JPH086704Y2 - Foldable bicycle - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a foldable bicycle which is compact when folded and which is easy to fold and unfold.

[Prior Art] Bicycles are an economical means of transportation that has been used since ancient times.
Although its shaping has continued to improve with the passage of time, its basic principles and construction are still unchanged, including one fixed chassis and front and rear wheels. In addition, a bicycle cannot run without pedaling with a foot. Therefore, bicycles are also commonly used as a kind of outdoor exercise equipment, and this phenomenon is especially prominent in modern times. Therefore, the bicycle has become one of the most popular outdoor exercise equipments in modern times, as one of the transportation means of the past.

Although the bicycle is light, its volume still feels too large, which makes it inconvenient to store and transport. Especially, when carrying, exporting, or long-distance transportation of a bicycle, the large volume of the bicycle always causes a considerable bottleneck in terms of transportation cost.

Therefore, when the bicycle is not in use, it can be folded to reduce its volume, thus reducing the storage space.
A foldable bicycle has also been proposed for convenience of transportation. Hereinafter, a schematic configuration of a conventional folding bicycle will be described with reference to two examples (1) and (2).

(1) As shown in FIGS. 8-1 and 8-2, the lower pipe 101 is connected to the lower end of the vertical pipe 100, and the lower pipe 101 is connected to the lower pipe 101.
The front pipe 102 is connected to the tip of 101, the above-mentioned lower pipe 101 is divided into front and rear, and the pipe before division 101a and the pipe after division 10
1b and 1b are foldably connected to each other in an inverted V shape, and a first locking mechanism 103 for holding the pre-split pipe 101a and the post-split pipe 101b in a linearly extended state is provided at the connecting portion, and the pre-split pipe 101a is provided. And the front pipe 102 are connected so as to be foldable in a direction in which they can be overlapped, and the front pipe is connected to the connecting portion.
A second lock mechanism 104 for holding the undivided pipe 102 and the pre-split pipe 101a in an expanded state (see Japanese Utility Model Application No. 62-15689).

(2) As shown in FIGS. 9-1 and 9-2, the front frame 111 having the head portion 110, the back hawk 112,
A rear frame 114 having a chain star 113, a vertical pipe 115 is supported near the hanger 117 so as to be swingable in the front-back direction, and the front frame 111 and the vertical pipe 115 are connected together
The front frame 111 and the end of the main pipe 119 fixed to the hanger 117 are swingably connected to each other, and the standing pipe 115 is engaged near the upper end of the back hawk 112. A device that can be fixed by being stopped (see Japanese Utility Model Application No. 60-54252).

[Problems to be Solved by the Invention] However, in the folding bicycle of (1) above, the handle pipe 105 and the standing pipe (seat supporting pipe) 100 are not foldable, and the lower pipe 101 has an inverted V shape. Since the structure is folded, there is a problem that there is little overlap between the lower pipe 101 and the wheel during folding (Fig. 8-2), and the height of the vehicle body does not become particularly small at the time of folding, so that the vehicle cannot be made compact. No specific configuration for folding the pedal is disclosed.

In addition, it is necessary to operate the two lock mechanisms 103 and 104 to perform the folding operation and the opposite unfolding operation, which is troublesome.

In the foldable bicycle of the above (2), the handlebars and pedals cannot be folded, the front frame 111 is connected to the head portion 100 in an unfoldable manner, and the standing pipe 115 is attached to the back hawk 112 with one locking portion 120. Although it is a simple structure to lock, the distance between the front and rear wheels does not change much when folded, so the length of the car body does not become particularly small and it can not be said that it will be fully compact. is there.

The present invention has been made in view of the problems of the above-mentioned respective prior arts, and in addition to the main frame (front frame and rear frame) of the vehicle body, the seat support shaft, the handlebar pipe, the pedal, and the like are all provided. A foldable fulcrum is provided, and when the bicycle is folded, its height and length dimensions are made sufficiently small to make it compact, and at the same time, folding and unfolding operations can be performed quickly, and traveling safety The purpose is to provide a foldable bicycle that does not impair the sex.

