a simple structure, can be attached to a conventionally used unicycle, and has excellent workability.

[0010]

[Means for Solving the Problems]

 The unicycle according to the present invention is a unicycle comprising a wheel supported by a bifurcated bearing at a lower portion of a front portion of a frame, a handle disposed at an upper bifurcated portion at a rear portion, and a bucket fixed to an upper surface of the frame. When the unicycle is upright vertically, a brake plate that contacts the wheel surface so that the upper surface of the wheel is pressed against the wheel surface is connected to a puller hanging below the handle with a wire, and the wire transmitted from the puller is connected to the brake plate. The pulling force causes the brake plate connected and fixed to the rotating shaft to move downward, thereby suppressing the braking of the wheels.

[0011]

[Embodiment of the invention]

 This device is designed so that the wire connected from the puller is pulled in by narrowing the puller hanging below one handle of the unicycle body frame. The wire is connected to the brake plate, which is connected to the rotating shaft, and the back surface of the brake plate and the wheel surface come into contact with each other so that the wire is pulled downward by the pulling force of the wire. Then, wheel slippage of the unicycle is suppressed so that the rotation of the wheel is surely prevented by the friction. The pull mechanism hanging vertically below the handle is similar to the brake mechanism of the bicycle, and can be attached to each frame of the unicycle.

[0012]

【Example】

 Hereinafter, the features of the present invention will be specifically described based on embodiments shown in the drawings. FIG. 1 is an overall view from the side of a unicycle provided with a brake device according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view of the unicycle shown in FIG.

Referring to FIG. 1, reference numeral A denotes a unicycle, which includes a wheel 6, a frame member B for rotatably supporting the wheel 6, and a material storage member provided in the frame member B, as in the prior art. Is provided.

The frame member B is formed by cutting and bending a steel pipe or aluminum material, and has a pair of side frames B1 having a triangular side shape, and a pair of handle frame portions extending rearward from the upper end of the side frame B1. A handle portion D is formed on the extension of the wheel B2, and an axle frame portion B3 connected to a front portion of the handle frame portion B2 and, as clearly shown in FIG. The configuration of a working unicycle that is generally commercially available is formed by a horizontal frame B4 provided in the rotation axis direction.

As shown in FIGS. 1 and 2, a vertically extending puller 1 is connected by a wire 2 below one handle for lifting a unicycle, and the wire 2 is connected to a lower portion of a mounting plate 3 by a brake plate 4. It is to be stuck to. The wire 2 is fixed to the frame member B by an appropriate stopper, and the mounting plate 3 is fixed to the frame member B by using a stopper such as a bolt or a wing nut.

FIG. 3 is a schematic perspective view showing a main part of the brake device of FIG. As shown in FIG. 3, the brake plate 4, which is provided so as to come into light contact with the upper surface of the wheel 6, is connected and fixed to the rotating shaft 5 fixed to the mounting plate 3, and the pulling force from the wire 2 is applied. As a result, the rotating shaft 5 is rotatable in the horizontal axis direction, and the upper surface of the wheel 6 is tightened by moving the brake plate 4 downward. This operation state is shown in a side view of FIG. 4 showing the operation state of the main part of the brake device.

Since the wheel 6 is generally formed of a rubber tire, for example, when used in rainy weather or in a water place, mud or soil adheres to the rubber surface and the groove, so that the wheel 6 may be transported during transportation. It is the present situation that walking and working conditions are deteriorated. On the other hand, the brake plate 4 is in a state where no force is applied from the puller 1 in the use state of the unicycle as shown in FIG. Held in state. That is, since the brake plate 4 is always in light contact with the surface of the rotating tire during walking, it has an effect of removing mud and dirt from the surface. Further, by making an appropriate hole in the brake plate 4 by punching or the like (not shown), mud and soil can be discharged from the upper surface of the brake plate 4.

Further, as shown in FIG. 4, a non-slip type projection 7 having irregularities is formed on the lower surface of the brake plate 4 on the surface which comes into contact with the tire in order to increase the braking force. It can be suppressed. Further, the projections 7 may be small enough to fit in the grooves of the tire pattern, and this shape can more reliably remove mud and dirt entering the grooves. By forming the brake plate 4 in a substantially U-shape, the contact resistance at the apex of the substantially U-shape portion can be enhanced, and the upper surface of the tire is not damaged.

Therefore, by forming the brake plate 4 as described above, the brake plate 4 can prevent walking by mud and dirt and adverse effects of working conditions even on a transportation path with poor working conditions such as splashing of mud. By removing it, the contact surface between the wheel 6 and the brake plate 4 is maintained in a good state, so that braking can be surely performed by pulling up the puller 1 on an inclined surface that slides.

In implementing the present invention, in the experimental results, the brake plate 4 and the connecting members are made of iron and steel, but various steel materials such as stainless steel and reinforced plastic are used as brake plates. It is sufficient to use an appropriate material that can withstand, and the present invention includes all of the brake plates provided with projections and depressions and punching. The size and shape of the brake plate formed in a substantially U-shape are not particularly limited.

Furthermore, although the brake device of the present invention is originally desirably integrated with a unicycle as a product, it is also easy to retrofit the existing unicycle as a part part from the structure of the device. Therefore, it is possible for a unicycle buyer without a brake device to easily install the parts of the present invention.

[0022]

[Effect of the invention]

 As described above, according to the unicycle with the brake mechanism of the present invention, since braking can be surely performed even on a transportation path with poor working conditions, there are effects such as a reduction in transportation labor and a stable transportation operation. In addition, the conventional unicycle can be installed without major modification, and the production cost can be extremely reduced by providing a simple brake mechanism. is there .

[Brief description of the drawings]

FIG. 1 is a side view showing the entire unicycle according to the present invention.

FIG. 2 is a schematic perspective view of the unicycle shown in FIG. 1 in a vertical position.

FIG. 3 is an external perspective view showing a main part of the brake device of FIG. 1;

FIG. 4 is a side view showing an operation state of a main part of the brake device of FIG. 1;

[Explanation of symbols]

 A: Unicycle B: Frame member B1: Side frame B2: Handle frame B3: Axle frame B4: Side frame C: Bucket D: Handle 1: Pull 2: Wire 3: Mounting plate 4: Brake plate 5: Time Driving axis 6: Wheel 7: Projection

Claims (1)

[Utility model registration claims] 1. A one-wheeled vehicle having a bifurcated bearing at the front lower portion of a frame, a wheel disposed at a bifurcated portion at an upper rear portion, and a bucket fixed to an upper surface of the frame. A brake plate that comes into contact with the wheel surface so as to press against the upper surface of the wheel when it is vertically upright, and a puller vertically attached below the handle is connected with a wire, and the pulling force of the wire transmitted from the puller is used. A one-wheeled vehicle with a brake mechanism, characterized in that a brake plate connected and fixed to the rotating shaft moves downward to suppress braking of the wheels.