JP2020066416A - Split type cable-stayed structure frame - Google Patents

Abstract

To provide a portable split type bicycle frame which is light weight and is compact and is reduced in a storage size in disassembly.SOLUTION: A main pipe and a standing pipe constituting a frame are used as a split structure, its coupling part is held by using a soft member such as a rope having a strong tensile strength and holds a load of a crew member as one or more sets of cable-stayed structures. Coupling and release of the coupling part of the main pulp and the standing pipe is coupled by a seat pillar inserted to a frame for holding a saddle and a seat pin fixing the seat pillar, when the seat pillar is pulled out, the main pipe and the standing pipe are divided or rotatable with the seat pin as a central axis, arrangement in storage of each member is free using flexibility of a fiber and a storage size is reduced.SELECTED DRAWING: Figure 1

Description

The present invention relates to a split bicycle frame which is convenient to carry and can be easily folded, disassembled and reassembled.

Today, there are various types of bicycle usage, and it is often seen that the bicycle is loaded on a car, or stored in a carrying bag or the like, transported to the place of use by train or aircraft, and then reassembled and used there. A variety of folding bicycles and splittable bicycles are provided to cope with this.For example, as a bicycle frame that can be applied to a bicycle having a folding function, a hinge-shaped rotating shaft is provided at a position that is an intermediate portion of the front and rear axles of the frame. Various foldable frames for bicycles that are configured to be foldable by are proposed by, including the invention disclosed in JP-B-37-13506 and the one disclosed in JP-B-63-18560. Japanese Patent Application Laid-Open No. 11-129967 discloses a hinge-shaped rotating shaft as a constituent member of a frame.

  In the folding frame in which the front and rear frames are joined by the hinge-shaped pivot shaft at a position that becomes an intermediate portion of the front and rear axles of such a frame, the front frame and the rear frame are formed of hinges and spindles on the sides. Generally, a structure in which a hinge is provided and fixed by a cam lever from the side opposite to or above and below the hinge.

Utility model announcement Sho 37-13506 Utility model announcement Sho 63-18560 Patent application publication number JP-A-11-268679

A conventional folding frame for a bicycle, which is configured to be foldable by a hinge-shaped rotating shaft, has a problem in portability because the total weight increases in order to secure the strength of a hinge portion and a joint portion.

  An object of the present invention is to provide a portable split-type bicycle frame that is lightweight and compact, and has a small storage size when disassembled.

  In the present invention, the main pipe and the vertical pipe that constitute the frame are divided structures, and one or more sets of cable-stayed structures using flexible and strong tensile members such as ropes are used to hold this joint, and the occupant's load is maintained. This joint holds the cable-stayed structure even at the axis of rotation and the free end.

  The main pipe of this frame and the vertical pipe connecting part are connected and released by inserting the frame to hold the saddle.The seat pillar is connected with the seat pin that fixes it, and when the seat pillar is pulled out, it becomes the main pipe and the vertical pipe. It can be divided or rotated about a seat pin as a central axis, and by utilizing the flexibility of the fiber, each member can be freely arranged at the time of disassembly and storage to reduce the storage size.

In the frame of the present invention, when the seat pillar is removed, it is divided into a main pipe and a stand pipe. For assembly, the seat pillar is inserted through the main pipe and the stand pipe and fixed with seat pins.

The main pipe that can be split and the vertical pipe are connected by a cable rope that connects the main pipe and the vertical pipe, and has a sufficient strength, and the flexibility of the fiber is used to freely arrange the members when disassembling and storing. As a result, it is possible to provide a split-type bicycle that is convenient to carry and can be easily folded, disassembled, and reassembled.

Embodiment

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall side view of a bicycle of the present invention, in which a frame is a head pipe (14) joined to an upper pipe (11) by welding or the like. The front wheel (31) is attached to the front end of the constructed main pipe (1A) and the front fork (15) rotatably fixed to the main pipe (1A), which is normally operated by the handle portion (19) for operating this rotation. Is no different from a bicycle.

The vertical pipe (12) is assembled with the drive unit (4), and the chain stay (16) holding the drive unit (4) and the seat stay (17) are joined by welding or the like to the rear triangle (1B), and the rear wheel is attached to this end. It is no different from a normal bicycle that the vehicle is run by applying the driving force to the rear wheels (32) by depressing the pedal (41) where (32) is fixed.

The frame has a cable-stayed structure composed of an upper pipe (11) and a standing pipe (12) and a rope (13) connecting them. When a cable-stayed bridge has been used as a structure for a long time and the joint is a free end. It is used when the joint does not have sufficient rigidity, and the rope (13) is preferably a high-performance fiber with high tensile strength and low specific gravity, but it can also be a wire rope in which ordinary steel wires are bundled. .