[Means for Solving the Problems] A foldable bicycle according to the present invention for achieving the above object includes one handlebar mechanism, one front frame,
It consists of one rear frame, one seat mechanism, one safety lock mechanism, and one foldable pedal mechanism. One handlebar mechanism is one fit pipe), one fork, It is composed of two foldable handlebars, and the fork is connected to the lower end of the fitting pipe, and the front wheel is erected by the fixing hole provided at the end of the fitting pipe. A side fitting tube is provided, and a foldable handlebar is connected to the upper end of the fitting tube. The two handlebar pipes of this handlebar are respectively inserted into the left and right C-shaped cross-section pipes, and It is fixed with a ring, the fit ring is divided into an outer fit ring and an inner fit ring, and one recess is formed between the outer fit ring and the inner fit ring, and when the fit ring and the C-shaped section pipe are connected, Just cut off The front end of the surface C-shaped pipe and the recess are joined together,
When folding the handlebar, first pull up the ferrule upward to separate it from the recess, and after that, the handlebar pipe is a fulcrum that axially connects the handlebar pipe and the C-section pipe along the pipe notch of the C-section. The front end of one front frame is connected to each other by a lower ferrule and a pin of the ferrule of the handlebar mechanism, and the front end of one rear frame is Connected so that it can be folded in a V-shape above the intersection of the front frame and the two wheels,
A rear wheel is installed at the rear end, and one seat mechanism includes one seat, one seat support shaft, a seat auxiliary shaft, and a front support shaft, and supports the seat at one end of the seat support shaft, The other end is frame-joined to one activity fulcrum, one end of the seat auxiliary shaft is rotatably connected to the seat support shaft to support the seat support shaft, and the other end is frame-jointed to the activity fulcrum of the front frame. One end of the front support shaft is frame-jointed to the activity fulcrum of the seat auxiliary shaft, and the other end is frame-connected to the upper fitting ring of the fitting ring by a pin.One safety lock mechanism is one brake fork. And a safety lock provided at the bottom of the rear end of the front frame and a safety fork lock provided at the lower end of the front end of the rear frame. And after frame Are connected in an unfolded state, and the upper part of one brake fork forms a flat plane of the brake fork.When this brake fork becomes vertical, the safety fork of the rear frame is pushed up by the brake fork plane, And the safety lock of the front frame are disengaged and separated so that the folding operation can be performed.One foldable pedal mechanism consists of two foldable left and right foldable pedals, one chain wheel shaft. Core, consisting of one pedal wheel shaft, the pedal wheel shaft is located above the rear frame, the chain wheel shaft center penetrates the pedal wheel shaft, and the two left and right foldable pedals are fixed on the same shaft It is characterized by doing.

[Operation] In the present invention configured as described above, the safety fork lock and the safety lock are engaged with each other when the bicycle is deployed (the vehicle is in a travelable state), and the bicycle is in the deployed state (the vehicle is in a travelable state).
Held in.

When folding a bicycle, raise the brake fork and make the brake fork plane horizontal, and the brake fork plane pushes up the safety fork lock, where
The user holds the handle lever and pulls the front frame slightly through the handle lever so that the safety lock separates from the safety fork block via the notch in the plane of the brake fork. As a result, the front frame and the rear frame are folded in a V shape at their connecting portions (rolling wheels) so that the front and rear wheels approach each other, and at the same time, the fit pipe having the forks and the seat support shaft are respectively different from the front frame and the rear frame. Then, it rotates rearward, and the length and width dimensions are sufficiently reduced.

When the handlebar is folded, the ferrule is pulled up and the handlebar pipe is rotated downward along the notch of the C-shaped cross-section with the fulcrum as the center of rotation.

Furthermore, the pedal is rotated around the long nail bar as a fulcrum to fold it.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of an embodiment of the folding bicycle according to the present invention, FIG. 1-1 is a side view of the folding bicycle according to the present invention when the bicycle is unfolded (running state), and FIG. It is a side view of the state where the foldable bicycle shown in the figure was folded.

