JPH02229B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bicycle that can be disassembled and partially rearranged to become a unicycle and wheeled skates.

Conventional bicycles of this type include bicycles used in circuses and the like. This is because the frame that connects the saddle and the rear wheel is detached from the rest of the frame along with the saddle and the rear wheel, and the wheel that rotates with the rear wheel is made to protrude outside the frame.
Crank pedals are connected to both ends of this axle.

However, such bicycles cannot be converted into anything other than a unicycle, which makes them less fun.
Furthermore, in the case of a unicycle, other parts of the frame and the handle, front wheel, etc. attached to other parts of the frame cannot be used as any other play equipment.

Furthermore, since the crank pedal is attached to the rear wheel, the riding position when riding a bicycle is
It is very different from the riding position of a typical bicycle, and has the disadvantage that it is difficult to ride.

This idea allows you to enjoy one bicycle as three types of vehicles by disassembling it and rearranging parts of it, and when you use it as a bicycle, the riding position is the same as that of a regular bicycle. The aim is to provide bicycles that are easy to ride and easy to ride.

Therefore, the bicycle of the present invention includes a front wheel section, a rear wheel section, a central section interposed between the front wheel section and the rear wheel section, and a loading platform section located behind the rear wheel section, and The front wheel portion includes a handle, a handle post to which the handle is attached, a front wheel, a front fork to which the front wheel is attached, a head tube bearing the handle post and front fork, and a joint provided on the head tube. The rear wheel portion includes a saddle, a rear fork extending downward from the saddle, and a rear wheel axle bearing at the lower end of the rear fork and having crank pedal attachment portions at both ends. Consisting of a ring and a connecting part provided on the rear fork,
The central part includes a trunk structure, a front joint part and a rear joint part which are provided at the front and rear ends of the trunk structure and are detachable from the joint parts of the front wheel part and the rear wheel part, respectively, and the center of the trunk structure. Between a crankshaft which is bearing at the bottom, has a large sprocket gear, and has crank pedals removably attached to both ends, and the large sprocket gear and the small sprocket gear provided on the rear axle. The loading platform consists of a loading platform, a small wheel bearing a bearing on the loading platform so as to protrude below the lower surface of the loading platform, and a front wheel extending upward from the front of the loading platform. The neck part has a joint part for the joint part of the rear fork and a joint part for the rear fork.

A bicycle constructed in this manner has a front wheel joint and a front joint of the body structure, a rear wheel joint and a rear joint of the body structure, and crank pedals attached to both ends of the crankshaft. If you connect the cargo area to the rear fork, you can use it as a normal bicycle.

At this time, the crankshaft is located in front of the saddle, so the positional relationship between the saddle, crankshaft, and handlebars is not much different from that of a regular bicycle, so you should ride in the same position as a regular bicycle. Easy to ride.

In addition, if you uncouple the above-mentioned joints and disassemble them into the front wheel part, rear wheel part, center part, cargo platform part, and crank pedal, and attach the crank pedal to the rear axle of the rear wheel part, the rear wheel part and crank You can make a unicycle from the pedals.

Furthermore, by connecting the connecting part of the front wheel part of the loading platform to the connecting part of the front wheel, the small wheel provided on the bottom of the loading platform and the front wheel of the front wheel can be used to skate on the ground like a three-wheeled skate. You can skate with wheels.

Therefore, according to this invention, by disassembling and rearranging some parts, it is possible to realize a bicycle that can be enjoyed as three types of vehicles: a bicycle, a unicycle, and a wheeled skate, and moreover, when used as a bicycle, the riding posture can be changed. The riding position is the same as that of a regular bicycle, so
A bicycle that is easy to ride can be created.

An example of this invention is shown below in Figures 1 to 10.
This will be explained based on the diagram.

In FIGS. 1 to 3, 2 is a front wheel portion, and the front wheel portion 2 includes a handle 20, a handle post 21,
It is composed of a head tube 22, a front fork 26 consisting of front arms 24a and 24b, and a front wheel 28.

