JPS5814356B2 - bicycle folding device - Google Patents

Description

[Detailed Description of the Invention] This invention allows bicycles (including motorized bicycles) to be folded from the center of the tenon, and to fold the front and rear wheels a thousand times.
This relates to a bicycle folding device whose purpose is to prevent clothes, shoelaces, etc. from getting tangled with the hinge device of the frame when riding.

Various structures have been proposed for conventional bicycle folding devices, and some are in practical use, but in general, when folding, the front and rear wheels become V-shaped (i.e., the wheels are not parallel). There were problems that needed to be improved, such as the structure being suitable only for small diameter wheels.

However, in this invention, the butterfly plates of the front and rear frames are made wide so that even large-diameter wheels can be folded parallel to each other, and protective frames are provided on the upper and lower edges of the butterfly plates to prevent clothes from getting tangled. The above-mentioned conventional problems have been solved.

As mentioned above, if the width of the butterfly plate was increased, the wheels could be folded parallel to each other, but the overhanging part of the butterfly plate would cause the edges of pants to get tangled when riding, making it inconvenient to use. It is presumed that it has not yet been put into practical use.

In addition, conventional fixing hinges often relied on regular bolts and nuts, which required tools such as spanners to attach and remove them. In addition, since the elastic plate is clamped to prevent loosening, the possibility of the hook loosening during riding and resulting in poor tightening is prevented.

That is, to explain this invention by way of example, a front wheel 1 is mounted on the lower end of a front fork 2 to rotate on a horizontal axis 3, a head pipe 4 is fitted to the upper part of the front fork 2, and a front fork The upper end of 2 fixes the handle 5.

The head pipe 4 is lowered and the upper end of the front frame 6 is fixed obliquely, and the lower end of the front frame 6 extends toward the rear wheel while keeping a gentle slope. It sticks vertically.

The rear wheel 8 is attached to the rear end of the rear fork 9 through a horizontal shaft 10, the rear wheel 8 and the horizontal shaft 10 are fixed, and the horizontal shaft 10 and the rear fork 9 are rotatable. The rear frame 12 is obliquely fixed between the upper end of the auxiliary fork 11 and the front part of the catcher fork 9, and the mounting rod 14 of the seat 13 is fixed to the upper end of the rear frame 12 so as to be able to move up and down. A crank 15 with a lower end bent horizontally and a gear 16 fixed to the horizontal portion 12a is horizontally rotatably installed, and a crank 11 is installed between the gear 16a fixed to the horizontal shaft 10 and the gear 16.
In the figure, 18 and 18a are petals, 19 is a tightening rod for the mounting rod 14, and 20 is a leg rod whose upper end is rotatably attached to the lower end of the front frame 6.

In the above embodiment, the hinged ends of the front and rear frames 6, 12 are vertically fixed to the U-shaped plates 7, 1a, respectively;
One vertical edge of the plates 1 and 1a is rotatably hinged, and the plates γ
A locking groove 21 is provided on the other side edge of the other plate body 7a, a screw locking rod 22 is rotatably attached to the other side edge of the plate body 7a, and a screw tube 23 with a nondle is screwed into the screw locking rod 22. An elastic plate 24 made of synthetic resin or rubber is adhered to the opposing surfaces of 7 and 1a.

Next, other examples of butterfly plates will be explained below.0 plate bodies 25 and 2
One vertical edge of the plate 25a is rotatably screwed, a hook 26 is fixed to the other vertical edge of the plate 25, and a hook 28 with a nondle 27 is attached to the other vertical edge of the other plate 25a. At the proximal end of the handle 27, a hooking piece 29 is connected to the inner side of a hanging ring 28, and the elastic plate 30 between the plates 25 and 25a is sandwiched between the plates 25 and 25a. The upper and lower edges of the upper and lower edges of one plate 7a:25a of the butterfly plate of each of the above embodiments are the same as those of the embodiments.The protective frames 31, 31a, and 3
2 and 32a are provided.