(Handle bar mechanism) The wheel shaft 2 of the front wheel 1 is fixed to the fixing hole 4a of the fork 3 or
It is fixed at the 4b position to allow for rims of various sizes. A ferrule 5 is connected above the fork 3, and a handlebar is further connected to the upper side of the ferrule 5. The handlebar is one foldable handlebar and its mechanism is two handlebar pipes 7,7 as shown in FIG.
Are respectively inserted in the C-shaped pipes 8, 8 and are fixed by the ferrule 9.

As shown in FIG. 2-1, the connecting portion of the fitting ring 9 has one recess 10 between the outer fitting ring 9a and the inner fitting ring 9b, and once joins the fitting ring 9 and the C-shaped pipe 8 in cross section. Then, just section C
The front end of the shaped pipe 8 is joined together with the recess 10. Second
As shown in FIG. 2, the lower end portion of the handlebar pipe 7 is rotatably supported by the C-shaped cross-section pipe 8 via a fulcrum 11. Therefore, when the handlebar is folded, the handlebar pipe 7 is rotated downward along the notch 8a of the C-shaped pipe 8 in FIG. 2 with the fulcrum 11 (FIG. 2-2) as the center of rotation. . The state after folding is as shown in FIG. 2-2.

(Seat Mechanism) Further, referring to FIG. 1, an upper fitting ring 6b and a lower fitting ring 6a are provided at the upper and lower ends of the fitting ring 5, respectively.
6a is provided with one cutter pin 12 to connect the fitting ring 5 and the front frame 14a, and the other upper fitting ring 6b is also similarly provided with one cutter pin 13 so that the front support shaft 15 is provided. They are connected. The seat 17 is supported by one end of the seat support shaft 21, and the other end is frame-jointed to the activity fulcrum 28 of the rear frame 14b. One end of the seat auxiliary shaft 16 is rotatably connected to the seat support shaft 21, and the seat is supported. The support shaft 21 is supported, and the other end is frame-joined to the activity fulcrums A and B of the front frame 14a. Front support shaft 15
One end of the frame is connected to the activity fulcrums C and D of the seat auxiliary shaft 16, and the other end is joined by the cutter pin 13 to the upper fitting ring 6b of the fitting ring 5.
The frame is connected to. One rear-rolling support shaft inner shaft 18 that supports the seat 17 is inserted into the support shaft outer shaft 20 of the seat support shaft 21. Therefore, the seat 17 can be moved up and down,
The height of the seat 17 is appropriately adjusted and the seat 17 is fixed by the volume 19. One pedal wheel shaft 22 is fixed to the upper position of the rear frame 14b, and the chain wheel shaft center 22a is passed therethrough. In the chain wheel shaft center 22, the front chain wheel 23 and the pedals 24a and 24b on both sides are set on the same rotary shaft. The wheel shaft of the rear wheel 26 is connected to the end of the rear frame 14b, and the rear chain wheel 25 and the rear wheel 26 are set on the same rotary shaft by the shaft center bar 27, and the rear chain wheel is used.
25 is rolled by the front chain wheel 23.

The connection between the front frame 14a and the rear frame 14b adopts an active connection, so that the rotary shaft 14 as a rolling wheel provided at the upper part and a safety lock mechanism described later provided at the lower part are connected to the front frame 14a and the rear frame. The frame 14b is connected. The bottom of the rear frame 14b further has one brake fork 50, and this brake fork 50 allows the user to stably stop the vehicle body. Separately,
By the operation of the brake fork 50, the rear frame 14b
The safety lock mechanism at the joint of the bottom of the front frame 14a is separated, and the rear frame 14b and the front frame 14a are combined so that the rotary shaft 14 can be folded into a V-shape about the rotary shaft.

(Regarding the pedal mechanism) The pedals 24a, 24b on both the left and right sides of the present invention also have a single foldable structure.
a can be folded 90 degrees towards the pedal lock arm 35. The folding structure described above reduces the volume occupied by the present invention after folding, and the structure after folding is as shown in FIG. 4-1.