Reference numeral 1 denotes a rear wheel portion, and this rear wheel portion 1 includes a saddle 4, a saddle stem 5, a stem tube 6 through which the saddle stem 5 is inserted, and two rear arms 8a extending downward from the lower end of the stem tube 6. , 8b, a rear fork 10, a rear wheel 12, a rear wheel axle 14, etc.

Reference numeral 3 denotes a central portion, and this central portion 3 includes a body structure 34 consisting of a shallow V-shaped main pipe 30 and a reinforcing pipe 32 installed horizontally in the middle of this main pipe 30; A crank hanger 36 provided at the bent portion, a crankshaft 38 and a large sprocket gear 39 rotatably supported by the crank hanger 36, and two stays 40 extending rearward from the crank hanger 36.
It is composed of a and 40b.

Note that 42 is a crank pedal.

Further, the loading platform section 44 includes a bottom plate 132 and a neck section 13.
4, small wheels 136, etc.

As shown in FIG. 4, the rear wheel axle 14 has six teeth 48 parallel to the axial direction of the rear wheel axle 14 in the center.
A spline shaft portion 46 is provided, and this spline shaft portion 46 fits into a spline hole with a spline groove 52 of a hub 50 of the rear wheel 12, and the rear wheel axle 14 and the hub 50 rotate together. It's becoming like that.

Furthermore, the rear wheel axle 14 has a cylindrical portion 54, a male threaded portion 56,
A circular column portion 58 and a square column portion 60 are formed, and a hook 62 is formed at the outermost part of the square column portion 60.

An inner ball pusher 64 having a guide groove 63 on the outside is fitted into the cylindrical portion 54 of the rear wheel axle 14.
This inner ball pusher 64 is brought into strong contact with the hub 50 by an outer ball pusher 66 which has a guide groove 65 inside and is screwed into the male threaded portion 56, thereby clamping the hub 50.

In addition, a bowl body 72 in which both opening edges of the inner circumferential surface are formed into bowls 68 and 70, respectively, is fitted into the lower ends of the rear arms 8a and 8b from the outside. , 65 to form a bearing 75, and the rear arms 8a, 8b connect the hub 50 and the rear wheel shaft 1.
4 is rotatably supported.

Furthermore, a small sprocket gear 76 is screwed into the male threaded portion 56 on the right side in FIG. 4, and is fixed to the rear wheel axle 14 by a lock nut 78.

Further, the cylindrical portion 58 of the rear wheel axle 14 is supported by a roller bearing 80 consisting of a retainer and rollers, and this roller bearing 80 is supported by brackets 82a, 8
2b, and is prevented from coming off by a retaining ring 92.

The bracket 82a located on the right side of FIG.
A cylindrical main body 86 having a flange 84 at one end is inserted into a long hole 88 provided at the tip of the stay 40a.
The collar 90 is inserted from the outside of the stay 40a, and a collar 90 is screwed onto the other end of the stay 40a that projects inside. A hook 94 is provided on the surface of the tsuba 84.
The distance between the bracket 8 and the flange 90 is formed to be larger than the thickness of the elongated hole 88 portion of the stay 40a.
The rear wheel axle 14 can be tilted rearward about 2a.

Further, a latch 95 is attached to the stay 40a, and the U-shaped portion of the latch 95 is connected to the hook 94.
When the bracket 82a is hooked on the bracket 82a and the hook 95 is tilted forward, the bracket 82a strongly contacts the front edge of the elongated hole 88 and is fixed. In addition, by raising the latch 95, the latch 95 can be removed from the hook 94, and the bracket 82 can be removed.
a can be freely moved within the elongated hole 88.

Also, the bracket 82b located on the left side of FIG.
has the same shape as the bracket 82a except that the collar 90 is formed integrally with the main body 86, and supports the cylindrical portion 58 rotatably by a roller bearing 80. This bracket 82b is fitted into a notched groove 98 provided forward from the tip of the stay 40b, and is fixed by coming into contact with the front edge of the notched groove 98 by a latch 95 provided on the stay 40b. , when the latch 95 is raised and removed from the hook 94, it can be pulled out from the notch groove 98.

Furthermore, on the inside of the tip of the stay 40a, a small annular sprocket gear 100 having a large opening in the center through which the rear wheel axle 14 is inserted is installed, and a bearing is installed at a position such that its center coincides with the rear wheel axle 14. It is rotatably attached via 102.