In a normal bicycle, the saddle is fixed to the standpipe by inserting the seat pillar into the standpipe, and in the present invention, the main pipe (1A) and the rear triangle (1B) can be disconnected. The seat pillar (21) is inserted into the rear end of the upper pipe (11) which is divided from below the joint between the stand pipe (12) and the upper pipe (11), and the seat pillar (21) is inserted by the upper seat pin (27). ) Is also provided with a standing seat pin (22) at the upper end of the stand pipe (12), and the seat pillar (21) is inserted into the inner diameter of the stand pipe (12) penetrating the rear end of the upper pipe (11). It

FIG. 4 is a perspective view of the upright seat pin (22) and the upper seat pin (27) to which the seat pillar (21) is fixed. The seat pillar (21) includes the upright seat pin (22) and the upper seat pin (27). ) The screw contracts the diameter to fix it

For the main pipe (1A) and the rear triangle (1B), it is necessary to assemble the frame so that the wheel center planes of the front wheels (31) and the rear wheels (32) are held in the same plane. Since the upper pipe (11) is a part of the structure of the rear triangle (1B) and the upper pipe (11) is a part of the structure of the main pipe (1A), the positions of the stand pipe (12) and the upper pipe (11) are restricted. In addition, a tubular standing sheet ear (23) is joined to the upper end of the stand pipe (12) by welding or the like, and a seat pin plate (24) is joined to the upper pipe (11) by welding or the like to the upper pipe (11). Since the upright seat pin (22) penetrates the seat pin plate (24) and then through the upright seat ear (23) and is fixed by screwing, the upright pipe (12) and the upper pipe (11). Is the vertical seat pin (22) Rotation direction to the position is restricted.

A cylindrical upper seat ear (25) is joined to the rear end of the upper pipe (11) by welding or the like, and the upper seat pin (27) passes through the upper end hole (26) of the seat stay (17). ), The seat stay (17) and the upper pipe (11) are restricted in the rotational direction about the upper seat pin (27).

In FIG. 5, the upper seat pin (27) and the upright seat pin (22) are unscrewed, the seat pillar (21) is pulled out, and the upper seat pin (27) is attached to the upper end hole (26) of the seat stay (17). When pulled out from the main pipe (1A), the rear triangle (1B) is a perspective view of a portion rotated around the standing seat pin (22), and the standing seat pin can be folded as shown in FIG. When (22) is pulled out from the seat pin plate (24), the rear pipe (1B) of the main pipe (1A) separates. This separated state is not shown.

The stand pipe (12) and the upper pipe (11) are inserted and the seat pillar (21) is fixed, and the head pipe (14) of the main pipe (1A) member and the stand pipe of the rear triangular (1B) member are fixed by the rope (13). (12) The lower end is connected to form a cable-stretched structure, a flexible fiber thread and a rope obtained by bundling several of these are used as a frame member, and can be freely arranged when disassembled and stored, and it is lightweight and compact. It is possible to provide a portable split-type bicycle frame that has the smallest storage size when disassembled.

FIG. 3 shows a structure in which ropes are arranged above and below the main pipe (1A) and the two upper and lower cable-stayed structures receive not only the load from above but also the load from before the sudden braking or the like.

An extension standpipe (12A) is rotatably connected to an upper seat pin (27) on an upper part of the standpipe (12), and an upper end of the extension standpipe (12A) and a head pipe (14) of a main pipe (1A) member. The extension standpipe (12A) can be rotated and separated by the same operation as that of the first embodiment in which the upper end of is connected by the upper rope (13B), and the same effect as that of the first embodiment can be obtained.

1 is an overall side view of a bicycle according to a first embodiment of the present invention. The whole side view of the bicycle by folding of the present invention. The whole side view of the bicycle by Example 2 of the present invention. The divided part in Figure 1. FIG. 3 is a perspective view of a divided portion of FIG. 2.

1A Main pipe 1B Rear triangle 4 Drive part 11 Upper pipe 12 Upright pipe 12A Extension upright pipe 13 Rope 14 Head pipe 15 Front hawk 16 Chain stay 17 Seat stay 19 Handle part 21 Seat pillar 22 Upright seat pin 23 Upright seat ear 24 Seat pin Plate 25 Upper seat ear 26 Upper end hole 27 Upper seat pin 31 Front wheel 32 Rear wheel

[0022]
[Brief description of drawings]
FIG. 1 is an overall side view of a bicycle according to a first embodiment of the present invention.
FIG. 2 is an overall side view of the bicycle when folded according to the present invention.
FIG. 3 is an overall side view of a bicycle according to a second embodiment of the present invention.
FIG. 4 is a perspective view of the seat pin divided portion in the state of FIG. 1; FIG. 5 is a perspective view of the seat pin divided portion in the state of FIG.

Claims (2)

In the bicycle frame, the main pipe and the vertical pipe are divided into two parts, and the joint part is divided by the seat pillar and the seat pin that fixes it, and the seat pin is rotatable around the center axis. A frame composed of one or more sets of cable-stretched structures using flexible and strong tensile strength members such as ropes to hold the divided main pipe and vertical pipe joints.

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