FIG. 4 is a folding mechanism diagram of the pedal 24a of the present invention. The pedal 24a crosses the rotary plate 31 with one long nail bar 30,
Both are combined together. The rotary plate 31 is engaged with the support shaft 33 fixed on the pedal lock arm 35 by one bearing 32, and the action of the bearing 32 allows the rotary plate 31 to rotate freely, and at the same time, the pedal 24a is One notch 34
Therefore, it can be folded upward (as shown in FIG. 4-1) about the long nail bar 30 as an axis. Where the support shaft 33 and the rotating plate 31 are connected, a bearing 32 is used to connect them, thereby adding the rotational sensitivity of the pedal 24a, and more importantly, the pedal 24a uses the rotating plate 31 as a support. That is, the rotary plate 31 uses the support shaft 33 as a support point. Further, the support point (that is, the position of the support shaft 33) is located above the center of gravity of the rotary plate 31, and the upper end of the rotary body 31 has a convex shape. As shown in the figure, the balance is in the equilibrium state and never tilts or inverts.
Of the upper surface 29) can be held in an upward state. That is, the pedal surface can be kept in a horizontal plane. This is the feature of the present invention.

(Safety Lock Mechanism) Another feature of the present invention is a folding mechanism of the main frame, which mechanism can be understood by referring to FIGS. 1 and 3. The one shown in Fig. 1 is in an unfolded state,
The front frame 14a and the rear frame 14b are connected to a safety lock mechanism provided below the rotary shaft 14, and therefore have generally the same use effect as a bicycle. When attempting to fold the brake fork 50, as shown in FIG.
At this time, the brake fork plane 50a of the brake fork 50 pushes up the safety fork lock 51 against the elastic force of the spring 54, which will be described later, so the user pulls the handlebar part forward and backward. When applied to the front frame 14a, the safety lock 52 is separated from the safety fork lock 51 through the notch 50b of the brake fork plane 50a, and the main beam bar (consisting of the front frame 14a and the rear frame 14b) is formed into a V shape. It can be folded.

When deploying and locking the main beam bar, press down the front frame 14a anew via the handlebar, and use the safety lock 52 to insert the notch 50b in front of the brake fork plane 50a to ensure safety. The lock 52 and the safety fork lock 51 are localized in a standby connection state. At this time, the safety fork lock 51 and the safety lock 52 are tightly coupled only by pulling up the brake fork 50, and the coupled state is as shown in FIG. 5-1.

By the safety lock mechanism as described above and the rotating body 14 connected between the front frame 14a and the rear frame 14b, the front frame 14a and the rear frame 14b can be folded in a V shape,
Can be deployed and locked.

The safety lock mechanism includes one brake fork 50 and one safety lock 52 provided at the bottom of the rear end of the front frame 14a.
And a safety fork lock 51 provided below the front end of the rear frame 14b. The safety fork lock 51 is fixed to one end of a safety cutter pin 55 provided in one fork lock shell 53. The spring 54 is provided inside the fork lock shell 53 and wound around the safety cutter pin 55, and suspends and supports the safety fork lock 51 and urges it downward.

The front end of the safety folk lock 51 has two convex blocks 51a,
With 51b. One concave portion 51 is provided between the biconvex blocks 51a and 51b.
The front side of this concave portion 51d forms one inclined surface 51c to the rear side, and the shape of the safety lock 52 is also one convex block shape. One inclined convex block 5 that can be engaged with the concave portion 51d of 51
It has a safety lock 52 and has a reverse hook-like mechanism at the front end. Once the safety fork lock 51 and the safety lock 52 are coupled, the inclined beveled convex block 52a on the front side of the safety lock 52 hooks the one inclined surface 51c of the safety fork lock 51 and the spring 5 in the fork lock shell 53.
4 elasticity, safety fork lock 51 and safety lock 52
Bind tightly. When the folding operation is performed, the safety fork lock 51 and the safety lock 52 can be separated by pushing up the biconvex blocks 51a, 51b of the safety fork lock 51 with the brake fork plane 50a.

