JP2013203289A - Auxiliary wheel structure of bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a child to lean how to ride a bicycle in a short period or to prevent an aged person from being injured owing to a tumble by riding a bicycle with auxiliary wheels attached whenever starting and stopping.SOLUTION: A length-directional intermediate part of a wheel arm mounted with auxiliary wheels 4 on right and left sides of a wheel rotary shaft 14 of a rear wheel 2 is pivoted rotatably, a length-directional end 15 is coupled rotatably to a U-shaped connecting member 18, and the other end of the U-shaped connecting member 18 is designed to surround a longitudinal frame 23 below a saddle 7. A link rod 19 is coupled to a U-shaped front end, and the other end is connected to an intermediate part of an operation lever 10 fitted rotatably to a fulcrum 12 of rotation.

Description

      In the present invention, the auxiliary wheel mounted on the left and right sides of the rear wheel side of the bicycle is stored behind the side of the rear wheel by manual operation, and the storage / mounting operation is performed by moving one operating lever provided at the rear part of the steering wheel back and forth. Thus, the present invention relates to a bicycle auxiliary wheel structure in which left and right auxiliary wheels can be stored or mounted simultaneously.

      In the conventional “bicycle auxiliary wheel storage device” shown in the following document, the auxiliary wheel is stored by opening it outside the rear axle of the bicycle. Due to the structure with the attached independent control lever, the left and right auxiliary wheels could not be stored and installed at the same time, making it difficult to operate instantaneously.

JP 2011-162174 A

    The present invention has been made in view of the above circumstances. First, in order not to increase the width of the bicycle, the auxiliary wheel is retracted behind the side surface of the rear wheel, and the storing / mounting operation is performed by one operating lever provided at the rear part of the steering wheel. By moving the front and rear, the left and right auxiliary wheels can be stored or mounted simultaneously.

(1) A structure that does not increase the overall width of the bicycle, equivalent to the current situation.
(2) A structure in which the left and right auxiliary wheels can be stored and mounted instantaneously simultaneously in one operation.
(3) Preventing erroneous operation with the brake lever attached to the handle.
(4) A structure that prevents the bicycle from falling without setting up the stand if it is equipped with auxiliary wheels when it is stopped.

(1) The structure is such that the auxiliary wheel is moved in parallel with the traveling direction of the side surface of the rear wheel, and the overall width remains unchanged.
(2) The left and right auxiliary wheels can be retracted and mounted at the same time while driving by operating a single lever.
(3) The control lever is located under the rear of the handle and should not be mistaken for the handle brake lever.
(4) If the auxiliary wheel is attached when traveling is stopped, it will not fall down without standing up.

By the above solution, the following points are greatly improved as compared with the conventional product.
(1) The overall width of the bicycle is the same as the conventional one, making it convenient for running and storing the bicycle.
(2) The left and right auxiliary wheels can be stored and mounted at the same time with one movement, regardless of whether a child or an elderly person, the unstable state before starting or stopping the bicycle can be stabilized by the mounting operation, and a fall accident can be prevented. It is only necessary to store the auxiliary wheel while traveling after the vehicle is stable after traveling.
(3) The brake lever attached to the handle and incorrect operation can be prevented.
(4) When you stop traveling, you can wear an auxiliary wheel, so you won't fall down without standing up.

Overall side view of this plan Auxiliary wheel mounting section (A-A 'section in Fig. 1) Sectional view of the operating lever (B-B 'section in Fig. 1) Moderation case explanatory diagram of the operating lever (viewed in the direction of arrow Y in Fig. 1)

Hereinafter, the structure and operation of the present plan will be described with reference to FIGS.
FIG. 1 is an overall side view of one bicycle, and the left and right sides of the 14 rear wheel rotation shafts of the 2 rear wheels are rotatably supported in the middle of the longitudinal direction of the wheel arm equipped with the 4 auxiliary wheels, and the 15 longitudinal direction ends. Is connected to the 18U-shaped connecting member in a rotatable manner, and the other end of the 18U-shaped connecting member is designed to enclose the 23 vertical frame under the seven saddles. Is rotatably connected to a 12 rotation fulcrum provided in the middle of 10 operating levers rotatably mounted on a 12 rotation fulcrum mounted on the 9 lower frame. 10 operation levers (see FIG. 4) 8 11 operation knobs are attached through 21 guide grooves of a 20 mode case attached to the upper frame.
The 21 guide groove extends in the direction of travel of the bicycle, 22 recesses are provided at both ends in a direction away from the 8 upper frame, and the 10 operation lever is deformed to be inclined from the 12 rotation fulcrum toward the 11 operation knob. In addition, it is designed to be stable when the round pipe of the 10 operation lever enters the 22 depressions under normal conditions. When moving the 10 operation lever, press the 10 operation lever against the 8 upper frame side. It is necessary to move linearly in the 21 guide groove after bending and exiting from the 22 depressions. This is because, as will be described in detail later in the explanation of operation, it is necessary to have a moderation effect that does not easily move the 4 auxiliary wheels from the retracted position or mounting position by external force.
In order to give the bending force, a deformed leaf spring may be used between the 12 rotation fulcrum and the 10 operation lever.