Furthermore, a chain changing device 104 is attached to the stay 40a as shown in FIG. This chain changing device 104 is almost the same as a well-known external transmission, and its operating lever 106 is attached to the stay 40a in front of the chain changing device 104, and by operating the operating lever 106, The chain 110 that normally hangs on the small sprocket gear 76 is replaced by the small sprocket gear 100.

As shown in FIG. 6, a short pipe-shaped coupling part 108 extending diagonally downward is attached to the front side of the stem tube 6, and a hook 112 is attached to the circumferential surface of this coupling part 108. . Normally, the rear side joint part 114 provided at the rear end of the main pipe 30 is inserted into this joint part 108, and the hook 112 is hooked onto the hook 116 provided on the peripheral surface of the main pipe 30. pipe 30
and the stem tube 6 are combined and fixed.

Further, on the rear side of the head tube 22, as shown in FIG. 7, a short stepped pipe-shaped joint portion 118 extending diagonally downward is formed. Usually, the front side joint part 119 provided at the front end of the main pipe 30 is fitted into this joint part 118, and the latch fitting 120 provided on the peripheral surface of the main pipe 30 is connected to the hook 1.
22, the main pipe 30 and head tube 22 are connected and fixed.

Further, as shown in FIG. 8, the crank pedal 42 has a square hole 12 on the surface side of the large end of the crank arm 123, which corresponds to the square column portion 60 of the rear wheel axle 14.
4 is provided, and this square hole 124 is connected to the rear wheel axle 14.
It fits into the square pillar part 126 of the crankshaft 38 and the square pillar part 60 of the rear wheel axle 14, which are formed to have the same dimensions as the square pillar part 60 of. Furthermore, near the large end of the crank arm 123, the crank pedal 4 is hooked onto a hook 128 provided at the tip of the crankshaft 38 and a hook 62 provided at the tip of the rear wheel axle 14.
2 is provided with a latch 130 for fixing it to the rear wheel axle 14 or crankshaft 38. This crank pedal 42 is normally coupled to the crankshaft 38.

Further, as shown in FIGS. 1 and 2, the loading platform section 44 is composed of a flat bottom plate 132 and a neck section 134 that extends upward from the front part of the bottom plate 132 while being slightly tilted forward. . The bottom plate 132 has two small wheels 13 on both sides that can rotate freely.
6 is provided.

As seen in FIG. 10, the neck part 134 is composed of an outer cylinder 138, an inner cylinder 140 inserted into the outer cylinder 138, a connecting part 142, etc., and the inner cylinder 140 is attached to the upper end of the outer cylinder 138 so that it can be expanded or contracted arbitrarily. A tightening lever 143 is provided for fixing in the closed state. Furthermore, the inner cylinder 13
8 is provided with a forward-slanting joint 142, which has a shape corresponding to the joint 108, and has a latch 144 provided on its circumferential surface.
It can be fixed to the coupling part 118 by. Normally, the neck portion 134 of the cargo bed portion 44 is fixed to the stem tube 6 by a stopper 146 so that the bottom plate 132 is at approximately the same position as the cargo bed of a general bicycle. It can be removed by

With the bicycle configured in this manner, the screws of the stopper 146 are loosened, the loading platform section 44 is removed, the latch fittings 95, 116 are raised to uncouple the hooks 94, 112, and the hub 50 is moved backward. , Twist the bracket 82 counterclockwise on the drawing in Figure 4.
b from the notch groove 98 and remove the bracket 82b from the rear wheel axle 14, and then move the hub 50 to the left side in the drawing, the rear wheel axle 14 can be attached to the bracket 82b.
2a, and the rear wheel part 1, that is, the rear wheel 12, the saddle 4, the rear fork 10, etc., are integrated into the central part 3, that is, the trunk structure 34 and the stay 4.
Can be removed from scratch without the need for tools.

Then, remove the latch 130 and
Place the crank pedal 42 removed from the rear axle 1
Fit onto the square pillar portions 60 at both ends of 4 and attach the latch 1.
30 is hooked onto the hook 62 and fixed, a unicycle is created as shown in FIG.