FIG. 7 shows another embodiment of the pedal wheel shaft in the present invention. Pedal wheel shaft 22 shown in FIG.
Is welded directly onto the rear frame 14b. In the example shown in FIG. 7, the pedal wheel shaft 22 is vertically movable with respect to the rear frame 14b. That is, the pedal wheel shaft 22 is supported by one support frame 62 and is connected to one U-shaped iron 61 on one side of the support frame 62 by a fitting method (see FIG. 7-2). And U-shaped iron
61 is fixed to the inner space surrounded by the four front support shafts 65 of the rear frame 14b. The other end of the pedal wheel shaft 22 is also connected to one iron piece 63. This iron piece 63 is obtained by vertically folding and connecting and fixing an iron piece 64 of a similar structure at an appropriate position on the seat support shaft 21. One U-shaped iron 60 on the bottom of the seat support shaft 21.
And the U-shaped iron 60 is fixed to the inner space surrounded by the four support shafts 65 on the rear side of the rear frame 14b.

When the vehicle body is folded based on the overall structure described above, the pedal il shaft 22 and the pedals 24a, 24b are raised, and the storage volume is further reduced by the amount of the pedals 24a, 24b. As a result, the folding space can be effectively utilized, and the folded bicycle can be made more compact. On the other hand, when the vehicle body is deployed, the pedal wheel shaft 22 is just hung on the upper support shaft 65 of the rear frame 14b, and safety is not impaired when the entire vehicle body is used.

The folding operation procedure of the folding bicycle described above is high speed, simple, and safety requirements are reached even when traveling, and such a folding structure is unprecedented, and its good design is Much more than any other commonly used folding bike. It can only be said that it is very novel and advanced, and besides the above, the mechanism is only a better embodiment of the present invention, and various structural changes or other equivalent effect embodiments made by mediocre Is
Of course, they should be included within the spirit or scope of the present invention.

[Effects of the Invention] Since the present invention is configured as described above, it has the following effects.

The invention according to claim 1, when folding the bicycle,
The front frame and the rear frame are folded in a V-shape at their connecting portions, and the fit pipe having the fork and the seat support shaft rotate rearward with respect to the front frame and the rear frame, respectively, and the handlebar Since the pedals and pedals can also be folded, the height and length dimensions of the vehicle body when folded are extremely short, resulting in a compact body.

Further, at the time of folding and unfolding, all that is required is to move the brake fork and engage or disengage the safety fork lock and the safety lock, so that the folding and unfolding operations can be performed quickly, and it does not take time and effort.

According to the second aspect of the invention, the safety lock mechanism can be made compact and the folding and unfolding operations of the front frame and the rear frame can be reliably performed.

According to the third aspect of the invention, the pedal surface of the pedal can always be kept horizontal when the vehicle body is deployed, and the foot can be easily placed on the pedal again even if the foot is released from the pedal during traveling.