The nondle 21 can be easily operated by tilting it slightly (for example, about 45 degrees in the direction of arrow 33) from the tightened state, so that the latch hook and the latch piece can be easily removed. It's happening.

Furthermore, by bending the upper and lower edges of the plates 7, 1a 25, and 25a at right angles, the cross-sectional strength of the plates 7, 1a 25, and 25a can be significantly increased.

In the above embodiment, the front frame and the rear frame are hinged, but the difference in frame structure is that the frame C is anchored at the middle part of the front frame, or hinged at the rear frame side. Or, there may be cases where the main frame and the auxiliary frame are folded in two places.
In any case, it is within the scope of the present invention that the butterfly plate is widened to allow the wheels to be folded in a thousand rows, and a protective frame is provided.In addition, the leg rods are moved toward the front frame side. By folding it, there is less risk of it getting in the way, and the front part can be stably held as a stand when folded.

That is, according to this invention, the plates of the hinge portions of the front and rear frames are formed wide enough to allow the wheels to be folded a thousand rows, and a protective frame is provided, which provides excellent stability when folded. In addition to being able to be folded into a relatively small volume, there is no risk of the board getting tangled with clothing when riding, and there are various advantages such as the ability to fold a bicycle with large diameter wheels.

Further, no tools are required for tightening or fixing the butterfly plate, and the assembly is more reliable due to relatively simple operation.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention in an assembled state;
Figure 2 is a front view of the folded state, Figure 3 is a partially enlarged perspective view of the butterfly plate opened, Figure 4 is an enlarged plan view with the protective frame omitted, and Figure 5 is the same closed state. Figure 6 is a partially enlarged front view with the leg rods upright, Figure 1 is a side view, and Figure 8 is a butterfly plate of another embodiment. FIG. 9 is a partially enlarged perspective view of the device in the open state, and FIG. 9 is a partially enlarged plan view of the device in the closed state with the protective frame omitted. 1...Front wheel, 2...Front fork, 3...Horizontal shaft, 4...Head pipe, 5...Handle, 6 ...Front frame, γ, 7a ... Plate body, 8 ... Rear wheel, 9 ... Rear fork, 10 ... Horizontal Axis, 11... Auxiliary fork, 12...
・Rear frame, 13... Seat, 14...
...Mounting rod, 15...Crank, 16, 16a
...Gear, 17...Chain, 18,
18a...petal, 19...tightening nondle, 20...leg rod, 21...latching groove, 22...screw rod, 23... Spiral tube with handle, 24... Elastic plate, 25, 25a...
... Plate body, 26 ... Latch hook, 27 ...
Nondle, 28... Hanging ring, 29... Hanging piece, 30... Elastic plate, 31, 31a, 32,
32a...Protection frame.

Claims (1)

[Scope of Claims] 1. The rear end of the front frame that supports the front wheels and the front end of the rear frame that supports the rear wheels are hinged by a butterfly plate with a width that can be folded parallel to each other, Bicycle folding device 02 characterized in that the opening and closing ends of the butterfly plate are removably hooked, and the butterfly plate is provided with a protective frame for clothes. 2. The bicycle folding device according to claim 1, wherein the bicycle folding device is vertically installed at a connection portion at an end of the frame. 3 Bicycle folding device according to claim 1, characterized in that the protective frame is provided in an arc shape at the upper and lower edges of the upper and lower edges of the butterfly plate with a slight distance between them. The plates are fixed vertically to the ends of the frame, one vertical edge of each plate is rotatably hinged, a groove is provided for the other vertical edge of one plate, and the other plate is 2. The bicycle folding device according to claim 1, wherein a side vertical edge retaining rod is attached to clamp the elastic plate on the opposing surface of the plate body. 5 One vertical edge of the two plates constituting the butterfly plate is rotatably hinged, a hook is provided on the other vertical edge of one plate, and a hook is provided on the other vertical edge of the other plate. 2. The bicycle folding device according to claim 1, further comprising a handle ring which is hooked to said hook.