Next, operate the tightening lever 143 of the loading platform section 44 to fix the inner tube 140 in the extended state, and raise the latch 120 to release the front wheel section 2, that is, the handle and the head tube, from the trunk structure 34. 22
Connecting portion 1 of the upper end of the inner cylinder 140 to the connecting portion 118 of
42 and hook the hook 112 onto the hook 112 to secure it, a wheeled skate can be created.

The parts that are not used for wheeled skates and unicycles are the body structure 34, as shown in FIG.
Large sprocket gear 39, chain changing device 10
The central part 3 consists of 4 mag.

The bicycle of the above-mentioned embodiment has the latch fittings 95, 11.
6, 120, 130, and 144 can be connected and disassembled by simply hooking and unhooking them by hand without using any tools, and a bicycle can be turned into a unicycle or a wheeled skate.

Note that when assembling a bicycle from wheeled skates and a unicycle, the above-mentioned operations may be performed in reverse.

In the above embodiment, each joint is connected by a latch and a hook, but instead of these latches and hooks, a knock pin is protruded by a spring on the circumferential surface of the stepped pipe-shaped joint. A pin hole may be provided on the peripheral surface of the other joint part into which a knock pin is inserted when the stepped pipe-shaped joint part is joined, or the joint part may be secured by other means such as bolts. The interval may be fixed.

[Brief explanation of drawings]

FIG. 1 is a side view of an embodiment based on this invention;
Fig. 2 is a rear view of the same embodiment, Fig. 3 is a perspective view of the same embodiment, Fig. 4 is an enlarged sectional view of the vicinity of the rear wheel axle of the same embodiment, and Fig. 5 is a schematic diagram of the chain changing device. 6 is an enlarged perspective view showing the shapes of the joint 108 and the rear joint 114. FIG. 7 is an enlarged perspective view showing the shapes of the joint 118 and the front joint 119. FIG. 8 is an enlarged perspective view showing the shapes of the joint 118 and the front joint 119. An enlarged perspective view showing the shape of the crank pedal 42 and the end of the crankshaft 38, FIG. 9 is a side view of a unicycle constructed by recombining the same embodiment, and FIG. 10 is a rear view of the unicycle constructed by recombining the same embodiment. A side view of the wheeled skate thus constructed, FIG. 11 shows the center portion 3 not used for unicycles and wheeled skates.
FIG. {4...saddle, 10...rear fork, 12...rear wheel, 14...rear wheel axle, 100...small sprocket gear, 108...coupling part}1...rear wheel part, {20...handle, 22...head tube, 26... Front fork, 28...front wheel, 118...joint part}2...front wheel part,
{34...Body structure, 38...Crankshaft, 39...Large sprocket gear, 110...Chain, 114...Rear side joint part, 119...Front side joint part}3...Central part, 4
2...Crank pedal, {136...Wheel, 144...
Connecting part}44...Cargo platform part.

Claims (1)

[Claims] 1. Consists of a front wheel part, a rear wheel part, a central part interposed between the front wheel part and the rear wheel part, and a loading platform located behind the rear wheel part, and the front wheel part includes a handle, It consists of a handle post to which this handle is attached, a front wheel, a front fork to which this front wheel is attached, a head tube bearing the handle post and front fork, and a connecting part provided on this head tube, and the rear wheel part teeth,
a saddle, a rear fork extending downward from the saddle, a rear wheel including a rear wheel axle bearing at the lower end of the rear fork and having crank pedal attachment portions at both ends; and a rear fork provided on the rear fork. The central part includes a trunk structure, and a front joint part and a rear joint part which are provided at the front and rear ends of the trunk structure and are detachable from the joint parts of the front wheel part and the rear wheel part, respectively. , a crankshaft which is supported at the lower center of the body structure, has a large sprocket gear, and has crank pedals removably attached to both ends; The loading platform consists of a chain stretched between a sprocket gear and a loading platform, a small wheel bearing a bearing on the loading platform that protrudes downward from the bottom surface of the loading platform, and a small wheel that extends upwardly from the front of the loading platform. A bicycle comprising a neck part which stands upright and has a joint part to the joint part of the front wheel part and a joint part to the rear fork.