According to the invention as set forth in claim 4, the pedal wheel shaft and the pedal are raised during storage, the storage volume is further reduced by the amount of the pedal, and the pedal wheel shaft is hung on the rear frame at the time of unfolding. Not damaged.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the folding bicycle according to the present invention. FIG. 1-1 is a side view of the foldable bicycle of the present invention when the foldable bicycle is unfolded (runnable). FIG. 2 is a perspective view of the handlebar mechanism portion of the present invention. FIG. 2-1 is an exploded view of FIG. FIG. 2-2 is a perspective view of the present invention after the handlebar is folded. FIG. 3 is a side view of the folding bicycle shown in FIG. 1 in a folded state. FIG. 4 is a perspective view of the pedal of the present invention when it is deployed. FIG. 4-1 is a perspective view of the pedal of the present invention in a folded state. FIG. 5 is a perspective view of the folding operation unit according to the present invention when the bicycle is folded. FIG. 5-1 is a perspective view of the folding operation portion of the present invention when the bicycle is deployed (running possible state). FIG. 6 is a perspective view of a safety lock mechanism (safety lock and safety fork lock) according to the present invention. FIG. 7 is a side view of a support structure for a pedal wheel shaft according to another embodiment of the folding bicycle of the present invention. FIG. 7-1 is a diagram showing a state in which the bicycle is folded from the state shown in FIG. 7-2 is an enlarged perspective view of the U-shaped iron and support shaft in FIG. 7. FIG. 8-1 is a side view of the conventional folding bicycle when the bicycle is unfolded, and FIG. 8-2 shows a state when the bicycle is folded. FIG. 9-1 is a side view of another conventional folding type bicycle when the bicycle is unfolded, and FIG. 9-2 shows a state of folding the bicycle. Explanation of code 1 …… Front wheel 2 …… Wheel shaft 3 …… Fork 4a, 4b …… Fixing hole 5 …… Fit tube 6a …… Lower fitting tube 6b …… Upper fitting tube 7 …… Handle bar pipe 8… … C-shaped section pipe 8a …… Notch 9 …… Fitting ring 9a …… Outer fitting ring 9b …… Inner fitting ring 10 …… Concave 11 …… Support point 12,13 …… Cutter pin 14 …… Rotating shaft 14a …… Front Frame 14b …… Rear frame 15 …… Front support shaft 16 …… Seat auxiliary shaft 17 …… Seat 18 …… Support shaft inner shaft 19 …… Volume 20 …… Support shaft outer shaft 21 …… Seat support shaft 22 …… Pedal Wheel shaft 22a …… Chain wheel shaft center 23 …… Front chain wheel 24a, 24b …… Pedal 25 …… Rear chain wheel 26 …… Rear wheel 27 …… Axial bar 28 …… Activity fulcrum 29 …… Upper end surface (pedal 30) Long nail bar 31 ... Rotating plate 32 ... Bearing 33 ... Spindle 34 ... Notch 35 ... Pedal lock arm 50 ... Brake four 50a …… Brake fork plane 50b …… Notch 51 …… Safety fork lock 51a, 51b …… Convex block 51c …… One inclined surface 51d …… Concave 52 …… Safety lock 52a …… Inclined convex block (inclined cam block) 53 …… Forklock shell 54 …… Spring 55 …… Safety cutter pin 60,61 …… U-shaped iron 62 …… Support frame 63,64 …… Iron piece 65 …… Support shaft A, B …… Activity fulcrum C , D …… Activity fulcrum

Claims (4)