From the above description of the structure, the operation principle and the handling method will be described.
As an explanation of the operation, the solid line in Fig. 1 shows a state where 4 auxiliary wheels are installed, 11 operation knobs are pulled to the 7 saddle side, and 19 link lots connected to 13 link fulcrums are 18U-shaped. Pushing the connecting member, the 15 longitudinal end is located directly above the 14 rear wheel rotation shaft, so the 4 auxiliary wheels touch the ground like the 2 rear wheels and 3 wheels as seen in FIG. The bicycles stand side by side, and one bicycle can stand on its own to keep it from falling down without having to support the foot on the ground, thus avoiding the risk of falling.
Next, when the 11 operation knob is advanced to the 6 handle side, it becomes a diagram indicated by a virtual line, the 19 link lot is pulled in the traveling direction, the 15 end in the longitudinal direction is advanced, and the 4 auxiliary wheels are moved backward by the angle θ2. Thus, a clearance g between the four auxiliary wheels and the ground is obtained, and the vehicle can run with only two rear wheels. At this time, in order to increase the gap g, the operating angle θ1 of the 11 operation knob may be increased or the length between the 15 longitudinal end and the 14 rear wheel rotation shafts may be decreased.
Next, the usage method will be described. Basically, the usage for children who begin to practice spinning and riding is naturally equipped with 4 auxiliary wheels in the early days, and when you get a sense of running and gradually learn how to focus, 4 Since the auxiliary wheel is removed, the practice will be repeated for the time being. However, it is important to learn how to get the center of gravity quickly with minimal injuries from falls. Considering the situation, even if it is an adult, it is unstable when it starts running or stops, that is, when the speed is slow, so it is easy to stabilize the center of gravity for both adults and children by running. You can get it. Therefore, if the device of this proposal is used, even if a child starts running, it is possible to easily control the center of gravity by installing auxiliary wheels and pulling 11 operation knobs to the retracted position when stable running is started. It is. After learning how to get the center of gravity enough in that state, take out the 4 auxiliary wheels before slowing down, and if you stop, children will be able to wear the most important way without failing to fall, and quickly on any bicycle. You will be able to ride.
If you use this principle in reverse, you can prevent injuries caused by an elderly bicycle fall accident.
In other words, the old man knows how to get the center of gravity enough, but the ability to respond quickly declines and falls while knowing.
Therefore, I would like to spread the use of this plan as another bicycle for elderly people. A simple story is that the elderly can stop well, get off the bicycle, or stand up, but the center of gravity is not maintained, and the elderly fall down with the bicycle. Therefore, the elderly would like to propose the adoption of this plan in order to prevent injuries due to falling by always wearing auxiliary wheels before starting and stopping.

As explained above, it can be used as an effective means for promoting bicycle riding training for children and preventing accidents and injuries of the elderly.
In particular, as a way to quickly learn how to get the child's center of gravity, if you start running, store the auxiliary wheels, and be sure to use the auxiliary wheels whenever you stop at low speeds, so you can cyclize early without injury. I think I can understand.

1 bicycle, 2 rear wheels, 3 front wheels, 4 auxiliary wheels, 5 wheel arm, 6 handle, 7 saddle, 8 upper frame, 9 lower frame, 10 operation lever, 11 operation knob, 12 rotation fulcrum, 13 link fulcrum, 14 rear wheel rotation axis, 15 longitudinal end, 16 link means, 17 joint means, 18U-shaped connecting member, 19 link lot, 20 joint case, 21 guide groove, 22 recess, 23 vertical frame, IN mounting position, OUT Storing position, g clearance of auxiliary wheel at storage position, ⇔M push-pull operation,

Claims (4)

In bicycles with auxiliary wheels on the left and right sides of the rear wheels,
A rotation fulcrum of the operation lever is provided on the lower frame between the handle and the saddle, a link fulcrum provided at an intermediate position between the operation knob of the operation lever and the rotation fulcrum, and a longitudinal middle of the wheel arm of the auxiliary wheel in the rear part. The auxiliary wheel is pivotally supported on a wheel rotation shaft, the end in the longitudinal direction is connected by a link means, and the moderation means is used to push the pulling operation of the operation knob of the operation lever so that the auxiliary wheel is retracted and mounted. A bicycle auxiliary wheel structure characterized in that the switching operation can be performed while the vehicle is traveling. The bicycle auxiliary wheel structure according to claim 1,
The link means connects the left and right ends of the longitudinal end of the wheel arm, a U-shaped connecting member rotatably connected, and a link lot, and rotates the other end of the link lot with the link fulcrum of the operation lever. Bicycle auxiliary wheel structure characterized by being freely connected. In the bicycle auxiliary wheel structure according to any one of claims 1 and 2,
The moderation means has a round bar shape for the operation lever, and the front operation lever moves in a guide groove provided on an upper surface of a moderation case attached to the upper frame, A recess is provided in a direction away from the frame, and the operation lever is deformed in a direction away from the upper frame from the rotation fulcrum toward the operation knob, and the round bar falls into the recess in the guide groove. When the operation lever is moved, the operation knob is pressed against the upper frame to bend, and the moderation structure is configured such that the depression is escaped and moved to the depression on the opposite side, and the auxiliary wheel is stored. A bicycle auxiliary wheel structure characterized by not easily moving from either the position or the mounting position. In the bicycle auxiliary wheel structure according to any one of claims 1 to 3,
The operation mode of the operation lever is such that when the operation knob is moved in the traveling direction of the bicycle, the auxiliary wheel is placed in the retracted position, and when the operation knob is moved in the rear direction of the bicycle, the auxiliary wheel is Bicycle auxiliary wheel structure characterized by being placed in the mounting position.