JPS58141980A - Folding frame for two-wheel barrow - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a folding frame for a two-wheeled vehicle.

The invention is small and easily foldable, lightweight and convenient for transportation and storage, easy to manufacture and suitable for mass production.
It is also an object of the present invention to provide a folding two-wheeled vehicle that has sufficient strength and durability and can run stably.

The following is an explanation based on the drawings shown as examples of this invention. is a lower pipe, and its rear end is integrally connected to a chain stay 2 formed into two forks.

3 is a vertical pipe support frame, its shape is U with the front side open.
The lower end is welded to the middle of the lower pipe 1, and the outer ends of the upper end are welded to the front end of the back fork 4. The rear end of the back fork 4 is formed into a rear claw 5 and integrally welded to the rear end of the chain stay 20. Therefore, the vertical pipe support frame 3, back fork 4 and chain stay 2 are fixed and welded to the lower pipe l'j integrally in a triangular shape.

6 is a vertical pipe, the lower end of which is rotatably supported forward by the support shaft 7 of the vertical pipe support frame 3, a protrusion 8 is planted on the back side of the vertical pipe, and a locking claw 9 that engages with this is attached to the vertical pipe. It is installed on the support frame 3, and the middle part of the vertical vibro is mounted on the vertical pipe support frame 3. After closely fitting the 0 10 Fi head pipe, engage the locking pawl 9 with the protrusion 8 to support it in place, then attach the bracket) IIY and attach the supporting shafts 12.13' above and below the back! g, and the upper pipe 1 is connected to the upper support shaft 12 and the support shaft 15 arranged across the bracket 14 provided at the middle front side of the vertical vibro.
The front and rear ends of 6 are connected by a shaft, and the lower pipe is connected to the lower support shaft 13! The front end of the head is also connected by a shaft, with a vertical vibro, upper pipe 16 and head pipe 10'l? r: Lower pipe l
and a fixed part of the vertical pipe support frame 3, and are provided in movable parts that are rotatable about their respective shaft supports.

Reference numeral 17 denotes a handle, which is bent from the base end to both sides when folded. 18 is the seat post, 19 is the front wheel, I is the front fork, 21 is the rear wheel, n is the hanger bracket,
This is provided by extending the lower end side wall plates of the vertical pipe support frame 3 downward.

Since the frame of this invention is as shown above, in the assembled state as shown in Fig. 1, the seat post 18 is lowered, and then it is passed to the locking claw 9k (for example, the bracket) Z3 of the vertical pipe support frame 3. When the vertical vibro is released from its engagement with the protrusion 8 against the spring 5, for example, the vertical vibro becomes free, and the vertical vibro is moved around the vertical shaft 7Z by applying force to the saddle, for example. When tilted forward, the upper pipe 16 and the head pipe 1o are rotated and bent around their respective support shafts 13, and the head pipe 10, with the handle 17 attached, is tilted forward as shown in FIG. The wheel 19 is connected to the lower surface of the lower pipe 1. Then, by releasing the handle 17 and bending it backward from the base end, it can be folded compactly as shown. Assembly to running condition can be done extremely easily by following the steps below.

As described above, the frame of this invention includes at least the fixed parts of the lower pipe l and the vertical pipe support frame 3, the vertical vibro whose ends are connected by mutually parallel support shafts, the movable parts of the upper pipe 16 and the head pipe 10. Therefore, by releasing the movable part protrusion 8 from the locking claw 9 of the fixed part and applying force, the entire movable part can be rotated Y, and the upper and lower parts of the lower pipe 1 can be rotated. , the vertical vibro, the upper pipe 16 and the head pipe 10 can be brought close together and folded easily and compactly.

Next, the vertical pipe support frame 3 is welded to the lower vibrator 1, and the vertical vibro, whose lower end is pivotally supported, is fitted into the vertical pipe support frame 3 and held, so the vertical vibro shakes from side to side due to the weight of the pipe. In particular, when the back fork 4, chainstay 2, 2 lower pipe 1, and vertical pipe support frame 3 are assembled in a triangular shape as in the embodiment, sufficient strength and rigidity can be obtained at the fixing part. The movable part is a vertical vibro that is fitted and held in the vertical pipe support frame 3, so that the head pipe 10 and the upper pipe 16 are held in a triangular shape with the side of the lower pipe f and the vertical pipe support frame 3. Compared to a -7< Eve frame that simply serves as both an upper pipe and a lower pipe, it is possible to significantly reduce weight while maintaining sufficient strength and rigidity.

↓The entire frame can be folded into a lightweight and compact size, making it convenient to transport and store.

[Brief explanation of the drawing]

Figure 1 is a side view of the folding bicycle assembled to the frame of this invention; Figure 2 is a side view of the folded bicycle;
FIGS. 3 and 4 are partial explanatory views of the vertical pipe and the vertical pipe support frame in a state corresponding to FIGS. 1 and 2. FIG. ■...lower vibe, 2...chains 7---13...
・Vertical pipe support frame, 4... Back fork, 5...
Rear claw, 6... Vertical pipe, 7... Support shaft, 8... Protrusion, 9... Locking claw, 10... Head pipe, 11.
...Bracket, 12.13...Spindle, 14...
Bracket, 15... Support shaft, 16... Upper pipe,
17...Handle, 18...Seat boss), 19.
...Front wheel, "...Front fork, 21...Rear wheel,
n...hanger bracket 0 Applicant: Miyata Kogyo Co., Ltd. Agent, Kan. Ohga, Masayoshi Masuda Procedural Amendment (voluntary) September 1980 - Σ (Japanese Patent Office Commissioner Kazuo Wakasugi 1. Indication of the case 1988) Patent Application No. 22829 2, Title of the invention: Folding frame for two-wheeled vehicles 3, Relationship to the case of the person making the amendments: Application: Name: Miyata Kogyo Co., Ltd. 4, Agent: 5 Date of amendment order: Initiator 6. Number of inventions increased by amendment 07. Subject of amendment Description 8. Contents of amendment Attachment circular (1) The claims on page 1 of the specification are amended as follows. 2. Claims A lower pipe and a chainstay are integrally connected, and a fixed part is provided between the lower pipe and the chain stay, which is erected together with a vertical pipe support frame, and supports the head pipe, the upper pipe, and the vertical pipe. A movable part is connected to an Eri link to the shaft, and has one end of the lower part of the head pipe attached to the front end of the lower vibe, and the other end of the lower end of the vertical pipe attached to the vertical pipe support. The movable part is foldable by rotating vertically with respect to the lower pipe direction of the fixed part, and the vertical pipe is held in place by fitting and engaging with the vertical pipe support frame. A folding frame for two-wheeled vehicles. Applicant: Miyata Kogyo Co., Ltd. Agent: Kan Oga, Masayoshi Masuda

Claims (1)

[Claims] The lower frame and two-pronged chainstay are integrally connected,
In between, there is a fixed part in which a vertical pipe support frame is integrally installed, and the head pipe, upper pipe, and vertical pipe are connected to the link by a support shaft, and the lower back of the head pipe is connected to the front end of the lower pipe, and the lower end of the vertical pipe is connected to the link. The movable parts are pivoted to the vertical pipe support frame, and the movable parts can be freely folded by rotating the lower pipe up and down of the fixed part, and the vertical pipe can be fitted and engaged with the vertical pipe support frame. A folding frame for a two-wheeled vehicle, which is characterized by being worn and held in place.