[Scope of utility model registration request] 1. A handlebar mechanism, a front frame (14a), a rear frame (14b), a seat mechanism, a safety lock mechanism, and a foldable member. One handlebar mechanism is composed of one fitting tube (5), one fork (3) and one foldable handlebar, and a fork is attached to the lower end of the fitting tube (5). (3) is connected, and the fork (3) has the front wheel (1) erected by the fixing holes (4a) and (4b) provided at the ends,
An upper fitting pipe (6b) and a lower fitting pipe (6a) are provided at both ends of the fitting pipe (5), and a foldable handlebar is connected to the upper end of the fitting pipe (5). The two handlebar pipes (7) and (7) are inserted into the two left and right C-shaped pipes (8) and (8), respectively, and are fixed by fitting rings (9). (9)
Is divided into an outer ring (9a) and an inner ring (9b), and one recess (10) is formed between the outer ring (9a) and the inner ring (9b) to form a ring (9). When the C-shaped cross-section pipe (8) is joined, the front end of the C-shaped cross-section pipe (8) and the recess (10) are joined to each other, and the handle bar is first pulled upward when the folding operation is performed. The handlebar pipe (7) and the section C-shaped pipe (8) are separated along the notch (8a) of the section C-shaped pipe (8) after separating from the recess (10). Shaft-supported fulcrum (1
1) is configured to rotate downward about the center of rotation, and the front end of one front frame (14a) has a lower fitting ring (6a) and a pin (12a) of the fitting ring (5) of the handlebar mechanism. ), The front end of one rear frame (14b) is connected to the front frame (14a) from one rolling wheel (14) above the intersection of the two so as to be foldable in a V shape and connected to the rear end. Has a rear wheel (26) installed therein, and one seat mechanism includes one seat (17), one seat support shaft (21), seat auxiliary shaft (16), and front support shaft (15). The seat (17) is supported by one end of the seat support shaft (21), and the other end is frame-joined to the activity fulcrum (28) of the rear frame (14b). One end of the seat auxiliary shaft (16) is seat supported. The seat support shaft (21) is rotatably connected to the shaft (21) to support the seat support shaft (21), and the other end thereof is an activity fulcrum (A,
B) is connected to the frame. One end of the front support shaft (15) is connected to the activity fulcrum (C, D) of the seat auxiliary shaft (16), and the other end is fitted with a pin (13) to the ferrule (5). The upper fitting ring (6b) is frame-jointed, and one safety lock mechanism is connected to one brake fork (5b).
0), a safety lock (52) provided at the bottom of the rear end of the front frame (14a), and a safety fork lock (51) provided below the front end of the rear frame (14b). Safety lock (5) on (51) and front frame (14a)
2) can be hooked, the front frame (14a) and the rear frame (14b) are connected in an expanded state, and the upper part of one brake fork (50) forms a flat brake fork plane (50a). , When this brake fork (50) becomes vertical, push up the safety fork lock (51) of the rear frame (14b) with the brake fork flat surface (50a), and the safety lock of the safety fork lock (51) and the front frame (14a) ( 52) It is configured to be disengaged from and disengaged from each other, so that the folding operation can be performed. One foldable pedal mechanism consists of two foldable left and right foldable pedals (24a), (24b), one It consists of the chain wheel shaft center (22a) and one pedal wheel shaft (22), the pedal wheel shaft (22) is located above the rear frame (14b), and the chain wheel shaft center (22a) is the pedal wheel shaft. Go through (22) And, two left and right of the variable folding of the pedal (24
A foldable bicycle characterized in that a) and (24b) are fixed on the same axis. 2. The safety folk lock (51) is fixed to one end of a safety cutter pin (55) provided in one folk lock shell (53), and the folk lock shell (53) is attached to the rear frame (53). 14b) is fixed to the bottom on the front end side and is provided inside the fork lock shell (53) and has a safety cutter pin (5
The safety fork lock (51) is biased downward by one spring (54) wound around the safety fork lock (5).
1) has two convex blocks (51a) and (51b) at the front end, and one concave portion (51d) is formed between the two convex blocks (51a) and (51b). ) Has a slope (51c) to the rear, while the front end of the safety lock (52) of the front frame (14a) also engages with the slope (51c) of the safety lock lock (51). The foldable bicycle according to claim 1, wherein the foldable bicycle has a slanting convex block (52a) which can be fitted, and has a safety lock (52) to form a reverse hook-like mechanism at a front end. 3. The left and right foldable pedals (24a), (24b) of the foldable pedal mechanism each have one long nail bar (30), one rotating plate (31), and one pedal lock. Supported by the arm (35), the rotary plate (31) is placed inside the pedal (24a), and the long nail bar (30) is used to traverse the rotary body (31), and both are integrated into one. The rotating body (31) is connected to the pedal lock arm (3) by means of a bearing (32) and a support shaft (33).
5) and the pedal (24a) is connected to the pedal lock arm (3
One notch (34) is provided on one side closer to 5), and the pedal (24a) is adapted to be folded upward at an angle of 90 degrees around the long nail bar (30) as an axis. (31) has a convex upper end, and the position of the support shaft (33) is biased to a position higher than the center of gravity of the rotating plate (31), and the pedal surfaces of the pedals (24a) and (24b) are The foldable bicycle according to claim 1 or 2, which is horizontal. 4. The pedal wheel shaft (22) is supported by one supporting frame (62), and is connected to one U-shaped iron (61) by a fitting method on one side of the supporting frame (62), and The U-shaped iron (61) is fixed in the inner space surrounded by the four support shafts (65) on the front side of the rear frame (14b), and the iron piece (63) is also connected to the other end of the pedal wheel shaft (22). Then, this iron piece (63) is fixed by connecting the iron piece (64) of similar structure by folding it up and down at an appropriate position on the seat support shaft (21).
The bottom of the seat support shaft (21) is also connected by a U-shaped iron (60), and the U-shaped iron (60) is surrounded by four support shafts (65) on the rear side of the rear frame (14b). The pedal wheel shaft (22) is fixed to the space and when the vehicle body is unfolded, the pedal wheel shaft (22) is just hung on the support shaft (65) of the rear frame (14b), and when the vehicle body is folded, the pedal wheel shaft (22) is raised. The foldable bicycle according to any one of claims 1 to 3, which is configured.